HomeMy WebLinkAbout6.q. Request by Dakota Aggregates to Renew their Large Scale Mineral Extraction Permit through 2015 and to Renew their Aggregate Processing Interim use Permit through 2019 24 hour operation.
Coinmissioner Forster inquired if the signal light at Akron Avenue and CSAH 42 would be installed due to
the additional truck traffic. Staff stated that traffic likely will increase, but that the signal light cannot be
installed until a traffic study shows that the light is warranted. Commissioner Kenninger inquired if and
when the applicant can do additional berming in the northern area. The Planning Commission
recommended that the additional berming be completed by the 2016 annual inining review permit.
The Planning Commission recommended approval of 2015 Annual Operating Permit with the added
condition that the berms on the north side of the haul road be installed and vegetated by the 2016 annual
inining review permit. The Planning Commission recommended appYOVaI of the 2015-2019 Aggxegate
Processing IUP with 24 hour, 7 day a week operation with no changes to the staff recommendations.
Both recommendations passed on a 5-0 vote.
Letter from Residents Julie Taylor and Robert and Ruth Pryor
The City of Rosemount has received letters from Julie Taylor (14425 Atwater Way) and Robert and Ruth
Pryor (14755 Bloomfield Circle) objecting to project and the expansion to the 24 hour operation. Ms.
Taylor's letter expresses concerns about wildlife habitat, air and noise pollution. She insists that
environmental due diligence is conducted before the requests are approved. The Pryors'letter expresses
concern about noise and light from the 24 hour operation and smells and to�ns from the asphalt plant.
These environmental studies have been conducted and have been approved. In November 2010, the
University of Minnesota Board of Regents approved the Environmental Impact Statement (EIS) of the
aggYegate inining operation that included the review of air, noise, and�vildlife concerns. Follo�ving that
approval,The City approved mining and ancillary use plans in DecemUer 2012 that includes requirements
that no more than 160 acres be mined at any one time. Exhausted inining areas�vill need to be reclaimed
to an agricultural condition before any addiuon mining areas can be approved. This reclamation aYea�vill
preserve the e�sting habitat. Additionally, Dakota r,ggregates has a Minnesota Total Facility Operating
Permit (r�ir Permit#03700370-001) to address an air pollution issues.
SUMMARY
Applicant: Dakota rlggregates
Property O�vner: University of 1�linnesota (UMore)
Location: Northwest corner of County Road 46 and Station TYail; and '/a mile
south of Count�� Road 42
Mining area in acres: 113.48 acre total area; 35.02 acres about '/4 mile south of County
Road 42 (Dry Mining) and 78.46 acres at the northwest corner of
County Road 46 and Station Trail (Dry/Wet Mining).
Comp Plan & Zoning: Agricultural Research
Extraction progress: 4 Phases of 16 (approximately 4% complete).
Nature of request: Annual renewal and expansion of hours of operation.
Legal Authority
The large scale mineral extraction renewal approval is a quasi-judicial action,meaning that if the
application meets the City Code, the large scale mineral extraction perinit conditions and interim use
peYmit regulations, then the large scale mineYal extraction renewal must be approved. Staff supports
approval of the large scale mineral extraction renewal and finds that it is suUstantially in conformance with
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the approved large scale mineral eYtraction permit and the interim use permit regularions with
recommended conditions. The detailed analysis of this finding is provided below.
Minmg Operation
Dakota Aggregates began mining operation in 2013,in which they removed and paid aggregate taxes on
16,500 tons of sand and processed and placed 40,000 tons of Class 5 on the floor of the Aggregate
Processing area. From January 1 through September 12, 2014, Dakota Aggregates sold 596,000 tons of
material. Dakota Aggregates has not hauled back any material in 2014.
The Large Scale Mineral Extraction Ordinance allows for t�vo separate mining areas of no more than 80
acres each. The four North Dry Mining sub-phases total 35.02 acres. The four Dry/Wet Mining sub-
phases tota178.46. All acrivit�� the Dry/Wet Mining area in 2015 is planned to occur outside and above
the ground�vater. They are currendy about 60 vertical feet deep and are working west�vhile maintaining
the 60 foot depth. In the future, once the entire area of these four Dry/Wet Mining sub-phases are within
a couple feet of the groundwater, Dakota Aggregates will bring in a barge and dragline to begin mining
below the groundwater elevation. The rest of the Dry�/Wet Mining phases will be mined�vith the barge
and dragline.
Groundwater Monitoring
Before the mining in the groundwater can occur,groundwater monitoring must be conducted to establish
the pre-mining groundwater characteristics. The City has xetained Leggette, Brashears, & Graham, Inc
(LBG) to evaluate the groundwater monitoring. American Engineering and Testing, Inc. (AET� has
submitted a report on behalf of Dakota Aggregates that covers the first five groundwater samples. Barr
Engineering,�vho Dakota r�ggregates used during the initial aggregate mining application, had conducted
the first four samples and testing. AET used Barr's results in their report.
LGB has identified some errors in the details of the equipment, such as the height of a well casting that
has been shortened, but did not identify any errors in the testing results. AET has recommended reducing
the monitoring to semi-annual for 2015, as called out in the approved 2012 groundwater monitoring plan.
LBG is not prepared to support that recommendation at this time, mostly due to a detection of 1.5 mg/1
of diesel range organics (DRO) in well 4-D (4 deep) during their June 2014 sampling event. This result is
surprising, but independendy does not indicate a health risk. There is a companion�vell, 4S (4 shallo�v)
that did not detect any�DRO. l�dditionall�-, there�vas no detection of petroleum related�-olatile organic
compounds (VOC) in any�vells. If there�vere a petroleum spill at the mine or up-gradient from the mine,
DRO would expect to be detected the shallow well (4S) befoxe there was a detection in the deep well (4D)
and there would expect to be a companion detection of VOC.
City staff and LBG have meet�vith AET and Dakota rlggregates to discuss the report and the DRO
detection. r�ET has stated that their pump had broken during this sample and that they had to bail the
sample from the�vell and that there may have been some contact with the�vell casing. AET had already
been scheduled to collect a November 2014 groundwater sample. LBG has suggested, and AET�vill
include, a silica gel test foY DRO in the November testing if DRO is detected. The silica gel test can help
to determine if the DRO is naturally occurring, such as from decaying plant material. The last condition in
the recommended 2015 mineral extraction permit is for t,ET to revise their report to include the
NovembeY 2014 testing results and submit that to the City by January 31, 2015. This�vill give LBG time
to review the results before mining activity�vill resume in the spring. If there is no detection of DRO and
no detection of any new chemicals, LBG�vill likely agree to reduce monitoring to semi-annual. If there is
DRO detection or a detection of a ne�v chemical, City staff and LBG will require the continuation of
quarterly monitoring in 2015.
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North Dry Mining Area
Dakota Aggregates is permitted in 2014 for North Dry Mining sub-phases 1A, 1B, 2C, and 2D and Dakota
r,ggregates is proposing to continue in those same sub-phases in 2015. The North Dry Mining area will
access County Road 42 through a haul road running west to east along the former rail line about a '/a mile
south of County Road 42, then north along Akron Avenue to the intersection with County Road 42. They
are currendy about 60 vertical feet deep and are working�vest and south�vhile maintauung the 60 foot
depth. ThYOUgh SeptembeY 12, 2104, 429,000 tons of material has been processed thYOUgh a screen. Of
that material, 65,000 tons (about 15% of the material pYOcessed) of rock was carried on a conveyor to the
aggregate processing�vash plant in the Ancillar5�Use Facility (AUF). Of the remaining material, 155,000
tons of sand (about 27% of the total material) was sold and trucked off site via the Akron Avenue and
CSAH 42 intersection. The remaining sand has either been used to construct berms on the north side of
the haul road or piled on site to be sold in the future. The berms are being conducted to reduce dust
migration and reduce visual unpacts.
The 60 foot depth of the north mining area is about 30 feet deeper than the approved reclamauon plan.
The current bottom elevation of the north inining area is 882.5 feet. A test hole in the bottom of the
north mining area indicated the groundwater elevation at 879.3 feet. Staff has added a condition to the
permit that limits the north mining to a depth of 882 feet. Dakota Aggregates �vill need to haul-back
material from construction projects or re-deposit their sand to achieve the reclamation height. The north
inining area currendy is permitted for about 35 acres. An additional 45 acres can be permitted in the north
before reclamation would be required. No areas in the north beyond these 45 acres would be permitted
until an equal amount of acres are reclaimed to the height approved in the interim reclamation plan.
For 2015, Dakota Aggregates is requesting to be allo�ved to mine, to truck from the north mine area, and
to operate the aggregate processing 24 hours a day, 7 days a week. Staff supports inining in the south
Wet/Dry mining area 24 hours a day, 7 days a week. Staff supports mining 24 hour a day, 7 days a week
with the following conditions: no crushing or washing equipment allo�ved; and extra hours for only up to
five (5) MnDOT or other public agency xoadway construction projects. The road�vay construcrion project
condition is to have clearly defined beginning and end to the trucking schedule. Staff is not supportive of
open ended or long term projects like the new Vikings stadium which is consistendy hauling material from
the aggregate processing facility. With the annual inining permit renewals, the City can restrict hours of
operations or place additional conditions into the permit if issues arise or if development begins within the
proxirn.ity of the mining operations.
South Dry/Wet Mining Area
Dakota Aggregates is permitted in 2014 for Dry/Wet Mining sub-phases 1A, 1B, 2A and 2B; and Dakota
r�ggregates is proposing to continue in those same sub-phases in 2015. The Dry/Wet Mining Sub-phases
are located on the north�vest corner of County Road 46 and Station Trail and the trucks access County
Road 46 at Station Trail. Through September 12, 2014, 554,176 tons of materials were processed and
441,000 tons of material were sold and trucked off site via CSAH 46. In 2015, material sales �vill include
sales to the concrete and asphalt plants that�vill be located�vithin the r,UF. The berms around the south
mining area and the AUF have been constructed, seeded and vegetated.
In 2014, Dakota r�ggregates has been able to mine and operate their aggregate processing facility from 6
a.m. to 10 p.m. on Monday through Friday and 7 p.m. to 7 p.m. on Saturdays. Dakota Aggregates has
been able to truck material from the aggregates processing facility 24 hours a day, 7 days a�veek. Dakota
rlggregates has stated that these hours cannot meet the market demand foY aggYegate products and that
they have not been able to bid on some construction contracts because of the limitation on houYS of
operation. In the concrete plant approval eaxlier this year, the concrete plant can operate and truck
materia124 hours a week, 7 days a week.
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Staff is supporrive of the operation of the aggregate processing facility 24 hours a day, 7 days a week with
two additional conditions. First, that the trucks haul the same route as the concrete plant trucks: traveling
east or west along County Road 46 to either South Robert Trail or U.S. Highway 52 before heading north.
Second, that these extended hours can be adjusted if development occurs within 660 feet of the r�UF.
This second condition reflects that the aggregate processing is a 5 year IUP (through 2019),unlike the
mineral extraction permit that requires annual renewal.
Annual Resident Correspondence
Before the public hearing notice was mailed, the only complaints that the City has received regarding
Dakota Aggregates has been the amount of time that some berms took to be seeded after they were
graded. Staff has worked with Dakota Aggregates to ensure that the berms be seeded and vegetated within
the time required by City and State regulations. The police department has not received any complaint
regarding the Dakota Aggregates operation.
RECOMMENDATION
Staff recommends that the City Council approve of the renewal of the Dakota Aggregates Large Scale
Mineral Extraction Permit for 2015 and the Aggregate Processing Interim Use Permit for 2015 through
2019. Staff has included conditions that would allow 24 hours a day, 7 days a week operations. This
recommendation is based on the information submitted by the applicant, findings made in this report and
the conditions detailed in the attached memorandums.
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2015 Large Scale Mineral Extraction Annual Operating Permit
Agreement for Dry/Wet Mining Sub-phases lA, 1B, 2A and 2B; and
North Dry Mining Sub-phases lA, 1B, 2C and 2D
DAKOTA AGGREGATES, LLC
A. Dakota Aggregates, LLC (hereinafter "the Operator") signs a written consent to
these conditions binding itself and its successors, heirs ar assigns to the conditions of
said permit.
B. The term of the permit shall extend from January l, 2015 until December 31, 2015
unless revoked prior to that for failure to comply with the permit requirements.
C. Mining in Wet/Dry Mining Sub-phases 1 A, 1 B, 2A, and 2B may occur 24 hours a
day, 7 days a week.
D. Mining and screening in North Dry Mining Sub-phases lA, 1B, 2C, and 2D may
occur 24 hours a day, 7 days a week.
E. Trucks may haul from North Dry Mining Sub-phases lA, 1B, 2C, and 2D from 6
a.m. to 10 p.m. Monday through Friday and 7 a.m. and 7 p.m. Saturday , except for
hauling outside those hours for the execution of a contract requirement of up to five
(5) MnDOT or other public agency roadway construction project. During the
execution of the MnDOT or other public contracts, the hauling may occur 24 hours a
day, 7 days a week.
F. No crushing or washing equipment shall be located or used in the North Dry Mining
Sub-phases 1 A, 1 B, 2C, and 2D.
G. The North Dry Mining Sub-phases 1 A, 1 B, 2C, and 2D shall not be mined below the
882 foot elevation.
H. Protection equipment that is installed on hauling trucks, such as covers for the truck
beds, shall be used while traveling on public roads. Non-use will be considered a
violation of the permit condition.
L Trucks shall not use any locally designated road as part of their haul route except for
the shortest route between the delivery site and the nearest County, State or U.S.
highway.
J. Trucks may not be loaded heavier that the public haul roads posted weight
restrictions.
K. Engineered designs for any reclamation steeper than a 3 to 1 slope must be submitted
and approved by the City Engineer before the reclamation can occur.
L. A gate and thirty (30) feet of fencing on each side of the gate shall be installed at the
Station Trail access. The gate shall be closed and locked when the mining or
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ancillary uses are not in operation. A knox box or similar devise shall be installed to
provide emergency personal access to the key far the lock.
M. Conformance with the City Engineer's Memorandum dated September 20, 2012.
N. The University of Minnesota (or designated entity) shall obtain approval and/or
concurrence from the MPCA regarding completion of appropriate investigations
and/or actions taken in response to identified releases of hazardous substances,
pollutants or contaminates as defined under Minn. Statute 115B, and as deemed
reasonable and necessary by the MPCA.
O. Dakota Aggregates shall clean dirt and debris from streets that has resulted from
extraction or hauling operations related to the Mineral Extraction Permit. After
Dakota Aggregates has received 24-hour verbal notice, the City will complete or
contract to complete the clean-up at Dakota Aggregates' expense. In the event of a
traffic hazard as determined by the City Administrator(or the Administrator's
designee) or Rosemount Police Department, the City may proceed immediately to
complete or contract cleanup at Dakota Aggregates' expense without prior
notification.
P. No topsoil shall be removed from the site unless Dakota Aggregates can demonstrate
that there is topsoil in excess of the amount needed to reclaim the End Use Grading
Plan with at least six (6) inches of topsoil. Dakota Aggregates shall take necessary
measures to prevent erosion of the stockpiled topsoil.
Q. Any costs incurred now or in the future in changing the location of existing public or
private utilities including but not limited to pipelines, transmission structures and
sewer infrastructure located within the permit area shall be the sole obligation and
expense of Dakota Aggregates.
R. All costs of processing the permit, including but not limited to planning fees,
engineering fees, and legal fees, shall be paid by Dakota Aggregates prior to the
issuance of the permit. Dakota Aggregates shall reimburse the City for the cost of
periodic inspections by the City Administrator or any other City employee for the
purpose of insuring that conditions of the permit are being satisfied. Dakota
Aggregates agrees to reimburse the City for any other costs incurred as a result of
the granting or enforcing of the permit.
S. Dakota Aggregates shall deposit with the Planning Department a surety bond or cash
deposit in the amount of Eight Hundred Fifty One Thousand one Hundred Dollars
($851,100) in favor of the City for the cost of restoration, regrading and/or
revegetating land disturbed by mining activities and to ensure performance of all
requirements of this resolution and City ordinances by Dakota Aggregates. The
required surety bonds must be:
1. With good and sufficient surety by a surety company authorized to do business
in the State of Minnesota.
2. Satisfactory to the City Attorney in form and substance.
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3. Conditioned that Dakota Aggregates will faithfully comply with all the terms,
conditions and requirements of the permit; all rules, regulations and
requirements pursuant to the permit and as required by the City and all
reasonable requirements of the City Administrator (or the Administrator's
designee) or any other City officials.
4. Conditioned that Dakota Aggregates will secure the City and its officers
harmless against any and all claims, for which the City, the Council or any City
officer may be made liable by reason of any accident or injury to persons or
property through the fault of Dakota Aggregates.
5. The surety bond or cash escrow shall remain in effect from January 1, 2015
until July 31, 2016.
Once the interim reclamation grades and vegetation have been established and
approved by the City, the bond may be reduced by Five Hundred Sixty Seven
Thousand Four Hundred Dollars ($567,400 = 113.48 acres times $5,000 per acre).
Once the end use grading grades and vegetation have been established and approved
by the City, the bond may be reduced by Two Hundred Eighty Three Thousand
Seven Hundred Dollars ($283,700 = 113.48 acres times $2,500 per acre). Upon
thirty (30) days' notice to the permit holder and surety company, the City may
reduce or increase the amount of the bond or cash deposit during the term of this
permit in order to insure that the City is adequately protected.
T. A landscape security of$42,625 (155 trees times $250 per tree times 110%) shall be
provided. After the trees have been established, $38,362 (90%) of the landscaping
security can be released. The final $4,263 (10%) shall be maintained through the
existence of the berm for Dry/Wet Sub-Phase lA and 2A to ensure that as trees die,
that those trees are replaced. The landscaping security shall be in the form of a letter
of credit in favor of the City or cash escrow.
U. Dakota Aggregates shall furnish a certificate of comprehensive general liability
insurance issued by insurers duly licensed within the State of Minnesota in an
amount of at least Five Hundred Thousand and no/100 ($500,000.00) Dollars for
injury or death of any one person in any one occurrence, and at least One Million
Five Hundred Thousand and no/100 ($1,500,000.00) Dollars for injury or death of
more than one person arising out of any one occurrence and damage liability in an
amount of at least Two Hundred Fifty Thousand and no/100 ($250,000.00) Dollars
arising out of any one occurrence. The policy of insurance shall name the City as an
additional insured and shall remain in effect from January 1, 2014 until July 31,
2015.
V. Dakota Aggregates shall hold the City harmless from all claims or causes of action
that may result from the granting of the permit. Dakota Aggregates shall indemnify
the City for all costs, damages, or expenses, including but not limited to attorney's
fees that the City may pay or incur in consequence of such claims.
W. Dakota Aggregates shall submit to the City semi-annually a written report indicating
the amount of material extracted from the site for the prior six-month period. After
said written report is submitted, the City shall perform an inspection of the site to
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confirm compliance with the conditions within the Annual Operating Permit.
X. Reclamation requires the replacement of the stockpile of topsoil to the mined area,
reseeding, and mulching necessary to re-establish vegetative cover for permanent
slope stabilization and erosion control, provided also that the minimum depth of
topsoil shall not be less than six (6) inches after reclamation. No restored slopes may
exceed the gradients shown on Interim Reclamation Plan.
Y. No mining activity will occur within fifteen (15) vertical feet of bedrock.
Z. Dakota Aggregates shall compact the entire reclamation site to a minimum
compaction of 95% of maximum dry density.
AA. If not utilized by the University of Minnesota for agricultural purposes, fully
reclaimed areas will be permanently seeded within 14 days of final completion. All
disturbed non-operating areas not utilized by the University of Minnesota for
agricultural purposes shall be seeded at a minimum of once per year, prior to
October 1 with MnDOT seed mix 130B. Operating areas including work faces,
material stockpiles, haul roads, staging areas, and active reclamation areas are not
required to be seeded.
BB. Dakota Aggregates shall submit quarterly to the City documentation of the Barr
Engineering, Inc. (or other City approved geotechnical testing firm) environmental
and geotechnical testing with documentation verifying the source and quantity of the
"haul-back" material. These reports shall be provided within fourteen (14) days
after the end of the quarter.
CC. Dakota Aggregates shall submit an incidence report to the City within three days of
any testing that fails for contamination or hazardous materials, or will not produce a
normal moisture-density relationship for compaction.
DD. Truck operators within the pit area shall not engage in practices involving slamming
tailgates, vibrating boxes, using of"jake" or engine brakes (except in emergency
situations), or other such activities that result in excessive noise.
EE. Dakota Aggregates shall incorporate best management practices for controlling dust,
erosion, noise, and storm water runoff as specified by the Minnesota Pollution
Control Agency and the United States Environmental Protection Agency and
proposed in the submitted LSME application to the City.
FF. Compliance with Dakota County Ordinances No. 110 and 111, as well as all other
applicable Federal, Minnesota, Dakota County, and Rosemount regulations. Soil
materials in the Property will be managed in accordance with the Minnesota
Pollution Control Agency's Best Management Practices (BMPS)for the Off-Site
Reuse of Unregulated Fill.
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GG.Dakota Aggregates may not assign this permit without written approval of the City.
Dakota Aggregates will be responsible for all requirements of this permit and all
City ordinances on the licensed premises for the permit period unless Dakota
Aggregates gives sixty (60) days prior written notice to the City of termination and
surrenders permit to the City. Dakota Aggregates shall identify all Operators prior to
their commencement of mineral extraction-related activities in the pit area. The City
shall have the authority to cause all mineral extraction activities to cease at any time
there is an apparent breach of the terms of this Permit.
HH. Dakota Aggregates shall comply with such other requirements of the City Council as
it shall from time to time deem proper and necessary far the protection of the
citizens and general welfare of the community.
II. Dakota Aggregates shall install and establish vegetation on a berm located on the
north side of the haul road by the review of the 2016 annual permit.
JJ. American Engineering Testing, Inc. (AET) shall revise the 2013-2014 Annual
Monitoring Report to include the November 2014 groundwater testing and submit
the revised report to the City by January 31, 2015. Leggette, Brashears, & Graham,
Inc. (LBG) shall review the revised report on behalf of the City and has the authority
to reduce the groundwater sampling to semi-annual based on the results of the
November 2014 testing results.
IN WITNESS WHEREOF, Dakota Aggregates, LLC, the Operator, hereby consents
and agrees to the foregoing conditions of said Annual Operating Permit this day
of , 20 .
Dakota Aggregates, LLC
By:
Tim Becken, Its Chief Manager
STATE OF MINNESOTA )
) ss
COUNTY OF )
The foregoing instrument was acknowledged before me this day of
, 20 , by Tim Becken, Chief Manager of Dakota Aggregates, LLC, the
Operator, on behalf of the Corporation.
Notary Public
CITY OF ROSEMOUNT
DAKOTA COUNTY, MINNESOTA
RESOLUTION 2014-
A RESOLUTION APPROVING THE INTERIM USE PERMIT TO DAKOTA
AGGREGATES TO OPERATE AGGREGATE PROCESSING AND RECYCLED
AGGREGATE PRODUCTS PROCESSING
WHEREAS, the City of Rosemount received an application from Dakota Aggregates LLC for an
Interun Use Permit (IUP) to allow aggregate processing and recycled aggregate products processing
at their inining facility concerning property legally described as:
That part of the Southwest Quarter of Section 34 and the Southeast Quarter of Section 33,
all in Township 115, Range 19, Dakota County, Minnesota, described as follows:
Beginning at the southwest corner of said Southwest Quarter of Section 34; thence South 89
degrees 42 minutes 10 seconds East, assumed bearing along the south line of said Southwest
Quarter of Section 34, a distance of 2192.17 feet; thence North 04 degrees 21 minutes 18
seconds East a distance of 142.12 feet; thence North 01 degrees 12 minutes 32 seconds West
a distance of 368.88 feet; thence North 01 degrees 58 minutes 09 seconds West a distance of
266.72 feet; thence northeasterly 112.50 feet, along a tangential curve, concave to the
southeast, having a central angle of 56 degrees 02 minutes 58 seconds and a radius of 115.00
feet; thence northerly 56.43 feet, along a non-tangential curve, concave to the east, having a
central angle of 35 degrees 55 minutes 23 seconds, a radius of 90.00 feet and a chord which
bears North 17 degrees 26 minutes 35 seconds West; thence North 00 degrees 31 minutes 07
seconds East, tangent to last described curve, a distance of 206.76 feet; thence northerly
83.26 feet, along a tangenrial curve, concave to the west, having a central angle of 34 degrees
04 minutes 23 seconds and a radius of 140.00 feet; thence North 56 degxees 26 minutes 44
seconds East a distance of 45.08 feet; thence North 00 degrees 31 minutes 07 seconds Fast a
distance of 299.38 feet; thence North 88 degrees 50 minutes 09 seconds West a distance of
537.90 feet; thence North 01 degrees 06 minutes 55 seconds East a distance of 542.56 feet to
the following descriUed line;
Commencing at the north�vest corner of said Southwest Quarter of Section 34; thence South
00 degrees 11 minutes 58 seconds West, along the west line of said Southwest Quarter of
Section 34, a distance of 549.45 feet to the point of beginning of the line to be described;
thence South 89 degrees 28 minutes 53 seconds East a distance of 2646.92 feet to the east
line of said South�vest Quarter of Section 34 and there terminating.
thence North 89 degYees 28 minutes 53 seconds West, along said described line, a distance
of 1701.18 feet to said�vest line of the Southwest QuaYter of Section 34; thence South 89
degrees 42 minutes 48 seconds West a distance of 133.00 feet; thence North 89 degrees 25
minutes 32 seconds West a distance of 1911.08 feet;thence South 00 degrees 00 minutes 00
seconds West a distance of 6.G9 feet; thence South 24 degrees 59 minutes 14 seconds East a
RESOLUTION 2014-
distance of 32.37 feet; thence South 38 degrees 36 minutes 54 seconds East a distance of
58.76 feet; thence South 24 degrees 49 minutes 30 seconds East a distance of 21.39 feet;
thence South 08 degrees 35 minutes 01 seconds East a distance of 17.27 feet; thence South
01 degrees 13 minutes 27 seconds East a distance of 55.61 feet; thence South 20 degrees 01
minutes 53 seconds East a distance of 40.77 feet; thence South 20 degrees 03 minutes 43
seconds East a distance of 111.64 feet; thence South 15 degrees 03 minutes 51 seconds East
a distance of 118.93 feet; thence South 27 degrees 25 minutes 38 seconds East a distance of
247.59 feet; thence South 21 degrees 09 minutes 19 seconds East a distance of 78.57 feet;
thence South 18 degrees 19 minutes 12 seconds East a distance of 190.08 feet; thence South
26 degrees 25 minutes 05 seconds East a distance of 227.06 feet; thence South 46 degrees 46
minutes 51 seconds East a distance of 98.15 feet; thence South 33 degrees 47 minutes 16
seconds East a distance of 171.67 feet; thence South 23 degrees 42 minutes 30 seconds East
a distance of 90.20 feet; thence South 17 degrees 56 minutes 04 seconds East a distance of
178.92 feet; thence South 17 degrees 54 minutes 28 seconds East a distance of 132.38 feet;
thence South 25 degrees 39 minutes 33 seconds East a distance of 126.20 feet;thence South
30 degrees 29 minutes 59 seconds East a distance of 103.92 feet; thence South 28 degrees 45
minutes 36 seconds East a distance of 250.67 feet to the south line of said Southeast Quarter
of Section 33; thence North 89 degrees 34 minutes 22 seconds East, along said south line, a
distance of 1060.22 feet to the point of beginning.
E�CEPT that part lying southerly of north right of way line of Counry State Aid Highway
No. 46 per DAKOTA COUNTY ROAD RIGHT OF WAY MAP NO. 253 and DAKOTA
COUNTY ROr�D RIGHT OF WAY Mr�P NO. 254, according to the recorded plats
thereof, Dakota County,Minnesota.
WHEREAS, on October 28, 2014, the Planning Commission of the City of Rosemount held a
public hearing to review the IUP request from Dakota Aggregates; and
WHEREAS, the Planning Commission adopted a motion recommending that the City Council
approve the interim use permit to allow operation of aggregate processing and recycled aggregate
products processing; and
WHEREAS, the Planning Commission adopted a motion recommending that the City Council
approve the Interim Use Permit subject to conditions; and
WHEREAS, on November 18, 2014, the City Council of the City of Rosemount reviewed the
Planning Commission's recommendations; and
WHEREAS, on November 18, 2014, the City Council of the City of Rosemount approved the
interun use permit allo�ving operation of aggregate processing and recycled aggregate products
processing; and
NOW,THEREFORE, BE IT RESOLVED, the Council of the City of Rosemount hereby
approves the IUP for Dakota Aggregates LLC to allow operation of aggregate processing and
recycled aggregate products processing, subject to the follo�ving conditions:
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RESOLUTION 2014-
1. The University of Minnesota shall grant to the City,its agents, einployees, officers, and
contractors and to any suret�� of Dakota Aggregates LLC performing Dakota Aggregate
LLC's obligations and the agents, employees, officers, and contractors of the surety an
irrevocable license,in a form approved by the City Attorney, to enter the Property to
perform all work and inspections deemed appropriate by the City to enforce conditions
imposed on the University to the extent the University engages in mineral extraction, or
Dakota Aggregates, LLC in connection with permitting of mining operations on the
Property,including�vork that the City elects to perform or requires the surery to perform as
a result of the permittee's default. This license shall continue in effect until all mining
operations on the Property are complete and all conditions imposed by the City have been
complied with.
2. The term of the permit shall extend from November 19, 2014 until December 31, 2019
unless revoked prior to that for failure to comply with the permit requirements.
3. Crushing, screening,washing, and stockpiling at the aggregate processing facilit��may occur
24 houYS a day, 7 days a week. These hours may be adjusted if development occurs within
660 feet of the Ancillary Use Facility (AUF) that rezones anj�property to a nonagricultural
zoning district. Loading and hauling at the aggregate processing facility may occur 24 hours a
day, 7 days a week provided the loading and hauling does not allow trucks to back up or
unload and the hauling conducted is for a construction contract requiring construction
outside the normal operational hours. Trucks hauling outside of the 6 a.m. to 10 p.m.
Monday through Friday and from 7 a.m. and 7 p.m. on Saturday shall access CSAH 46 either
via the Station Trail access or the Akron Avenue access only and may not use Biscayne
Avenue or any UMore roadway (Akron,Angus,Barbara or Blaine Avenues) to access CSAH
42. Trucks shall not use any locally designated road as part of their haul route except for the
shortest route between the delivery site and the nearest County, State or U.S. highway.
4. Recycling aggregate products (Rr,P) shall not exceed 30% of the total aggregate production.
An annual Yeport of the amount of mine aggregate processed and amount of RAP processed
shall be submitted to the City by January 15`h of the year follo�ving issuance of the permit.
5. Protection equipment that is installed on hauling trucks, such as covers for the truck beds,
shall be used while traveling on public roads. Non-use�vill be considered a violation of the
permit condition.
6. Trucks may not be loaded heavier that the public haul roads posted weight restrictions.
7. A gate and thirty (30) feet of fencing on each side of the gate shall be installed at the Station
Trail access. The gate shall be closed and locked when the mining or ancillary uses aYe not in
operation. A knox box or similar devise shall be installed to provide emergencj�peYSOnaI
access to the key for the lock.
8. Conformance with the City Engineer's Memorandum dated September 20, 2012.
9. The University of Minnesota (or designated entit��) shall obtain approval and/or concurrence
from the MPCA regarding completion of appropriate investigations and/or actions taken in
response to identified releases of hazardous substances, pollutants or contaminates as
3
RESOLUTION 2014-
defined under l�iinn. Statute 115B, and as deemed reasonable and necessary by the MPCA.
10. Dakota Aggregates shall clean dirt and debris from streets that has resulted from extraction
or hauling operations related to the l�2ineral Extraction Permit. r,fter Dakota rlggregates has
received 24-hour verbal notice, the City will complete or contract to complete the clean-up
at Dakota Aggregates' expense. In the event of a traffic hazard as determined by the City
Adininistrator (or the Administrator's designee) or Rosemount Police Department, the City
may proceed immediately to complete or contract cleanup at Dakota r,ggregates' expense
without prior norification.
11. No topsoil shall be removed from the site and Dakota Aggregates shall take necessary
measures to prevent erosion of the stockpiled topsoil.
12. Any costs incurred now or in the future in changing the location of e�sting public or private
utilities including but not limited to pipelines, transmission structures, and sewer
infrastructure located within the permit area shall be the sole obligation and expense of
Dakota Aggregates.
13. All costs of processing the permit,including but not limited to planning fees, engineering
fees, and legal fees, shall be paid by Dakota Aggregates prior to the issuance of the permit.
Dakota Aggregates shall reimburse the City for the cost of periodic inspections by the City
Administrator or any other City� employee for the purpose of insuring that conditions of the
permit are being satisfied. Dakota Aggregates agrees to reunburse the City for any other
costs incurred as a Yesult of the granting or enforcing of the permit.
14. Dakota r�ggregates shall furnish a certificate of comprehensive general liabiliry insurance
issued by insurers duly licensed within the State of Minnesota in an amount of at least Five
Hundred Thousand and no/100 ($500,000.00) Dollars for injury or death of any one person
in any one occurrence, and at least One I�iillion Five Hundred Thousand and no/100
($1,500,000.00) Dollars for injury or death of more than one person arising out of any one
occurrence and damage liability in an amount of at least Two Hundred Fifty Thousand and
no/100 ($250,000.00) Dollars arising out of any one occurrence. The policy of insurance
shall name the City as an additional insured and shall remain in effect from November 19,
2012 until July 31, 2020.
15. Dakota Aggregates shall hold the City harmless from all claims or causes of action that may
result from the granting of the perrYit. Dakota AggYegates shall indemnify the City for all
costs, damages, or eYpenses,including but not limited to attorney's fees that the City may
pay or incur in consequence of such claims.
1 G. Truck operators within the ancillary use facility area shall not engage in practices involving
slamming tailgates,viUrating boxes, using of"jake" or engine brakes (except in emergency
situations) or other such activities that result in excessi�-e noise.
17. Dakota Aggregates shall incorpoYate best management practices for controlling dust,
erosion, noise, and storm�vater runoff as specified by the I�Zinnesota Pollution Control
Agency�and the United States Environmental Protection r'�gency and proposed in the
suUmitted LSME application to the City.
4
RESOLUTION 2014-
18. Compliance�vith Dakota County Ordinances No. 110 and 111, as �vell as all other applicable
Federal,Minnesota, Dakota Counry, and Rosemount regulations. Soil materials in the
Propert��will be managed in accordance with the Minnesota Pollution Control Agency's Be.rt
Management Practice.i(BMPS�for the Of-Site Rear�e of Unregulated Fill.
19. Dakota Aggregates may not assign this permit without written approval of the City. Dakota
Aggregates will be responsible for all requirements of this permit and all City ordinances on
the licensed premises for the permit period unless Dakota Aggregates gives sixty (60) days
prior written notice to the City of termination and surrenders permit to the City. Dakota
r�ggregates shall identify all Operators prior to their commencement of aggregate
processing-related activities in the pit area. The City shall have the authority to cause all
aggregate processing or recycled aggregate product processing activities to cease at any time
there is an apparent breach of the terms of this Permit.
20. Dakota Aggregates shall comply with such other requirements of the City Council as it shall
from time to tune deem proper and necessary for the protection of the citizens and general
welfare of the community.
ADOPTED this 18`'' day of November, 2014 by the City Council of the City of Rosemount.
William H. Droste, Mayor
ATTEST:
Clarissa Hadler, Cit�- Clerk
5
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Disdaimer: Map and parce!data are believed to be accurate, 6ut accuracy is not guaranteed. This is not Map Scale
a legal document and should not be substituted for a tit/e search,appra;sal, survey, or for zon;ng 1 inch = 1601 feet
verification. Dakota County assumes no/ega!responsrbility for the information contained rn this data. 10/10/2014
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UMore Park Large Scale Non Metallic Mineral Extraction
Annual Operating Permit Application for Dry/Wet Mining Sub-Phases lA-2B& North Dry
Mining Phases lA,1B,2D&2C
UMore Park
City of Rosemount
September 29, 2014
1. Land Owner•
Regents of the University of Minnesota
UMore Development LLC
1300 South 2"d Street, Suite 208
Minneapolis, MN 55455
2. A�plicant/Operator:
Dakota Aggregates, LLC
2025 Centre Pointe Boulevard, Suite 300
Mendota Heights,MN 55120
(651) 688-9292
3. Le�al_Descr_ption of the Land upon which Excavation is active:
That part South Half of Section 28, Township 1 15, Range 19, Dakota County, Minnesota, lying
westerly of the following described line;
Commencing at the northeast corner of the Southeast Quarter of said Section 28;thence South 89
degrees 48 minutes 43 seconds West, assumed bearing along the north line of said Southeast
Quarter, a distance of 1058.90 feet to the point of beginning of the line to be described; thence
South 18 degrees 23 minutes 48 seconds West a distance 1211.64 feet;thence South 07 degrees 11
minutes 26 seconds East a distance of 1472.46 feet; thence South 75 degrees 07 minutes 52 seconds
East a distance of 126.03 feet to the south line of said Southeast Quarter and there terminating.
EXCEPT the plat of i1NIVERSITY ADDITION, said Dakota County.
AND
Section 33, Township 115, Range 19, Dakota County, Minnesota; EXCEPT the East 133.00 feet of
the North 549.43 feet of the Southeast Quarter of said Section 33; EXCEPT the East 133.00 feet of
the South 930.25 feet of the Northeast Quarter of said Section 33; also EXCEPT that part of said
Northeast Quarter described as follows:
Beginning at the northeast corner of said Northeast Quarter;thence South 00 degrees 1 1 minutes 58
seconds West, assumed bearing along the East line of said Northwest Quarter,a distance of 800.63
feet;thence North 81 degrees 23 minutes 25 seconds West a distance of 40.76 feet;thence North 38
degrees 17 minutes 54 seconds West a distance of 819.06 feet; thence North 75 degrees 07 minutes
52 seconds West a distance of 580.25 feet to the north line of said Northwest Quarter; thence North
89 degrees 51 seconds 14 seconds East, along said north line, a distance of 1111.53 feet to the point
of beginning.
AND
1
That part of the Northwest Quarter of Section 34, Township 115, Range 19, Dakota County,
Minnesota, described as follows:
Commencing at the northwest corner of said Northwest Quarter; thence South 00 degrees 11
minutes 58 seconds West, assumed bearing along the west line of said Northwest Quarter, a
distance of 800.63 feet to the point of beginning of the land to be described;thence continuing
South 00 degrees 11 minutes 58 seconds West, along said west line, a distance of 912.75 feet;
thence North 89 degrees 51 minutes 14 seconds East a distance of 647.18 feet; thence North 00
degrees 11 minutes 58 seconds East a distance of 813.16 feet;thence North 81 degrees 23 minutes
25 seconds West a distance of 654.21 feet to the point of beginning.
AND
That part of the Southwest Quarter of Section 34, Township 115, Range 19, Dakota Counry,
Minnesota, lying southerly of the following described line:
Commencing at the northwest corner of said Southwest Quarter;thence South 00 degrees 11
minutes 58 seconds West, assumed bearing along the west line of said Southwest Quarter,a
distance of 549.45 feet to the point of beginning of the line to be described; thence South 89
degrees 28 minutes 53 seconds East a distance of 2646.92 feet to the east line of said Southwest
Quarter and there terminating
And lying westerly, northwesterly and northerly of the following described line:
Commencing at the southwest corner of said Southwest Quarter;thence South 89 degrees 42
minutes 10 seconds East, along the south line of said Southwest Quarter, a distance of 2192.17 feet
to the point of beginning of the line to be described;thence North 04 degrees 21 seconds 18
seconds East a distance of 142.12 feet; thence North O1 degrees 12 minutes 32 seconds West a
distance of 368.88 feet; thence North Ol degrees 58 minutes 09 seconds West a distance of 266.72
feet; thence northeasterly 194.60 feet, along tangential curve, concave to the southeast, having a
central angle of 96 degrees 57 minutes 13 seconds and a radius of 115.00 feet; thence South 85
degrees 00 minutes 56 seconds East,tangent to last described curve, a distance of 157.25 feet;
thence easterly 99.70 feet, along a tangential curve, concave to the north, having a central angle of
09 degrees 25 minutes 45 seconds and a radius of 605.84 feet; thence northeasterly 100.73 feet,
along a reverse curve, concave to the northwest, having a central angle of 56 degrees O1 minutes 50
seconds and a radius of]03.00 feet to the west line of said Southwest Quarter and said line there
terminating.
2
North Drv Mining Phases lA, 1B,2C&2D Annual Review Update
North Dry Mining Phases:
Sub phase lA: active mining (+/- 07.68 Acres)
Sub phase 1B: active mining (+/- 10.05 Acres)
Sub phase 2C: active mining (+/- 09.17Acres)
Sub phase 2D: active except for approx. 3 acres to be opened in 2015 (+/- 08.12Acres)
Total Acres North Dry Mining: (+/-35.02 Acres)
Aggregate Material sold from January 1 2014- September 12, 2014: 155,000 Tons
Aggregate stockpiles onsite as of September 12, 2014
Screened Sand: 207,000 Tons
Screened Rock: 2,000 Tons
Tons screened from January 1, 2014 through September 12,2014: 429,000 Tons of which
approximately 65,000 Tons of rock was conveyed to the aggregate processing facility for mixing
and production of various aggregate products.
Dry/Wet Mining Sub-Phase lA-2B Annual Review Update:
Dry/Wet Mining Phases:
Sub phase lA: active mining (+/-25.32 Acres)
Sub phase 1 B: active mining (+/- 18.21 Acres)
Sub phase 2A: active except for approx.4 acres to be opened (+/- 17.03 Acres)
Sub phase 2B: active except for approx. 14 acres to be opened (+/- 17.90 Acres)
Total Acres Dry/Wet Mining: (+/-78.46 Acres)
Material sold from January 1 2014- September 12, 2014: 441,000 Tons
Aggregate Stockpiles in Aggregate Processing Facility as of September 12, 2014:
Concrete Sand: 177,000 Tons
Mason Sand: 24,000 Tons
3/8" Rock: 15,400 Tons
#67 Rock: 11,500 Tons
1'/z" Rock: 4,100 Tons
Tons Produced from January 1, 2014 through September 12, 2014: 554,176 Tons
Recycled Ag�regate:
TONS of RAP imported and processed January 1 2014- September 12, 2014: 30,000 Tons
3
Site Improvements Update:
- 80 foot ornamental and power operated gate installed at Station Trail and County Road #46
- 50 foot ornamental and power operated gate to be installed at Akron Avenue in the Spring of
2015
- 50 foot custom gate on North Haul road at Akron
- County Road#46 turn movement striping upgrades from Station Trail to Akron Avenue on
County Road#46
- Internal road striping on Station Trail and Akron Avenue
- Maintenance of existing trees situated on the berm abutting CSAH#46 including replacement of
approximately 20 trees which were a victim of winter burn
- Berm has been constructed behind the trees on the north side of the permitted North Dry mining
phases and behind the tree line for added screening to the residents located north of County
Road #42 and also to address the seasonal City of Rosemount opacity standards.
- Berm Construction in progress abutting the North side of the North haul road to efficiently screen
truck hauling operations.
- Concrete curb and gutter and roadway pavement has been installed from Station trail at
CSAH#46 up to the RAP yard and also from Akron Avenue up to the Asphalt Plant facility.
The remainder of the concrete curb and gutter and roadway pavements section on l 58t" street
will be completed in the Spring
- Professional commercial entrance signage are scheduled for installation at both Akron and Station
Trail entrances along#46
- Approximately 25 acres of area related to berms, ditch side slopes, common areas,and
boulevards have been establislled with vegetation including over 65,000 Square yards of poly
blanket this year alone. Cumulatively over 40 acres around the perimeter of the site have been
established with permanent vegetation.
- Electrical power looped From Station Trail to Akron Avenue
- Construction of the North haul road for haul truck access onto County road#46.
- Construction of the 10 acre Storm water Facility including permanent vegetation.
Proposed Extension of Processin�Hours of Operation
We would like to propose 24 hours of operation within the Wet- Dry Mining phases/aggregate
processing facility and in the North Mining phases. Currently, under the permitted hours of
operation, we are unable to produce an adequate supply of rock products for our customers. Both
North Dry Mining and South Wet/Dry Mining operations are required to be operational 24 hours in
4
order to produce the quantity of rock products within the aggregate processing facility that are
required to meet the market demand.
The neighbors residing on the north side of County Road#42 will not be affected by 24 hours
operation for there is over a mile of separation to the AUF processing wash plant and we have
constructed a 40 plus foot berm to the north of the processing plant as welL In the North Dry
Mining active phases we have constructed a berm to the north of the active phases behind the
existing trees. Moreover, the North Dry Mining screening operations to date have not disrupted our
neighbors during our pennitted hours of operation.
Lighting that is required for nighttime operations will be shielded to prevent lights from being
directed at traffic on public right of ways and will not exceed 1 lumen at the EIS boundary in order
to not disturb the surrounding residential areas. To date we have hauled approximately 75,000 tons
of material out of the aggregate processing area between the hours of 10 p.m. to 6 a.m. with
sufficient lighting and without complaints from residents so illuminated material processing during
nighttime hours will not disrupt the residential areas adjacent to the facility.
Proposed Extension of Truck Hauling Hours of Operation alon�the North Haul Road
We would like to propose to extend our truck hauling hours to 24 hours a day in the North Mining
phases which would utilize the north haul road to access Akron Avenue to County Road#42. A
berm will be constructed abutting the north haul road to the north in order to screen truck hauling
activities along the north haul road which is located approximately 1600 feet from the residents
located on the north side of County Road #42. Additionally, a berm has been constructed behind
the tree line which borders the active North Dry Mining phases to the north along the 130 acre
mining buffer. This berm will be completed on a phase by phase basis as north mining activities
progress.
In line with MNDOT and other local agency guidelines, nighttime construction activities are
required to occur to avoid peak hour traffic congestion to allow for increased safety along the
roadways for the construction crews working at night. In 2014, we lost significant material sales
out of the north mining phases to jobs where night hauling was required and the haul from County
Road #46 out of the AUF increased the trucking time to where we were unable to be competitive.
Truck hauling after the normal hours of operation utilizing the north haul road would be limited to
public/MNDOT jobs only and not more than 5 jobs a year.
5
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- TESTI\G, l\C.
CONSULTANTS
• ENVIRONMENTAL
• GEOTECHNICAL
• MATERIALS
• FORENSICS 2013-2014 ANNUAL MONITORING
REPORT
UMore Mining Area
Sections 33, 28, and 34, Township 115, Range 19W
Rosemount, Minnesota
AET Project No. 03-05081
Date:
September 26, 2014
Prepared for:
Dakota Aggregates, LLC
2025 Centre Pointe Blvd, Suite 300
Mendota Heights, MN 55120
www.amengtest.com
w
Z�
A1IERIGI\ CONSULTANTS
• ENVIRONMENTAL
� E\GI�EERI\G • GEOTECHNICAL
• MATERIALS
� TEST��c� I�G . FORENSICS
September 26, 2014
Mr. Patrick A. Bergin, PE
Dakota Aggregates, LLC
2025 Centre Pointe Blvd, Suite 300
Mendota Heights, MN 55120
RE: 2013-2014 Annual Monitoring Report
Sections 33, 28, and 34, Township 115, Range 19W
Rosemount, Minnesota
AET Project No. 03-05081
Dear Mr. Bergin:
American Engineering Testing,Inc.(AET)has prepared this report for the above-referenced project
in Rosemount, Minnesota. This report presents the results of the monthly groundwater monitoring
and quarterly groundwater sampling that AET and Barr Engineering Co. (Barr) conducted at the
Umore Mining Area for Dakota Aggregates, LLC in 2013 and 2014.
In summary,AET and Barr have collected eight sets of groundwater elevations and quarterly water
chemistry field measurements,including specific conductance,pH,temperature,redox potential,and
turbidity. We have also collected five sets of groundwater samples that were analyzed for parameters
specified in the Hydrogeologic Study and Water Monitoring Plan (WMP) prepared by Barr in
September 2012.Based on our findings,we recommend decreasing same ofthe sampling parameters
for 2014-2015 and continuing with semi-annual monitoring with slight adjustments to the
monitoring schedule. We appreciate the opportunity to assist you on this project. If you have
questions regarding the information in this report, please contact me.
Sincerely,
American Engineering Testing, Inc.
�9-�����
Jake T. Dalbec, PG
Geologist
Phone: (651) 603-6624
Email: jdalbec@amengtest.com
Enclosures
cc: Mr. Pat Mason, Dakota Aggregates, LLC
cc: Mr. Eric Zweber, City of Rosemount
cc: Mr. Steven Lott, University of Minnesota
550 Cleveland Avenue North�St.Paul, MN 55114
Phone 651-659-9001IToll Free 800-972-6364 IFax 651-659-1379 �www.amengtest.com�AA/EEO A�
This document shall not be reproduced,except in full,without written approval from American Engineering Testing,Inc `
2013-2014 ANNUAL MONITORING REPORT
UMore Mining Area
Rosemount, Minnesota
AET Project No. 03-05081
September 26,2014
Prepared for: Prepared by:
Dakota Aggregates, LLC American Engineering Testing, Inc.
2025 Centre Pointe Blvd, Suite 300 550 Cleveland Avenue North
Mendota Heights, MN 55120 St. Paul, MN 55114
(651) 659-9001/www.amengtest.com
Attn: Mr. Patrick A. Bergin, PE
Report Authored By: Report Reviewed By:
09-��� ���-����'��
Jake T. Dalbec, PG Kathryn J. Kleiter, PG
Geologist Principal Hydrogeologist
Manager, Environmental Engineering Dept.
Copyright 2014 American Engineering Testing,Inc.
All Rights Reserved
Unauthorized use or copying of thrs document is strictly prohibited by anyone other than the client for the specifrc project.
TABLE OF CONTENTS
2013-2014 ANNUAL MONITORING REPORT
UMore Mining Area
Rosemount,Minnesota
AET Project No. 03-05081
September 26,2014
1.0 INTRODUCTION..................................................................................................................... 1
2.0 PROJECT DESCRIPTION....................................................................................................... 1
3.0 SCOPE OF SERVICES............................................................................................................2
4.0 GROUNDWATER MONITORING RESULTS ......................................................................4
4.1 Water Level Elevations.......................................................................................................4
4.2 General Chemistry Parameters............................................................................................4
4.3 Microbiological................................................................................................................... 5
4.4 Metals.................................................................................................................................. 6
4.5 SVOCs................................................................................................................................6
4.6 VOCs................................................................................................................................... 6
4.7 Pesticides............................................................................................................................. 6
4.8 DRO.................................................................................................................................... 7
5.0 DISCUSSION........................................................................................................................... 7
6.0 RECOMMENDATIONS..........................................................................................................9
7.0 STANDARD OF CARE......................................................................................................... 10
TABLES
1. Monitoring Device Completion Information
2. Groundwater Elevations
3. Analytical Groundwater Data
FIGURES
1. Site Location Map
2. Site Map
3a. Groundwater Contour Map (5/21/14 Shallow Monitoring Wells)
3b. Groundwater Contour Map (8/21/14 Shallow Monitoring Wells)
4a. Groundwater Contour Map (5/21/14 Deep Monitoring Wells)
4b. Groundwater Contour Map (8/21/14 Deep Monitoring Wells)
APPENDICES
A. Methods and Procedures
B. Original Barr Data
C. June 2014 Laboratory Analytical Reports
D. MN DNR Water Level Data
E. References
2013-2014 ANNUAL MONITORING REPORT
UMore Mining Area
Rosemount, Minnesota
AET Project No. 03-05081
September 26, 2014
1.0 INTRODUCTION
Dakota Aggregates, LLC obtained a mining extraction permit from the City of Rosemount for an
aggregate mine in Rosemount, Minnesota. As part ofthe permitting process, Barr Engineering Co.
(Barr)prepared the"Hydrogeologic StZrdy and Water Monitoring Plan"(WMP)dated September 2009
for Dakota Aggregates,LLC. The WMP outlines procedures to collect data on selected groundwater
chemistry and flow characteristics as they may relate to the local baseline groundwater chemistry,
mining and ancillary use facility (AUF) operations, and timely detection of various potential
contaminants before they may reach future City of Rosemount water supply wells.The nearest City
of Rosemount water supply well is proposed to be 1,900 feet northeast and downstream from the
mining area.
The purpose of this report is to present the monitoring results from April 2013, to August 2014, in
accordance with the reporting requirements stipulated in the WMP. In this report, we present the
results from eight sets of groundwater elevations, five sets of water chemistry field measurements,
and five sets of groundwater samples that were analyzed for parameters specified in the WMP.
2.0 PROJECT DESCRIPTION
The AUF and relevant portions of the UMore Mining Area (UMA) located within the City of
Rosemount are hereafter collectively referred to as the Site. The Site is located in Section 33 and
portions of 28 and 34, Township 1 15, Range 19W, Dakota County, Minnesota, and comprises
approximately 946 acres in the northwestern corner of UMore Park (Figure 1).
Approximately 20 to 180 feet of unconsolidated glacial deposits primarily consisting of sand,gravel,
and till overly an erosional bedrock surface(Barr,2012). Sand and gravel will be extracted from the
surface of the majority of the Site. There will be both wet and dry mining phases and the wet mining
phases will resu(t in a groundwater lake approximately 132 acres in surface area. For further
information regarding the background, setting, Site history, and previous investigations, proposed
mining activities, and hydrogeologic setting, please refer to the WMP.
For this monitoring period, six monitoring wells have been installed on the Site(Figure 2) by Barr
and AET in accordance with the WMP and requests by the City of Rosemount. The six monitoring
wells (RMW-3S, RMW-3D, RMW-4S, RMW-4D, RMW-SS, and RMW-SD) were installed as
nested wells where "S" wells indicate a screened interval in the shallow outwash aquifer and "D"
Dakota Aggregates,LLC 2013-2014 Annual Monitoring Report
UMore Mining Area Page 2 of 10
AET Project No.03-05081 September 26,2014
wells indicate a screened interval in the deep outwash aquifer. An existing monitoring well, MW-
B 1-001,was installed prior to completion of the WMP and was incorporated into the WMP for the
initial stages of groundwater monitoring. Monitoring well completion information is included in
Table l.
3.0 SCOPE OF SERVICES
For this reporting period, Dakota Aggregates, LLC authorized AET to provide the following
services.
Groundwater Elevation Monitoring
• Purchased and installed self-recording pressure transducer/data loggers(i.e.TROLLs)in two
monitoring wells (RMW-4s and RMW-Ss) located on the Site.
• Conducted monthly manual measurements of groundwater elevation in RMW-3s,RMW-3d,
RMW-4s, RMW-4d, RMW-Ss, RMW-Sd, and MW-B1-001. Note, monthly manual
measurements of groundwater were also collected in the Production We((once the Minnesota
Department ofNatural Resources(MN DNR)Appropriations Permit 2014-0244 details were
clarified by the MN DNR in June 2014.
• Downloaded TROLL data concurrently with each monthly manual groundwater elevation
measurement event,tracked TROLL data in a spreadsheet, and processed the TROLL data.
Groundwater Quality Monitoring—First Semiannual Sampling Event
One field duplicate sample and one equipment blank sample were collected during the June
groundwater sampling event for quality control. Additionally, field parameters including specific
conductance, pH, temperature, redox potential, and turbidity were measured while purging and/or
upon sampling each monitoring well. In accordance with your requested scope of services and the
WMP, AET collected groundwater samples from the following monitoring wells for laboratory
analysis of the following parameters:
• Baseline sampling of RMW-4s and MW-B1-001 which included laboratory analysis of:
o Glyphosate
o Total coliform
o [Organochlorine pesticides, Minnesota Department of Agriculture (MDA) List 1
pesticides, MDA List 2 pesticides] (pesticides)
o [Total phosphorus, total cyanide, bicarbonate as CAC03, carbonate as CO3, chloride,
nitrate+ nitrite as N, sulfate, total dissolved solids TDS] (general chemistry)
Dakota Aggregates,LLC 2013-2014 Annual Monitoring Report
UMore Mining Area Page 3 of 10
AET Project No.03-05081 September 26,2014
o [Dissolved arsenic,dissolved beryllium,dissolved calcium,dissolved copper,dissolved
iron, dissolved lead, dissolved magnesium, dissolved mercury, dissolved potassium,
dissolved sodium, dissolved thallium] (metals)
o Volatile organic compounds (VOCs)
o Diesel range organics (DRO)
o Semi-volatile organic compounds (SVOCs) limited to 2,4-dinitrotoluene and 2,6-
dinitrotoluene
• "Routine" sampling of RMW-3s, RMW-3d, RMW-4d, RMW-Ss, and RMW-Sd which
included laboratory analysis of:
o Total coliform
o General chemistry
o Pesticides (minus MDA List 2 Pesticides which were not detected in the previous four
baseline sampling events)
o Metals
o VOCs
o DRO
Reporting
For reporting services, AET:
• Reported water level elevation data to the Minnesota Department of Natural Resources
(MNDNR) in spreadsheet format by July l SI and soon by October lst as required by Dakota
Aggregates' Water Appropriations Permit No. 2014-0244 once the TROLLs were installed.
• Transferred data including electronic data deliverables(EDDs),laboratory reports,and water
level elevations to the City of Rosemount, Dakota County,and the Client after the first AET
monitoring/sampling event with this annual report.
• Prepared this annual report summarizing data collected from the quarterly sampling events
and monthly water level measurements.
The general methods and procedures followed by AET during the course of this project are
summarized in Appendix A. These methods and procedures are in general conformance to the
methods and procedures outlined in the WMP. Significant deviations, if any, from the standard
methods as presented are discussed within the text of this report.
Dakota Aggregates,LLC 2013-2014 Annual Monitoring Report
UMore Mining Area Page 4 of 10
AET Pro�ect No.03-05081 September 26,2014
4.0 GROUNDWATER MONITORING RESULTS
The groundwater sampling events for this period were conducted in April 2013, September 2013,
November 2013,March 2014,and June 2014.The groundwater monitoring elements included water
levels, general chemistry parameters, and the other analytical parameters specified in the scope
above.Barr conducted the groundwater sampl ing through the March 2014 event and their data tables
that were provided to AET are included in Appendix B. AET conducted the June 2014 sampling
event.The analytical chemistry data is included in Table 3 and the laboratory analytical reports from
the June 2014 event are included in Appendix C.
4.1 Water Level Elevations
Water level elevations are listed in Table 2 and are shown on Figures 3A, 3B, 4A,and 4B. Figures
3A and 3B show groundwater contours forthe shallow monitoring wells(RMW-SS,RMW-3S,MW-
B 1-001, RMW-4S) and Figures 4A and 4B show groundwater contours for deep monitoring wells
(RMW-SD,RMW-4D,and RM W-3D). Groundwater contours for the shal(ow and deep monitoring
wells were depicted separately because of a confining glacial till layer that exists between each
independently screened interval at the nested well locations.
The groundwater levels in the wells on the dates of monitoring ranged from elevation 880.11 to
891.72. The higher groundwater elevations thus far are consistently in RMW-SS whereas the lower
groundwater elevations have been in RM W-3D. The hydraulic gradient was measured to be 0.003
foot per foot from the contour maps.
4.2 General Chemistry Parameters
The general chemistry parameters were either measured in the field or measured in a laboratory.The
general chemistry parameters above reporting limits for the sampled monitoring wells were
statistically analyzed and a summary is presented in the following table:
2013-2014 Groundwater General Chemistry Parameter Statistics
Parameter Average Minimum Maximum Standard
Deviation
Dissolved oxygen 6.67 mg/L 1.07 mg/I 10.75 mg/I 2.67 mg/I
pH 7.22 6.50 7.79 0.24
Redox (oxidation
57.73 mV -81.00 mV 222.00 mV 58.26 mV
potential)
Specific Conductance @ 751.16 450.00 1169.00 161.90
25°C umhos/cm umhos/cm umhos/cm umhos/com
Temperature 10.23 °C 9.19 °C 12.32 °C 0.77°C
Turbidity 13.08 NTU 0.28 NTU 129.00 NTU 31.76 NTU
Dakota Aggregates,LLC 2013-2014 Annual Monitoring Report
UMore Mining Area Page 5 of 10
AET Project No.03-05081 September 26,2014
2013-2014 Groundwater General Chemistry Parameter Statistics
Parameter Average Minimum Maximum
Standard
Deviation
Alkalinity,bicarbonate,as
CaCO3 266.63 mg/I 129.00 mg/I 347.00 mg/I 39.58 mg/I
Chloride 33.16 mg/I 6.70 mg/I 100.00 mg/I 100.00 mg/I
Cyanide 17.95 µg/I 16.90 µg/I 19.00 µg/I 19.00 µg/I
Nitrate+Nitrite,as N 7.46 mg/I 0.17 mg/I 13.00 mg/I 13.00 mg/I
Nitrogen, Nitrate as N 10.22 mg/I 8.30 mg/I 12.00 mg/I 12.00 mg/I
Phosphorus,total,as P 0.08 mg/I 0.01 mg/I 1.20 mg/I 1.20 mg/I
Solids,total dissolved 398.11 mg/I 140.00 mg/I 810.00 mg/I 810.00 mg/I
Sulfate,as SO4 26.87 mg/I 6.70 mg/I 65.00 mg/I 65.00 mg/I
mg/I=milligrams per liter
µg/I=micrograms per liter
mV= millivolts
C=centigrade
NTU =nephelometric turbidity unit
umhos/cm =micro siemens per centimeter
4.3 Microbiological
Total coliforms were detected at different counts throughout the past monitoring period as shown in
the following table:
Summary of Total Coliforms Results
Well
Location/Date Apr-13 Sep-13 Nov-13 Mar-14 Jun-14
MW-B1-001 N/A 1 cfu/100 ml 1 cfu/100 ml ND >1 cfu/100 ml
RMW-5S 133 cfu/100 ml ND 2 cfu/100 ml ND >1 cfu/100 ml
RMW-5D 5 cfu/100 ml ND 10 cfu/100 ml ND >1 cfu/100 ml
RMW-35 165 cfu/100 ml N/A N/A N/A 1700 cfu/100 ml
RMW-3D 3 cfu/100 ml ND 1 mpn/100 ml ND ND
RMW-4S N/A ND 1 mpn/100 ml 19 cfu/100 ml ND
RMW-4D 6 cfu/100 ml ND 1 mpn/100 ml ND ND
Equip Blank N/A N/A N/A N/A >1 cfu/100 ml
N/A= Not analyzed
ND = Not detected above laboratory reporting limits
mpn = most probable number
cfu =colony forming unit
ml = milliliter
Dakota Aggregates,LLC 2013-2014 Annual Monitoring Report
UMore Mining Area Page 6 of 10
AET Project No.03-05081 September 26,2014
4.4 Metals
Calcium, copper, iron, magnesium, potassium, and sodium were the only metals detected above
laboratory reporting limits in the groundwater samples collected over this last sampling period.
Copper was only measured once in RMW-3S at 6 µg/1 during the June 2014 sampling event.
4.5 SVOCs
No SVOCs were detected above (aboratory reporting limits during any of the sampling events.The
herbicide glyphosate(Roundup)also was not detected above laboratory reporting limits during any
of the sampling events.
4.6 VOCs
Only one VOC, dichlorodifluoromethane (Freon), was detected above laboratory reporting limits
during this past monitoring period. Freon was detected at low concentrations three times in RM W-
4S, twice in RMW-3D, and once in RMW-SD as shown in the following table:
Summary of Dichlorodifluoromethane Results
Parameter/Date Apr-13 Sep-13 Nov-13 Mar-14 Jun-14
MW-61-001 N/A ND ND ND ND
RMW-5S ND ND ND ND ND
RMW-5D ND ND ND 1.1 µg/I ND
RMW-35 ND N/A N/A N/A ND
RMW-3D ND ND ND 1.6µg/I 2.1µg/I
RMW-4S ND 8.5 µg/I 6.8µg/I 1.9µg/I ND
RMW-4D ND ND ND ND ND
Equip Blank N/A N/A N/A N/A ND
N/A= Not analyzed
ND= Not detected above laboratory reporting limits
µg/I= micrograms per liter
4.7 Pesticides
Four pesticides, a-BHC, aldrin, desethylatrazine, and heptachlor were detected during this past
monitoring period. Since the pesticides were measured at very low concentrations,we have summed
the individual pesticide concentrations for each well during each sampling event to simplify the
pesticide resuits below:
Dakota Aggregates,LLC 2013-2014 Annual Monitoring Report
UMore Mining Area Page 7 of 10
AET Project No.03-05081 September 26,2014
Summary of Pesticides Results(Non-Specific Summed Pesticide Totals)
Parameter/Date Apr-13 Sep-13 Nov-13 Mar-14 Jun-14
MW-61-001 ND ND ND ND ND
RMW-55 0.191 µg/I 0.15 µg/I 0.14µg/I 0.16µg/I ND
RMW-5D ND 0.10µg/I 0.10µg/I 0.11µg/I ND
RMW-3S 0.039µg/I N/A N/A N/A ND
RMW-3D 0.041µg/I ND ND ND ND
RMW-4S N/A ND ND 0.082µg/I ND
RMW-4D 0.030µg/I ND ND 0.065µg/I ND
Equip Blank N/A N/A N/A N/A ND
N/A= Not analyzed
ND= Not detected above laboratory reporting limits
µg/I= micrograms per liter
4.8 DRO
DRO was only detected above laboratory reporting limits during the April 2013 and June 2014
sampling events. Measured DRO concentrations were less than 2 mg/1 with all of the DRO
concentrations measured at less than 0.3 mg/l except the RMW-4D sample collected in June 2014.
A summary of the DRO results is provided in the table below:
Summar of DRO Results
Parameter Date A r-13 Se -13 Nov-13 Mar-14 Jun-14
MW-B1-001 N A ND ND ND ND
RMW-5S 0.170 m 1 ND ND ND ND
RMW-5D 0.160 m 1 ND ND ND ND
RMW-3S 0.110 m 1 N A N A N A 0.15 m 1
RMW-3D 0.290 m 1 ND ND ND ND
RMW-4S N A ND ND ND ND
RMW-4D 0.230 m 1 ND ND ND 1.5 m 1
E ui Blank N A N A N A N A ND
N/A=Not analyzed
ND= Not detected above laboratory reporting limits
m 1 =milli rams er liter
5.0 DISCUSSION
In addition to the originally proposed scope of services, water levels were also measured in the
Production Well in accordance with MN DNR Appropriations Permit 2014-0244. The continuous
water level monitoring data from RMW-4S and RMW-5S and the manually measured Production
Well water level data submitted to the MN DNR are included in Appendix D. The Production Well
is located 600 feet southwest of monitoring well RM W-4S (Figure 2).
Dakota Aggregates,LLC 2013-2014 Annual Monitoring Report
UMore Mining Area Page 8 of l0
AET Project No.03-05081 September 26,2014
The Production Well is open hole within the Prairie Du Chien group 172 feet below ground surface
whereas the monitoring wells are screened in the unconsolidated glacial sediments which overlay the
Prairie Du Chien Group and St. Peter Sandstone. Therefore, groundwater elevation data from the
Production Well should not be combined with the groundwater elevation data from the monitoring
wells for purposes of the groundwater contouring because the wells are set within different
hydrogeologic units. Based on Figures 3A and 3B,the Production Well or mining activities may be
lowering the groundwater elevation southwest of RMW-4S (see Figures 3A and 3B).
The groundwater elevations of the shallow monitoring wells indicate that local groundwater flow
maybe highly variable near the ground surface. The groundwater elevations in the deep monitoring
wells are consistent with a regional groundwater flow direction to the northeast also discussed in the
WMP.
Groundwater elevation data were not collected at each well on the same day until monthly water
level monitoring activities commenced in May 2014. Future efforts will be made to measure water
levels within all monitoring wells prior to sampling in order to have water levels measured on the
same day rather than different days due to the amount of time necessary to sample all the wells.
Same-day water level measurements will result in more accurate groundwater flow direction
interpretations that may be correlated with the groundwater chemistry measured during sampling
events.
The first sampling event did not occur in MW-B1-001 and RMW-4S until September 2013.
Consequently, baseline sampling (four sampling events) of those wells was recently completed in
June 2014. Some parameters were not sampled in the other monitoring wells during the June 2014
semi-annual sampling event because those wells were being sampled for the fifth time and were
considered to be in the routine sampling phase,as specified in the WMP. Section 5.1.5 ofthe WMP
indicates that nitrates, pesticides, and DNT "may be sampled on a reduced frequency if baseline
monitoring indicates that these are not detected in groundwater" (Barr, 2012). The only exception
was RMW-3S,which has not yet been successfully sampled four times. RM W-3S was indicated as
being dry during the September 2013 and November 2013 events and has only been successfully
sampled twice for analysis of groundwater chemistry as of June 2014 due to the unreliable presence
of water within the well.
Only 0.66 feet of water column was measured during sampling of RMW-3S in June 2014. Such a
low water volume in RMW-3S resulted in a very turbid water sample because sampling was only
possible via use of a disposable bailer and rope. It should be noted that the highest turbidity and total
coliform results were measured in this sample which was collected from RM W-3S during its lowest
measurable water level.
Dakota Aggregates, LLC 2013-2014 Annual Monitoring Report
UMore Mining Area Page 9 of 10
AET Project No.03-05081 September 26,2014
The general chemistry parameters appear to be consistent with typical concentrations for
groundwater within unconsolidated glacial deposits,except for what appear to be random detections
of cyanide, spikes in turbidity, and consistent low levels of nitrate + nitrite as nitrogen. Spikes in
turbidity may partially be attributed to sampling methods(e.g.bailer vs.Grunfos submersible pump)
or lingering fines present in the newly installed wells.The consistent low levels of nitrate+nitrite as
nitrogen detected within each of the wells during most of the sampling events may be attributed to
agricultural activities including the use of fertilizers. Further laboratory analysis of some of the
samples collected by Barr during the November 2013 sampling event indicated that the nitrogen
detected was in the form of nitrate.
The highest counts of total coliform appear to be within the shallow monitoring wells. As Barr has
indicated with their data qualifiers, some the total coliform data appear to be suspect based on
laboratory estimated results. Furthermore, total coliform reported units appear to be inconsistent
when compared from sample to sample. It is possible that total coliform may result from manure
spreading and other agriculture activities on and around the Site; however, it is unlikely these
contaminants migrate easily from the ground surface to the groundwater table over 50 feet below the
ground surface. It is more likely that the presence of total coliform may be a cross contaminant.
Future concerted efforts will be made to disinfect sampling equipment prior to collecting a total
coliform sample and minimizing potential cross-contamination from the ground surface around the
well with sampling equipment and bottles.
No contaminant trends are apparent from the groundwater chemistry data collected thus far.Many of
the contaminant concentrations appear to be very low and contaminant detections appear to be
sporadic in their occurrence.The metals concentrations measured in the groundwater samples appear
to be consistent with typical background concentrations for metals within groundwater found in
unconso(idated glacial sediments. Trends, if any, in the groundwater data, may become more
apparent as the WMP continues to be implemented and more groundwater data is collected. Line
graphs will be provided for various contaminants of interest in the 2014-2015 Annual Monitoring
Report if the selected contaminants are consistently detected above reporting limits and further visual
depiction of the groundwater chemistry results is warranted.
6.0 RECOMMENDATIONS
Based on the results from 2013-2014 groundwater sampling and monitoring, we recommend
decreasing some of the sampling parameters for 2014-2015 and continuing with the semi-annual
monitoring frequency with adjustments to the monitoring schedule. Since there were no detections
of 2-4-dinitrotoluene, 2-6-dinitrotoluene, glyphosate, and MDA List 2 Pesticides above laboratory
reporting limits during any of the baseline sampling events thus far, we recommend reducing the
sampling of these parameters to once per year in accordance with Section 5.1.5 of the WMP.
Dakota Aggregates,LLC 2013-2014 Annual Monitoring Report
UMore Mining Area Page 10 of 10
AET Project No.03-05081 September 26,2014
Based on the continued agricultural use of lands immediately surrounding the active mining area,we
recommend shifting the timing of the semi-annual sampling events to May and November of next
year. Access to each of the wells may be easier during these months since there may be less crops
and accumulated snowfall,both of which can prohibit travel to and from the remote monitoring well
locations. We also recommend collecting one equipment blank sample for total coliform
immediately before and after each future semi-annual sampling event based on the inconsistent total
coliform results measured in the groundwater samples thus far. Other than the changes specified
above, we recommend continuing monitoring and sampling in 2014-2015 in accordance with the
WMP approved for this project.
7.0 STANDARD OF CARE
The data derived through this monitoring program have been used to develop our opinions about the
subsurface conditions at this site. Monitoring data represents point-in-time information for a specific
location and variations are to be expected between monitoring locations as well as normal seasonal
and yearly changes. The scope of services for this project was based on the parameters established in
the WMP.
AET has endeavored to perform its services for this project in a manner consistent with the level of
skill and care ordinarily exercised by other members of the profession currently practicing in this
area and under similar conditions. Other than this,no warranty,express or implied,is made. AET is
available upon request to explore and review differing site conditions identified during the operations
of the mine.
Ta bles
AET Project No. 03-05081
Table 1 -Monitoring Device Completion Information
2013-2014 Annual Monitoring Report
UMore Mining Area
AET Project No. 03-05081
Top of Bottom of
Minnesota Ground Screen/Staff Total Well
Monitoring Well ID Riser Screen
Number Unique ID Date Installed Surface Elevation Elevation Interval(Elev.- Depth from
Number Elevation Elev.) Surface(feet)
(feet MSL) (feet MSL)
RMW-3S 786792 4/10/2013 948.68 951.06 889.2 899.2-889.2 59.5
RMW-3D 786793 4/9/2013 948.76 951.19 804.8 814.8-804.8 144.0
RMW-4S 780925 8/9/2013 943.85 946.23 870.9 890.9-870.9 73.0
RMW-4D 786794 4/16/2012 944.10 946.64 791.1 806.1-791.1 153.0
RMW-SS 786795 4/15/2013 954.77 957.30 867.8 887.8-867.8 87.0
RMW-SD 786796 4/l5/2013 954.86 957.48 833.9 843.9-833.9 121.0
MW-B 1-001 769496 1/8/2009 948.00 949.29 877.0 887.0-877.0 71.0
Production Well 795453 8/19/2013 947.35 948.89 647.4 g19.4-647.4 300.0
(o en hole)
Notes:
1. Elevations provided by James R. Hill, Inc.
2. Bottom of Screen, Screen Interval,and Total Depth are rounded to the nearest tenth of a foot
Table 2-Groundwater Elevations
2013-2014 Annual Monitoring Report
UMore Mining Area
AET Project No. 03-05081
Minnesota Top of Riser Groundwater
Monitoring Well ID Unique ID Elevation Measurement Depth to Water Elevation
Number Number (feet MSL) Date (feet) (feet MSL)
9/24/2013 63.86 885.43
11/11/2013 63.90 885.39
3/26/2014 64.11 885.18
MW-61-001 769496 94929 5/21/2014 63.65 885.64
6/17/2014 63.21 886.08
7/17/2014 62.06 88723
8/21/2014 61.82 887.47
4/24/2013 61.10 889.96
9/25/2013 DRY DRY
11/12/2013 DRY DRY
RMW-3S 786792 951.06 3/26/2014 62.03 889.03
5/21/2014 61.66 889.4
6/17/2014 61.3 889.76
7/17/2014 59.98 891.08
8/21/2014 59.59 886.64
4/24/2013 69.23 881.96
9/25/2013 68.86 882.33
11/12/2013 68.94 882.25
RMW-3D 786793 951.19 3/26/2014 69.20 881.99
5/21/2014 68.70 882.49
6/17/2014 68.15 883.04
7/17/2014 67.22 883.97
8/21/2014 66.41 884.78
9/24/2013 62.37 883.86
11/12/2013 62.48 883.75
3/26l2014 62.75 883.48
RMW-4S 780925 946.23 5/21/2014 61.79 884.44
6/17/2014 61.26 884.97
7/17/2014 60.32 885.91
8/21l2014 59.59 886.64
4/25/2013 66.53 880.11
9/24/2013 62.20 884.44
11/12/2013 62.18 884.46
RMW-4D 786794 946.64 3/26/2014 62.54 884.10
5/21/2014 62.11 884.53
6/17/2014 61.57 885.07
7/17/2014 60.41 886.23
8/21l2014 59.6 887.04
4/25/2013 68.29 889.01
9/23/2013 68.22 889.08
11/11/2013 68.13 889.17
RMW-5S 786795 957.30 3/26/2014 68.48 888.82
5/21/2014 67.5 889.8
6/17/2014 66.98 890.32
7/17/2014 65.96 891.34
8/21/2014 65.58 891.72
Page 1 of 2
9/12/2014 2:51 PM
\\stp-fileservl\Data\03-ENV\Projects\03-05001-05200\03-05081 UMore Groundwater\Report\Tables\03-05081 UMore GW Table 2
Table 2 -Groundwater Elevations
2013-2014 Annual Monitoring Report
UMore Mining Area
AET Project No. 03-05081
Minnesota Top of Riser Groundwater
Monitoring Well ID Unique ID Elevation Measurement Depth to Water Elevation
Number Number (feet MSL) Date (feet) (feet MSL)
4/24/2013 68.51 888.97
9/23/2013 68.35 889.13
11/11/2013 68.39 889.09
RMW-SD 786796 957.48 3/26/2014 68.65 888.83
5/21/2014 67.73 889.75
6/17/2014 67.2 890.28
7/17/2014 66.17 891.31
8/21/2014 65.82 891.66
6/18/2014 62.1 886.79
Production Well 795453 948.89 7/17/2014 63.63 885.26
8/21/2014 60.58 888.31
DRY-No water present in well
Page 2 of 2
9/12/2014 2:51 PM
\\stp-fileservl\Data\03-ENV\Projects\03-05001-05200\03-05081 UMore Groundwater\Report\Tables\03-05081 UMore GW Table 2
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, ENGINEERING N 2013- 2014 Annual Monitoring Report
TESTING, �NC A UMore Mining Area
Sections 33, 28, and 34, Township 115, Range 19W
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Source�.High Resolution Orthoimagery, F�g u re 4A
Dakota County,Minnesota,Spnng 2013
Groundwater Contour Map
/�MERICAN 5/21/14 Dee Monitorin Welis
, ENGINEERING N 2013-2014 Annual Monitoring Report
TESTING, �NC A UMore Mining Area
Sections 33, 28, and 34, Township 115, Range 19W
� o soo ,,zoo Rosemount, Minnesota
Feet Date:09/12/2014 AET Project No.03-05081
File:UMMA_Fig4A_GVW52114_DPmxd Date:09/12/2014
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Source:High Resolution Orthoimagery, F�ry u re 4 g
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Groundwater Contour Map
AMERICAN 8/21/14 Dee Monitorin Wells
� ENGINEERING N 2013- 2014 Annual Monitoring Report
TESTING, �NC A UMore Mining Area
o soo ,,zoo Sections 33, 28, and 34, Township 115, Range 19W
� Rosemount, Minnesota
Feet Date:0 911 2/20 1 4 AET Project No.03-05081
File:UMMA_Fig4B_GWU82114_DPmxd Date:09/12/2014
LEGGETTE, BRASHEARS & GRAHAM, INC.
PROFESSIONAL CROUNDWATER AND
ENVIRONMENTAL ENGINEERING SERVICES
8 PINE TREE DRIVE
SU►TE 250
ST.PAUL,MN 55112
(651)490-1405
FAX(651)490-1006
wtiwv.lb�web.com
November 10, 2014
Eric Zweber
Senior Planner
Rosemount Community Development
2875 145r� Street West
Rosemount, MN 55068-4997
Re: 2013-2014 Annual Report Review
Dakota Aggregates LLC, UMore Mining Area
City of Rosemount, Minnesota
Dear Mr. Zweber:
On behalf of the City of Rosemount (City), Leggette, Brashears & Graham, Inc. (LBG)
has reviewed American Engineering Testing, Inc.'s (AET) 2013-2014 Annual Monitoring
Report, UMore Mining Area, September 26, 2014, prepared for Dakota Aggregates LLC (Dakota
Aggregates). The annual report covers the period from Apri1 2013 through August 2014. The
intent of the review was to verify that the monitoring activities were completed in accordance
with the groundwater monitoring plan outlined in Barr Engineering Company's (Barr)
Hydrogeologic Study and Water Monitoring Plan (WMP), dated September 2012, and the
conditions of the mining permit. The following sections provide a brief background followed by
a review of the monitoring data.
BACKGROUND
As part of the proposed sand and gravel mining area and ancillary use facility at the
University of Minnesota Outreach, Research, and Experimental Park (UMore) shown on Figure
1, the WMP was developed for the purpose of establishing baseline groundwater qua(ity prior to
mining and to provide a means for the timely detection of a potential release of petroleum and/or
hazardous substances into groundwater after mining commenced within the City's Drinking
Water Supply Management Area (Figure 2). The WMP provided for the phased installation and
CONNECTICUT•FLORIDA•ILLINOIS•MICHIGAN•MINNESOTA•MISSOURf•NEW JERSEY
NEW YORK•NORTH DAKOTA•OHIO•PENNSYLVANIA•SOUTH DAKOTA•TEXAS•WISCONSIN
Mr. Zweber 2 November 10, 2014
sampling of monitoring wells with the intent of monitoring the shallow and deep groundwater
flow systems both upgradient and downgradient of the proposed mine pit lake to be excavated
below the water table. Additional downgradient monitoring wells will be installed in the future
to monitor new potential source areas as mining proceeds.
During April and August 2013, representatives from AET, Barr, and/or LBG were onsite
to observe the initial phase of drilling and monitoring well installations. Drilling activities were
performed at three locations (RMW-3, RMW-4, and RMW-5) presented in the WMP. Well pairs
were installed at all three locations to monitor the shallow and deep portions of the
unconsolidated outwash deposits. The shallow wells were denoted with an "S" (RMW-3S,
RMW-4S, and RMW-SS) while the deep wells were identified with a "D" (RMW-3D, RMW-
4D, and RMW-SD). Figure 3 illustrates the monitoring well locations. A summary of LBG's
observations were provided to the City in letter reports titled Drilling and Monitoring Well
Installation Observations, Large Scale Mining District at UMore Park, City of Rosemount,
Minnesota, LBG, June 10, 2013 (April observations) and RMW-4S Drilling and Monitoring Well
Installation Observations, Large Scale Mining District at UMore Park, City of Rosemount,
Minnesota, LBG, September 4, 2013 (August observations).
In addition, the City requested LBG to review the 2°d round (September 2013) of
sampling results associated with groundwater samples collected by from the newly installed we(1
pairs and one preexisting well. LBG's review was summarized in a letter report titled September
2013 Monitoring Data Review, Large Scale Aggregate Mining District at UMore Park, City of
Rosemount, Minnesota, December 11, 2013. In brief, nitrate was the only parameter analyzed
that exceeded a drinking water standard. Nitrates will be discussed later in more detail.
GROUNDWATER MONITORING RESULTS AND DISCUSSION
As presented in the WMP, baseline groundwater quality will be determined following the
installation and development of each new monitoring well. This includes collecting groundwater
samples from each location for four consecutive quarters with the groundwater samples being
analyzed for the list of parameters on Table 4 in the WMP. Currently, all of the monitoring wells
have been sampled a minimum of four times with the exception of RMW-3S which has been
sampled twice. On occasion, RMW-3S has been dry or near dry which has prevented the
collection of the required baseline samples.
LEGGETTE,BRASHEARS& GRAHA�1,INC.
Mr. Zweber 3 November 10, 2014
AET's 2013-2014 annual report covers the period from April 2013 through August 2014.
Their report discusses water level monitoring, groundwater sampling, analytical results,
compliance with the WMP, and proposes changes to the monitoring schedule. Barr performed
groundwater monitoring activities from April 2013 through March 2014 while AET conducted
subsequent monitoring activities.
Water Level Elevations
During the repocting period, manual water level measurements in the four shallow wells
and three deep wells were conducted in April, September and November 2013, and in March,
May, June, July and August 2014 (8 events). It is LBG's understanding that RM W-4S and
RMW-SS are currently outfitted with pressure transducers/data loggers for the continual
recording of water levels. Groundwater contour maps were presented in the annual report for
both the shallow wells and deep wells for the monitoring events conducted in May and August
2014. LBG reviewed these data and associated maps and provide the following comments:
• Deep Wells: LBG concurs with AET's assessment of groundwater flow in the deep wells
being to the northeast at a gradient of approximately 0.003 foot/foot. This flow direction
and gradient are consistent with the September 2013 data previously reviewed by LBG
on behalf of the City. Well hydrographs illustrating the groundwater elevation changes
over time for each deep well are presented on Figure 4.
• Shallow Wells: LBG does not concur with AET's depiction of shallow groundwater
contours shown on Figures 3A and 3B in the annual report. Flow path lines drawn
perpendicular to the shallow groundwater elevation contours indicates that flow would be
primarily to the northwest and to the southeast. Review of the water level data indicates
RMW-3S is on occasion dry and/or the standing water column in the well is less than 2
feet from the bottom of the we(1 (Figure 5). Also, the water level fluctuations in this well
do not mimic the other shallow wells as shown by the shallow well hydrographs on
Figure 4. This is not surprising as RMW-3S is screened in perched groundwater present
on top of low permeability till that extends above the regional water table aquifer. If
RMW-3S is not used in contouring, the remaining shallow wells (RMW-4S, RMW-SS,
and MW-B]-001) show the principal horizontal shallow groundwater flow direction to
the northeast at a gradient of approximately 0.002 foot/foot for the May and August 2014
monitoring events (Figures 6 and 7). This flow direction is also consistent with previous
submittals and also the deeper flow system.
• Water Level Fluctuations: AET's report states that water levels ranged from 880.] 1 to
891.72 during the reporting period. It is believed that the 880.1 1 water elevation (RMW-
4D, April 2013) is in error and should be 883.95. LBG's records indicate the top of
casing (TOC) elevation for RMW-4D in April 2013 was 950.48. In August 2013, RMW-
4D was shortened approximately 3.8 feet due to regrading and was subsequently
resurveyed to an elevation of 946.64. The April 2013 depth to water measurement of
LEGGETTE,BRASIIEARS& GRAHAM,INC.
Mr. Zweber 4 November 10, 2014
66.53 appears to have been subtracted from the later resurveyed TOC. The error also
creates an anomalously low water elevation at RMW-4D which in turn indicates a
groundwater flow direction to the southeast which is contrary to data collected to date.
� Well 208404: Section 5.1.1 of the WMP calls for the collection of water levels from the
domestic well (208404) associated with the University of Minnesota North Beef Farm
(Figure 17A in the WMP). The well was to act as a baseline water level monitoring point
with monitoring to begin within 180 days of the permit approval and was to be part of the
long-term monitoring program as outlined in Table 2 of the WMP. In correspondence
dated September 2, 2014 from Barr to the City (Attachment 1), a number of
modifications to the WMP were presented. One of the modifications was the removal of
well 208404 from the monitoring program. LBG did not see any water level data for this
well in the annual report.
• Water Level Monitoring Frequency: AET's report notes that water levels measured
during sampling events have at times been measured over multiple days. LBG concurs
with AET's recommendation that all water level measurements should be collected on the
same day and the time interval between them minimized to get a snap shot of
groundwater elevations which will better represent shallow and deep groundwater flow
conditions.
• Production Well: LBG agrees with AET that the groundwater elevation data from the
Production Well completed in the Prairie du Chien bedrock formation should not be
combined with groundwater elevations in the overlying unconsolidated material as the
wells are completed in different hydrogeologic units.
• Transducer Data: It appears that the Ground Water Level Measurement Form
commencing on page D1 in Appendix D ofthe annual report should be labelled RMW-4S
versus RMW-SS. The RMW-SS data is believed to commence on page D10. It also
appears that water level measurements presented on pages D 1 through D20 (May 21 to
June 17, 2014) are repeated in subsequent pages covering the time period from May 21 to
August 21, 2014.
• Table 1 in AET's report indicates RMW-4D was installed on April 16, 2012. It was
installed on April ] 1, 2013.
Groundwater Qualitv
As of the June 2014 groundwater sampling event, all four baseline rounds of quarterly
groundwater samp(es had been collected from the monitoring wells (except RMW-3S, 2 rounds).
In accordance with Table 4 of the WMP, the samples were analyzed for the required parameters
using appropriate analytical methods and for the most part met the required laboratory reporting
limits. Groundwater stabilization data (dissolved oxygen, pH, oxidation reduction potential,
specific conductance, temperature, and turbidity) were also recorded in the field during the
sampling events. Compounds analyzed by the laboratory included the following;
LEGGE"I'TE,BRASHEARS& GRAHAM,INC.
Mr. Zweber 5 November ]0, 2014
� Diesel Range Organics (DRO),
• Glyphosate,
• Metals: 11 compounds,
• Pesticides:
o MDA List 1: 22 compounds,
o MDA List 2: 1 1 compounds,
o Organochlorine Pesticides: 21 compounds,
• Semi Volatile Organic Compounds (SVOCs): 2 compounds,
• Volatile Organic Compounds (VOCs): 68 compounds, and
• General Chemistry: 8 compounds including Bicarbonate Alkalinity, Carbonate
Alkalinity, Chloride, Nitrate + Nitrite as N, Sulfate, Total Cyanide, Total Phosphorus,
and Total Dissolved Solids.
The groundwater analytical results were compared to the criteria listed on Table 4 in the
WMP to determine if any compound concentrations exceeded applicable criteria. Criteria
included MDH Health Risk Limits (HRLs), MDH Health Advisory Table, Minnesota Pollution
Control Agency (MPCA) Drinking Water/Groundwater (DW/GW) Summary Table, and USEPA
Maximum Contaminant Levels (MCLs).
On occasion, laboratory reporting limits for select compounds have exceeded its
associated MCL and/or HRL. This may have been the result of insufficient technological
advances for the laboratory to achieve the MCL/HRL, sample matrix interference, and/or other
laboratory issues. In most cases where the reporting limit exceeded the MCL/HRL, the
laboratory method detection limit was less than the MCL/HRL. Elevated reporting limits were at
times noted for arsenic, beryllium, thallium, 1,2,3-trichloropropane, 1,2,4-trichlorobenzene, 1,2-
dibromo-3-chloropropane, 1,2-dibromomethane, cis-1,3-dichloro-l-propene, trans-1,3-dichloro-
1-propene, hexachlorobutadiene, vinyl chloride, dieldrin, heptachlor epoxide, and toxaphene.
Because no positive detections have been reported for the above compounds, the elevated
reporting limits do not appear to be cause for concern at this time. However, it is recommended
to check with the (aboratory to verify their reporting limits can or cannot meet the established
MCLs/HRLs.
With the exception of Nitrate + Nitrite as N (nitrate), none of the parameters analyzed
during the reporting period contained concentrations in excess of the criteria referenced above.
Below is a discussion on nitrate detections and other parameters that may be of interest which
may not have an MCL/HRL or the MCL/HRL applies to water distribution systems.
LEGGETTE,BRASHEARS& GRAHAM,INC.
Mr. Zweber 6 November 10, 2014
• Nitrates: Nitrates have been present to some degree in all of the monitoring wells. The
MCL and HRL for nitrates are both 10 milligrams per liter (mg/L). Nitrate
concentrations of 11 to 13 mg/L were reported to have been present in groundwater
samples co(lected from RMW-3D, RMW-SS and RMW-SD during the April, September,
and November 2013 monitoring events and in the MW-B1-001 sample collected in
March 2014. Nitrates were not present above 10 mg/L in samples collected from RMW-
3D, RMW-SS and RMW-SD in March and June 2014 nor in the June 2014 sample
collected from MW-B1-001. Concentrations in the remaining wells were less than 10
mg/L for all monitoring periods. Being that the surrounding land use is primarily
agricu(tural and RMW-SS and RMW-SD are hydraulically upgradient of the mining
operations, the elevated nitrate concentrations are not surprising. A water quality plot
illustrating nitrate concentrations over time is presented on Figure 8.
• Total Coliform: Total coliform has been present in at least one monitaring well during
each monitoring event over the reporting period. Groundwater samples collected from
upgradient wells RMW-SS/D have contained total coliform during three of the five
sampling events. Total coliforms are the standard by which microbial contamination is
measured. Coliforms will be one of the first bacteria present in the water should
contamination occur, and they will be in much larger quantities than some pathogenic
microbes that may be present. Therefore, coliforms act as indicators of possible
contamination. In addition to total coliform being present in upgradient wells, the area
has been used for livestock management which could also be a contributor to its
presence. Because Dakota Aggregates will not be using the groundwater present in the
shallow or deep unconsolidated formations as a potable drinking water source, exposure
to total coliform through ingestion is unlikely.
• DRO: As AET noted in the annual report, DRO was detected slightly above the
laboratory reporting limits (typically near 0.10 mg/L) in all five wells sampled in April
2013 with concentrations that ranged from 0.11 to 0.29 mg/L. These low level DRO
concentrations may be an artifact fram well instal(ations which took place earlier in the
month. LBG does not have in its possession the April 2013 laboratory report which may
indicate laboratory issues with the results or provide further insight into the detections.
DRO was not detected in any of the well samples during the next three sampling events
(September and November 2013 and March 2014), nor is LBG in possession of the
laboratory reports associated with these events. In June 2014, DRO was detected slightly
above the reporting limit in RMW-3S (0.15 mg/L) and at 1.5 mg/L in RMW-4D. Due to
the location of RMW-4D in an active portion of the mining activities, the recent
appearance of DRO is not alarming but is of interest. At this time, it is recommended to
resample RMW-3S and RMW-4D for DRO and potentially conduct an additional DRO
analysis using the Silica-Gel Cleanup Method which may be able to differentiate between
petroleum products and naturally occurring organics. It is LBG's understanding that the
next sampling round is scheduled for November 2014.
• VOCs: Low concentrations of dichlorodifluoromethane (Freon 12, a refrigerant) have
been detected at various times in RMW-3D, RMW-4S, and RMW-SD at concentrations
that have ranged from l.l to 8.5 micrograms per liter (ug/L). The HRL for this
compound is 700 ug/L and does not appear to be cause for concern.
• Pesticides: As noted in AET's report, a-BHC, aldrin, desethylatrazine, and heptachlor
have been reported to be present in very low concentrations in samples collected from
LEGGETTE,BR�1SHEARS& GRAtIAM,INC.
Mr. Zweber 7 November 10, 2014
RWM-3S/D, RMW-4S/D, and RMW-SS/D. All of the detections were flagged (J value)
by the laboratory as being estimated concentrations that fell between the laboratory
method detection limits and the laboratory reporting limits. Of the four pesticides
detected, only heptachlor has an MCL (0.4 ug/L) and an HRL (0.08 ug/L). The only time
heptachlor was reported to be present was in March 2014 in the sample collected from
RMW-4D at a concentration of 0.014J which is less than the above MCL and HRL.
AET's tabulated summary of pesticide detections in the body of the report may be
misleading as the summed concentrations (0.030 to 0.191 ug/L) of all pesticide detections
for each well for each sampling event are at times in excess of heptachlor's HRL (0.08
ug/L). Table 3 in the report shows that RMW-4S and MW-B1-001 were analyzed for the
MDA List 2 Pesticides in June 2014 but two compounds (dinoseb and
pentachlorophenol) on this list were not analyzed. The laboratory reports also reflect
these two compounds were not analyzed.
• Statistical Analysis: Under Section 4.2 of the annual report, AET provides a table
summarizing statistical analyses conducted on general chemistry parameters that were
detected above reporting limits. The values in the Standard Deviation column for the
latter half of the table are the same as the values in the Maximum Concentration column.
This appears to be an oversight.
• General Comment: Tables in the body of the report refer to concentrations that are less
than the laboratory reporting limit as ND (non-detect). It would be helpful to the reader
if the laboratory reporting limit was referenced such as <5.0 ug/L or <0.1 mg/L etc. This
provides insight as to what magnitude positive detections are above and in relation to the
laboratory reporting limits.
Samplin� Frequency and Schedule
The WMP states a reduction in sampling frequency may take place after four consecutive
quarters of baseline sampling if the data so warrants. It also mentions that a number of select
compounds can be analyzed on an annual schedule if there are no detections during the baseline
sampling.
• Sampling Frequency: With the exception of RMW-3S, quarterly baseline sampling has
been completed for all wells and the monitoring program has moved into the routine
monitoring phase. This entails a reduction in sampling frequency from quarterly to semi-
annual along with the potential to reduce analyzing select compounds (SVOCs, MDA
List 2 Pesticides, and glyphosate) from semi-annually to annually. Due to the absence of
positive detections of 2,4- and 2,6-dinitrotoluene (SVOCs), MDA List 2 Pesticides, and
glyphosate, AET has recommended to analyze these compounds annually versus semi-
annually. At this time, LBG concurs with the recommendation. However, if any of these
compounds should be detected during an annual sampling event, the City should be
notified and a collective decision made regarding the sampling frequency. Groundwater
samples collected from RMW-3D, RMW-4D, and RMW-SS/D during June 2014 were
not analyzed for the above compounds as these wells were being sampled for the fifth
time and considered to be in the routine monitoring phase. It should be noted that these
same compounds were not analyzed in the June 2014 sample collected from RMW-3S
LEGGETTG,BRASHF,ARS& GRAHANI,INC.
Mr. Zweber 8 November 10, 2014
which has only been sampled two times. These compounds should be added back to the
(ist of parameters to be analyzed on a quarterly schedule until after the fourth round of
samples have been collected from this well and the laboratory results justify a reduction
in their sampling frequency. Justification to reduce the sampling frequency from
quarterly to semi-annually at RMW-4D is currently unclear due to the elevated DRO
detection in June 2014. The schedule will be reevaluated after the DRO results are
reported for the upcoming November 2014 sampling event. Other than the above
modifications, continued monitoring and sampling should be in accordance with the
WMP. In accordance with Resolution 2012-105 Item 36 (Interim Use Permit), Dakota
Aggregates shall provide the City notification of well sampling two weeks in advance of
the testing.
� Sampling Schedule: AET recommended establishing a semi-annual monitoring schedule
with groundwater samples being collected in the spring (April/May) and fall
(October/November). LBG concurs with this schedule as it allows for the collection of
groundwater samples during high water levels (spring thaw) and low water levels (fall
dry season) which may play a role in groundwater quality.
• Reporting Schedule: AET's annual report did not contain a due date for annual reporting.
The WMP states annual reports are due by March 1 of the year following the monitoring
year. However, Barr's September 2, 2014 (Attachment 1) written update to the City
states that annual reports will be due by September 30 of each year and shall summarize
results from the 3`d and 4th quarters of the previous year and the 1 St and 2°d quarters of the
current year. Based on the date of AET's report (September 26, 2014) it appears that the
reporting schedule recommended by Barr has been initiated.
CONCLUSIONS AND RECOMMENDATIONS
The following summarizes the 2013-2014 annual report review as it pertains to the WMP
and provides recommendations for future monitoring:
• Water levels should be measured in all wells on the same day and the time interval
between them minimized to get the most accurate groundwater elevation and flow
conditions during each monitoring event.
• Production well water levels should not be compared to those in the monitoring wells as
the wells are completed in different aquifers.
• Well 208404 has been removed from the monitoring program.
• Perched groundwater is present at RMW-3S and water levels at this location are not
representative of the shallow water table aquifer. Measurements from this well should
not be included in groundwater elevation mapping.
• The shallow and deep groundwater elevation contours indicate groundwater flow to the
northeast.
• Baseline sampling has been completed in all wells except RMW-3S due to the well being
dry or near dry during the monitoring events.
LEGGE"I'TE,BRASHEARS& GRAHAA7,INC.
Mr. Zweber 9 November 10, 2014
• Groundwater samples from RMW-3S should only be collected if the standing water
column in the well is equal to or greater than 2 feet unless consistent recharge occurs into
the well and the water appears representative of the perched water zone.
• Nitrate: Nitrate is the only compound detected that has exceeded an MCL and/or HRL.
Given the surrounding land use, nitrate exceedances appear to be from historical land use
and not associated with mining activities.
• Total coliform: Given the presence of total coliform in upgradient wells and historical
land use for livestock purposes, this compound does not appear to be a result of adverse
mining operations.
• Pesticides: Although estimated concentrations of four pesticides were reported by the
laboratory, only heptachlor has an MCL and HRL, both of which have not been
exceeded.
• VOCs: The laboratory has reported the presence of dichlorodifluoromethane (Freon) in
samples collected from upgradient and downgradient wells. The concentrations have
been well below the HRL and its presence does appear to be of concern at this time.
• DRO: DRO was present at an elevated concentration in the June 2014 RMW-4D
groundwater sample. It is recommended to resample this well for the standard WI DRO
Method listed in the WMP and potentially for DRO using the Si(ica Gel Cleanup Method
which may be able to differentiate between petroleum organics and naturally occurring
organics.
� Due to the lack of glyphosate, 2,4- and 2,6-dinitrotoluene (SVOCs), and MDA List 2
Pesticides, LBG concurs with AET's recommendation to analyze these compounds on an
annual basis versus semi-annually. RMW-3S should continue to be sampled for these
compounds on a quarter(y schedule until the four baseline rounds of sampling have been
completed.
• Since the mining facility will not be using groundwater from the unconsolidated
formations for potable purposes, the nitrate and total coliform concentrations in
groundwater do not appear to be a threat to the health and safety of the workers in the
mining area.
• Currently, annual re�orts will be due September 30 and will summarize monitoring
activities from the 3` and 4t" quarters from the previous year and the lst and 2°d quarters
of the current year.
• Pending the groundwater analytical results for the proposed November 2014 groundwater
sa�npling event, the sampling schedule should be reevaluated for justification to reduce
the sampling frequency from quarterly to semi-annually.
• Based on review of the 2013-2014 annual report, it appears that the conditions of the
WMP have been met.
• Al( other monitoring activities shall continue to be conducted in accordance with the
WMP.
LEGGETTE,BRASHEARS& GF2:1HAN1,INC.
Mr. Zweber ]0 November 10, 20 l4
LBG appreciates the opportunity to assist the City on this project. Please contact us if
you have any questions or comments regarding the content of this report.
Sincerely,
LEGGETTE, BRASHEARS & GRAHAM, INC
"�"��
David V. Strand, PG
Senior Hydrogeologist
l
David S. Hume, PG
Senior Associate
DVS: ds
S:\Tech\WSB-UMore Rosemount\UMore LBG Update 2014-1 I-10\UMore 2013-2014 Annual Report Review Draft dvs 2014-1 I-IO.doc
LEGGE"I'TE,BRASHEARS& GRAHAM,INC.
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Figure 1
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�UMore Park Boundary O SITE LOCATION
N Hydrogeologic Study and
Water Monitoring Plan
UMore Mining Area
o s,000 s,000 �z,000 Rosemount, MN
Feet
Sour�e: MnDOT,MN DNR,Dakota County,Barr,SEH,HKGi. -
USGS topographic map backgmuntl drnvnloatletl fmm the US. �A�R
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SOURCE:HYDROGEOLOGIC STUDYAND WATER MONITORING PLAN,UMORE MINING AREA,DAKOTA COUNTY,MINNESOTA,BARR,SEPTEMBER 2012
P�ePa�edBy: UMORE MINING AREA
"� }� LEGGETTE,BRASHEARS&GRAHAM,INC.
I'B �� Pro£essionalGroundwaterand R�SEM�UNT,M�NNESOTA
� � Environmental Engineermg Sernces
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NSL auoZ Wlfl£86L OVN'Wd 94�69�16 VLOZtiC;JI F .� �.0;,;:«�nqsro��6�sdec����.inowasob-3210Wf1-8SM\SI`J\�`J
ATTACHMENT 1
Barr September 24,2014 Correspondence to the City of Rosemount
Update to the SAP and WMP
LEGGETTF„BRASHEARS& GRAHAAR,INC.
resourceful. naturally. BA�.�
engineering and environmental consultants
�I�IM�
September 2,2014
Mr. Eric Zweber
Senior Planner
City of Rosemount
2875 145`�' St. W
Rosemount, Minnesota 55068
Re: Update to the Sampling and Analysis Plan, Phase 11 Environmental Investigation, SOCs 1-3
and 6-8, UMore Mining Area, Dakota County, Minnesofa and Hydrogeologic Study and
Water Monitoring Plan, UMORE Mining Area, Dakota Counfy, Minnesota
Dear Mr.Zweber:
This update has been prepared to document addenda to the MPCA-approved Sampling and Analysis Plan,
Phase 11 Environmental Investigation, SOCs 1-3 and 6-8, UMore Mining Area, Dakota County,
Minnesota(SAP; Barr, 2009)and the Hydrogeologic Study and Water Monitoring Plan(WMP; Barr,
2012) for the UMore Mining Area(UMA) located in the City of Rosemount, Dakota County, Minnesota.
Background
A SAP was required as a condition of Dakota Aggregates' mining permit. However,the SAP was
originally developed for the Phase II Environmental Investigation(Phase II)at UMore Park which was
conducted at the location now occupied by Dakota Aggregates' mining and ancillary activities. The
purpose for sampling at Dakota Aggregates' mining facility differs from the purpose of Phase II sampling
(as described in the WMP and Phase lI Work Plan, respectively). Therefore certain components of the
SAP are not applicable to the sampling program described in the WMP. The modifications described
herein which pertain to the SAP consist of changes to the parties responsible for conducting sample
analysis and sampling activities, also includes changes to the parameter list to reflect concerns specific to
Dakota Aggregates' mining and ancillary activities raised by the City of Rosemount.
The WMP was developed prior to the start of Dakota Aggregates' mining activities. During
implementation of the WMP,the discovery of additional information dictated changes to the well network
(as described in correspondence from Barr Engineering and LBG during 2013). Modifications which
pertain to the WMP consist of changes to the wells used for monitoring in addition to modifications to the
reporting schedule(as discussed in communications between Barr Engineering and the City of
Rosemount in 2013).
Description of Modifications to the SAP
The following sections describe modifications to the SAP. Changes are listed according to section number
in the SAP document.
__..__ _ __ __ _ __.____._ __.
Barr Engineering Co. 4700 West 77�h Street, Suite 200, Minneapolis, MN 55435 952.832.2b00 www.barr.com
_
____..
Mr.Eric Zweber
September 2,2014
Page 2
Secfions 2.2, 2.3, and 2.4 Scope of Work,Schedule, and Phase II Investigation Report
These sections are not applicable to Dakota Aggregates' activities. The scope of work, schedule, and
reporting requirements for sampling at Dakota Aggregates' facility in the City of Rosemount are
described in the WMP.
Section 3.1 -Dakota Aggregate Responsibilifies
Dakota Aggregates is responsible for overall implementation of the WMP. Dakota Aggregates' Project
Manager is Pat Mason.
Secfion 3.2-American Engineering Testing, Inc. Responsibilities
American Engineering Testing, [nc, and its staff are responsible for the duties described in this section,
with the exception of the official approved SAP. Barr is responsible for MPCA-approved SAP developed
for the Phase ll investigation at UMore Park. Copies of this approved SAP Update will be distributed to
Dakota Aggregates,AET, and the City of Rosemount by Barr. Upon its approval by the City of
Rosemount,AET will be responsible for managing and controlling this Update to the SAP.
Section 3.3-Contract Laboratory Responsibilities
The Laboratory Providers outlined in the table below will be responsible for analysis of the majority of
samples for this investigation. The laboratory project managers will oversee sample analysis, data
validation and quality assurance activities at each laboratory.
Laborato Name Pro'ect Mana er Anal ses
Pace Analytical Services, Inc. Lori Castille Total coliform, organochlorine pesticides,
-Minneapolis, MN total phosphorus,total cyanide, bicarbonate
and carbonate alkalinity, chloride, nitrate+
nitrite as N, sulfate, TDS,metals, VOCs,
SVOCs and WI DRO
Eurofins Eaton Analytical- Jessie Varab Glyphosate
South Bend, IN
Environmental Chemistry Jessica Esser MDA list 1 and 2 pesticides
Consulting Services(ECCS)-
Madison, MN
The Pace and Eurofins' analyses are accredited though the Minnesota Department of Health's(MDH)
Enviromnental Laboratory Certification Program(when applicable for the target analytical list in Table
1). ECCS is approved by the Minnesota Department of Agriculture (MDA)for MDA List 1 and 2
pesticide analysis. Copies of the Laboratory Provider's accreditations are on file with each Laboratory
Provider.
Section 3.4-Regulating Agency Responsibilities
The City of Rosemount and its staff have overall regulatory responsibility for this project. The MDNR
has regulatory oversight of the Water Appropriations Permit for the project.
P:\Mpls\23 MNU 9\23191101 Dakota Aggregates UMA Permitti\WorkFiles\GW Monitoring Plan\SAP Update_Aug 2014\UMA SAP Update-
2Sept2014.docx
Mr.Eric Zweber
September 2,2014
Page 3
Section 4.2-Field Investigation Tasks
This section is not applicable to Dakota Aggregates' activities. The scope of work, schedule, and
reporting requirements for sampling at Dakota Aggregates' facility in the City of Rosemount are
described in the WMP.
Secfion 4.3.1 -Sampling Labeling and Numbering
Monitoring wells installed specifically for the purpose of monitoring groundwater in the vicinity of
Dakota Aggregates' mining facility are represented with the prefix"RM W".
Section 5.6 -Decontamination, Storage, and Transport of Equipmenf
Following the Alconox wash, all non-disposable field equipment will be rinsed with a bleach solution.
Submersible pumps will be disassembled prior to washing with Alconox and bleach. The bleach rinse and
disassembly of the pumps will be discontinued if sampling for total coliform bacteria is discontinued.
Table 2 -Analyfical Paramefers, Mefhods, and Reporting Limifs
This table is not applicable to Dakota Aggregates' activities and has been replaced with Table 1
(attached).
Table 3 -Sample Preservation and Holding Times
Water samples for total coliform bacteria should be collected in a sterilized container, preserved with
sodium thiosulfate, packed on ice and chilled to 4°C at the time of collection.
Description of Modifications to the WMP
The following sections describe modifications to the WMP. Changes are listed according to section
number in the WMP document.
Section 5.1.1 -Monitoring Well Locafions
Well RMW-4 has been renamed RMW-4d. RMW-4s has also been added to the monitoring program.
MW-C2-202 and MW-C2-002 have been abandoned. We11208404 has been removed from the
monitoring program.
Secfion 5.1.3.6-Other Wells
Well RMW-Ss has a 20-foot screen.
Section 7.1-Reporfs
Reports will be submitted by September 30 each year. The annual report will summarize results from the
previous year. It will include data from the 3`d and 4`h quarters of the previous year and from the ls`and
2°a quarters of the current year. For the first annual monitoring report due September 30, 2014, data from
the 2"d quarter of 2013 will also be included. Reports for subsequent years will follow the established
schedule.
References
Barr, 2009. Sampling and Analysis Plan, Phase II Investigation, SOCs 1-3 and 6-8, UMore Mining Area,
Dakota County, Minnesota, May 2009.
P:Uvtpls\23 MN\19\23191101 Dakota Aggregates UMA Permitti\WorkFiles\GW Monitoring Plan\SAP Update_Aug 2014\UMA SAP Update-
2Sept2014.docx
Mr.Eric Zweber
September 2,2014
Page 4
Barr, 2012. Hydrogeologic Study and Water Monitoring Plan,UMore Mining Area, Dakota County,
Minnesota, September 2012.
Attachments
Table 1 —Analytical Parameters, Methods and Reporting Limits
Please contact Pat Mason at Dakota Aggregates if you have any questions.
Sincerely,
Ellen Considine, P.G.
P:\Mpls\23 MN\19\23191 101 Dakota Aggregates UMA Pemiitti\WorkFiles\GW Monitoring Plan\SAP Update_Aug 2014\UMA SAP Update-
2Sept2014.docx
Table 1
Analytical Parameters,Methods and Reporting Limits
SAP Update
UMore Mining Area
Rosemount,Minnesota
Method(EPA Method
Proposed CAS Number unless noted Detection Limit Reporting Limit Test Unit
otherwise)
Glyphosate(Eurofins Eaton Analytical�
Glyphosate 1071-83-6 ' 547 � - '� 6A I ug/L
Microbiology�Pace-MPLS)
Total Coliform(by Membrane Filtration) I TCOL SM 9222 B I Not Applicable � 1 j CFU
Organochlorine Pesticides(Pace)
4,4'-DDD 72-54-8 8081 B 0.025 0.1 ug/L
-- -- - --- � --._...___ _.._..
4,4'-DDE 72-55-9 8081B 0.033 0.1 ug/L
4,4'-DDT 50-293 8081B 0.022 0.1 ug/L
a-Chlordane 5103-71-9 8081B 0.01 0.05 ug/L
Aldrin 309-00-2 8081B 0.009 0.05 ug/L
alpha-BHC 319-84-6 80818 0.01 0.05 ug/L
beta-BHC 319-85-7 8081B 0.012 0.05 ug/L
delta-BHC 319-86-8 80818 0.009 0.05 ug/L
Dieldrin 60-57-1 80818 0,016 0.1 ug/L
Endosulfan I 959-98-8 8081B 0,021 0.05 ug/L
Endosulfan II 332�3-65-9 8081B 0.027 0.1 ug/L
Endosulfan sulfate 1031-07-8 80818 0.024 0.1 ug/L
Endrin 72-20-8 80818 0.016 0.1 ug/L
Endrinaldehyde 7421-93-4 8081B 0.02 0.1 ug/L
Endrin ketone 53494-70-5 8061B 0.041 0.1 ug/L
gamma-BHC(Lindane) 58-89-9 80816 0.009 0.05 ug/L
gamma-Chlordane 556634-7 8081B 0.009 0.05 ug/L
Heptachlor 76-44-8 80816 0.01 0.05 ug/L
Heptachlorepoxide 1024-573 80818 0.01 0.05 ug/L
Methoxychlor 72-43-5 80818 0.147 0.5 ug/L
Toxaphene 8001-35-2 8081B 075 1.5 � ug/L
MDA List 7 Pesticides(ECCS)
EPTC 759-94-4 8270D 0.048 0.50 ug/L
- --- ----._.- ._--
Propachlor 1918-16-7 8270D 0.017 0.50 ug/L
Ethalfluralin 55283-68-6 8270D 0.10 0.50 ug/L
Deisopropylatrazine 1007-28-9 8270D 0.041 0.50 ug/L
Trifluralin 1582-09-8 8270D 0.013 0.50 ug/L
Desethylatrazine 6190-65-4 8270D 0.014 0.50 ug/L
Phorate 298-02-2 8270D 0.046 0.30 ug/L
Prometon 1610-18-0 8270D 0.062 0.50 ug/L
Simazine 12234-9 8270D 0.037 0.50 ug/L
Atrazine 1912-24-9 8270D 0.032 0.50 ug/L
Propazine 139-00-2 8270D 0.051 0.50 ug/L
Terbufos 13071-79-9 8270D 0.025 020 ug/L
Fonofos 944-22-9 8270D 0.025 0.50 ug/L
Triallate 2303-17-5 8270D O.D47 0.50 ug/L
Metribuzin 21087-64-9 8270D 0.026 0.50 ug/L
Dimethenamid 87674-68-8 8270D O.D18 0.50 ug/L
Acetochlor 34256-82-1 8270D 0.037 0.50 ug/L
Alachlor 15972-60-8 8270D O.D38 0.50 ug/L
Cyanazine 21725-46-2 8270D 0.072 020 ug/l
Metolachlor 51218-45-2 8270D 0.022 0.50 ug/L
Chlorpyrifos 2921-88-2 8270D 0.043 0.50 ug/L
Pendimethalin 40487-42-1 8270D 0.030 0.50 ug/L
MDA List 2 Pesticides(ECCS)
Dicamba 1918-00-9 8151A 0.032 0.50 ug/L
MCPA � � 94-74-6 8151A 0.048 0.30 ug/L
2,4-D 94-75-7 8151A 0.068 0.50 ug/L
Triclopyr 55335-063 8151A 0.058 0.50 ug/L
Pentachlorophenol 87-86-5 8151A - NotAnalyzed ug/L
2.4.5 TP 93-72-1 6151A 0.040 0.50 - . ..-- uglL �---�
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Table 1
Analytical Parameters,Methods and Reporting Limits
SAP Update
UMore Mining Area
Rosemount,Minnesota
Method(EPA Method
Proposed CAS Number unless noted Detection Limit Reporting Limit Test Unit
otherwise
2,4,5-T 93-76-5 i 8151A 0.042 i 0.50 ug/L
--.._ _--- - ----- ------ --
Dinoseb 88-85-7 � 8151A - ; NotAnalyzed , ug/L
2,4-DB 94-82-6 8151A 0.035 0.50 ug/L
Benlazon 25057-89-0 8151A 0.029 0.50 ug/L
Picloram 2/1/1918 8151A 0.053 0.50 ug/L
Generel Chemistry(Pace)
Alkalinity,Bicarbonate as CaCO3 71-523 SM 2320 B � 2.5 � 5 mg/L
Alkalinity,Carbonale as CO3 72608-12-9 � SM 2320 B ' 2.5 5 mg/L
Chloride 16887-00-6 SM 4500 CI-E 0.5 1.0 mg/L
Cyanide,total 57-12-5 SM 4500-CN-E 0.005 0.010 mg/L
Nitrate+Nitrite as N N+N SM 4500 NO3-H 0.1 0.2 mg/L
Phosphorus,Total 7723-14-0 SM 4500 P-E 0.0250 0.05 mg/L
Solids,Total Dissolved TDS SM 2540 C 5 10 mg/L
Sulfate 14808J9-8 ASTM D516 t25 '� 2.50 I mg/L
Metals'(Pace)
Arsenic,dissolved 744038-2 6020A 025 0.5 ug/L
Beryllium,dissolved 7440-41-7 6020A 0.066 02 ug/L
Calcium,dissolved 7440-70-2 6020A 8.385 40 ug/L
Copper,dissolved 7440-50-8 6020A 0216 1 ug/L
Iron,dissolved 7439-89-6 6020A 8.015 50 ug/L
Lead,dissolved 7439-92-1 6020A 0.046 0.1 ug/L
Magnesium,dissolved 7439-95-4 6020A 2.846 10 ug/L
Potassium dissolved 9!7/7440 6020A 8.342 50 ug/L
Sodium,dissolved 7440-23-5 6020A 1824 50 ug/L
Thallium,dissolved '� 7440-28-0 6020A 0.025 0.1 ug/L
Mercury(Pace)
Mercury,dissolved 7439-97� 7470 0.026 0.2 ug/L
VOCs(Pace)
1,1,1,2-Tetrachloroethane 630-20-6 I 8260 0.5 1 �'� ug/L
-- - ----- --- -__ ..---- -_ ._.
1,1,1-Trichloroethane ' 71-55-6 �i 8260 0264 ' 1 ' ug/L
1,1,2,2-Tetrachloroethane 7934-5 8260 0.5 1 ug/L
1,1,2-Trichloroethane 79-00-5 6260 0.127 1 ug/L
1,1,2-Trichlorotrifluoroethane 76-13-1 8260 0.5 1 ug/L
t,t-Dichloroethane 75-34-3 8260 0.159 1 ug/L
t,t-Dichloroethene 7535-4 8260 0.199 1 ug/L
1,1-Dichloropropene 563-58-6 8260 0.5 1 ug/L
1,2,3-Trichlorobenzene 87-61-6 6260 0.5 1 ug/L
1,2,3-Trichloropropane 96-18-4 6260 1.22 4 ug/L
1,2,4-Trichlorobenzene 120-62-1 8260 0.5 1 ug/L
1,2,4-Trimethylbenzene 95-63-6 8260 0.5 1 ug/L
1,2-Dibromo3-chloropropane 96-12-8 8260 2 4 ug/L
1,2-Dibromoethane(EDB) 106-93-4 8260 0.148 1 ug/L
1,2-Dichlorobenzene 95-50-1 8260 0.16 1 ug/L
1,2-Dichloroethane 107-06-2 8260 0.131 1 ug/L
1,2-Dichloropropane 78-87-5 8260 0.142 4 ug/L
1,3,5-Trimethylbenzene 108-67-8 8260 0.5 1 ug/L
1,3-Dichlorobenzene 541-73-1 8260 0.5 1 ug/L
1,3-Dichloropropane 142-26-9 8260 0.5 1 ug/L
1,4-Dichlorobenzene 106-46-7 8260 0.5 1 ug/L
2,2-Dichloropropane 594-20-7 8260 0.174 4 ug/L
2-Butanone 78-93-3 8260 2.5 5 ug/L
2-Chlorotoluene 95-49-8 8260 0.138 1 ug/L
4-Chlorotoluene 106-43-4 8260 0.083 1 ug/L
Acetone 67-64-1 8260 10 20 ug/L
Allyl chloride 107-05-1 8260 0.446 4 ug/L
Benzene 71-43-2 8260 0.15 1 ug/L
P:\Mpls\23 MN\39\23191101 Dakota Aggregates UMA Permitti\Workfiles\GW Moni[oring Plan\SAP Upda[e_lune 2014\Table 1 SAP_26Aug2014.z1sx 2 of 3
Tabie 1
Analytical Parameters,Methods and Reporting Limits
SAP Update
UMore Mining Area
Rosemount,Minnesota
Method(EPA Method
Proposed CAS Number unless noted Detection Limit Reporting Limit Test Unit
otherwise
Bromobenzene 108-86-1 8260 0.132 1 ug/L
Bromochloromethane 74-97-5 8260 0.115 1 I uglL
Bromodichloromethane 75-27-4 8260 0.202 1 ug/L
Bromoform 75-25-2 8260 2 4 ug/L
Bromomethane 74-83-9 8260 2 4 ug/L
Carbon tetrachloride 56-23-5 8260 0.159 1 ug/L
Chlorobenzene 108-90-7 6260 0.066 1 ug/L
Chloroethane 75-00-3 8260 0241 1 ug/L
Chloroform 67�63 8260 0.161 1 ug/L
Chloromethane 74-873 8260 0.341 4 ug/L
cis-1,2-Dichloroethene 156-59-2 6260 0.133 1 ug/L
cis-1,3-Dichloropropene 10061-01-5 6260 0.127 4 ug/L
Dibromochloromethane 124-48-1 8260 0.5 1 ug/L
Dibromomethane 74-95-3 8260 0.185 4 ug/L
Dichlorodifluoromethane 75-71-8 8260 0.5 1 ug/L
Dichlorofluoromethane 75�3� 8260 0202 1 ug/L
Ethyl ether 60-29-7 8260 0.141 4 ug/L
Ethylbenzene 100-41-4 8260 0.165 1 ug/L
Hexachlorobutadiene 87-683 8260 0.5 1 ug/L
Isopropylbenzene 98-82-8 8260 0.5 1 ug/L
10838-3
m,p-Xylene 8260 0.31 2 ug/L
106-023
Methyl isobutyl ketone 108-10-1 8260 2.5 5 ug/L
Methyl tert-butyl ether 1634-04-0 8260 0.169 1 uglL
Methylene chloride 75-09-2 8260 2 4 ug/L
Naphthalene 91-203 6260 2 4 ug/L
n-Butylbenzene 104-51-8 8260 0.5 1 ug/L
n-Propylbenzene 103-65-1 8260 0.5 1 ug/L
o-Xylene 95-47-6 8260 0.094 1 ug/L
p-ISOprapyltoluene 99-87� 8260 0.5 1 ug/L
sec-Butylbenzene 135-98-8 8260 0.5 1 ug/L
Styrene 100-42-5 8260 0.063 1 ug/L
tert-Butylbenzene 98-06-6 8260 0.5 1 ug/L
Tetrachloroethene 127-18-4 6260 0.157 1 ug/L
Tetrahydrofuran 109-99-9 8260 1.99 10 ug/L
Toluene 108-88-3 6260 0.11 1 ug/L
trans-1,2-Dichloroethene 156-60-5 6260 0231 1 ug/L
trans-1,3-Dichloropropene 10061-02� 6260 0.185 4 ug/l
Trichloroethene 79-01F 6260 0.091 0.4 ug/L
Trichlorofluoromethane 75-69-4 6260 0216 1 ug/L
--- �-- ----- — -......— -----
Vinyl chloride 75-01-4 8260 0.082 �0.4 . ug/L
Diesel Range Organics(Pace)
Diesel Range Organics(C10-C28) �i DRO WI DRO � 21 100 ug/L
SVOCs(Pace)
2,4-dinitrotoluene 121-14-2 8270 �.04 10 ug/L
2,6-dinitrotoluene 606-20-2 8270 1.01 10 ug/L
Notes:
" Surface water samples will be comparetl to groundwater standards and will be field fltered with a 0.45 micron f Iler and analyzed for dissolved metal constituents.
CFU=Colony Forming Units
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Fredrikson & Byron 10/21/2014 9: 10 ; 33 AM PAGE 1/001 Fax Server
JULIE TAYLOn
14425 Atwater We,
I�osemonni, Minnesota 55068
October 21,2014
City of Rosemount Planning Commission
2875 145th 5treet West
Rosempunt, MN 55068
Re: Application by Dakota Aggregates, LLC for Renewal of Extraction Permit and
amendment of Interim Use Permit to allow for 24 hour operation
Public Hearing on October 28,2014
To Whom it May Concern;
1 received a capy of the Public Hearing Notice regarding the application by Dakota Aggregates,
LLC for renewal of their Extraction Permit and for amendment to the existing Interim Use
Permit ta allow for 24 hour operation of the aggregate processing facility, which will be
discussed at a hearing on Tuesday,October 28,2014,
I will be unable ta attend that public hearing, but would like the Planning Commission to note
my objections. I am concerned about air and naise pollution from such a project in such close
proximity to my property, particularly any 24 haur operation of the facility. I am also concerned
about the patential threat to wildlife habitats. We have observed eagles, pheasants and
turkeys in the area surrounding our property and objed to any project that wouid threaten the
habitats of these animals.
If the applicant has done apprapriate the environmental assessments, I would be interested in
the results and you may email them to me at 'ta iar fr�dlaw,carri. If such assessments have
not been undertaken, I strangiy encourage the Planning Commission to insist that such
environmental due diligence is engaged in priorto approving any project of this type.
Sincerely,
44 ,.i._« �+ .•,;;f �
.. ..
, .
,,...� .
. t.. .
_,....r........................._,.,,.., ,.....,..,..,.,.,,.....,.,,.:...,,:.,,.
Julie A.Taylor
jfi�yla.r�a�f red I�w..cnm
tc: Anna Wills-57B - MN House
Greg Ciausen- 57 -MN Senate
John K1ine-2 -U.S.House
Amy K1oUuchar-U.S. Sen�te
Al Franken-U.S. Senate
October, 20, 2014
Rosemount Planning Commission
2875 145`h Street West
Rasemount,MN 55068
Planning Commission,
We are responding to the two "Public Hearing Notices"that we received.
Wi�h regard to the notice regarding the Dakota Aggregates,LLC for a�n amendment to the
In�erim Use Permit to allow 24 hour operation of the aggregaCe processing faaility. We
are AGAINST this amendment. The 24 hour operation was a huge concern for residents
during the initial request. The residents/city and Dakota Aggregates,LLC agreed at that
time that there would NOT be 24 hour operation. A11 involved need to keep their initial
word. I can't imagine having to hear all the equipment, noise,e#c. 24 hours a day,
especially stunnier tirne in MN when we like to have our windows open and also all#he
huge lights sending ligilt into all the nearby homes. Please do NOT allow Dakota
Aggregate 24 hours operatian.
With regard to fhe notice regarding Hardrives, Inc. for an interim use permit to locate an
asphalt productian plarit on the UMore Park property,we believe th�t a plant of this
nature with its constant smells and toxins released into�ze air,would not be gaod to have
that close to people/homes. The praposed area is to close to people and homes, We are
totally AGAINST allowing this facility sa close to our homes. Can they guarantee NU
asphalt smells and NO toxins going into the air? We don't need to be subjected to any
more toxins.
Please talce ot�r concerns as t�paying citizens of Rosetnotmt into consideration.
Thank you, ;
��N�
Robert Pryor '
i`
�
, r(-2— /
Ruth Pryor
14755 Bloomfield Circle
Rosemount, MN 55068
EXCERPT OF DRAFT MINUTES
PLANNING COMMISSION REGULAR MEETING
OCTOBER 28, 2014
6.d. Request by Dakota Aggregates to Renew their Large Scale Mineral Extraction
Permit through 2015 and to Renew their Aggregate Processing Interim Use Permit
through 2019. (14-53-ME and 14-58-IUP). Dakota Aggregates has applied for the
annual renewal of their large scale mineral extraction permit and renewal of their
aggregate process interim use permit on the UMore property. Their requests include
expanding the mining and aggregate processing to 24 hours a day. For 2015, Dakota
Aggregates is proposing to continue mining the same south mining area adjacent to
County Road 46 and Station Trail and the same north mining area about '/4 mile south
of County Road 42.
Commissioner Forster wanted clarification on whether the 24 hour production would be
for the north operations only or both north and south. Ms. Lindquist stated it is for both
sites. He inquired as whether the north access road is being used currently. Ms.
Lindquist stated it is being used for sand hauling activity. Commissioner Forster wanted
to know if there are any concerns with additional traffic on Akron Ave and if lights would
be installed. Ms. Lindquist stated that there is a likelihood that volume would increase,
and a light is slated for that intersection in future, when warrants are met.
Commissioner Kenninger inquired as to when the applicant would do the additional
berming in northern area and if there is a requirement for the berming. Ms. Lindquist
stated that a condition could be added regarding completion of the northern berm.
Commissioner Kenninger wondered what would happen if issues arise seeing that the
north side is closer to residents. Ms. Lindquist stated that staff would work with applicant
on how to best correct the problem.
Commissioner Kurle would like the applicant to explain mining process and any noise
associated with night mining.
Commissioner Miller inquired as to whether or not at any point if staff got a quality
assurance plan. Ms. Lindquist stated that yes a report from Barr Engineering was
received within last month. Commissioner Miller would like the applicant to address the
quality concerns.
The public hearing was opened at 7:30 pm.
Public comments:
Kent Layman, 14515 Bloomfield Path, Rosemount, is a board member of the Enclave
association. He stated that most residents have accepted that the mine is there. He said
that lights can be seen at 10:00 pm and the berms help reduce lights and noise some.
He is concerned about the 24 hours of operation and the noise and lights associated
with those operations. Ms. Lindquist encouraged citizens to call the police if they have
any problems. That way staff can address any issues that arise before renewal with
applicant.
MOTION by Kenninger to close the public hearing. Second by Forster.
Ayes: 5. Nays: 0. Motion Passes.
The public hearing was closed at 7:33 pm.
Additional Comments
Commissioner Miller encouraged staff and the Council to review current ordinances on
noise and light. He also stated that he wants to protect applicants and citizens. He also
encouraged residents to bring concerns forward so they can be addressed.
Commissioner Forster asked for further clarification on 3�d page of staff report relating to
the 24/7 hours of operation. It stated that the extra hours would be for 5 MnDot projects.
Ms. Lindquist clarified that mining can be done 24 hours a day but hauling is only during
their regular business hours.
Commissioner Kenninger attended Dakota Aggregates' open house; they are open to
working with the city and residents. Dakota Aggregates presented what they are doing
with lighting and dust control at the open house. She encouraged that everyone work
together to handle complaints. She supported a condition to require the northern berm
be finished. Shaun Dahl with Dakota Aggregates stated it is their intent to build the
east/west berm this summer. They understand importance of the berm.
MOTION by Kenninger to recommend that the City Council renew the Dakota
Aggregates Large Scale Mineral Extraction Permit for 2015, subject to the terms and
conditions in the attached 2015 Draft Conditions for Mineral Extraction. With addition of
item II. Requiring installation of the northern berm to be completed by the next annual
review, and also amend to also include "and screening" in section D
Second by Kurle
Ayes: 5. Nays: 0. Motion approved.
MOTION by Kenninger to recommend the City Council renew the Aggregate Processing
Interim Use Permit through 2019, subject to the terms and conditions in the attached
draft Interim Use Permit Resolution.
Second by Forster
Ayes: 5. Nays: 0. Motion approved.
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