Exhibit G Monitoring Locations and SeepCoordinates.pdf
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- Attached to
- Captain Jack Mill Superfund Site O & M
- Solicitation number
- RFP FAAA 2026000184 4
- Issued by
- Denver County, Denver City, Colorado
About this file
Exhibit G: Monitoring Locations and Seep Coordinates for Captain Jack Mill Superfund Site
This document is a monitoring locations exhibit prepared for the Captain Jack Mill Superfund Site Operations & Maintenance project in Colorado, establishing a comprehensive sampling framework across multiple site locations. The exhibit identifies 21 distinct monitoring locations categorized by sample type, including groundwater wells, mine pool locations, surface water stations, and seeps. Groundwater monitoring encompasses four designated monitoring wells (MW1-MW4), two Colorado Department of Transportation (CDOT) right-of-way locations (ROW1 and ROW2), three dew drops (DD1-DD3), and two midway stations (MID1-MID2). Surface water monitoring includes eleven designated surface water sampling stations (SW-01 through SW-11) plus a treatment plant outfall location, while treatment plant influent sampling points are also specified for grab samples. The sampling methodology incorporates field data collection and grab samples at designated intervals.
Seep monitoring represents a critical component of the site characterization, with 21 identified seeps (Seep-01 through Seep-21) precisely located using latitude and longitude coordinates within the Captain Jack Mill area. The seeps are distributed across the site vicinity, with coordinates ranging approximately from latitude 40.0624901 to 40.0653218 and longitude -105.5203392 to -105.5119602. This structured monitoring framework provides the baseline data infrastructure necessary for ongoing operations and maintenance activities at the superfund site, enabling systematic tracking of groundwater, mine pool, and surface water conditions across all identified discharge and seepage points.
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Text version
Location Tag Sampling Method
CDOT ROW #1 CJM-GW-ROW1
Dew Drop #1 CJM-GW-DD1 Dew Drop #2 CJM-GW-DD2
Monitoring Well #1 CJM-GW-MW1 Monitoring Well #2 CJM-GW-MW2
Monitoring Well #3 CJM-GW-MW3 Monitoring Well #4 CJM-GW-MW4
CDOT ROW #2 CJM-GW-ROW2 Field Data CDOT ROW #2 CJM-GW-ROW2 Grab Sample
Dew Drop #3 CJM-GW-DD3 Grab Sample
Sample Port #1 CJM-GW-SP1
Midway #1 CJM-GW-MID1 Midway #2 CJM-GW-MID2 Niwot #1 CJM-GW-NIW1 Niwot #2 CJM-GW-NIW2
Niwot #3 CJM-GW-NIW3
Treatment Plant Influent CJM-GW-TPI Grab Sample
Treatment Plant Influent CJM-GW-TPI Grab Sample Treatment Plant Outfall CJM-SW-TPO
Surface Water #1 CJM-SW-01
Surface Water #2 CJM-SW-02 Field Data Surface Water #2 CJM-SW-02 Grab Sample Surface Water #3 CJM-SW-03 Surface Water #4 CJM-SW-04
Surface Water #5 CJM-SW-05 Surface Water #6 CJM-SW-06 Field Data
Surface Water #6 CJM-SW-06 Grab Sample Surface Water #7 CJM-SW-07
Surface Water #8 CJM-SW-08 Surface Water #9 CJM-SW-09
Surface Water #10 CJM-SW-10 Field Data
Surface Water #10 CJM-SW-10 Grab Sample
Surface Water #11 CJM-SW-11
Seeps CJM-SW-SEEP-##
Notes:
Captain Jack Mill Sampling Locations Sample Type
Groundwater
Mine Pool
Surface Water
Not Regularly Sampled Groundwater Location Mine Pool Location Surface Water Location
Seep Number Latitude Longitude Seep-01 40.0642949 -105.5182236 Seep-02 40.0649968 -105.5204100 Seep-03 40.0649247 -105.5204212 Seep-04 40.0649341 -105.5203392 Seep-05 40.0629228 -105.5127373 Seep-06 40.0629646 -105.5134646 Seep-07 40.0647052 -105.5130672 Seep-08 40.0647403 -105.5132903 Seep-09 40.0647485 -105.5134662 Seep-10 40.0626721 -105.5144648 Seep-11 40.0624901 -105.5151386 Seep-12 40.0646027 -105.5119602 Seep-13 40.0646856 -105.5122516 Seep-14 40.0647795 -105.5126418 Seep-15 40.0647737 -105.5127432 Seep-16 40.0629948 -105.5126337 Seep-17 40.0648758 -105.5130843 Seep-18 40.0652322 -105.5135469 Seep-19 40.0647781 -105.5130261 Seep-20 40.0653218 -105.5136070 Seep-21 40.0648031 -105.5135194
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