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2019-10-24_REVISION - M1977300
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2019-10-24_REVISION - M1977300
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Last modified
12/27/2024 1:33:13 PM
Creation date
10/25/2019 12:18:35 PM
Metadata
Fields
Template:
DRMS Permit Index
Permit No
M1977300
IBM Index Class Name
REVISION
Doc Date
10/24/2019
Doc Name
Request for Technical Revision
From
Colorado Legace Land
To
DRMS
Type & Sequence
TR29
Email Name
AME
MAC
Media Type
D
Archive
No
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COLORADO LEGACY LAND <br /> TABLE 1. GROUNDWATER SAMPLE LOCATIONS IN ALLUVIAL EXCAVATION AREA <br /> Location ID/ Installation Easting i Northing I Ground Surface Total Well Screened Lithology Summary <br /> Elevation Depth Construction Interval Field Notes Recommendation <br /> Sample ID Date (ft) (ft) (ft amsl) (ft bgs) Details (ft bgs) (ft bgs) <br /> 2.5-inch,Sch (0-3)Fill material. Well near old concrete <br /> MW-1 11/12/1981 3,061,101.65 1,733,408.89 6,590.40 25.5 40 PVC,1/8-in 17.0-22.0 (3-23)Brown sand to silty sand,with gravel. Remove'alluvial well to ensure all contaminated alluvial <br /> slot. (23-25.5)Bedrock. containment structure. soils are excavated and disposed of in the Minnesota Adit. <br /> 2.5-inch,Sch (0-3.5)Fill material with cobbles. These alluvial wells will not yield representative data <br /> MW-2 11/21/1981 3,061,335.76 1,733,253.84 6,581.30 15.4 40 PVC,1/8-in 8.4-13.4 (3.5-21)Brown sand to silty sand,with gravel Usually dry. once the surrounding alluvium/fill material has been <br /> slot. and cobbles. disturbed/removed. The current groundwater <br /> 21-23.5 Bedrock. monitoring network(Figure 2)provides sufficient <br /> 4-inch,Sch 40 (0-15)Alluvium gravels with fine brown dirt delineation with upgradient,downgradient,and cross- <br /> MW-3A 6/19/1989 3,061,527.53 1,733,004.02 6,576.40 14.0 PVC,0.03-in 8.5-13.5 Usually dry. gradient monitoring locations. <br /> slot. (fill in parking lot). <br /> Remove MW-9. This well is no longer sampled because it <br /> is tied in with the sump system. <br /> (0-10)Fill material. Remove alluvial well to ensure all contaminated alluvial <br /> 6-inch PVC, (10-16)Mixed sand and gravel,pebbles to soils are excavated and disposed of in the Minnesota Adit. <br /> 0.5-in slot. cobbles. <br /> MW-9 11/12/2010 3,061,955.86 1,732,775.50 6,573.18 19.2 9.0-19.0 Tied in with near-by sumps. These alluvial wells will not yield representative data <br /> (16-19.2)Bedrock. once the surrounding alluvium/fill material has been <br /> disturbed/removed. The current groundwater <br /> monitoring network(Figure 2)provides sufficient <br /> delineation with upgradient,downgradient,and cross- <br /> gradient monitoring locations. <br /> 2.375-inch Sch Retain monitoring well.MW-18 is the only deep bedrock <br /> MW-18 10/11/2012 3,061,365.47 1,732,989.78 6,574.83 239.9 80 PVC,0.02- 215.0- (0-15)Fill material/colluvium. Sample Alias=L6. well in the Ralston Creek Valley near the Illinois Fault. If <br /> in slot. 235.0 (15-239.9)Bedrock needed,remove the well casing will be shortened so that <br /> MW-18 is level with the surrounding ground surface. <br /> Notes: <br /> 1 Coordinate System: NAD 1983,CORS96 State Plane Colorado Central,FIPS 0502 Feet US <br /> amsl=above mean sea level <br /> bgs= below ground surface <br /> ft=feet <br /> ID=Identifier <br /> in=inch <br /> MW=monitoring well <br /> PAGE 3 OF 10 <br />
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