2010-08-02_REVISION - M1977300 ‎(32)‎

• Permit No: M1977300
• IBM Index Class Name: REVISION
• Doc Date: 8/2/2010
• Doc Name: New Amend.- EPP- Water Quality Monitoring Plan.
• From: Cotter Corp.
• To: DRMS
• Type & Sequence: AM2
• Media Type: D
• Archive: No

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Cotter Corporation PROCEDURE Number: 3-4
Schwartzwalder Mine Page: 5 of 9
Golden, Colorado WATER MONITORING Revision: 8
Date: 08/01/2010
3.0 Ground Water Monitoring
Ground water monitoring will be conducted at locations and under the sampling and analysis schedules
outlined in the following table. As a matter of practicality, subsets of about one third of all ground water
monitoring stations may be sampled each month within a given quarter in order to meet the overall
quarterly sampling frequency requirement for all stations.
Station ID Northing Enstin Elevation Description Sam lin & Analysis Schedule'
MW00 735129 2059498 6663 Above Waste Dump (upstream of site Quarterly, Table 3 Parameters
MWO 733863 2060955 6603 Toe of Lower Waste Dump Quarter) , Table 3 Parameters
MW1 733379 2061275 6594 West Ed a Retention Ponds Quarterly, Table 3 Parameters
MW2 733209 2061518 6584 Below Retention Ponds near Creek Quarterly, Table 3 Parameters
MW3A 733016 2061680 6560 Near haul road leading to mine portals Quarter) , Table 3 Parameters
MW4 732954 2061515 6599 Near haul road leading to mine portals Quarter) , Table 3 Parameters
MW6 732673 2062222 6553 Near former Sum Number Two Quarter) ,Table3Parameters
MW7 732470 2062476 6543 Near Sum Number One Quarterly, Table 3 Parameters
MW81 732181 2062851 6532 Near property line, former POC (dry) Quarterly, Water Level Onl 1
MW9 732726 2062102 6557 Between former Sumps 2 and 3 Quarterly, Table 3 Parameters
MW101.2 731349 2059980 7394 Hillside above mine workings (dry) Quarterly, Water Level Onl 1.2
MW112 731338 2059974 7394 Hillside above mine workings Quarterly, Water Level Onl 2
MW12 732274 2062709 6510 Below Sum Number One Quarterly, Table 3 Parameters
Domestic Well 733519 2061288 6560 U radient Domestic Well Quarterly, Table 3 Parameters
Sum 1 732420 2062490 6540 Down radient Sum in Alluvial Fill Quarterly, Table 3 Parameters
Sum 4 732962 2061796 6568 U radient Sum in Alluvial Fill Quarterly, Table 3 Parameters
Mine Refill Water 732206 2061542 varies Refill Water in Mine Workin s Quarterly, Table 3 Parameters
'Normally dry
2Bentonite entering screened interval (compromised well for water quality sampling)
3.1 Ground Water Quality Parameters
Quarterly analytical ground water quality parameters, individual sample volume requirements, and
sample preparation protocols are shown in Table 2.
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