2018-11-15_HYDROLOGY - M1980244 ‎(6)‎

• Permit No: M1980244
• IBM Index Class Name: HYDROLOGY
• Doc Date: 11/15/2018
• Doc Name Note: Demonstration of Compliance w/WQCC's Regulation #41 - Basic Standards for GW
• Doc Name: Part 1 of 5
• From: CC&V
• To: DRMS
• Email Name: AME
• Email Name: TC1
• Email Name: MAC
• Email Name: ERR
• Email Name: JPL
• Media Type: D
• Archive: No

5.2.1 Aluminum
Table 24 presents the summary statistics for aluminum by well for the Arequa Gulch data.
Table 24. Are ua Gulch aluminum statistics
CRMW- CRMW- CRMW- CRMW- CRMW- CRMW- CRMW- CRMW- CRMW-
2A 2B 3A 3B 3C 5A 5B 5C 5D
Geomean 6.83 1.81 0.99 0.09 0.02 0.02 0.01 0.03 0.17
S.D. 2.63 1.47 1.06 0.19 0.03 0.00 0.00 0.02 0.15
Max 13.70 6.20 5.07 1.43 0.11 002 0.02 0.08 0.55
Min 2.50 0.59 0.19 0.01 0.01 0.02 0.01 0.01 0.07
n 46 42 118 114 9 1 7 14 9
Reg 41 TVS 5.00 5.00 5.00 5.00 5.00 5.00 5.00 5.00 5.00
Monitoring well CRMW-2A and CRMW-3A have recorded data above the Reg 41 value of 5.0 mg/L.
5.2.2 Arsenic
Table 25 presents the summary statistics for arsenic by well for the Arequa Gulch data.
Table 25. Arequa Gulch arsenic statistics
CRMW- CRMW- CRMW- CRMW- CRMW- CRMW- CRMW- CRMW- CRMW-
2A 2B 3A 3B 3C 5A 5B 5C 5D
Geomean 0.007 0.007 N.D. 0.005 0.007 N.D. N.D. N.D. N.D.
S.D. 0.000 0.000 0.001 0.000
Max 0 007 0.007 0.006 0.007
Min 0.007 0.007 0.005 0.007
n 1 1 2 1
Reg 41 TVS 0.010 0.010 0.010 0.010 0.010 0.010 0.010 0.010 0.010
All recorded arsenic data in Arequa Gulch is below the Reg 41 value of 0.01 mg/L.
5.2.3 Cadmium
Table 26 presents the summary statistics for cadmium by well for the Arequa Gulch data.
Table 26. Arequa Gulch cadmium statistics
CRMW- CRMW- CRMW- CRMW- CRMW- CRMW- CRMW- CRMW- CRMW-
2A 2B 3A 3B 3C 5A 5B 5C 5D
Geomean 0.016 0.019 0.000 0.001 N.D. N.D. N.D. N.D. N.D.
S.D. 0.014 0.034 0.001 0.000
Max 0.062 0.162 0.002 0.002
Min 0.004 0.005 0.000 0.000
n 45 42 26 56
Reg 41 TVS 0.005 0.005 0.005 0.005 0.005 0.005 0.005 0.005 0.005
Monitoring wells CRMW-2A and CRMW-2B have recorded data above the Reg 41 value. Monitoring
wells CRMW-3C, CRMW-5A, CRMW-5B, CRMW-5C, and CRMW-513 have not recorded cadmium
values above the reporting limit threshold.
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