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

5.1.15 pH
Table 19 presents the summary statistics for pH by well for the Squaw Gulch data.
Table 19. S uaw Gulch H statistics.
SGMW- SGMW- SGMW- SGMW- SGMW- SGMW- SGMW- SGMW-
IA 1B 2A 3B 4A 4B 6B 7B
Geomean 5.73 6.53 6.82 5.97 7.21 7.05 6.17 6.62
S.D. 0.65 0.43 0.93 0.38 0.29 0.34 0.46 0.16
Max 7.20 8.26 8.55 7.24 7.77 7.84 6.83 6.84
Min 4.99 5.91 5.76 5.49 6.71 6.57 5.06 6.42
n 7 54 19 72 11 16 23 4
6.5 -8.5 6.5-8.5 6.5-8.5 6.5-8.5 6.5-8.5 6.5-8.5 6.5-8.5 Reg 41TVs 6.5 -8.5
Monitoring wells SGMW-lA, SGMW-1B, SGMW-2A, SGMW-3B, SGMW-6B, and SGMW-7B have
recorded pH data outside of the Reg 41 value range of 6.5-8.5.
5.1.16 Selenium
Table 20 presents the summary statistics for selenium by well for the Squaw Gulch data.
Table 20. Squaw Gulch selenium statistics.
SGMW- SGMW- SGMW- SGMW- SGMW- SGMW- SGMW- SGMW-
lA 1B 2A 3B 4A 4B 6B 7B
Geomean N.D. N.D. N.D. 0.010 N.D. 0.006 0.007 0.005
S.D. 0.008 0.000 0.000 0.000
Max 0.023 0.006 0.007 0.005
Min 0.005 0.006 0.007 0.005
n 3 1 1 1
Reg 41 TVS 0.019 0.006 0.007 0.005
No monitoring wells have recorded values above the approved DRMS NPL of 0.024 mg/L.
19