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4. Data
<br /> Results of chemical analyses of water samples taken from monitoring wells were extracted from the
<br /> CC&V environmental monitoring database and reviewed as spreadsheets. Table 3 provides a general
<br /> overview of the data.
<br /> Table 3: Overview of groundwater onitoring well data.
<br /> No. Earliest
<br /> Drainage of sample Wells General Comments
<br /> Wells
<br /> CRMW-2A-142, CRMW-2B- CRMW-3B-63: below reporting limit for
<br /> 97, CRMW-3A-35, CRMW-313- mercury and nitrite
<br /> Arequa Gulch 9 12/7/1993 63, CRMW-3C-124, CRMW-
<br /> 5A-205, CRMW-513-143, CRMW-3C-124: below reporting limit for
<br /> CRMW-5C-60,CRMW-5D-27 cadmium,lead,copper,and WAD CN
<br /> GVMW-8A-250: below reporting limit for
<br /> GVMW-1B-50, GVMW-2B-30, arsenic, cadmium, mercury, nickel, nitrite,
<br /> GVMW-3B-50, GVMW-4A- selenium,zinc and WAD CN
<br /> 480, GVMW-5-250, GVMW-
<br /> 6A-200, GVMW-7A-200, GVMW-8B-50: below reporting limit for
<br /> GVMW-7B-50, GVMW-BA- arsenic, cadmium, lead, mercury, nitrite,
<br /> 250, GVMW-8B-50, GVMW- selenium,zinc,and WAD CN
<br /> Grassy Valley 21 3/7/1994 9A-200, GVMW-10-270,
<br /> GVMW-12A-300, GVMW- GVMW-22A-70: below reporting limit for
<br /> 15A-800, GVMW-15B-100, cadmium,mercury, selenium,zinc, and WAD
<br /> GVMW-21A-190, GVMW- CN;
<br /> 22A-70, GVMW-22B-30,
<br /> GVMW-23A-90, GVMW-23B- GVMW-22B-30: below reporting limit for
<br /> 30,GVMW-24A-250 arsenic, cadmium, copper, lead, mercury,
<br /> nitrite,selenium,zinc and WAD CN
<br /> Poverty Gulch 2 3/31/2000 PGMW-IA-200,PGMW-1B-55 Dry except for 2000 and 2001
<br /> SGMW-]A, SGMW-1B, Wells are essentially always dry, limited
<br /> Squaw Gulch 8 3/17/1994 SGMW-2A, SGMW-3B, samples from
<br /> SGMW-4A, SGMW-4B, SGMW 6B-60: below reporting limit for
<br /> SGMW-6B,SGMW-713 arsenic,nitrite,and WAD CN
<br /> VIN-2A-270: below reporting limit for
<br /> arsenic, cadmium, copper, mercury, nitrite,
<br /> Vindicator Valley 4 8/27/1997 VIN-lA-220, VIN-113-50, VIN- selenium,and WAD CN
<br /> 2A-270,VIN-213-140
<br /> VIN-2B-140: below reporting limit for
<br /> copper,mercury,nitrite,and WAD CN
<br /> WCMW-1-40, WCMW-2-65, WCMW-3-134: below reporting limit for
<br /> WCMW-3-134, WCMW-5-20, arsenic,and WAD CN
<br /> Wilson Creek 11 3/8/1992 WCMW-5-125, WCMW-6-19,
<br /> WCMW-6-53, WCMW-6-81, WCMW-6-234: below reporting limit for
<br /> WCMW-6-234, WCMW-7-16, cadmium, mercury, nickel, selenium, and
<br /> WCMW-8-20 WAD CN
<br /> Table 4 presents the drainage geometric mean data for each of the DBMS approved NPLs. Significant variability in
<br /> the data is observed from drainage to drainage. Figure 3 presents the distribution of drainage geometric mean data
<br /> for all parameters with DRMS approved numeric protection limits.
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