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Quarterly Monitoring Report- Third Quarter 2015 Page 4 <br /> ' OAK RIDGE WINERY <br /> WKA No. 6364.08 <br /> August 25, 2015 <br /> ' Monitoring and purging equipment was cleaned prior to use in each well using a solution of <br /> Alconox"I and distilled water followed by rinsing three times in distilled water. Equipment <br /> ' cleaning rinsate and groundwater purged from the wells were disposed of in the aeration ponds <br /> on site. Well Purging Data Sheets are attached in Appendix A. <br /> 5.0 RESULTS OF MONITORING AND SAMPLE ANALYSIS <br /> 5.1 Site Groundwater Conditions <br /> Groundwater elevations (GWE) based on the DTW measurements ranged from +25.10 feet msl <br /> in MW2 to +41.79 feet msl in MW3. It should be noted that MW3 is located approximately 100 <br /> ' to 200 feet from the nearest reach of the Mokelumne River. <br /> Groundwater flow direction was calculated to be towards the southwest at a gradient of 0.022, <br /> ' which is away from the Mokelumne River. Figure 3 shows estimated groundwater elevation <br /> equipotential contours and water levels at the site. <br /> 5.2 Site Water Quality Conditions <br /> ' A summary of groundwater quality conditions determined by chemical analyses of the required <br /> constituents of concern as previously specified is presented in Appendix B, Tables B-1 and B-2. <br /> ' Quarterly parameters are given on Table B-1 and annual general minerals parameters are given <br /> on Table B-2. Each constituent of concern whose concentration did not exceed its laboratory <br /> reporting limit is excluded from the tables. Appendix C includes the laboratory data sheets and <br /> ' a copy of the chain-of-custody form for this sampling event. <br /> ' 6.0 COMPARISON OF WATER QUALITY CONDITIONS TO APPLICABLE <br /> STANDARDS <br /> 6.1 Applicable Water Quality Standards <br /> Water quality standards referenced in the RWQCB-CVR WDR or the EPA Primary and <br /> Secondary Maximum Contaminant Levels (MCLs) for the Site are as follows: 450 mg/L for <br /> TDSa; 10 mg/Lb for nitrate as nitrogen; and 6.5 to 8.5 pH units for the Secondary MCL. <br /> ' a Water Quality Goal as stated in WDR <br /> b Primary maximum contaminant level(MCL)and RWQCB-CVR MRP 05-01-172. NNi <br />