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I ' <br /> CONC-i t WSl4NS —A—D RECOMMENDATIONS <br /> CONCLUSIONS <br /> The site groundwater has now been monitored for twenty (20) consecutive quarters. <br /> The groundwater samples were compared to the Maximum Contaminant Levels (MCLS) <br /> set forth by the applicable guidelines established by the State of California <br /> Environmental Protection Agency and the United States Environmental Protection <br /> Agency. The MCL's were used in the absence of water quality criteria established by the <br /> RJdQC6. <br /> The concentration of Nitrate as N in the groundwater monitoring wells at the site,-has <br /> ranged from 0.2 mg!! to 52.8 mg/I. Background Nitrate level this quarter in Ml A was <br /> 0.8 mg/l. No data is available for down gradient wells. <br /> The concentration of TDS has ranged from 310 mg/I to 520 mg/l. The background TDS <br /> concentration this quarter in MWA was 450 mg/I. No data is available for down gradient <br /> wells. <br /> The concentration of Ec has ranged from 314 8 pmhos/cm to 1138 pmhosfcm. The <br /> bac ",round Ec concentration uiis quarter in M.^!-1 `,RFas 653 �;mhos/c!'!t!. No data is <br /> available for down gradient wells. <br /> Figures normally included in the quarterly reports to the RWQCB, showing the general <br /> direction of groundwater gradients, Ec and Nitrate concentrations could not be <br /> generated from the data available this quarter. <br /> RECOMMENDATIONS <br /> It is revo:l':t3�a^did that the frgque -ne-v of monitoring change from quarterly to semi- <br /> annually. This recommendation is based on the consistency of results recorded at the <br /> site. <br /> 3 <br /> d . <br /> G�t;cK3uc•ti5&1BOCUltENF'v�Ctu�f7+:-.arrT,r.-�,,"�::.:G,�.w:SSS�a�.LCCc <br /> ii <br />