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0 • • <br /> DRAFT MONITORING AND REPORTING PROGRAM -2- <br /> FLAG <br /> 2- <br /> FLAG CITY CHEVRON, 6421 CAPITOL AVENUE,LODI <br /> SAN JOAQUIN COUNTY <br /> SAMPLING FREQUENCY <br /> Quarterly <br /> Wells and All monitoring wells (MW-1 through MW-12D) and any newly <br /> Sample installed wells, <br /> Locations All extraction wells (EX-1 through EX-10), <br /> Treatment system influent and effluent sample, and <br /> County Service Area wells #1 and #2. <br /> The annual sampling event will occur in the first quarter of each calendar year. <br /> MONITORING REQUIREMENTS <br /> EPA Anal tical Max. Detection Sampling <br /> Constituents Method Limit (µ /1) Frequency <br /> Depth to Groundwater --- --- Quarterly <br /> TPH as Gasoline and Diesel 8015M 50 Quarterly <br /> MTBE 8260B 0.5 Quarterly <br /> Benzene 8020 or 8260B 0.5 Annually <br /> Toluene 8020 or 8260B 0.5 Annually <br /> Ethyl benzene 8020 or 8260B 0.5 Annually <br /> Xylenes 8020 or 8260B 0.5 Annually <br /> TBA2 8260B 5.0 Annually <br /> TAMEZ 8260B 0.5 Annually <br /> DIPE2 8260B 0.5 Annually <br /> ETBE2 8260B 0.5 Annually <br /> Methanol2 8260B 500 Annually <br /> Ethano12 8260B 50 Annually <br /> For non-detectable results, report as less than these detection limits. <br /> 2 If a fuel oxygenate or additive, including tertiary butyl ether(TBA), tertiary amyl methyl <br /> ether(TAME), di-isopropyl ether(DIPE), ethyl tertiary butyl ether(ETBE), methanol, or <br /> ethanol is detected, it shall be added to the quarterly monitoring program for the well in which <br /> it was detected. <br />