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REVISED MONITORING AND REPORTING PROGRAM NO.93-701 -2- <br /> GEWEKE LAND DEVELOPMENT AND MARKETING <br /> SAN JOAQUIN COUNTY <br /> SAMPLING FREQUENCY <br /> Quarterly Annually <br /> Wells MW-7,MW-8,MW-9, <br /> MW-12, MW-14, and All Wells <br /> New WellsZ <br /> Annual sampling will occur in the first quarter of each calendar year. <br /> 2 New wells will be sampled quarterly for a minimum of one year. If a new well is non-detect for all <br /> constituents at detection limits listed below,the sampling frequency for that well may be changed <br /> from quarterly to annually. <br /> EPA Analytical Max. Detection Sampling <br /> Constituents Method Limit (µg1l)� Frequency <br /> Depth to Groundwater --- --- Quarterly <br /> Total Petroleum Hydrocarbons 8015M 50 Quarterly <br /> Benzene 8020 or 8260B 1.0 Quarterly <br /> Toluene 8020 or 8260B 1.0 Quarterly <br /> Ethyl benzene 8020 or 8260B 1.0 Quarterly <br /> Xylenes 8020 or 8260B 1.0 Quarterly <br /> 1,2-dichloroethane 8260B 0.5 Quarterly <br /> TBA 8260B 5.0 Quarterly <br /> Volatile Organic Compounds 8260B 1.0 to 5.0 Annually <br /> MTBE' 8260B 1.0 Annually <br /> TAME' 8260B 1.0 Annually <br /> DIPE' 8260B 1.0 Annually <br /> ETBE' 8260B 1.0 Annually <br /> ' For non-detectable results. <br /> 2 Complete a full 8260B analyses, and report all peaks. <br /> ' Fuel oxygenates, including MTBE,tertiary amyl methyl ether(TAME),di-isopropyl ether(DIPE), and <br /> ethyl tertiary butyl ether(ETBE) shall be analyzed annually in the first quarter monitoring event. If a <br /> fuel oxygenate is detected, it shall be added to the quarterly monitoring program for the well in which <br /> it was detected. <br /> REPORTING <br /> When reporting data, the Discharger shall arrange the information in tabular form so that the <br /> date, the constituents, and the concentrations are readily discernible. The data shall be <br /> summarized in such a manner as to illustrate clearly the compliance with this Order. In addition, <br />