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• <br /> • <br /> Boyett Petroleum January 24, 2000 <br /> 419 Main Street, Manteca, CA <br /> Groundwater Sampling Report- December, 1999 <br /> Summary of Analytical Findings <br /> This quarter, detectable contamination levels was identified in the monitoring wells listed <br /> below: <br /> 1 Analyte MW-1 MW-2 MW-3 MW-4 <br /> Gasoline* ND ND ND ND <br /> ......................... <br /> ND <br /> Benzene ND <br /> ............ ND ND <br /> Toluene ND <br /> .................. <br /> Ethyl Benzene i ND <br /> Total Xylenes ND ND ND ND <br /> .............. ...................................... <br /> ft:14 <br /> . .. ....... ..... <br /> MTBE ND : 0 <br /> ............. . ........................ <br /> ND -"None detected" at or above Reporting Limit <br /> * Reported in mg/L. All other analytes reported in ug/L. <br /> Since the last quarters monitoring event in September, 1999, the concentration of MTBE <br /> has increased in MW-1 and MW-2. The concentration of MTBE in MW-2 and MW-4 has <br /> decreased. All other analytes are below the State's allowable limits in groundwater. Past <br /> analytical data are listed in Table 2 for comparison. Appendix A contains the laboratory <br /> analytical data and Chain of Custody report. <br /> The monitoring wells will be measured, purged and sampled again next quarter, and a <br /> new gradient calculated. <br /> 1 <br /> 2 <br />