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' QUARTERLY GROUNDWATER MONITORING REPORT <br /> IFOURTH QUARTER - October 1997 <br /> Canepa's Car Wash <br /> 248 E Park Street <br /> Stockton, California <br /> December 17, 1997 <br /> 1 INTRODUCTION <br /> Condor Earth Technologies, Inc (Condor) conducted quarterly groundwater monitoring at the Canepa's Car <br /> Wash facility located at 248 E Part. Street in Stockton, California (Figure 1 Appendix A) on October 23 1997 <br /> The groundwater monitoring was conducted at the request of Mr Remo Canepa facility owner in response to <br /> direction from Mr Ronald Rowe of the San .Joaquin Counh Public Health Services, Environmental Health <br /> Division (PIIS/EHD) The groundwater samples were analyzed at a certified laboratory for total petroleum <br /> I hydrocarbons quantified as gasoline (TPII-G) for benzene toluene ethyl benzene, and xylene (BTEX) and <br /> for methyl tertiary butyl ether (MTBE) as requested by the PHS/El-1D In addition to the previously approved <br /> scope-of-wort. Mr Rowe required that the groundwater samples also be analyzed for gasoline <br /> oxygenates/addim es <br /> This report includes a description of the field procedures and laboratory analyses conducted during the October <br /> 1997 quartcrly nionitoring A discussion of the current and historical groundwater data is presented in Section <br /> 5 0 (Discussion of Results) <br /> I2 SU11'IMARY OF RESULTS <br /> The following 5uniniary describes the data collected during the October, 1997 quarterly monitoring-: <br /> • (iroundwatcr Analysis TPH-G, BTEX and MTBE and other gasoline oxygenates/additives were <br /> not detected at or above the laboratory reported detection limits in the sample from MW-4 <br /> Laboratory anahtical results indicated that TPH-G was detected in the groundwater samples <br /> collected frorn MW-I at 0 16 ink;/L, MW-2 at 14 m�(1/L MW-3 at 0 68 mg./L, MW-5 at 13 mg/L, <br /> MW-6 at 0 14 rng/L and MW-7 at 0 18 mg/L BTEX constituents were detected in the <br /> (Tro>_indv,ater samples collected from all of the monitor wells except MW-4, ranging from 0 3 lig/l_ <br /> Ito 2 300 pg/L Gasoline oxygenates/additives were not detected at or above the laboratory reported <br /> detection limits in groundwater sample collected from any of the monitor wells with the exception <br /> of MTBE at 9 8 iLL­/L of MTBE in the sample from MW-6 The laboratory results are presented in <br /> Section 4 2 Fable 1, below and Figure 2 Appendix A <br /> LP► CONDOR <br />