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I <br /> Quarterly Monitoring Report,January 1998 <br />' Canepa s Car Wash <br /> 248 F Park St Stockton CA <br /> • March IJ 1496 <br /> I'agc S <br /> 1995 MW-5 is generally down-gradient from the former location of the underground storage tanks The <br />' historical groundwater analytical data for the site are presented in Table A, Appendix B <br /> Benzene concentrations detected to MW-2, MW-3, MW-5, and MW-6 exceed the maximum contaminant level <br /> I (MCL) of 1 0 µg/l, In drinking water (California Code of Regulations, Title 22, Drinking Water Regulatory <br /> Criteria) <br />' TPH-G and BTEX concentrations in the samples collected from MW-I and MW-3 are generally at their lowest <br /> historical levels This cannot necessarily be attributed to natural attenuation, however, because the water level <br /> in the wells has been above, or very near, the top of the well screens in MW-1, MW-2, and MW-3 since <br />' groundwater monitoring commenced in September, 1994, and in MW-4, MW-5, MW-6, and MW-7 since the <br /> May, 1995, monitoring <br /> i6 RECOMMENDATIONS <br /> Condor recommends that additional Investigation be conducted to further characterize the extent of <br /> i contamination at the site Further characterization should Includty the Installation of additional monitor wells <br /> The existing monitor wells at the site have a screened interval well below the current water table and provide <br /> little information pertaining to the vadose zone/groundwater Interface Please call us at (209) 668-9234 with <br /> i any questions _ <br /> REGD Ep�oc <br /> i <br /> i. Respectfully submitted, <br /> Condor Earth Technologies, Inc DOKDF MM <br /> NO.6430 _Ac�� <br /> R David Meade TFi CA►-��0 onald F Kresse Project Geologist California Registered <br /> Geologist#6430 <br /> i <br /> 0 <br /> I <br /> I <br /> i <br /> ICazocpalPKQMR198dnc <br /> GobI <br /> �� CONDOR <br />