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TABLE 3 <br /> I ANALYTICAL RESULTS OF WATER SAMPLES <br /> Larry's Auto Repair - 308 North Grant Street, Stockton, California <br /> (R91L) <br /> Sample I D/ Ethyl- TPH as TPH as <br /> Date Benzene Toluene benzene Xylene Gasoline diesel <br />' MW-1/2-22-94 1,100 890 160 640 9,200 NA <br /> MW-1/9-23-94 700 610 140 450 6,300 NA <br /> MW-1/12-14-94 640 580 140 530 5,100 NA <br /> MW-2/2-22-94 26,000 43,000 3,800 12,000 110,000 NA <br /> MW-2/9-23-94 6,400 13,000 1,800 9,900 63,000 NA <br /> IMW-2/12-14-94 4,100 7,400 1,100 6,300 46,000 NA <br /> MW-3/2-22-94 5,300 1,400 490 1,400 1.1,000 NA <br /> NNW-3/9-23-94 2,800 250 140 510 11,000 NA <br /> MW-3/12-14-94 2,800 190 100 300 6,900 NA <br /> I MW-4/2--22-94 56,000 83,000 8,300 27,000 420,000 1200 <br /> MW-4/12-14-94 30,000 34,000 2.400 13,000 120,000 55,000 <br /> p&t= parts per billion(ppb) \A = not anah-ad <br /> r <br /> also detected in each well Analytical results of groundwater samples are suinmanzed in <br /> Table 3 The laboratory results and chain of custody foini is included in Appendix B <br /> I5.0 CONCLUSIONS R RECOMMENDATIONS <br /> 5.1 Petroleum Hydrocarbon Impacted Soil <br /> The lateral extent of hydrocarbon impacted soil at the site has not been defined The San <br /> Joaquin County PHS/EHD is requiring additional assessment to determine the extent of <br /> impacted soil GeoAudrt recommends at least three slant borings to determine if impacted <br /> soil exists beneath the structure located ori-site These slant borings should be located north <br /> of boring B-1, east of boring B-1, and north of boirng*B-4 <br /> I 5.2 Petroleum Hydrocarbon Impacted Groundwater <br /> Y n <br /> IFree product was not present in MW-4 in December 1994 Therefore, GeoAudrt <br /> recommends discontinuing weekly or monthly free product removal from MW-4 However, <br /> free product should be monitored and, if necessary, removed on a quarterly basis <br /> 0­44-IA.J.sense.1- p <br /> in.ryi A•w Rejig QRn8 <br /> x 9 MIl s <br /> I <br />