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w' <br /> SSA 91-1038 <br /> Thrifty oil Company Station No. 172 page 8 <br /> 7647 Pacific Avenue <br /> Stockton,California <br /> 3.5 Grnund-Water Sam le AnaIvtica1 Results <br /> Ground-water samples collecleo from monitoring wells MW-1, MW-2, MW-3, and MW-4 were <br /> submitted to ADPL Inc., a State certified laboratory for analysis for purgeable organics, base <br /> neutral and acid organic compounds,and coliform. A duplicate sample was collected from MW-3 <br /> and analyzed for purgeable organics and baee neutral and acid organic compounds. The results <br /> of the analyses are presented in Tables 5 and 6. The tentatively identified compounds identified <br /> by the EPA Methods 624 and 625 scans are not listed in either table. The analytical reports, <br /> quality assurance data, and chain of custody documentation are presented in Appendix B2. <br /> Ground-water sampling procedures are outlined in Appendix D1. <br /> TABLE 5 <br /> i RESULTS OF LABORATORY ANALYSES OF <br /> GROUND-WATER SAMPLES(EPA METHODS 624 and 625) <br /> Thrifty oil company station No.112 <br /> 7647 Pacific Avenue <br /> stockton,California <br /> MW-3 <br /> Detected Constituent MW-1 MW-2 MW-3 (Duplicate) MW.4 <br /> 222 5,271 850 760 36.4 <br /> Benzene <br /> Ethyibenzene 00- 10.8 1,670 I65 164 cS <br /> i} <br /> 250 198 179 <5 <br /> Methylene Chloride Si.O <br /> < <br /> Toiaeue 33.1 8,8.0 <br /> 924 858 <5 <br /> Xylenes 1170. 190 8,860 2,570 2,430 19.0 <br /> i. <br /> 1,2-Dichlorobenzene <5 1,750 <5 <5 <5 <br /> 1,4-blchlorobenxenc 5 <5 <br /> 1,680 <5 <5 <5 <br /> 1,31,640 <br /> -Dichlorobenzene <5 e5 <5 <5 <br /> l' <br /> Phenol 39.2 <5 <S <5 17.7 <br /> 2-Methytpheno] [S <br /> 49.2 16.7 18.7 <5 <br /> 3 4-Methylphenol <5 46.0 <br /> <5 <5 <5 <br /> Naphthalene <br /> <5 173 69.5 77.7 c5 <br /> 4106 72.7 81.7 <5 <br /> t K 2-Me1hylnaphthalene <5 <br /> Bis•{2•ethylhexyE) <5 <br /> 18.2 <5 <br /> phthalate <br /> l ? Results in micrograms per liter(ugp)or parts per billion(ppb) <br /> < m Less than the Method Detection Limit <br /> I <br /> SSB ENVIRONMENTAL CONSULTANTS,]NC. <br /> .y <br />