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4 <br /> Phas <br /> e;t`Environmental Site Assessment -: <br /> Proposed AutoZone Site,Stockton;California t • <br /> ._: <br /> Pro•ec t3.97-0782 i <br /> 1 _ October 13 1997 - - <br /> . FINDINGS AND CONCLUSIONS <br /> az = <br /> r Anthony-Taylor Consultants has performed a Phase-11.-Envirom <br /> nental-Site Assessment of <br /> i = _ = <br /> - the rop m'e -- <br /> located at the northeast corner-of North Wilson Way and=Rooseve <br /> plt"Street-(f 100 <br /> North Wilson Way) in the City of Stockton, California. This investigation was performed <br /> - under permit withthe County:of Sari-Joaquin Public Health Services'. <br /> A total of forty two{42)`sjdi s4ni*s:were obtained arid-analyzed'in the area of the former <br /> ' <br /> underground storage tank that contained-gasoline. Of the forty-two (42)-sample obtained; <br /> one'(1) sample had detectable concentrations of total petroleum�hydrocarbons, ethylberizene <br /> T <br /> and xylene. The sample-obtained in=bonng=B 9-ata depth of_thirty(30) feet below ground <br /> surface.had-concentrations of-T --of 280=rng/Kg; Ethylbenzene of 560 gAg, and total. <br /> _ - - <br /> -' Xylene of L,020"µg/Kg {Table_1) Previous samples obtained=from a confirmation boring <br /> CB .3, located wi ten feet of bonng B 9, indicated that TPH and BTEX.were not present <br /> T>n the area at a depth_of approximately forty_six=(46) feet below grade.` Anthony-Taylor <br /> Consultants feels that the•concentration of TPH,-ethylbenzene and-xylene in the on soia <br /> s - <br /> samp e obtained at a depth of thirty (30) feet-be,ow grade is a "Hot Spot" and would not <br /> - - <br /> affect the development:of the-subject site nor affect the groundwater quality beneatli he <br /> r subject site: - - <br /> Table 1.: <br /> Soil Sample Analysis <br /> j TPH V-Benzene Toluene Ethylbenzene Xylene MTBE_ <br /> Sample_ _ <br /> (rn (µP��) - (µK�Kt;) ._ (µg✓K#;) <br /> _ B5D5 ND : ND:. ND `_ ND- ND ND <br /> l <br /> B5D10 ND:. ND<": - ND = ND ND ND <br /> LB5D15 - ND ND ND ND ND: ND <br /> $5D20 :- ND ND- _ ND,. --N D ND ND <br /> 777 <br /> B51)M ND:: ND ND ND. ND ND <br /> BSD30 <br /> ND ND. ND- := ND :. NO ND <br /> B6D5 ND . ND ND - ND, ND ND <br /> B6D10: ND ND_ ND` ND ND ND <br /> IMD15- ND -_ ND. ND ND ND ND <br /> t <br /> "B6D20 ND ND ND ND.z.. ND ND <br /> 66D25 ND ND - ND ND ND. ND <br /> 7B61)30`: -NDND <br /> ND--=_ _ ND ' ND ND <br />