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Table 2 , continued <br /> TPH-D -TPH-G B. T E X TOG <br /> Sample No . (ppb) (ppb) (Ppb) (ppm) <br /> -------------------------------------------=----------------- <br /> SBR-8 '200 600 -, N . D . N . D . N . D. N .D. N . D . <br /> SBR-9 87 , 000 1 , 100 , 000 .. 690 460 5500 13000 N. D. <br /> SBR-10 800 5 , 000 . N . D . N.D. 290 42 N . D . <br /> 1 Method <br /> Detection 50 50' 0 . 2 0 . 2 0 . 2 0 . 6 200 <br /> Limit <br /> TPH-D . . . Total Petroleum Hydrocarbons as Diesel ' Y <br /> TPH-G . . . Total Petroleum Hydrocarbons as Gasoline <br /> BTEX .•. . Benzene, toluene , ethylbenzene, total xylenes <br /> TOG . . . Total Oil and Grease (non--polar) <br /> ppb. . . Parts per billion . <br /> N . D . . . .Not. detected above. indicated method detection limit <br /> - w <br /> On February 22 , 1994 , EPM professional staff an an employee <br /> of Lodi Backhoe Service of- Lodi excavated two exploratory <br /> trenches at 275 ,Grant Line Road at those =locations shown in <br /> Figure 3 . The trench near- the northwest - corner of the on- <br /> site building was excavated in an effort- to locate a <br /> possible source of hydrocarbon contamination detected . <br /> during the _preparation of contaminant contours developed as <br /> a ,.result of the placement_°of soil -borings during October of <br /> 1993 . A second trench was excavated along the western <br /> boundary of the site in an effort to ascertain whether <br /> contaminants had migrated onto contiguous property . <br /> Discrete soil samples were acquired from the boundaries' of <br /> both trenches following the removal of a total of approxi-, <br /> Y mately 40 cubic yards . Much -of the soil excavated from- the <br /> trench near the 'on--site building _,was: discolored and <br /> malodorous- apparently as a- result of. fuel hydrocarbon. <br /> contaminat-ion , Soil excavated from the trench near the <br /> western property boundary showri no evidence .of <br /> contamination . Excavated soil 'was placed atop 6 mil <br /> polyethylene sheeting and covered with the sheeting . <br /> Soil samples were=--obtained at the direction of"Ms . Mary <br /> Meays of the San Joaquin County Public Health Services <br /> Agency Environmental Health Division (PHS/EHD) . Each <br /> sample was obtained from a consolidated block of soil <br /> Page 5 F <br />