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developed as a result of the placement of soil borings during October of 1993 A second trench was excavated along the western boundary of the site in an effort to ascertain whether contaminants had migrated onto contiguous property Discrete soil samples were acquired from the boundaries of both trenches following the removal of a total of approxi- mately 40 cubic yards Much of the soil excavated from the trench near the on-site building was discolored and malodorous- apparently as a result of fuel hydrocarbon contamination Soil excavated from the trench near the western property boundary showed no evidence of contamination All excavated soil was placed atop 6 mil polyethylene sheeting and covered with the sheeting Soil samples were obtained at the direction of Ms Mary Meays of the San Joaquin County Public Health Services Agency Environmental Health Division ( PHS/EHD) Each sample was obtained from a consolidated block of soil brought to grade within the bucket of the backhoe bucket . After removing the top few inches of soil from the portion of the bucket to be sampled, a 1 9 inch diameter by 6 0 inch long clean brass tube was driven into the soil until it was completely filled with material . The tube was then withdrawn and its ends covered with aluminum foil , fitted with plastic caps , and sealed with duct tape. Each tube was then labeled and placed into an iced , insulated container for transportation to Priority Environmental Labs of Milpitas under chain of custody Certified analyses were subsequently performed for Total Petroleum Hydro- carbons as as Diesel (TPH-D) using EPA Methods 3550/8015, Total Petroleum Hydrocarbons as Gasoline (TPH-G) , benzene, toluene, ethylbenzene , and total xylenes (BTEX) using EPA Methods 5030/8015-8020 , and Oil and Grease (TOG) using SM 5520 D&F The results of these analyses are summarized in the following table Table 3 Analytical Results of Soil Samples Acquired from Exploratory Trenches Excavated on February 22 , 1994 275 Grant Line Road, Tracy, CA Sample Date & Depth of TPH-D TPH-G B T E X TOG Sample ( ft ) ( ppm) (ppm) (ppm) (ppm) ----------------------------------------------------------- Bldg Tr/8 5 N D N D N D N .D N D N D 13 BT North/8 ' N D N D N .D N D N D N D N . D S.