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qXftDAMES `lL MOORE .4 PROFESSIONAL LIMITED PARTNERSHIP Bennet Properties January 27, 1988 Page Two As discussed and agreed with you, the laboratory testing program did not include analyses for pesticides or herbicides. SOIL SAMPLING Four samples of soils in the upper foot were obtained by a Dames 8 Moore engineer on January 16, 1988. These samples were obtained from areas of dead vegetation, at the locations shown on the Site Plan, Plate 1. The area origi- nally noted as having an oily odor was found to be underlain by a concrete slab at a depth of approximately 12 inches. !Miscellaneous metal debris and hoses were found in the soil above the slab. This slab may be associated with the auto repair shop formerly located at the site. Samples were obtained using the following procedures: Surface vegetation and the upper inch or two of soil were removed by shovel in the area to be sampled. A clean, 2_5 inch diameter by 3 inch long stainless steel or brass tube was then driven into the soil using a drop hammer. The tube and surround- ing soil were removed by shovel, and the ends of the sample trimmed flush with the tube using a clean knife. The ends of the sample were immediately covered with Teflon, and then with plastic caps taped in place. The sample was labeled and stored on ice for transport to the laboratory. All tubes and knives were cleaned with trisodium phosphate, a fresh water rinse, and then a purified deionized water rinse, and dried prior to use. CFMMICAL TE=ING The four samples were delivered to Enseco California Analytical Labora- tory, in Sacramento, California, on the same day sampled. A Chain of Custody Record was retained for all samples; a copy of this document is attached. Two selected samples, 01 and /3, were composited and tested for total petroleum hydrocarbons by the Infrared (IR) method. Sample /1 was from a depth of 0 to 6 inches below ground surface in the area noted during our initial site visit as having an oily odor, southeast of the metal building (see Plate 1) . Sample 03 was from a depth of 4 to 8 inches in an area of dead vegetation, but no noticeable odor, north of the metal building, approximately halfway between the building and the property line. Samples /2 and /4 were placed in storage at the laboratory in case further testing should to required. The results of the chemical analyses indicate a concentration of total petroleum hydrocarbons of 21,000 mg/kg (ppm) in the composite sample. A copy of the laboratory report, including documentation of laboratory quality control measures, is attached.