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13 May 1999 AGE-NC Project No. 99-0557 Page 2 of 5 2.2. SOIL SAMPLE COLLECTION AND ANALYSIS AGE proposes to advance up to 17 soil probe borings at selected areas of potential environmental concern. The proposed soil probe boring locations are shown on Figure 2. As shown on Figure 2, soil probe borings will be advanced adjacent to each of the twelve active in-ground hydraulic lifts located at the site. One probe boring will be advanced adjacent to a partially abandoned in-ground hydraulic lift. One soil probe boring will be completed at the former gasoline UST location. One soil probe boring will be advanced at the former waste oil UST location. Also, up to two soil probe borings will may be advanced at areas of surficial petroleum hydrocarbon staining located at the east corner of the service department and the auto body shop buildings. Soil probe borings located adjacent to the hydraulic lifts will be advanced to a depth of approximately 15 feet below surface grade (bsg). Probe borings located at the former UST locations will be advanced to approximately 30 bsg. Soil probe borings located at the areas of surficial hydrocarbon staining will be completed to approximately 10 feet bsg. Soil samples will be collected from each probe boring at five-foot intervals from ground surface to the total depth of the boring. Soil samples will be selected for laboratory analysis based on field observations of hydrocarbon staining and odor, as well as screening using an organic vapor meter (OVM). Field procedures for advancement of probe borings and collection of soil samples are presented in Sections 3.1 and Section 3.2, respectively. Selected soil samples will be analyzed by a California Department of Health Services (DHS)- certified laboratory for the following constituents: • Total petroleum hydrocarbons (TPH) quantified as gasoline, diesel, and motor oil by EPA Method 8015 Modified/5030; • Benzene,toluene, ethylbenzene, and total xylenes (BTEX) by EPA Method 8020; • Fuel oxygenating compound methyl tertiary-butyl ether(MTBE) by EPA Method 8020; and • Polychlorinated biphenyls (PCBs) by EPA Method 8080. Each of the soil samples selected from the hydraulic lift locations,the former waste oil UST location, and the areas of surficial hydrocarbon staining locations will be analyzed for TPH and BTEX. Additionally, two soil samples with the highest reported detections of TPH collected from the hydraulic lift locations will also be analyzed for PCBs. Soil samples from the former gasoline UST location will be analyzed for TPH as gasoline (TPH-g), BTEX, and MTBE. It is proposed that one soil sample collected from each of the hydraulic lift locations and surficial hydrocarbon staining location borings will be submitted for analysis. Up to two soil samples collected from each of the Advanced CeoEnvironmental,Inc.