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Beacon Station 513 October 9.1997 Lodi California Soil Management Plan r Excavation and Sampling Horizon will be present to observe the removal of the USTs. After removal of the USTs, • soil samples will be collected from native soil located approximately 2 feet below the ends of each UST. After removal of the product lines and dispensers, soil samples will be collected by driving a clean.sampling sleeve into the native soil in the product line trench and beneath the former dispenser locations. One soil sample will be collected for every 20 linear feet of product trench. The product line trench and dispenser sampling may be 1` modified in the field based on site conditions and input form the oversight agency. All soil samples will be sealed, labeled, and placed in cooled storage for transport under chain-of- custody (COC) to the laboratory. Soil excavated from the product line trenches, dispensers, and UST areas will be screened for hydrocarbons with a photoionization detector (PID) or I equivalent device. Should evidence of hydrocarbons in the soil exist, additional soil will be s` excavated at these locations until no further evidence of hydrocarbons is observed, the safe ` operating limits of the excavation are reached, or a decision is reached that further excavation of hydrocarbon-impacted soil is counter-productive. If additional excavation occurs, soil samples will be collected at the limits of the additional excavation to evaluate if - hydrocarbon-impacted soil remains in place. If during z g an y excavation activities, the excavation encounters groundwater, the groundwater will be inspected for the presence of hydrocarbons. If groundwater is impacted with hydrocarbons, a decision will made whether or not to obtain a vacuum truck for removal of groundwater. Any groundwater removed will be transported to an appropriate recycling } facility. r Soil samples and water samples (if collected) will be analyzed for total petroleum hydrocarbons as gasoline (TPHg), the gasoline constituents benzene, toluene, ethylbenzene, and xylenes (BTEX) and methyl tertiary-butyl ether (MTBE) by modified Environmental Protection Agency (EPA) Methods 801518020. Additional analyses will be performed for the oxygenated fuel additive compounds methanol, ethanol, tertiary butanol, methyl tertiary- butyl ether (MTBE), di-isopropyl ether (DIPE), ethyl tertiary butyl ether (ETBE), and tertiary amyl methyl ether(TAME) by EPA Method 8260. All analyses will be performed at Kiff Analytical, a California Department of Health Services-certified analytical laboratory ► (Cert.No. 2236) located in Davis, California. Excavated Soil ' Excavated soil will be stockpiled onsite. During excavation, the soil will be evaluated with the PID. Excavated soil will be segregated based on PID readings into "clean" and "dirty" stockpiles. Soil samples will be collected from each stockpile and analyzed to evaluate hydrocarbon content. Four discrete soil samples will be collected for every 100 cubic yards of soil. These discrete samples will be transported to Kiff Analytical and composited by the -laboratory into one sample for each 100 cubic yards. The samples will be collected by removing approximately one foot of soil from randomly selected locations at the surface of i 1513-11smp 2 HORIZON ENVIRONMENTAL INC.