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L 30600 S. Corral Hollow <br /> Ro <br /> Exploratory Excavation Work Plan <br /> LPage: 2 <br /> LThe size and shape of the excavation may vary yaccording to actual <br /> contaminant <br /> distribution once the excavation is underway. If, at any time during the excavation, it is <br /> L determined that the contamination limits cannot be reached, M.J. Kloberdanz & <br /> Associates will recommend, to both the property owner and SEMCO, termination of the <br /> project. Other means of definition and cleanup will then be proposed. <br /> LGroundwater is not expected to be encountered above 60 feet in depth. The contaminated <br /> soil will be stockpiled on site until a characterization for disposal or treatment can be <br /> Lcompleted. <br /> L2.1 Soil Sampling <br /> The excavation will be logged under the direct supervision of a registered <br /> L professional using the Unified Soil Classification System. The color, texture, <br /> moisture, plasticity (if applicable), consistency of the earth materials, pertinent soil <br /> or bedrock characteristics, and any evidence of contamination will be noted. All <br /> L water-bearing zones and the depths at which they were encountered will be noted <br /> on these logs. <br /> L All soil sampling equipment will be thoroughly washed with TSP solution and <br /> rinsed before and between sampling to prevent cross contamination. The <br /> laboratory soil samples will not have head space and will be immediately sealed in <br /> L their liners using aluminum foil lined plastic caps taped in place. The samples will <br /> then be transferred to an ice chest containing blue ice and transported immediately <br /> to GeoAnalytical Laboratories under chain of custody. <br /> LLaboratory soil samples will be analyzed using EPA method 3 510/LUFT for diesel <br /> range petroleum hydrocarbons, EPA method 8015 modified for total petroleum <br /> Lhydrocarbons in the gasoline range and EPA method 8020 for BTEX compounds <br /> & MTBE. The minimum detection limits used for each analyte will be 0.005 <br /> Lmg/kg for BTEX&MTBE, 1.0 mg/Kg for gasoline, and 5.0 mg/kg for diesel. <br /> Prepared by: <br /> 46 � <br /> b <br /> / v <br /> L <br /> No•pZ191 � <br /> Michael J. Kloberdanz,MREA�, REHSSL California Registered Emen Assessor#02157 <br /> LCalifornia Registered Environmental Health Specialist#4783 <br /> L <br />