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During sampling efforts, the sampler will be decontaminated prior to collection of each <br /> sample as follows: a water rinse, a detergent scrubbing, a methanol rinse and a final water <br /> rinse. The brass sleeve will be precleaned by the supplier. <br /> Upon collection, the soil samples will be removed from the sampler, and sample tube ends <br /> will be immediately sealed with aluminum foil and plastic end caps to prevent the loss of <br /> volatile compounds. The sample tubes will be labeled, enclosed in plastic bags and stored in <br /> a refrigerated ice chest. Samples will be delivered by courier to a DOHS certified laboratory <br /> for analysis. <br /> 5 ro it"42/w — <br /> Review of state and county records in addition to previous on site investigation reveals that <br /> the water table should be located between 50 and 80 feet below ground level. Because the <br /> old and new UST excavations will be 10-20 feet deep, it is unlikely that groundwater will be <br /> encountered. However, if groundwater is present, soil samples will be collected from the <br /> excavation walls at the soil water interface. A sample of groundwater will also be collected <br /> using a Voss Technologies disposable bailer suspended by a new nylon cord. Sample bottles <br /> will be filled directly from the bailer. No headspace will be left in the bottles. <br /> 5.3 Chemical Analyses <br /> Samples will be analyzed selectively for Total Petroleum Hydrocarbons (TPH) as gasoline <br /> and diesel, benzene, toluene, ethyl benzene, and xylene (BTEX) by EPA Methods 5030, 3550 <br /> and 8020, respectively, and for total lead by 7420 and EDB by 8240. <br /> 5.4 Soil Disposal <br /> Composite soil samples (1/20 y&) would be collected from the ensuing soil stockpile. <br /> Sample analyses would include CAM 17 TMC metals and total oil and grease by EPA <br /> methods 6010/7000 and 5520 (D&E) in addition to the analyses delineated in Section 5.3. If <br /> analytical results reveal that the soils can be classified as non-hazardous, and the <br /> concentrations of gasoline and diesel are below 1000 ppm and 30,000 ppm respectively, then <br /> soils will be transported by Eight Ball Trucking to the REMCO - Port Costa cement kilns for <br /> incineration. Copies of all REMCO literature are attached as Appendix E. <br /> MA/8.12.91/ENG/9284 1M 6 <br />