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21 August 1992 <br /> (GeoAudit CV 43C5-1. 61) <br /> Page 2 of 3 <br /> Tentatively, soil that shows levels of TPH as diesel under 100 <br /> mg/kg (ppm) or over 1, 000 ppm will be transported to Forward, Inc. <br /> Soil that shows levels of TPH as diesel between 100 ppm and 1, 000 <br /> ppm will be transported to BFI Waste Management. <br /> SOIL BORING SITE ASSESSMENT <br /> Residual soil contamination remains as a result of the 1, 000 gallon <br /> diesel tank removed in 1990. GeoAudit proposes to perform a soil <br /> drilling and sampling program to assess the lateral and verticle <br /> extent of the contaffinati.on. Five soil borings will be drilled in <br /> the area of the former UST (see Figure 2 - Site Plan) . Details of <br /> the proposed assessment are given below: <br /> 1) Prepare a site health and safety plan in accordance with the <br /> Occupational Safety and Health Guidance Manual for Hazardous <br /> Waste Site Activities - Prepared by National Institute for <br /> Occupational Safety and Health, Occupational Safety and Health <br /> Administration, U.S. Coast Guard and U. S. Environmental <br /> Protection Agency, October 1985. <br /> 2) Notify the EHD 48 hours prior to commencement of any work. <br /> 3) Drill approximately five vertical borings to a maximum depth <br /> of 30 feet utilizing a hollow-stem auger drill rig. The <br /> estimated boring locations are depicted on Figure 2 . <br /> 4) Obtain discrete soil samples at five foot intervals beginning <br /> at the 10 foot depth. Samples will be obtained using a split- <br /> spoon sampler loaded with three pre-cleaned brass tubes. <br /> 5) Preserve soil samples in the lead brass tube by covering both <br /> ends with aluminum sheets, capping and sealing with tape. <br /> 6) Label and log soil samples on a chain of custody form. <br /> 7) Store the samples under ice and transport the samples in a <br /> chilled container to a State certified laboratory for <br /> analysis. <br /> 8) Analyze selected soil samples (approximately 12 to 15 samples) <br /> for total petroleum hydrocarbons (TPH as diesel) and BTE&X in <br /> accordance with EPA methods 8015 and 8020, respectively. <br /> 9) Decontaminate sampling equipment in a tri-sodium phosphate <br /> solution (TSP) and rinse twice with water prior to each <br /> sampling run. <br />