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National Institute for Occupational Safety and Health, Occupational Safety and <br /> Health Administration, U.S. Coast Guard and U.S. Environmental Protection <br /> Agency, October 1985. <br /> 2) Notify the EHD 48 hours prior to commencement of any work. <br /> 3) Drill three soil borings using a truck-mounted, bollow-stem auger drill rig. The <br /> estimated boring locations are depicted on Figure 2. Two soil borings will be drilled <br /> beneath the UST at an angle of 300 from vertical. A third soil boring will be drilled <br /> northeast of the UST. A fourth soil boring «ill be drilled near the dispenser piping <br /> using a hand auger. <br /> 4) Collect and log soil samples at 5-foot intervals, unless otherwise noted in section 4.0. <br /> Auger returns and soil sample duplicates will be logged in accordance with the <br /> Unified Soil Classification System. Samples will be obtained using a split-spoon <br /> sampler loaded with three pre-cleaned brass sleeves. Samples from the hand auger <br /> boring will be obtained using a metric soil sampler loaded with two pre-cleaned brass <br /> sleeves. <br /> 5) Decontaminate sampling equipment in a tri-sodium phosphate solution (TSP) and <br /> rinse twice with water prior to each sampling run. <br /> 6) Preserve soil samples in the lead brass sleeve by covering both ends with aluminum <br /> sheets, capping and sealing with tape. <br /> 7) Label and log soil samples on a chain of custody form. <br /> 8) Store the samples under ice and transport the samples in a chilled container to a <br /> state-certified laboratory for analysis. Approximately ten (10) soil samples will be <br /> analyzed for total petroleum hydrocarbons (TPH as gas and kerosene) and volatile <br /> aromatics (BTE&X) in accordance with EPA methods 8015m and 8020, respectively. <br /> A state-certified mobile laboratory may also be utilized for analysis. Detection limits <br /> will follow EPA and PHS/EHD guidelines. <br /> 9) Monitor auger returns and soil sample duplicates for the presence of volatile organics <br /> using a photo-ionization detector (PID) pre-calibrated to isobutylene. <br /> 10) Place auger returns on plastic sheeting and store on-site pending analytical results of <br /> soil samples. <br /> 11) If petroleum hydrocarbons are encountered, drilling will continue in one or more of <br /> the soil borings until the vertical extent of the impacted soil has been determined (or <br /> groundwater is encountered). <br /> 3 <br /> >,mn..,.weawrscum.sms <br />