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11) Transmit the soil samples to a state-certified analytical laboratory for analysis of the <br /> following: <br /> Total petroleum hydrocarbons(diesel) (EPA 8015m) ; <br /> Benzene,ktoluene, ethylbenzene, and xylene (EPA 8020) <br /> 12) Grout the borings to}the surface with a cement-bentonite slurry. <br /> (Steps 13-18 are optional, if soil contamination appears to extend to groundwater) <br /> 13)Deepen three of the borings to approximately 15 feet below the groundwater interface <br /> and complete as 2-inch diameter monitoring wells according to the well design 'h <br /> shown.in Figure 4. { <br /> 14) No sooner that 48 Hours after installation, survey the elevations of the well casings and <br /> measure the depth to groundwater using a water level meter accurate to 0.01 foot. <br /> Prepare a groundwater gradient map. <br /> 15)Purge at least five well volumes from each well and measure pH, temperature, and : <br /> conductivity during purging. k , <br /> 16) Store purged water in' 55-gallon DOT-approved drums for later disposal. `1 <br /> 17) Collect groundwater!samples in sterilized 1-liter amber bottles and place in a cooled ice <br /> chest. <br /> 18) Transmit water samples to a state-certified laboratory for analysis of the following: <br /> Total petroleum hydrocarbons as diesel(EPA 602) } <br /> -Benzene,Itoluene, ethylbenzene, and xylene(EPA 8020) <br /> 19) Submit a Preliminary?Investigation and Evaluation Report describing the investigation <br /> and presenting the results. <br /> jj <br /> 'i <br /> �ll <br /> r F%`` <br />