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FIELD PROCEDURES <br />' Soil Boring Construction and Sampling. <br />' The soil boring was drilled by B & F Drilling with a truck-mounted Mobile B-61 drill rig <br /> equipped with hollow-stem augers Soil samples were collected from each boring at five-foot <br />' maximum intervals with a modifled California sampler equipped with clean, two-inch diameter, <br /> six-inch long brass tubes, samples and drill cuttings were described in the field using the Unified <br /> Soil Classification System (USCS) A soil boring log describing the soils encountered is <br /> presented on Plate 4 <br /> Sample tubes were sealed with Teflon sheets, plastic end caps and duct tape to reduce volatile <br /> hydrocarbon loss The samples were screened in the field with a Microtip photoionization <br /> detector (PID) to evaluate potential hydrocarbon content Selected samples were placed in an ice <br /> chest containing ice, and submitted under chain-of-custody to a California-certified Iaboratory for <br /> analysis of Total Petroleum Hydrocarbons (TPH) using Modified EPA method 8015, Benzene, <br /> Toluene, Ethylbenzene, and Total Xylenes (BTEX), using EPA method 8020, and Total Lead <br /> using EPA method 6010 <br /> Soil generated during drilling activities was placed on the existing soil stockpiles generated during <br /> the UST removal operations <br /> IMonitoring Well Construction <br /> Monitoring wells MW-7 and MW-8 were drilled and sampled as described above and converted <br /> to monitoring wells Each well was constructed using two-inch diameter, flush pointed, Schedule <br /> 40 PVC casing, 0 02-inch slotted casing was used for the screened interval Number 3 sand was <br /> tremied into the well annulus as a filter pack The filter pack extended from the bottom of the <br /> screened interval to approximately two feet above the top of the screened interval A two-foot <br /> thick bentonite seal was placed in the well annulus above the filter pack A grout seal consisting <br /> of a Portland Cement and bentonite slurry was tremied into the well annulus above the bentonite <br /> seal Each well was completed with a locking well cap and a flush-mounted, traffic-rated well <br /> cover As-built well diagrams are presented on Plates 5 through 7 <br /> `O% <br />' <br /> WALLACE <br /> R <br /> Re ycled Daps Er ASSTES IANC <br />