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FIELD v � VERIFZGATIGN SAMPLING OF TANK FIC57 #554979) to drill. <br /> WEGE has contracted West Haoather151foot{depth west of the UST <br /> and sample one soil boring PVC well northeast of the UST, <br /> and drill, sample and instaroundl a 2water €oy� this site ranges from <br /> see Figure 3 . Depth to g <br /> 11 .7' to 12.9' at or well 1 samples will be <br /> Of each boring, p <br /> Starting at the 11 foot depth and field screendeaector wifor tal <br /> obtained to tap of ground water, P1 exhibiting <br /> hest <br /> anis vapors usingTa sample exhibiting they highest <br /> volatile organ 1� <br /> 10.2 electron volt bulb. s that will <br /> response from the HNu will be contained in a 2 <br /> labeled with sample ID#, time sampled, <br /> sleeve, capped with aluminum foil and plastic en cap be <br /> be sealed with duck tape, <br /> ap, to be run• The sample will. then <br /> sealed, and placed on ce in a <br /> date sampled and Lock Environmental <br /> placed in a Zip-Lock baggie, day <br /> a to MATRIX <br /> transported that Y Total Petroleum <br /> cooler and transP 1676) for analysis °f and BTEX using <br /> Laboratories (DHS#TPH G) using GC FID (5030) conal Board <br /> Hydrocarbons Gas ( page <br /> 17 of Tri-Reg <br /> p g <br /> method 8020 as shown on usb110#21990. <br /> Staff Recommendation Aug GRADIENT OF <br /> a VERIFICATION OF COT3•TAMINP,IQT FREE GROUND WATER DOWN <br /> TANK FIELD. <br /> -be laced northeast of the tanusing AR <br /> r` Monitor well (MW4) will for TPF, G, BTEX and lead, <br /> and then sampledmonitor wells , <br /> developed At the time the sample is obtained, for <br /> methods. 3 will els° be sampled. All wells will be <br /> gauged <br /> MW2, and If laboratory analysis indicates that the <br /> depth to ground water, a request to destroy <br /> water sampled is contaminant free, <br /> ground resented. . <br /> all four monitor wells will be p <br /> <' WELL CONSTRUCTION <br /> 554979} under the <br /> will be drilled by West Hazmat (C5d contractors <br /> The well drilling 3037. West <br /> supervision of Western Geo-Engineers red with 8 inch hollow <br /> license 513857 and California Registe�erigeologist then sample <br /> Hazmat utilizing a truck mounted lug ' All Samples <br /> augers will drill to the eleofngrounddwater.stem aug the HNu PID' and described <br /> ? from the eleven foot depth into top les that indicate <br /> f. screened will be field screeieldyscreened tamp <br /> i ASTM guidelines. —Any_— reserved (stored in a nip <br /> 4 using labeled:-P delivered- to - - <br /> contamination will be sealed' and chain of custody <br /> I lock on ice in an ice chest) These will also be <br /> Also, samples will be obtained from the top <br /> .€RIX Laboratories.. TRTX for. analysis <br /> of ground .water and the base of delivered to MA a two <br /> preserved and chain o€ custody has been completed, <br /> G and BTEX. Once the boring The <br /> €or TPH F480 pVC casing with 0.02 inch slot will de installed <br /> inch SCH 44 the 15 foot depth to the h f°inchdeblank PVC <br /> from approximately <br /> 10 foot depth to surface will be cased with 2 <br /> casing All <br /> 'oin�a are machine threaded and sealed with 0 hinge. <br /> page2 <br />