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TUE 1 3 5 GERF� 'r' FSI I V4 <br /> " IS <br /> r I to C F 1 v <br /> 3 OTTC1 "SU-I-L—B0R I-NG <br /> so_;i l b�F-M4- lil a taken ar t`he center o'f"`the�tar�k <br /> This wiI:1 be done by cutting a ramp into the south end of <br /> the pit wall . The wall material will be pushed into the pit to <br /> c,- eate a ramp for the drill to enter the pit . <br /> Soil samples will be taken at 5 and 10 feet beneath the original <br /> tank pi t bottom. _ . -•gr-5U-,n d=MF=77c -1 <br /> /J1 These samples will be screened with the DVA and if the <br /> split spoon samples show less than .5 ppm increase over ambient <br /> C le,.els then the boring shall end and backfilled as outlined for <br /> the perimeter soil boring. If the sample shows in excess of .5 <br /> ppm increase over ambient the boring and sampling will continue <br /> to 30 feet in depth . <br /> kDI LS-5AMPLI_NC3 <br /> 9 h e s -i ±��o i�l s un s te�wi�:1�be amp_1-e-d ira�thr,ee- <br /> iarat'i _porno g.) These samples wi`I�l-be taken with o e-i-nch-scil'1 probe <br /> two a depth three feet into the spoils pile. These samples will be f <br /> handled and analyzed as prescribed for the soil boring samples . <br /> a <br /> SAMPLE SCREENING <br /> �s <br /> ry <br /> A Century 128--GC Organic Vapor Analyzer (FID) will be used <br /> to mnnitor and screen samples and soil borings. <br /> The Organic Vapor Analyzer will be calibrated to zero air <br /> and 95 ppm methane at the beginning of the work and recalibrated <br /> daily to zero air after 20 minutes warmup , at noon and at the <br /> completion of each days work and the results logged . <br /> SOIL BORINGS CUTTINGS " <br /> All soil cuttings from drilling will be checked with the OVA <br /> and contained in covered DOT 55 gallon drums until appropriately <br /> disposed of . Disposal of uncontaminated cuttings will be done in <br /> the? excavated tank pit during backfilling . Contaminated cuttings ;a <br /> will be manifested and transported to an appropriate hazardous <br /> waste management unit (HWMU) . i <br /> i <br /> SAMPLE HANDLING AND ANALYSIS <br /> All samples will be taken and handled in accordance with <br /> L-011 guidelines and will be transported in the appropriate sample j <br /> cn Diners a WC to Chemwest Laboratories in Sacramento $ <br /> ( c . - tificate #1505) , that day. t <br /> :d an baseline sampling done by SJC-EHD which shoes no <br /> ! ,. ,el gasoline (BTEX ) contamination, the samples will be <br /> , un for TPH-Diesel (extractable) . In addition organic lead will <br /> be r<<n on the first round of sampling as, a precautionary measure. <br /> Mt6l <br /> �� <br />