Laserfiche WebLink
. 3) Advance a boring to an approximate depth of 40 ft or to the <br /> saturated zone whichever occurs first, using a limited access drill <br /> rig and 8-inch diameter hollow-stem augers in the middle of the <br /> former Tank Pit, as shown in Figure 1. <br /> 4) Collect soil samples at each 5 ft level interval or at <br /> significant changes in li.thology commencing at a depth of fifteen <br /> feet, using a split spoon tube sampler loaded with pre-cleaned <br /> brass tubes. It is assumed that the upper 15 feet is disturbed soil <br /> that is known to be backfill and would not provide meaningful data. <br /> A maximum of 6 soil samples are anticipated to be collected. <br /> 5) Sampling equipment will be decontaminated using tri-sodium <br /> phosphate solution (TSP) and twice rinsed with the last rinse using <br /> distilled water prior to sampling. <br /> 6) Soil samples collected in the lowest brass liner will be <br /> preserved by covering both ends with Teflon tape, capping with <br /> plastic caps and sealing the caps with plastic tape. <br /> 7) Soil samples will be labeled and logged under Chain-of- <br /> Custody (COC) control. <br /> 8) Soil samples will be stored in a cooler with ice, transported <br /> to a state certified laboratory (SPARGER TECHNOLOGY INC. ) for <br /> . analysis with COC documentation. <br /> 9) Soil cuttings will be stored on and covered with visqueen. <br /> 10) The boring will be logged by inspection of the samples and <br /> classified using the Unified Soil Classification System by a <br /> California Certified Engineering Geologist. <br /> 11) A groundwater grab sample will be collected via a clean bailer <br /> through the hollow stem auger, labeled, placed in a cooled ice <br /> chest and transported to a state certified laboratory (SPARGER <br /> TECHNOLOGY INC. ) under COC documentation for analyses. <br /> 12) The soil and groundwater samples collected will be analyzed <br /> for Total Petroleum Hydrocarbons as Gasoline (TPHG) and Benzene, <br /> Toluene, Ethyibenzene and Xylene (BTEX) . <br /> 13) A report, signed by the Certified Engineering Geologist, will <br /> include a summary of the field work, boring log, COC documentation, <br /> certified analytical results, conclusions and recommendations. The <br /> report will be submitted to the client and the SJCEHD. <br />• <br /> 2 <br />