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v <br /> plastic caps and sealing the caps with plastic tape. Soil <br /> samples will be labeled and' logged under Chain-of- Custody (COC) <br /> control. Soil samples will be stored in a cooler with ice, <br /> transported to a state certified laboratory for analysis with COC <br /> documentation. <br /> 9) Soil cuttings will be stored on and covered with visqueen. <br /> 10) The borings 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 minimum of three days after the installation of the wells, <br /> the wells will be developed by pumping, purging and collecting <br /> the purged groundwater in 55-gallon drums labeled awaiting <br /> analysis. Three groundwater samples, one from each well, will be <br /> collected by a clean dedicated bailer, placed in several 40 ml <br /> WAs _with.Teflon septa, _labeled, _held in a _cooled (4 Deg- s- C) -- <br /> ice chest and transported to a State Certified Laboratory, under <br /> 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, Ethylbenzene and Xylene (BTEX) . Analysis for Methyl <br /> Tertiary Butyl Ether (MTBE) will also be completed. The <br /> groundwater samples will be analyzed for TPHG by EPA Method <br /> modified with purge and trap preparation 5030 (GC/FID) with <br /> detection limits of 50ug/1. EPA Method 602 will be utilized for <br /> BTEX with a detection limit of 0.5ug/l as required by the SJCEHD. <br /> 13) Measure depth to groundwater, survey the wells and calculate <br /> a gradient. <br /> 14) A report, signed by the Certified Engineering Geologist, <br /> will include a summary of the field work, boring logs, Coc <br /> documentation, certified analytical results, conclusions and <br /> recommendations, in accordance with the "Tri-Regional Board Staff _ <br /> Recommendations for Preliminary Evaluation and Investigation of <br /> Underground Storage Tank Sites". The report will be submitted <br /> to the client and the SJCEHD. <br /> If you have questions, please call us at 510-5.05-0722, <br /> Sincerely, �\S��RE6 GEp��� <br /> JOHN N. ALT Ll <br /> �\ <br /> C► N° 1136 <br /> l/ CERTIFIE <br /> E P 1 <br /> Z Y' LP GE0 OG 5T <br /> f �c0'•' . <br /> John P. Cummings, REA, REP, OHMS John N. CA <br /> Principal 12 Epigene International <br />