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ARCO Products Company 4 <br /> ARCO Servicc Station#0434 501 West Kenleman Lane CA September 16,1999 <br /> samples collected at a maximum concentration of 0.560 mg/kg <br /> (PL2@4'). <br /> • Approximately 1,070 tons of soil removed during UST and product line <br /> excavations was disposed of at Forward Landfill in Manteca, CA. <br /> • Groundwater was not encountered in the UST excavation. Based on <br /> the historical groundwater data, groundwater is estimated to be <br /> between 49 feet bgs to 69 feet bgs. <br /> CONCLUSION <br /> Based on the data collected during the above-described field work, gasoline hydrocarbons <br /> have not significantly impacted the soil beneath the USTs or in the areas of the product <br /> lines and dispensers. Based on this data and data collected during previous investigations <br /> at the site, SECOR requests that the site remain"closed" or if the site was re-opened, that <br /> a"No Further Action" letter be issued for this site. <br /> If you have any questions or comments regarding this letter, please feel free to call us at <br /> (916) 364-1880. <br /> Sincerely, <br /> SECOR Interrnational In orporate <br /> J`- 1� <br /> Rusty ,enkosky, P.E. <br /> Project Manager �\S�EPED GFo�o <br /> Q� GREG CNS <br /> n BARCLAY <br /> No.62 <br /> 69 <br /> Greg Barclay, RG 6260 NA Q?`P <br /> Technical Coordinator oFCnuF� <br /> Attachments: Table 1 - Soil Analytical Data-USTs and Dispensers <br /> Table 2 - Soil Analytical Data - Stockpiled Soil <br /> Figure 1 - Site Location Map <br /> Figure 2 - Site Map with Sample Locations <br /> Attachment A - Field and Laboratory Procedures <br /> Attachment B - Certified Analytical Reports and Chain-of-Custody <br /> Documentation <br /> Attachment C - Soil Disposal Certificate <br /> cc: Mr. Paul Supple, ARCO Products Company <br /> Mr. Mark List, RWQCB —Central Valley Region <br /> 077.41741.500/PULL DOC <br />