Laserfiche WebLink
i, <br />, <br /> I �c <br /> PRELIMINARY RFPORT <br /> Moreland Court Shell <br /> Stockton, California <br /> Delta Project No.4043.1446 <br /> Page 10 <br /> E � <br /> Soil boring SB-7 was located approximately 15 feet from product line sample Iocation PLS(Figure re 2)and <br /> was advanced to a total depth of 31.5 feet. Ground water was encountered at a depth of approximately <br /> - 29 feet below grade. Soil sample PLS was collected during the tank closure activities at a depth of 4 feet <br /> below the ground surface and contained 1,130.0 parts per million (ppm) TPH as gasoline. Two soil <br /> 1. <br /> samples from soil boring SB-7 were collected at 11.5 and 26.5 feet below grade and were submitted for <br /> chemical analysis. Chemical results indicated concentrations of TPH w.c:e below the analytical method <br /> detection limit of 0.2 ppm. <br /> <_ Soil boring SB-8 was drilled within 5 feet of tank sample locations TS-2 and TS-6 (Figure 2) and was <br /> M. advanced to a depth of 26.5 feet. Ground water was not encountered. Soil sample TS-2,collected at the f <br /> base of the tank excavation,approximately 15 feet below the ground surface,contained 1,030.0 ppra TPH. <br /> F Soil samples collected from soil boring SB-8 at 165 and 26.5 feet below ground surface contained <br /> concentrations of TPH below the analytical method detection limit of 0.1 ppm. <br /> On November 8, 1989, Delta,collected a ground water sample from the site water supply well. The <br /> location of the well is shown is Figure2 ;he sample was collected from a spigot located adjacent to <br /> the wellhead and submitted to a California-certified laboratory for analysis of TPH as gasoline by FPA <br /> Method 8015,modified,halogenated velatile organics by EPA Method 8010,aromatic volatile organics by <br /> EPA Method8020,1,2-dihromoethane and 1,2-dibromo-3-chloropropane by EPA Method 504.,and organic <br /> 5 <br /> 7 <br /> t lead by California Luft Manual,December 1987..The laboratory data sheets are presented in Appendix B. <br /> All pammNets were below analytical method detection limits. ; <br /> } <br /> v A copy of a septic system permit on file at the County is presented in Appendix C. The permit issued <br /> r on August 31, 1970,was for a seepage pit to be installed at the site The proposed location o€th.pit <br /> is shown on the enclosed sketch map included with the permit Apparently,it was designed to servw as <br /> 4 an infiltration basin for drainage from the service bay of the station. It is unknown whether or not the <br /> t_ <br /> 14, seepage pit was ever constructed. No_evidence-of_the-pit_was-observed-during-Dcita's-site visit-on- <br /> November 8, 1989. <br /> pp � j <br />