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Ms. Carol Oz 5 <br /> December 17, 1999 <br /> The soil in the two remaining tubes was examined for lithology (when complete sample recovery <br /> occurred). All pertinent field data were recorded on the boring log. Soil characteristics were <br /> ' described using visual and field methods according to the Unified Soil Classification System <br /> (USCS). <br /> 1i <br /> The soil boring was converted to a groundwater monitoring well (MW-8). A copy of the <br /> approved San Joaquin County Public Health Services Well Permit Application Form is included as <br /> Appendix C. Copies of the approved City of Stockton Department of Public Works Application <br /> ' For Encroachment On Public Right-Of-Way and City of Stockton Revocable Permit are included <br /> as Appendix D. The groundwater monitoring well was completed using 2-inch diameter, <br /> Schedule-40, polyvinyl chloride (PVC) casing. The well was set with a ten-foot section of 0.010- <br /> inch slotted screen set at the bottom of the well (see boring log for specific depths and screen <br /> interval). Number 2112 sand was used as filter pack surrounding the well screen as appropriate. <br /> A three foot bentonite seal (hydrated bentonite chips) was added on top of the sand. The annular <br /> space above the bentonite seal was filled with bentonite grout. The monitoring well was secured <br /> at the surface with a flush-mounted, traffic-rated protection box. Construction details are <br /> presented on the boring log (Appendix B). <br /> On December 9, 1999, the newly installed groundwater monitoring well was surveyed by <br /> Siegfried Engineering of Stockton, California. A copy of well survey data is included in <br /> Appendix E. <br /> The soil samples were analyzed for TPH-G in accordance with EPA Method 8015 Modified, <br /> BTEX in accordance with EPA Method 8020, and fuel oxygenates including tert-butanol, MTBE, <br /> jDIPE, ETBE and TAME in accordance with EPA Method 8260. <br /> ' Laboratory analytical results indicated that TPH-G, BTEX, and fuel oxygenates were not detected <br /> in any of the soil samples. The analytical results for the soil samples are presented in Table 1 and <br /> ' Table 2 in Appendix F. A copy of the signed laboratory analytical report and chain-of-custody <br /> forms are included as Appendix G. <br /> r <br /> • <br />