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CAMBRIA <br /> MW-5, and MW-7 for future remediation Two additional groundwater monitoring wells <br /> (MW-8 and MW-9) were installed in March 1990 <br /> Groundwater pumping and vapor extraction tests were conducted during March 1990 to <br /> obtain hydrogeologic data, hydrocarbon concentration levels, and flow parameters for <br /> remedial system design <br /> A free product skimming system was installed to collect free product from well MW-2 in <br /> April 1990 The skimmer was later moved to well MW-7 Approximately 180 gallons of <br /> free product were skimmed from the wells <br /> Off-site groundwater monitoring well MW-10 was installed in July 1991 <br /> A soil vapor extraction (SVE) system was installed and operated full time from September <br /> 1992 to September 1993 The system operated intermittently through November 1996 <br /> The system removed an estimated 14,980 pounds of hydrocarbons from the subsurface during <br /> the first year of operation <br /> INVESTIGATION RESULTS <br /> Personnel Present Geologist Aubrey Cool directed the field sampling, working <br /> under the supervision of California Registered Geologist Joe <br /> Neely <br /> Permit Permit No 021642 was obtained from SJCPHS/EHD <br /> (Appendix A) <br /> Drilling Company Gregg Drilling, Inc of Martinez, California (C57 License <br /> No 485165) <br /> Drilling Dates March 27 through 30, 2000 <br /> Drilling Method Cone penetration testing (CPT) <br /> Sampling Methods Soils beneath the site were continuously logged using CPT <br /> equipment Encountered lithology is described on the CPT <br /> plots presented in Appendix B Soil samples from the borings <br /> were collected at 10-foot intervals for potential chemical, <br /> physical, and head-space analyses Soil samples were screened <br /> 0778 2 <br />