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Working 7o Restore Nature I Report on Vapor Extraction Test January 29, 1993 Coca-Cola Former Distribution Facility, Stockton, California 5400601 ' concentrations are fluctuating around the MCL value Lead concentrations have been within the MCL in all wells, with the exception of well MW-2 in March 1991, when lead was reported at 68 ppb The MCL for lead is 50 ppb At the request of Coca-Cola, RESNA resumed quarterly groundwater morutonng at the site on December 17, 1992 Some of the results are included in Appendix A, Tables A-3 and A-4 The results of December 1992 monitoring will be discussed in detail in the Fourth Quarter 1992 Groundwater Monitoring Report (RESNA, in progress) FIELD WORK Notification of Regulatory Agencies The San Joaquin Valley Unified Air Pollution Control District (SJVUAPCD) in Modesto, ' California requires a 30 day verbal notice, and a 15 day written notice prior to performing a vapor extraction test within the Air District's jurisdiction The verbal notification was given to Mr Rupi Gill of the SJVUAPCD by RESNA on October 7, 1992 The written notification of the vapor extraction test (VET) was faxed and mailed to SJVUAPCD on October 27 A copy of this notification letter is attached in Appendix B In addition, Mr Michael Collins of the San Joaquin County Public Health Service, Environmental Health Division requested that Ms Ann Macdonald, Environmental Affairs Manager-West of Coca-Cola Enterprises-West, have RESNA send him an update on the ' status of the project, and this update was sent to him on October 28, 1992 Field Equipment The one day test was performed using a trailer-mounted internal combustion (IC) engine The major components of the IC engine are (1) A Ford industrial engine (six cylinder, 300 cubic inch displacement engine, model number CS6-6491-6007-ZB) mounted on a 3/4 ton trailer, and four propane fuel cylinders, with a total capacity of 40 gallons, (2) an instrument ' panel is incorporated into the engine housing, and a microprocessor-based control system automatically controls the flow rates of dilution air, process air, and supplemental fuel, (3) a condensate removal system for removing trapped condensate in the vapor extraction piping, (4) a 3-way catalytic converter which destroys nitrogen oxide (NOX) emissions, 1 carbon monoxide (CO), and petroleum hydrocarbon emissions, and (5) a set of associated piping, control valves, and instrumentation for field measurements and manual adjustment of controls 7