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4 <br /> C C <br /> . 31 January 2000 <br /> AGE-NC Project No 97-0290 <br /> Page 6 of 10 <br /> Laboratory reports for soil analysis, testing methods, laboratory quality assurance/quality control <br /> (QA/QC) reports, and sample chain-of-custody documentation will be presented in a report with <br /> findings and recommendations <br /> 4.0. PROCEDURES <br /> All field procedures will be overseen by an AGE representative under the supervision of a California <br /> Registered Geologist Procedures for SVE/IAS well installation, SVE/IAS piping system installation, <br /> SVE system start-up period,sampling,monitoring,maintenance and progress/confirmation sampling <br /> are outlined below <br /> 41 DRILLING ACTIVITIES <br /> The following procedures will be performed prior to any digging/drilling activities <br /> • Notify the PHS-EHD a minimum of 48 hours prior to commencement of any work, while <br />. securing proper city/county soil boring or well permits <br /> • All drilling locations will be marked at least 48 hours in advance for an Underground Service <br /> Alert (USA) check of underground utilities or pipes <br /> 42 SOIL VAPOR EXTRACTION SYSTEM DESIGN <br /> Initiation of an SVE system is proposed within the"core"petroleum hydrocarbon-impacted area The <br /> SVE system will consist of the one existing SVE well (VW1) and six new SVE wells SVE well <br /> locations are depicted in Figure 3 <br /> A thermal destruction process is proposed for hydrocarbon vapor recovery by utilizing a direct fired <br /> thermal oxidizer vapor extraction system (VES) The VES will be connected through a manifold box <br /> to the vapor recovery wells and should be able to operate at approximately 150 cubic feet per minute <br /> (cfm) Soil vapors will be extracted from the proposed configuration of extraction wells using a <br /> vacuum blower and routed to the thermal oxidizer Supplemental fuel (i e natural gas)will be added <br /> to maintain the optimal temperature for a maximum destruction rate of hydrocarbon vapors <br /> Information on the proposed system is included with Appendix A <br /> Advanced GeoEnvironmental,Inc <br />