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07 October 2002 <br /> AGE-NC Pi oject No 01-0827 <br /> Page 4 of 7 <br /> by the EHD Ground water monitoring activities will follow previously documented pi ocedures, <br /> include i ecoi ding depth to ground water measui ements and collection of ground water samples for <br /> labor atory analysis <br /> 3 5 IN-SITU OZONE SPARGING <br /> Utilizing the existing IAS system, AGE proposes to install a low flow, one-half pound ozone <br /> generatoi to inject 4-6% total ozone satui ated air into the IAS well network to oxidize the dissolved <br /> hydrocarbons These percent ozone values are recommended concentrations from typical ozone <br /> destruction observed in field application, however, lower concentrations may ultimately be used at <br /> the site <br /> The current IAS system injects air at approximately 5 cubic feet per minute(cfrn) AGE proposes to <br /> continue with a spas ge i ate of 5 cfm, which would require approximately 0 05 to 0 1 efrn of direct <br /> ozone injection into the system to achieve the acceptable concentration for oxidation (4 to 6 %) <br /> Pi ocedures for the ozone addition ai e presented in Section 4 6 Additional ozone injection liter ature <br /> . is contained in Appendix A <br /> 36 PREPARATION OF REPORT OF FINDINGS <br /> Following the subsequent gi ound water monitoring event, a quarterly report will be pi epared <br /> presenting the findings The i eport will include a description of woi k performed and the results of the <br /> gr oundwater sampling and analysis Labor atory i eports for gi ound water analyses, testing methods, <br /> labor atory quality assui ance/quality control (QA/QC) reports, and sample chain of custody <br /> documentation will be presented in the quarterly report Conclusions and recommendations will also <br /> be included, if applicable <br /> The report will be in a format acceptable to the EHD and the CVRWQCB, and will be reviewed and <br /> signed by a California Registered Geologist <br /> 4.0. FIELD PROCEDURES <br /> All field procedui es will be overseen by an AGE representative under the supervision of a California <br /> Registered Geologist Procedures for the advancement of soil borings, soil sampling, ground water <br /> sampling, monitoring well installation and development, equipment decontamination, and sample <br /> shipment are outlined below <br /> Advanced GeoEnvironmental,In" <br />