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07 Octobei 2002 <br /> AGE-NC Project No 01-0827 <br /> Page 4 of 7 <br /> by the EHD Gi ound water monitoring activities will follow previously documented procedures, <br /> include recording depth to ground water measui ements and collection of ground water samples fol <br /> laboratory analysis <br /> 35 IN-SITU OZONE SPARGING <br /> Utilizing the existing IAS system AGE proposes to install a low flow, one-half pound ozone <br /> generator to infect 4-6 %total ozone saturated air into the IAS well network to oxidize the dissolved <br /> hydra ocarbons 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 I- " s�. `` <br /> The current IAS system infects air at approximately 5 cubic feet pei minute(cfin) AGE pi oposes to <br /> continue with a sparge late of 5 cfrn, which would iequiie approximately 0 05 to 0 1 cfm of dnect <br /> ozone injection into the system to achieve the acceptable concentration for oxidation (4 to 6 %) <br /> Pi ocedures foi the ozone addition ai e pi esented in Section 4 6 Additional ozone infection liter atui e <br /> is contained in Appendix A <br /> 3 6 PREPARATION OF REPORT OF FINDINGS <br /> Following the subsequent gi ound water monitoring event, a quartei ly i eport will be prepared <br /> presenting the findings The report will include a description of woi k performed and the i esults of the <br /> gi oundwatei sampling and analysis Laboi atory reports foi gi ound water analyses, testing methods, <br /> laboratory quality assurance/quality control (QA/QC) reports, and sample chain of custody <br /> documentation will be pi esented in the quarterly report Conclusions and recommendations.will also <br /> be included, if applicable <br /> The i eport will be in a format acceptable to the EHD and the CVRWQCB, and will be reviewed and <br /> signed by a California Registei ed Geologist <br /> 4.0. FIELD PROCEDURES <br /> All field pi ocedures will be overseen by an AGE rept esentative 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 /> i <br /> Advanced C,ecEnvirarunental,Inc <br />