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. A S S O C I A T E S I N C <br /> conducted using a field organic vapor monitonng instrument approved by the SJVUAPCD If at any <br /> ' tune the results of laboratory analyses or field monitoring readings show emission limits to be <br /> exceeded, a confirmation air sample will be taken immediately and analyzed on a 24-hour turnaround <br />' basis If emission limits are shown to be exceeded, the system will be shut down and any necessary <br /> corrective action will be performed before repeating the startup sequence SJVUAPCD will be notified <br /> that emission hiruts were exceeded within 24 hours of such indication <br />' The off-gas treatment system will be modified to an activated carbon adsorption system when the <br /> hydrocarbon concentrations of extracted vapor from subsurface soil make it safe and cost-effective to <br /> do so Typical SJVUAPCD guidelines require that, extracted vapor influent to and effluent from the <br /> carbon system will be monitored with a field instrument approved by the SJVUAPCD on a daily basis <br /> until the frequency of carbon changeout can be evaluated System monitoring frequency will likely be <br /> changed to once every 2 weeks or monthly, with a field instrument and monthly verification with by <br /> analytical laboratory testing upon receiving SJVUAPCD approval <br />' 6_6 Systems Performance Evaluation <br /> Following continued operation of the VES and air sparge system, a systems performance evaluation <br /> will be conducted to monitor the effectiveness of the remediation systems, and a report will be issued <br />' on a quarterly basis This report may include the following hours of operation, system influent and <br /> effluent field monitoring readings, laboratory results of influent and effluent air samples, total and <br />' individual vapor extraction well flow rates, total and individual air sparge well injection flow rates, <br /> induced vacuum responses recorded in observation wells, all other relevant field data collected, and <br />' results obtained such as observed radius of influence, system destruction efficiency, etc <br />' Recommendations will then be made to further optimize system performance and to further enhance <br /> remediation of impacted soil and groundwater Recommendations may include tie-in of additional <br /> vapor extraction or air sparge wells to the remediation system, upgrading of the ofd gas abatement unit, <br /> etc <br /> 1 <br />' w%62574 or�cnp report doc 13 <br />