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. I <br /> M <br /> 16 August 2011 <br /> AGE-NC Project No . 97-0301 <br /> Page 11 of 11 <br /> 3 .4 . 2. DPE-Ground Water Extraction Monitoring <br /> During the "start-up" period for the DPE system , pre-treatment (post DPE) , intermediate <br /> (between each carbon vessel ) and post-treatment DPE-ground water samples will be <br /> collected from sampling ports ; DPE-ground water operational parameters (i . e , depth to <br /> water, water totalizer (total gallons), pressure gauge readings, pH , temperature) will be <br /> monitored on a daily basis . The anticipated start-up period will be approximately one <br />'i week. Following the start-up period , the DPE-ground water extraction system will be <br /> monitored , at a minimum , on a weekly basis and samples will be collected at a minimum <br /> on a monthly basis . <br /> DPE ground water samples from the pump and treat system influent, effluent and <br /> intermediate stages will be collected and submitted to a State of California CDPH-certified <br /> laboratory for analysis of the following constituents : <br /> • TPH-g and TPH-d in accordance with EPA Method 8015 Modified/5030/3550 ; and <br /> • BTEX, MTBE , ETBE , TAME , DIPE, TBA, 1 ,2-DCA and EDB in accordance with <br />'i EPA 8260 , <br /> Laboratory reports for ground water analysis , testing methods , laboratory QA/QC reports, <br /> and sample chain of custody documentation will be presented in quarterly reports . <br /> 3 .4 . 3. DPE-System Maintenance <br /> The DPE system components will be maintained on a weekly basis according to <br /> manufacturers recommendations (i . e , lubrication , oil changing , system adjustments, etc. ). <br /> After stabilization , routine maintenance would represent the only periods of "down time' for <br /> the unit. One to two times each month (assuming 24-hour operation ), the unit will be shut <br /> down for routine maintenance procedures such as oil/filter changing , maintenance and <br /> system inspections and adjustments . <br /> 3, 5 . REPORT PREPARATION <br /> Quarterly reports will be prepared presenting the findings from DPE activities. The quarterly <br /> reports will include a description of work performed and the results of the DPE influent and <br /> effluent soil-vapor analysis and DPE ground water analysis. Conclusions and <br /> recommendations will also be included in the reports, if applicable . The report will be in a <br /> format acceptable to CRWQCB guidelines, and will be reviewed and signed by a California <br /> Professional Geologist. <br /> Advanced GeoEnvironmental, Inc. <br />