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presented below and summarized in Table 1. The field monitoring logs and laboratory <br /> results are attached. <br /> Operational Summary - As shown in Table 1, between March 31 and June 22, 2017, the <br /> CAP system treated approximately 15,867,200 gallons of groundwater at an average <br /> flow rate of 192,433 gallons per day. During the second quarter 2017 monitoring <br /> period, it is calculated that the GTF removed approximately 0.23 pounds of VOCs. <br /> Del-Tech records indicate that the groundwater extraction and treatment system <br /> experienced the following maintenance issues and periods of downtime during the <br /> second quarter 2017: <br /> • April 28, 2017: Del-Tech reported that well EW-3R was off-line and the breaker <br /> would not reset. Del-Tech pulled the pump and determined that the pump motor <br /> had failed. GLA notified the CVRWQCB of the pump failure. A replacement pump <br /> was installed on June 10, 2017. <br /> Effluent Monitoring — During the monitoring period, effluent samples were collected <br /> monthly and submitted for analysis of VOCs by EPA Method 82608. Table 1 summarizes <br /> the field and analytical results for the GTF during the second quarter 2017 monitoring <br /> period. As shown on Table 1, treated effluent discharged into the infiltration pond <br /> contained trace concentrations of up to three VOCs in the monthly effluent samples. In <br /> addition, cis-1,2-dichloroethene and tetrachloroethene were measured above the practical <br /> quantitation limit during the June sampling event. Total VOC concentrations in the effluent <br /> ranged from 0.6 µg/L to 1.85 Vg/L during the monitoring period. <br /> GLA hopes that the information provided herein is sufficient for your records. If you <br /> have any questions regarding this notification, please call me at (858) 451-1136. <br /> Geologic Associates <br /> William B. L ez, PG, CHG <br /> Senior Geologist <br /> cc: Joseph Lipka, Forward Inc. <br /> Victoria Warren, Republic Services <br /> Enclosure: Table 1—GTF Influent/Effluent Sample Results and Flow Rate <br /> Analytical Results—BC Laboratories <br /> Field Monitoring Reports—Del Tech <br /> M:\5017.1030\GTFmonrpt2Q17.docx 2 <br />