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i <br /> Geosyntec° <br /> consultants <br /> 5. PERFORMANCE MONITORING AND REPORTING <br /> This section presents the proposed groundwater performance monitoring and reporting activities. <br /> Monitoring wells that comprise the Sitewide GWMP and WDR permit; namely MW-006A, PT-8, <br /> PT-11, and CHMW-005A will be monitored after injection to evaluate injection performance. In <br /> addition, Geosyntec proposes to monitor wells MW-130A-U, MW-130A-L, MW-131A-U, MW- <br /> 131A-L for the duration of performance monitoring activities. Following completion of the <br /> injections,the performance monitoring wells will be sampled monthly for an approximate 6-month <br /> period, as described in Table 2. Groundwater samples will be collected following existing <br /> sampling procedures for the Site. <br /> The performance monitoring groundwater samples will be analyzed for the following analytes: <br /> • Volatile organic compounds (VOCs), <br /> • KMnO4, <br /> • Hexavalent chromium, <br /> • Total chromium, <br /> • Dissolved iron, <br /> • Dissolved manganese, <br /> • Total potassium, and <br /> • Total dissolved solids. <br /> Field parameters including groundwater level, oxidation reduction potential, electrical <br /> conductivity, dissolved oxygen, pH, and temperature, will also be collected at each well during <br /> sampling. <br /> Upon completion of field implementation activities, a Former Source Area Injection <br /> Implementation Report (Implementation Report) will be prepared and submitted to the <br /> CVRWQCB.The Report will include a detailed summary of field activities,including the injection <br /> approach, injection depths, flow rates, amendment volumes. Subsequent performance monitoring <br /> results will be included as part of routine semi-annual groundwater monitoring reporting. <br /> Former Source Area Injection Work Plan 12 August 08,2019 <br />