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Geosyntec <br /> consultants <br /> 5. SCHEDULE AND REPORTING <br /> Upon DTSC and CVRWQCB approval of this 2025 GMWP,the groundwater sampling contractor <br /> (Confluence Environmental of Rio Linda, California) will be scheduled. If approval of this 2025 <br /> GMWP is received from DTSC and CVRWQCB by August 15, 2025, the 2025 groundwater <br /> monitoring event will take place in the third quarter 2025, as planned. If approval is not received <br /> by August 15, 2025, the 2025 groundwater monitoring event may not be able to be completed, <br /> pending precipitation, because of the inaccessibility of wells at RRI that occurs during wet site <br /> conditions. <br /> The results of the 2025 monitoring event will be provided to DTSC and the CVRWQCB in the <br /> 2025 annual groundwater monitoring report. The 2025 annual groundwater monitoring report will <br /> include summary tables of the groundwater results, figures with posted cis-1,2-dichloroethene and <br /> vinyl chloride results and isoconcentration contours developed based on the professional <br /> judgement of a California licensed professional geologist, potentiometric surface map, <br /> hydrographs, and groundwater monitoring well VOC concentration over time graphs. <br /> Additionally,the well location,repair,maintenance,resurvey,and replacement activities described <br /> in Section 2 of this work plan will be documented in the 2025 annual groundwater monitoring <br /> report. The 2025 laboratory reports will be uploaded to GeoTracker when the 2025 annual <br /> groundwater monitoring report is submitted to DTSC and CVRWQCB. <br /> RRI 2025 Groundwater Monitoring Work Plan 17 May 2025 <br />