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Geosyntec <br /> consultants <br /> PFAS were first sampled at RRI and detected in groundwater in 2018 (Geosyntec, 2018b). The <br /> Navy retains responsibility for PFAS at RRI and has been conducting PFAS investigations at the <br /> request of DTSC and CVRWQCB since PFAS were identified in groundwater. <br /> 1.5 Objectives <br /> The objectives of the 2022 groundwater monitoring program are to: <br /> • monitor the extent of known VOC and TPH groundwater plumes at RRI; and <br /> • collect groundwater data to evaluate if monitored natural attenuation(MNA) is <br /> occurring in groundwater at RRI. <br /> Recent annual monitoring data suggests that the extent of the known groundwater plumes is <br /> stable or decreasing. As of the time of writing this 2022 GWMP, no groundwater remedial <br /> approach has been determined on an island-wide basis. <br /> RRI Groundwater Monitoring Work Plan 7 June 2022 <br />