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> 4 (:AVIN NEWSOM <br /> j # GOVERNOR <br /> -or, O R N I A JAREu SECRETARRY FOR <br /> NFELD <br /> WaterBoards ENVIRONMENTAL PROTECTION <br /> Central Valley Regional Water Quality Control Board <br /> 6 October 2020 <br /> Stockton Westlake Marina LLC Howard Weinberg <br /> 10100 Trinity Parkway #5 Peloria Paradise Point LLC <br /> Stockton, CA 95219 2550 Via Tejon, Suite 2B <br /> Palos Verdes Estates, CA 90274 <br /> REVIEW OF 3 SEPTEMBER 2020 PES RESPONSE LETTER FOR THE <br /> PARADISE POINT MARINA (CAO R5-2020-0701), 8095 RIO BLANCO ROAD, STOCKTON, <br /> SAN JOAQUIN COUNTY <br /> Central Valley Regional Water Quality Control Board (Central Valley Water Board) staff <br /> reviewed the 3 September 2020 RWQCB Sensitive Receptor Review— PES Response <br /> (Response Letter), submitted by PES Environmental, Inc. (PES), for the Paradise Point <br /> Marina, located at 8095 Rio Blanco Road in Stockton (Site). PES prepared the <br /> Response Letter to address Central Valley Water Board staff comments on the 2 July <br /> 2020 Sensitive Receptor Survey (SRS), provided in a letter to Stockton Westlake <br /> Marina LLC and Peloria Paradise Point LLC (collectively, the Responsible Parties) <br /> dated 20 July 2020. The Response Letter proposes additional Site investigation <br /> activities intended to supplement those presented in the 16 July 2020 LNAPL <br /> Composition and Assessment Report and Delineation Work Plan (Work Plan). The SRS <br /> was prepared and submitted by PES on behalf of the Responsible Parties in fulfillment <br /> of Required Action Number 2 of Cleanup and Abatement Order R5-2020-0701 (CAO). <br /> Central Valley Water Board staff comments on the Response Letter and Site <br /> investigation activities proposed therein follow. <br /> 1985 Well <br /> In the Response Letter, PES provides additional information on the well identified in the <br /> SRS as the "1985 Well," reportedly located approximately 1,200 feet north of the <br /> petroleum hydrocarbon release area at the Site. Because PES could not visually locate <br /> the 1985 Well in the field, they propose performing a geophysical survey, using ground- <br /> penetrating radar (GPR), in the vicinity of the reported, approximate location. Central <br /> Valley Water Board staff concurs with the proposed GPR survey to locate, and verify <br /> the existence of, the 1985 Well. If the 1985 Well is located and accessible, a water <br /> sample should be collected from this supply well to evaluate for potential petroleum <br /> hydrocarbon impacts to groundwater in this area of the Site. <br /> KARL E. LONGLEY SCD, P.E., CHAIR I PATRICK PULUPA, ESQ., EXECUTIVE OFFICER <br /> 11020 Sun Center Drive#200, Rancho Cordova, CA 95670 1 www.waterboards.ca.gov/centralvalley <br />