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• EOMYN.a.BMOWN J4. DEC 3 ) 2019 .AL.FOF41F fl[M6iIM OPOflIOYFZ CIM11p14 AIL IPOfCEigP Water Boards Central Valley Regional Water Quality Control Board 29 December 2014 Mr. David Johnson Mr. Alan R. Coon Delta Transport, Inc. Delta Farms Reclamation Dist. 2029 dba Herman and Helen's Marina 421 South EI Dorado Street, Suite. E 15135 West Eight Mile Road Stockton, California 95203 Stockton, CA 95219-8721 REVIEW OF MONITORING REPORT, HERMAN AND HELEN'S MARINA, 15135 EIGHT MILE ROAD, STOCKTON, SAN JOAQUIN COUNTY California Regional Water Quality Control Board, Central Valley Region (Central Valley Water Board) staff reviewed the 17 November 2014 Groundwater Monitoring Report— Third Quarter 2014, submitted on your behalf by Advanced GeoEnvironmental, Inc., (AGE) for the subject site. During the third quarter, the remediation well (EW-1), the drainage ditch along the eastern portion of the site, and eleven of the site's thirteen six monitoring wells (MW-2 through MW-14) were sampled for petroleum constituents. Wells MW-2 and MW-9 could not be located, and well MWA 3 was "dry" this quarter. As shown in the following table, petroleum hydrocarbon constituents were detected in water samples from two of the monitoring wells. Third Quarter 2014 Groundwater Monitorin Results jig/l) Ethyl- Total MTBE TBA Well TPH-g Benzene Toluene Benzene Xylenes MW-3 1,800 <0.5 <0.5 <0.5 <0.5 43 86,000 M 67-4 1,100 <0.5 <0.5 <0.5 <0.5 39 980 <=Non-detect at or above laboratory reporting limits Based on the sampling results, AGE recommends continuing groundwater monitoring on a second annual basis during first and third quarters, try and locate MW-2 and MW-9, and properly decommission MW-11, MW-12, and MW-13 to facilitate construction activities planned for the levee. The three wells are located on the west side of the levee. Central Valley Water Board staff concurs with AGE's recommendations, including decommissioning the three monitoring wells. If site conditions warrant, replacement wells may be required in the future. By 30 April 2015 submit your first quarter 2015 monitoring report to Geotracker. Continue groundwater monitoring and submitting your semi-annual monitoring reports to Geotracker by 30 April and 30 October of each calendar year samples are collected. Groundwater monitoring is to continue at your site until you are informed by Central Valley Water Board staff that monitoring is no longer required. Failure to conduct groundwater KARL E. LONOLEV SOD, P.E.,cI ,R I PAMEIA C. CREEDON,EXECUTIVE OFFICER 11020 Sun Cantor DAve#200,Rancho CurOova,CA 95670 I www.Waterb*R s.ca.gov/e*ntralvalley �'j necrcieu verce