Laserfiche WebLink
Department of Toxic Substances Control <br /> Yana Garcia Katherine M. Butler, MPH, Director Gavin Newsom <br /> Secretary for 8800 Cal Center Drive Governor <br /> Environmental Protection Sacramento, California 95826-3200 <br /> https:Hdtsc.ca.gov/ <br /> SENT VIA ELECTRONIC MAIL <br /> July 15, 2025 <br /> Jason Cashman <br /> Environmental Manager <br /> Port of Stockton <br /> Post Office Box 2089 <br /> Stockton, California 95201 <br /> J Cash man(a-)stocktonport.corn <br /> APPROVAL OF 2025 GROUNDWATER MONITORING WORK PLAN, STOCKTON, <br /> ROUGH AND READY ISLAND: MAY 30, 2025 <br /> Dear Mr. Cashman: <br /> By email dated May 30, 2025, Geosyntec, Inc., submitted the 2025 Groundwater <br /> Monitoring Work Plan (Work Plan) to the Department of Toxic Substances Control (DTSC) <br /> and Central Valley Regional Water Quality Control Board (CVRWQCB) on behalf of the <br /> Port of Stockton (Site) for the Rough and Ready Island (RRI). The Work Plan presents a <br /> program for groundwater monitoring at the Site for the year 2025. The objectives of the <br /> 2025 groundwater monitoring program are to: <br /> • Conduct well maintenance activities at Site 3, Site 4, Site 49 Central Area, and UST <br /> Central Area, including resurveying the top of casing elevation for monitoring wells <br /> with outdated survey data, well replacement, well development, and well location <br /> activities. <br /> • Collect data to assess biogeochemical conditions to continue evaluating <br /> feasibility of monitored natural attenuation (MNA) and in-situ treatment <br /> technologies at Site 4 and Site 49 Central Area. <br /> • Sample for volatile organic compounds (VOCs) at select wells at Site 4, Site 49 <br /> Central Area, UST 817B Central Area, Landfill Area, and Site 3 to confirm <br /> downgradient and vertical extent of the VOC groundwater plumes. <br /> I$ Printed on Recycled Paper <br />