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<br /> <br /> <br />Arcadis U.S., Inc. <br />4119 Broad Street <br />Suite 210 <br />San Luis Obispo <br />California 93401 <br />Tel 805 706 2805 <br />www.arcadis.com <br />Page: <br />1/2 <br />Ms. Natalia Subbotnikova, REHS <br />Acting Program Coordinator <br />San Joaquin Environmental Health Department <br />1868 E. Hazelton Avenue <br />Stockton, California 95205 <br />Subject: <br />Site Investigation Well Permit Application <br />On Behalf of Republic Services, Forward Inc. & Austin Road Landfills <br /> <br />Dear Ms. Subbotnikova: <br /> <br />Enclosed please find the applications and site map with proposed locations for <br />continued interim remedial activities which includes the installation of one <br />extraction well (CDCR-EW-5) within the California Department of Corrections and <br />Rehabilitation (CDCR) property located at 7650 Newcastle Road, Stockton, <br />California in San Joaquin County. <br />The Well Installation and Interim Remedial Action Report (enclosed; Arcadis <br />2024) submitted to the Central Valley Regional Water Quality Control Board <br />(RWQCB) on October 18, 2024, indicated that the combined capture assessment <br />results from extraction wells CDCR-EW-2 through CDCR-EW-4 would not <br />achieve full capture of CDCR total volatile organic compound (TVOC) plume. The <br />assessment indicated a northeastern portion of the CDCR TVOC plume with <br />concentrations of 25 µg/L or greater located near AMW-50 will not be captured <br />with the current extraction well network. An additional extraction well installation <br />of CDCR-EW-5 approximately 70 feet northeast of AMW-50 was proposed to <br />complete the plume capture. A response from the RWQCB was issued on <br />November 21, 2024 (enclosed; RWQCB, 2024), approved this decision. <br />The installation of groundwater extraction well CDCR-EW-5 to address TVOC <br />plume capture beneath the CDCR property is in general accordance with the <br />CDCR Site Investigation Remedial Design Work Plan Second Addendum <br />(enclosed; Arcadis 2023), which was conditionally approved by the Central Valley <br />RWQCB on March 27, 2023 (enclosed; RWQCB 2023). <br /> <br />ENVIRONMENT <br /> <br /> <br />Date: <br />February 14, 2025 <br /> <br />Contact: <br />Arianne Terry <br /> <br />Phone: <br />949.993.7541 <br /> <br />Email: <br />arianne.terry@arcadis.com <br /> <br />Our ref: <br />30158195 <br /> <br />