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San Joaquin County <br /> �o ° g ' " C° Environmental Health Department DIRECTOR <br /> Donna Heran, REHS <br /> _ i 600 East Main Street <br /> PROGRAM COORDINATORS <br /> N, < Stockton , California 95202-3029 <br /> Robert McClellan, REHS <br /> Jeff Carruesco, REHS, RDI <br /> Kasey Foley, REHS <br /> Website: www.sjgov.orgfehd <br /> Phone: (209) 468-3420 t <br /> Fax: (209) 464-0138 <br /> March 29 , 2010 <br /> Ms. Stephanie McKenna Mr. Mark Springs <br /> Chevron Environmental Management Company 3535 Windham Circle <br /> 6111 Bollinger Canyon Road , Room 3652 Stockton , CA 95209 <br /> San Ramon , CA 94583 <br /> Subject: Chevron #94054 LOP Case#: 1780 <br /> 2103 Country Club Blvd. AP#: 123-080-29 <br /> Stockton , CA 95204 Global ID#: T0607700063 <br /> WORK PLAN : "Work Plan for Additional Groundwater Assessment" <br /> DATED : March 19 , 2010 . <br /> PREPARED BY: Arcadis , David Lay, P. G . <br /> STATUS: APPROVED (with conditions noted below) <br /> ADEQUATE AND NECESSARY ELEMENTS OF THE WORK PLAN IH &S 25296. 10, <br /> subd (c)(3)1 : <br /> • Install two "B" zone, conductor cased , 2 inch PVC monitoring wells , offsite/down <br /> gradient of the site to —50' bgs as required by the EHD . <br /> • Collect and analyze soil samples for TPH-GRO (8015m) and BTEX, MtBE, TAME , <br /> TBA, 1 ,2-DCA and EDB (82608) and submit a report of findings to Geotracker. <br /> COMMENTS AND CONDITIONS: <br /> • Grouting material surrounding the steel 8 . 625 inch conductor case and the 2 inch <br /> PVC well casing shall be neat cement grout or cement grout with 3-5% bentonite <br /> and_tremWpumped_fr_om the bottom of the annular space. <br /> • If the conductor casing and the PVC casings are installed inside the hollow stem <br /> augers, no centralizers are required . If not, then an adequate number of <br /> centralizers shall be used to ensure the minimum 2 inch grout annulus is provided <br /> around each of the casings. <br /> • Submit a Well Permit Application form, $89 fee, and a copy of the San Joaquin <br /> County Public Works encroachment permit immediately. <br /> • Bioparameter data proposed to be collected over the next two semi-annual <br /> groundwater sampling events should be included in a groundwater monitoring <br /> report and not the report of findings for this phase of investigation . <br /> REASONS FOR DISAPPROVAL OF THE WORK PLAN (H&S 25296 . 10, subd (c)(3)1 : <br /> • none. <br /> Michael Infurna, REHS (209) 468-3454 <br /> Senior Registered Environmental Health Specialist <br /> c: Mr. David Lay, Arcadis , 950 Glenn Drive #125 , Folsom, CA 95630 <br /> rsl <br />