Laserfiche WebLink
San Joaquin County <br /> Environmental Health Department DIRECTOR <br /> ? ' = ' 9 Donna Heran, REHS <br /> a 600 East Main Street <br /> U): 1 PROGRAM COORDINATORS <br /> Stockton , California 95202-3029 <br /> Margaret Lagorio, REHS <br /> Robert McClellon, REHS <br /> cq<r c • Website: www.sjgovFoley, <br /> . o <br /> org/ehd Jeff Ca , R REHS, RDI <br /> r o a Phone: (209) 468420 Kasey Foleyy, REHS <br /> Fax: (209) 464-0138 <br /> December 17 , 2009 <br /> Floyd Barnes <br /> 9477 Fountain Valley <br /> Stockton , CA 95209 <br /> Subject : Barnes Trucking <br /> 1817 Fresno Avenue <br /> Stockton, CA 95206 <br /> The San Joaquin County Environmental Health Department (EHD) has reviewed Third Quarter <br /> 2009 Rebound Evaluation and Groundwater Monitoring Report (Report) dated <br /> November 23 , 2009 , submitted on your behalf by Clearwater Group (Clearwater) and has the <br /> following comments. <br /> The Report discusses the groundwater sampling results from a routine event conducted at this <br /> site in October 2009 following a six-month hiatus of the oxygen injection remediation system . <br /> Analytical results reported increases in the dissolved contamination in several of the site's <br /> monitoring wells. Clearwater recommends preparation of an updated Corrective Action Plan <br /> (CAP) to address high concentrations of contaminants in the vicinity of wells AS- 1 and DPW-1 . <br /> The EHD agrees with this recommendation . Please proceed with submittal of an updated CAP. <br /> The CAP is due for submittal no later than February 26, 2010. <br /> In the updated-CAP please clarify, or ree o, the calculations -used - to determine the -mass of <br /> adsorbed contamination prior to remediation. The calculations submitted with the <br /> November 20 , 2002 CAP first state the thickness of the soil profile used is 10 feet, then state the <br /> depth interval of samples used to determine the average concentration is from 19-25 feet bsg , <br /> which is 6 feet, then lists samples used from 11 feet bsg to 26 feet bsg , which is 15 feet, and did <br /> not include results from tank pit samples collected at 16 feet bsg . <br /> Clearwater also proposes , at the next groundwater sampling event, to collect two groundwater <br /> samples from different depths in well DPE- 1 , both using low flow purge technique . The EHD <br /> approves this proposal. <br /> If you have any questions please call Lori Duncan at (209) 468-0337 . <br /> Sincerely, <br /> Lori Duncan , REHS Nuel C. Henderson, Jr. , PG <br /> Senior Registered Environmental Health Specialist Engineering Geologist <br /> c: James Barton , CVRWQCB, 11020 Sun Center Drive #200 , Rancho Cordova , CA 95670 <br /> Aaron Wilder, Clearwater Group , 229 Tewksbury Avenue, Point Richmond , CA 94801 <br />