Laserfiche WebLink
1 <br /> San Joaquin County DIRECTOR <br /> PQ U i N Donna Heran,REHS <br /> Environmental Health Department ASSISTANT DIRECTOR <br /> 600 East Main Street <br /> Laurie Cotulla,REHS j <br /> Q <br /> WsY` Stockton, California 95202-3029 <br /> : { PROGRAM COORDINATORS <br /> Mike Huggins,REHS, RDI <br /> !' Margaret Lagorio,REHS <br /> C'q��Fo;R Website: www.sjgov.org/ehd Robert McClellon,REHS <br /> Phone: (209)468-3420 .teff Carruesco,REHS,RDI � <br /> Fax: (209) 464-0138 Kasey Foley,REHS <br /> February 27, 2009 <br /> i <br /> Mr. Wesley Parkinson <br /> Parkinson's I-5 ARCO Service Station <br /> 3250 West Hammer Lane <br /> Stockton, California 95209 <br /> Subject: Parkinson's 1-5 ARCO Service Station <br /> 3250 West Hammer Lane <br /> Stockton, California 95209 <br /> By e-mail on February 6, 2009, Stratus Environmental, Inc. (Stratus) notified the San <br /> Joaquin County Environmental Health Department (EHD) that due to delays in <br /> reimbursement from the Underground Storage Tank (UST) Cleanup Fund, fieldwork <br /> associated with the implementation of the ozone-bench-scale test has been delayed. The <br /> EHD understands the seriousness resulting from the current economic status of the <br /> Cleanup Fund; however, considering that it has been almost four years since the EHD <br /> first approved ozone injection as a remedial method to remove contaminants of concern <br /> at your site, further delays are not acceptable. <br /> An ozone injection system has been in operation since May 2004, at the adjacent <br /> ConocoPhillips 76 (former BP) Service Station No. 11193 at 3202 West Hammer Lane, <br /> Stockton. Considering the close proximity of your site to the 76 Service Station site, the <br /> EHD recommends that you request access to collect groundwater samples from <br /> monitoring wells screened in the same depth interval as the ozone injection wells and <br /> down gradient of the injection well(s) at the ConocoPhillips 76 site during the next <br /> quarterly I groundwater monitoring and , sampling event coordinated with the <br /> ConocoPhillips 76 site. The groundwater samples should be analyzed for metals listed in <br /> Addendum to Work Plan for Bench-scale Test and Injection Well Installation dated <br /> November 17, 2008, as well as metals listed in the original work plan (Work Plan for <br /> Bench-scale Test and Injection Well Installation) dated August 29, 2008. If analytical <br /> results indicate that groundwater quality will not be adversely affected, based on the <br /> concentrations of dissolved metals detected, and if it can be demonstrated that your site <br /> and the adjacent site have similar hydrogeological characteristics, an ozone bench-scale <br /> study may not be necessary. This evaluation may save considerable time and expense in <br /> determining whether dissolved metals may affect the groundwater quality associated with <br /> ozone in ection. <br /> I <br />