Laserfiche WebLink
San Joaquin County DIRECTOR <br /> PAW N Donna Heran,REHS <br /> .� Environmental Health De artment <br /> � ASSISTANT DIRECTOR <br /> ;Z{ 600 East Main Street Laurie Cotulla, REHS <br /> s Stockton, California 95202-3029 PROGRAM COORDINATORS <br /> ' Carl Borgman,REHS <br /> . gov. g Mike Huggins,REHS, RDI <br /> g i /ehd <br /> F p R�� Website: wwwsjorMargaret Lagorio,REHS <br /> Phone: (209)468-3420 Robert McClellon,REHS <br /> Fax: (209)464-0138 .teff Carruesco,REHS,RDI <br /> October 10, 2008 Kasey Foley,REHS <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 I-5 ARCO Service Station <br /> 3250 West Hammer Lane <br /> Stockton, California 95209 <br /> The San Joaquin County Environmental Health Department (EHD) has reviewed Work Plan for <br /> Bench-Scale Test and Injection Well Installation for Parkinson's I-5 ARCO Service Station, 3250 <br /> West Hammer Lane, Stockton, California, dated August 29, 2008, as prepared and submitted by <br /> Stratus Environmental, Inc. (Stratus) on your behalf In the work plan, Stratus proposes <br /> performing an ozone-bench-scale test that includes collection of soil samples to be used for the <br /> test during the installation of two ozone injection wells. Pending favorable results from the <br /> bench-scale test, the two ozone injection wells will be used during the ozone-pilot-scale test. By <br /> letter dated June 30, 2008, the EHD directed the submittal of the work plan for a bench-scale test <br /> to identify and evaluate generation, mobilization, or precipitation of harmful chemical species <br /> that could degrade groundwater or aquifer quality as a result of injecting oxidizers into the <br /> subsurface. <br /> Stratus proposes to install two injection wells at locations illustrated in Figure 2 of the work plan, <br /> to depths of approximately twenty-three feet below surface grade (bsg). Soil samples will be <br /> collected at five-foot intervals for lithological evaluation and field screening for volatile organic <br /> compounds using a photo-ionization detector. A minimum of two soil samples from each <br /> proposed boring will be submitted for laboratory analyses that include gasoline range organics <br /> (GRO); benzene, toluene, ethyl benzene, and total xylenes, (BTEX); methyl tertiary-butyl ether <br /> (MTBE), ethyl tertiary-butyl ether (ETBE), tertiary-amyl methyl ether (TAME), tertiary-butyl <br /> alcohol (TBA), di-isopropyl ether(DIPE), 1,2-dichloroethane (1,2-DCA), and 1,2-dibromoethane <br /> (EDB). Approximately ten pounds of soil generated from the two proposed soil borings will be <br /> used for the ozone-bench-scale test. Eighteen-inch long ceramic ozone sparge points will be <br /> installed at depths of approximately 21.5 and 23 feet bsg, approximately eight to ten feet below <br /> static groundwater levels. The EHD approves the installation of the two injection wells as <br /> proposed in the work plan. <br /> Stratus states that PRIMA Environmental Inc. (PRIMA) will perform the bench-scale tests using <br /> soil collected from the installation of the two injection wells, and groundwater collected from <br /> monitoring wells MW-1 and MW-2. Prior to the bench-scale test, Stratus proposes that soil <br />