WORK PLANS - Laserfiche WebLink

Home Browse Search

SECOR International Incorporated June 7, 2001 Ms.Devra Lewis California Regional Water Quality Control Board Central Valley Region 3443 Routier Road, Suite A Sacramento, CA 95827-3098 OFFSITE GROUNDWATER INVESTIGATION WORK PLAN PIONEER AMERICAS,INC,26700 SOUTH BANTA ROAD,TRACY,CALIFORNIA Dear Ms. Lewis: This Work Plan has been prepared by SECOR International Inc. (SECOR)to present the scope of work for a groundwater investigation north of the Pioneer Americas, Inc. (Pioneer)facility located at 26700 South Banta Road,Tracy,California. This Work Plan has been prepared in response to correspondence from the Regional Water Quality Control Board, (RWQCB)dated May 11, 2001. The May 11,2001 RWQCB letter requested a"work plan to install additional monitoring wells to evaluate groundwater flow trends north of the site and to provide consistent lateral and vertical definition of carbon tetrachloride and chloroform in the groundwater." 1.0 BACKGROUND The Pioneer facility at 26700 South Banta Road(Site)produces sodium hypochlorite(liquid bleach)from chlorine and caustic and repackages chlorine gas into 150-pound and one-ton cylinders at the Site. Pioneer also previously purchased calcium hypochlorite from another company, which it warehoused and distributed for sale. Contract carriers delivered the products to the wholesale market. The Site previously had a sulfuric acid repackaging line and a truck maintenance shop. The location of the site is shown in Figure 1 Pioneer acquired the lease for the Site upon the acquisition of the All-Pure Chemical Company(All-Pure) in 1989. The previous owner of All-Pure(and current owner of the Site property)purchased the property in 1975 from Anderson Tire Recapping Company. Anderson Tire Recapping Company developed the Site in 1945,before which the Site was used for alfalfa production. During a January 1988 RWQCB inspection, water samples were collected from wastewater treatment Pond 1 and Pond 2 at the Site(Figure 2). These samples were analyzed by the RWQCB for volatile organic compounds(VOCs)using U.S. Environmental Protection Agency(EPA)Method 601. Testing results determined that both ponds contained chloroform at respective concentrations of 0.120 milligrams per liter (mg/L) and carbon tetrachloride at concentrations of 0.0075 mg/L and 0.0043 mg/L. At the request of the RWQCB,groundwater monitoring wells were installed at the Site. The wells have been monitored quarterly since installation and reports submitted to the RWQCB. The U.S.Department of Defense Distribution Depot San Joaquin, Tracy Facility(DDJC-Tracy), covering approximately 910 acres, is located approximately 1,500 feet west of the Site. DDJC-Tracy is a storage and distribution facility for the U.S. military services. In 1991,DDJC-Tracy was listed on the Comprehensive Environmental Response, Compensation, and Liability Act(CERCLA)National Priorities List(NPL)as a Superfund site, primarily due to VOC releases to the groundwater. Monitoring data 51\ k6�a,p#,%, *ac?W,6&WW OWN ffinWc94549-4321 925 299-9300 925 299-9302 Fax wwwMCMcffiternational Inc.