ARCHIVED REPORTS_XR0008360 - Laserfiche WebLink

Home Browse Search

Final Remediation Plan Page 7 Ranch Market 23569 South Santa Fe Road Riverbank CA February 28 2001 • • The domestic wells used by the Ranch Market and three adjacent residential homes to supply shallow groundwater as the primary source of water • A well operated by the City of Riverbank is located in the Jacob Meyers Park, 700 feet south of the Site City of Riverbank Public Works Department reports the well has been tested and contains concentrations of nitrates above the maximum contaminant level of 45 mg/kg Given the Stanisluas River and well at Jacob Meyers Park are less than 1000 feet from the Site, a release at the Site to groundwater could potentially have an impact on the domestic well and the River However, all available evidence suggests the release of gasoline from the Ranch Market has not impacted domestic wells DW-1, DW-3, and DW-4, the well located in the Park, and the Stanisluas River There are several residences greater than 1700 feet to the north and up-gradient of Ranch Market (Figure 8) These wells north of the Site are located up-gradient and, therefore, have not been impacted by past activities at Ranch Market No wells were observed within the 2000 foot-radius, south of the Stanisluas River in Riverbank, California 3.0 SVE/AS FEASIBILITY TEST 3.1 Feasibility Test Activities On October 2 and 3, 2000, SECOR performed a SVE/AS feasibility test at the Site The SVE/AS feasibility test was conducted using a propane-powered Stealth Industries thermal oxidizer capable of a maximum flow rate of 250 standard cubic feet per minute (scfm) for the extraction and treatment of soil vapor prior to discharge to the atmosphere A 2 5 horsepower (hp) air compressor with a maximum capacity of 20 scfm at 120 pounds per square inch (psi), powered by a diesel generator, was utilized for air sparging The SVE/AS feasibility test utilized V-1 through V-6 for vapor extraction and AS-1 for air sparging MW-1, MW-2, MW-3, and MW-4 were used as monitonng points during the course of the test All of these wells are constructed with 2-inch diameter PVC casing and screen (Table 2) A summary of the feasibility test time period and mode of operation is provided below Date Period of Time Mode of Operation 10/02/00 0900 - 1200 (3 hours) One Well SVE Test using V-2 10/02/00 1215 - 1515 (3 hours) One Well SVE Test using V-1 10/02/00 1530 - 1830 (3 hours) One Well SVE Test using V-5 10/03/00 0800— 1100 (3 hours) Six Well SVE Test 10/03/00 1100— 1600 (5 hours) AS Test and 6 Well SVE Test 10/03/00 1600— 1700 (1 hour) Six Well SVE Test Tables 5, 6, and 7 summarize the field parameters collected during the feasibility test and soil vapor sample analytical results File FRP-report doc SBCOR International Incorporated