Laserfiche WebLink
1 <br /> I <br /> GROUND ZERO ANALYSIS, INC. <br /> ! ' 3422 West Hammer Lane, Suite C-294 <br /> Stockton, California 95219 <br /> Telephone: (209) 952-3481 <br /> ' Facsimile: (209) 952-9891 <br /> � I <br /> November 30 , 1995 <br /> Ms Linda Turkatte <br /> San Joaquin County-Public Health Services <br /> ' Environmental Health Division <br /> 304 E Weber Street <br /> PO Box 388 <br /> Stockton, CA 95201-0388 <br /> ' Subject Vapor Extraction Test Report for Knowles/Roek <br /> Property, 102 South Wilson Way, Stockton, <br /> ' California <br /> Ms Turkatte, <br /> At the request of Riddle & Isola, attorneys for Mr. Carl Knowles, <br /> Ground Zero Analysis, Inc (Ground Zero) has prepared this letter <br /> report summarizing the results and conclusions of a vapor <br /> extraction test (VET) performed at the above referenced site The <br /> VET was completed to evaluate the feasibility of removing residual <br /> hydrocarbons from soil beneath the site The site location is <br /> shown on Figure 1 <br /> k VAPOR TEST WELL CONSTRUCTION <br /> Test wells VW-1, VW-3 , VW-4 , and VW-6 are constructed of 4-inch <br /> diameter PVC casing with 0 10 inch slotted screen Test wells VW-2 j <br /> and VW-5 are constructed of 2-inch diameter PVC casing with 0 10- <br /> inch slotted screen in the same borings as test wells VW-1 and VW- <br /> 4 , respectively Test wells VW-1, VW-4 are screened in higher <br /> permeability soil at depths ranging from 50 to 60 feet below ground <br /> surface (bgs) Test wells VW-2 and VW-5 are screened in lower <br /> permeability soils at depths ranging from 14 to 45 feet bgs Test <br /> wells VW-3 and VW-6 are screened in maxed permeability soils at <br /> depths ranging from 30 to 60 feet bgs Logs of the vapor test <br /> wells are included on Attachment 1 <br /> VAPOR EXTRACTION TEST <br /> On October 12 and 13 , 1995 Ground Zero performed a VET onsite to <br /> determine the feasibility of vapor extraction at this site, to <br /> determine the effective radius of influence, to select the optimum <br /> off-gas abatement process, and to develop engineering design <br /> criteria for the construction of a soil remediation system at the <br /> site The VET equipment consisted of an internal combustion (IC) <br /> engine equipped with a catalytic converter, instrumentation for <br />