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t <br /> i FOOTHILL <br /> ENGINEERING <br /> • 12793 PADDY CREEK LANE LODI. CA 96240 <br /> PH (209)368-9381 FAX ( 367-1163 <br /> Mr Michael Infurna I <br /> San Joaquin County Public Health Services February 23, 2005 <br /> 304 E Weber Third Floor <br /> Stockton, CA 95202 <br /> Subject Mrs Helen Higgins/Vogue Cleaners <br /> 2315 North California Street <br /> Stockton, CA Site code 231032 <br /> Global ID T0607700741 <br /> Dear Mr Inform <br /> Please find below the Site Conceptual Model for Vogue Cleaners <br /> SITE CONCEPTUAL MODEL <br /> SITE HISTORY <br /> The site has a long history of use as a cleamng establishment and presently has the same use On <br /> June 6, 1996,Thorpe Oil removed two empty underground storage tanks from the property under <br /> a permit from the PHS/EHD Soil samples from the tank excavation were obtained using standard <br /> methods and locations The sample from under Tank#I was taken at a depth of+/-eight feet The <br /> . sample from Tank#2 was taken at a depth of+/- nine feet Both these samples and samples from <br /> the excavation spoil showed evidence of hydrocarbon contamination(See map enclosed).All ofthe <br /> above samples were analyzed by GeoAnalytical Laboratories, Inc The location of Tank #1 is <br /> between two structures and is 25'from the closest access point by drilling equipment Tank#2 can <br /> be accessed by vertical driIIing equipment <br /> Phase I of the Site Investigation required drilling a slant soil boring under Tank#1 and a vertical <br /> soil bore at the location of Tank#2 <br /> Phase 2 of the Site Investigation was conducted to define the vertical and horizontal extent of the <br /> contamination plume It was completed on 5/28/98 with the installation of MW#2S, MW#2D, <br /> MW#3S, MW#3D, and MW#4S, MW#4D A double monitoring well was installed in each <br /> location The shallow wells (noted by the "S" letter) had a total depth of+/-55' and the deep <br /> monitoring wells had a total depth of+/-75' The original set of water samples was made on 6/11/98 <br /> (see water sample analysis, attached) The latest water samples were taken 03/18/04 and are the <br /> subject of this report <br /> Monitoring wells MW#5S and MW#5D were installed on 11/07/01 in the parking lane on the east <br /> side of California Street Soil samples indicate the presence of 1,2-Dichloroethane and 1,1- <br /> Dichloroethene in low concentrations.BTEX was not found m this new soil bore or water samples <br /> i <br /> 1 ' <br />