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FOOTHILL <br /> � <br /> ENGINEERING <br /> 8442 PH(916}729-5184 Y�AXN 9 8�72E9-0593 5�3 <br /> I Mr Michael Infurna <br /> San Joaquin County Public Health Services February 21,; <br /> 304 E. Weber Third Floor <br /> Stockton, CA 95202 F1:R <br /> I Subject Mrs. Helen Higgins/Vogue Cleaners <br /> 2315 North California Street ° `� `S P, <br /> Stockton, CA Site code 231032 <br /> IGlobal ID T0607700741 <br /> Dear Mr Infiuria <br /> Please find attached the updated Site Conceptual Model for Vogue Cleaners. This update includes <br /> ICPT-1&2, MW-1S&D, MW-6S&D, and 1/5/06 Groundwater monitoring <br /> VOGUE CLEANERS <br /> SITE CONCEPTUAL MODEL <br /> January 5, 2006 Update <br /> SITE HISTORY <br /> The site has a long history of use as a cleaning 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 pernut from the PHS/EHD Soil samples from the tank excavation were obtained using standard <br /> methods and locations The sample from under the Stoddard Solvent Tank(Tank#1)was taken at <br /> a depth of+/-eight feet. The sample from the leaded gasoline tank(Tank#2)was taken at a depth <br /> of+/- nine feet Both these samples and samples from the excavation spoil showed evidence of <br /> hydrocarbon contamination (See map enclosed) All of the above samples were analyzed by <br /> GeoAnalytical Laboratories,Inc The location of Tank#1 is between two structures and is 25'from <br /> the closest access point by drilling equipment Tank #2 could be accessed by vertical drilling <br /> equipment <br /> Phase 1 of the Site Investigation required drilling a slant soil boring under Tank#I and a vertical <br /> soil bore at the location of Tank 42 <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 /> monrtonng wells had a total depth of+/-75'.The original set of water samples was made on 6/11/98 <br /> i <br /> (see water sample analysis, attached) <br /> Monitoring wells MW#SS and MW#SD were installed on 11/07/01 in the parking lane on the east <br /> Iside of California Street Soil samples indicate the presence of 1,2-Dichloroethane and 1,1- <br /> 1 <br />