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—*0 -- - - - FOOTHILL ENGINEERING 12793 PADDY CREEK LANE LDDI CA 95240 PH (209) 368-9381 FAX (209) 367-1163 Mr Michael Infurna San Joaquin County Public Health Services October 19, 2001 Environmenta! Health Division P O Box 388 Stockton, CA 95201 Subject Mrs Helen Higgins / Vogue Cleaners 2315 N California Street Stockton, CA Site code 231032 Dear Mr Infurna Global ID T0607700741 Please find below the report of the findings for water samples taken from monitoring wells on the Vogue Cleaners site on 03/09/01 REPORT OF FINDINGS FOR PHASE 2 SITE INVESTIGATION QUARTERLY MONITORING WELL SAMPLES FOR 9/14/2001 i SITE HISTORY The site has along history of use as a cleaning establishment and presently has the same use On June 6, 1996,Thorpe Oil removed two empty underground storage tanks from the property under a permit from the PHS/EIID Soil samples from the tank excavation were obtained using standard methods and locations The sample from under Tank #1 was taken at a depth of+/- eight feet The sample from Tank#2 was taken at a depth of+/-nine feet Both these samples and samples from the excavation spoil showed evidence of hydrocarbon contamination(See map enclosed) All of the above samples were analyzed by GeoAnaiytical Laboratories,Inc The location of Tank#1 is between two structures and is 25'from the closest access point by drilling equipment Tank#2 can be accessed by vertical drilling equipment Phase 1 ofthe Site Investigation required drilling a slant soil boring under Tank#1 and a vertical soil bore at the location of Tank #2 ( See the attached soil and water analysis for BH#1 and MW#1) Phase 2 of the Site Investigation was conducted to define the vertical and horizontal extent of the contamination plume It was completed on 5/28/98 with the installation of MW#2S, MW#2D MW#3S,MW#3D,and MW#4S,MW#4D A double monitoring well was installed in each location The shallow wells(noted by the"S"letter)had a total depth of+/-55'and the deep monitoring wells had a total depth of+/-75' The original set of water samples was made on 6/11/98 (see water sample analysis,attached) The latest water samples were takers 09/14/01 and are the subject of this report SIMI-ANNUAL SAMPLING EVENT REPORT OF 9/14/2001 SAMPLING PROCEDURE Monitoring wells were vented and purged by normal methods per standards of the industry (see Groundwater Field Report by Del-Tech Geotechnical Services attached) Purge pump rates were+/-0 2 gallons per minute in all monitoring wells Groundwater samples were extracted from each monitoring 1