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ENGINEERING 12793 PADDY CREEK LANE LCJDI. CA 95240 PH (209)368-9381 FAX 02093 367-1163 Mr Michael Infurna o t ``�f ��1, San Joaquin County Public Health Services May 22, 2003 n 304 E Weber Third Floor �� ,� ZOlJ3 Stockton, CA 95202 ENS ��AttH Subject Mrs Helen Higgins/Vogue Cleaners r�pR1SER��}G�� 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 extracted from monitoring wells on the Vogue Cleaners site on 3120/03 FIRST QUARTER 2003 MONITORING WELL SAMPLING EVENT SITE HISTORY The site has a long 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/EHD 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 GeoAnalytical Laboraton es, Inc The Iocation 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 of the Site Investigation required drilling a slant soil boring under Tank#1 and a vertical soil bore at the location of Tank 92(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 atotal depth of+/-75' The original set of water samples was made on 6/11198 (see water sample analysis, attached) The latest water samples were taken 09/14/01 and are the subject of this report Monitoring wells MW#5S and MW#5D were install on 11/07/01 in the parking lane on the cast side of California street Soil samples indicate the presents of 1,2-Dichloroethane and 1,1- Dichloroethene in low concentrations BTEX was not found in this new soil bore or water samples SIMI-ANNUAL SAMPLING EVENT REPORT OF 3/20/2003 SAMPLING PROCEDURE 1