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i <br /> IFOOTH I LL <br /> 1 ;��; Q ;, ;;J ;�EALENGINEERING <br /> PER1L1IT/zCRVICES 8 2 STORY 729 51884 YFN(:(9160PANTE 2�-0593 5843 <br /> October 5, 2005 <br /> Mr. Michael Infurna <br /> San Joaquin County Public Health Services ���® J <br /> 304 E. Weber Third Floor /c71'�05 <br /> Stockton, CA 95202 <br /> Subject: Mrs. Helen Higgins/Vogue Cleaners <br /> 2315 N California Street i <br /> - Stockton, CA -Site=code-231032 ! <br /> GloballD T0607700741 <br /> Dear Mr. Infurna: <br /> Please find below the work plan for replacing MW-1 and installing MW-6. <br /> WORK PLAN FOR MW-1S AND D, AND MW-6S AND D <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 permit from the PHS/EHD. Soil samples from the tank excavation were obtained using standard <br /> methods and locations.The sample from under T #1 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 hydrocarbori contamination(See map enclosed).All of the <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 ac ess point by drilling equipment.Tank#2 could <br /> be accessed by vertical drilling equipment. <br /> Pha.,;q.l..of the.Site IrtMestigation 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 efine 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 ori inal set of water samples was made on 6111198 <br /> (see water sample analysis, attached). The latest water samples were taken 3/17/05. <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 he presence of 1,2-Dichloroethane and 1,1- <br /> Dichloroethene in low concentrations.BTEX was not found in this new soil bore or water samples. <br /> 1 <br />