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12793 e,A,PDYI CREEK LANE L(DDI, CA 95240 <br /> ? jy A31 �: PH. (209)-366436 JFA K f209) 367-1163 <br /> Ms. Carol Oz � 51 July 10, 2000 . <br /> San Joaquin County Public Health Services <br /> Environmental Health Division <br /> P. O. Box 388 <br /> Stockton, CA 95201 <br /> Site Code #1038 <br /> Subject: Michael D. & Sharon Olivarez, 300 S. California St. Stockton, Ca. <br /> 1. Analysis of Soil Bore Samples from MW#5 and MW#6 <br /> 2. Monitoring Well Information and Water Sample Analytical Testing of 5/11/2000 <br /> 3. Analysis of CPT#3 Installed 6/9/2000 in the Caltrans Right-of-Way <br /> Dear Ms. Oz: <br /> Please find the following engineering reports on the subjects stated above. <br /> Site History <br /> Five fuel USTs and one used motor oil tank were removed by Jim Thorpe Oil in November 1992 <br /> under a permit from'the PHS/EHD. Soil samples taken from under the USTs and dispensing <br /> equipment indicated the presence of hydrocarbons. Spoil from the excavation was found to contain <br />`,. hydrocarbon contamination. <br /> Clearwater Group submitted a Work Pian to install three soil borings with monitoring wells <br /> constructed in the same boring. The work described in the Clearwater Work Plan was completed <br /> in March of 1995. <br /> The excavation for the removal of the USTs was backfilled by Jim Thorpe Oil in April 1996. The <br /> excavation spoil was used for backfill material. <br /> In 1996 Foothill Engineering was requested by the owner to sample the three monitoring wells that <br /> were installed by Clearwater and take over the consultant duties of this property. <br /> On August 23, 1999, the PHS/EHD approved a Work Plan submitted by Foothill Engineering to <br /> -install replacement wells for MW#I, MW#2, and MW#3. These replacement wells were installed <br /> to correct an over-screen condition of the existing monitoring wells.Also,included in this work plan <br /> was the installation of three CPTs. To date CPT#1, CPT#2 and CPT#3 have been installed and the <br /> findings are a part of this report. Soil and groundwater samples extracted during the installation of <br /> CPTs indicate gasoline contamination to a depth of eighty-five feet(recap attached). <br /> On May 2 and 3, 2000 the soil borings for both MW#5 and MW#6 were made as described in the <br /> Work Plan of 3/17/2000.Monitoring wells were installed in both of these soil bores .The Work Plan <br /> of 3/17/2000 also included a soil bore and monitoring well (MW#4)to be installed in the sidewalk <br /> on the north side of Lafayette Street. This soil bore was not completed as planned. An unknown <br /> underground storage tank was encountered in the direct path of the soil bore. As a result of this <br /> 1 <br />