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SITE ASSESSMENT REPORT Prepared for the San Joaquin Co. Local Health District by William J. Hunter & Associates PROPERTY LOCATION: 303 No. Pilgrim Street, Stockton, CA (Plate I) NAME & ADDRESS OF PROPERTY OWNER: Edwin & R.L. Engdahl ; P. O. Box 489, Stockton, CA 95201 (209) 466--2821 ASSESSOR'S PARCEL NO: 151-120-44-1 , (Plate II) LEGAL DESCRIPTION OF PROPERTY: Lots 8, 10, 12, & West 1/3 of lots 15 & 16, all in Black 219, east of Center Street, in City of Stockton. (Refer to Exhibit "A") TOPOGRAPHIC SETTING: Showing contours & water bodies-refer to Plate III , a portion of Stockton West Quadrangle sheet, revised 1987, issued by the United States Geological Service. PROXIMITY TO PUBLIC & DOMESTIC WELLS: Refer to Plate IV for the ID number and location of California Water Service wells. ,• REVIEW OF WORK DONE SINCE BEGINNING OF PROJECT: On October 26, 1988, Jim Thorpe Oil , Inc. submitted a Permanent Closure/Tank Removal Plan to the SJLHD for removal of an unused 500 gallon gasoline storage tank from the subject property. The pian was approved by the SJLHD on November 3, 1988; (refer to Exhibit "B". ) As noted below, the tank size was 1 ,000 gallons, not 500, as originally reported. On November 4, 19BB, Thorpe Oil personel uncovered and removed a 1 ,000 gallon gasoline storage tank. The tank was in poor condition and eroded. Some discoloration of the soil was observed, and a strong petroleum odor was noted when the tank was removed_ Soil samples were taken from each and of the tank, 2 feet under the tank cradle, and one sample was taken along the line leading to the location of the pump island. Samples were taken from the backhoe bucket by Canonole Laboratory personel , collected in sterilized brass tubes, and transported to Canonie Laboratories under Chain of Custody; (refer to Exhibit "C". ) Samples were to be analyzed for BTX&E,, TVPH, EDB, and total lead, as required by the SJLHD. Approximately 46 cubic yards of spoil was removed in an attempt to determine the extent of contamination. Lack of suitable equipment prevented further work at that time. The excavation was approximately 12'wide X 12 ' long X 12' deep. The total amount of spoil, removed at that time was approximately 59 cubic yards, which was placed on plastic as indicated on Exhibit "D" , and properly covered. All or portions of this operation were witnessed by a representative of the SJLHD. 2