SITE INFORMATION AND CORRESPONDENCE

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DISCUSSION OF WORK DONE: On April 20, 1995, after approval of the workplan prepared by Mr. Neto of American Door Manufacturing, Charles Fry, RG from Wm. J. Hunter & Associates, arrived on location at 0930 & discussed the work with Mr. Randy Neto of American Door, and Richarf Thorpe of Jim Thorpe Oil Inc . Linda Turkatte, Sr. REHS of the San Joaquin County PHS, EHD, arrived at 0945 hours to witness the work. Using a pneumatic hammer attached to a backhoe Mr. Thorpe broke up and removed the 113" thick concrete slab. The concrete covered an area of 4 ' 7" x 91 , and was 315" below the floor of the building. After removal of the concrete, the backhoe excavated the pit area to a depth of 1116" below the building floor. It appeared that the material removed was fill consisting of gray, silty, slightly clayey sand; it was moist on top and became wet toward the bottom. It gave off a sewage-type smell, and had a slightly slick feel . The sides of the excavation consisted of native reddish-brown, slightly silty clay. The clay was dry to slightly moist, and had no odor or visible evidence of any contamination. PLATE VI gives details of that excavation. • The backhoe was unable to excavate below 1116" due to an extremely hard, dense layer of unknown substance - probably caliche or "hardpan" which is common in the area. Mr. Neto of American Door stated that the depth of the excavated area was approximately 2 feet below the bottom of the removed hydraulic fluid storage tank, previously removed. Water was noted seeping slowly into the bottom of the hole. At the direction of Linda Turkatte, Sr. REHS from the San Joaquin County Public Health Service, soil sample P-1 was taken with the backhoe bucket in the center of the north sidewall just above the base of the excavation. The geologist pushed a clean, 6" x 2" brass tube into the material contained in the bucket, promptly covered the ends of the tube with teflon tape and plastic caps, thoroughly sealed the ends with duct tape, properly labeled, and placed the sample on ice in a sealed chest for preservation pending transport to a laboratory for analysis . The location of that sample and other pertinent details are shown on PLATE VI . Another soil sample, SP-2 , was collected from the spoil pile by driving another clean brass tube into the material, covering the ends with teflon tape and plastic caps, and sealing with duct tape. The tube was labeled and placed on ice with sample P-1 . The samples were transported by Mr. Fry under chain of custody to • FGL Environmental laboratory. instructions were given to analyze 3