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GeofogicafTechnks Inc. 2741 River Road MO&W,Cal forma 95351 (209)538-64241FOX#538-5852 REPORT Phase II Environmental Site Assessment SEPTIC TANK INVESTIGATION Murray Property 7367 E. Mariposa Rd. Stockton,California Project.No. 675.2 January 22, 1999 1.0 SCOPE OF THE INVESTIGATION On behalf of Mr. Murray, Geological Technics Inc. (GTI) has performed an investigation of the septic tank and leach line as,outlined below on the property located at 7367 E. Mariposa Rd., Stockton, California. The work was performed on January 11, 1999. The purpose of this work was to further investigate the septic tank that was located on December 14, 1998 by GTI during other Phase 11 activities. The scope of work was as follows: Septic Tank and Leach Lines 1. The top of the septic tank was first exposed with a backhoe. It turned out that during the previous investigation the second chamber of the septic tank had been opened and sampled, not the first chamber as reported in the January 5, 1999 report prepared by GTI. 2. The drain pipe was exposed and followed with the backhoe. The drain pipe was a 4 inch diameter, red tile material with slip joints. The drain pipe was completely plugged with the white material from the septic tank. 3. The drain pipe was surrounded with 3-inch'drain rock. The slip joints had leaked and the drain rock was covered with the same white material that had been .observed inside the septic tank. 4. 'The drain pipe was followed in a east-southeast direction toward Mariposa Road. As the . pipe was exposed farther from the septic tank the amount of white material observed on the drain rock decreased. At approximately 25 to 30 feet from the septic tank there was no longer white material observed on the drain rock or inside the drain pipe. i 5. The drain pipe was followed to the fence at the edge of the property. A metal fish tape was then run into the pipe and a magnetometer was used to find the end of the pipe. The pipe continued about 10 feet past the fence to the location where the fiber optic cables had beer! installed.-It appears that the drain line was destroyed by the process of installing the fiber optic cable.