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Southern Pacific Pipe Lines, Inc. was contacted by the City on Monday, April 4, and informed of the contamination. On April 5, Southern Pacific shut down their pipeline and performed a pressure test on the pipe. Verbal reports from Southern Pacific are that no leaks were detected during that test. Additional testing by Southern Pacific Pipe Lines, Inc. is in progress. Since the Southern Pacific Pipe Lines carrier has apparently been shown to have no leaks and no other known of possible contaminated sources are in the area, the City believes the contamination is in equilibrium and not spreading. Therefore, the City proposes the following method of construction for the water pipeline through the contaminated area. 1 . The existing bore pit will be cleaned up by a certified company, American Environmental, and contaminated materials disposed of properly. 2. The existing 36" diameter casing will be extended to the south side of Byron Road south of the Southern Pacific track and beyond the contaminated area. 3. Auger returns taken during the casing extension will be disposed of properly by American Environmental. 4. The new water pipeline will be installed inside the steel casing and watertight seals placed in the annular space between casing and pipeline at each end of the casing. The City intends to begin this work on Tuesday, April 12, 1988. The same procedure will be followed at another proposed water pipeline crossing of the Southern Pacific track approximately 1000 feet westerly of Corral Hollow Road. Where similar contamination has been indicated by Southern Pacific Railroad personnel. If your agency has objection to this procedure or would be interested in discussing the matter, the City will be holding a meeting at the office of Harris and Associates, Inc. located in Tracy at 324 E. 11th Street, Suite H on April 11th, at 2: 00 P.M. , you are invited and urged to attend. If we don' t hear from you, we will assume your concurrence with our work plan.