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5"at• of California Dspartmsnt of Health 5*"kas Memorandum To Jim Tjosvold, P. E. Date : April 29, 1988 Senior Waste Management Engineer Subject: MCCORMICK & BAXTER SEWER LINE INTEGRITY REPORT - FEBRUARY 1988 From Jeff Van Slooten Associate Hazardous Materials Specialist The report presents the findings of closed circuit television inspection of the existing sewer line from McCormick and Baxter to Church Street, along with conclusions. The report also provides information on sewer line capacities between M & B and SRWCF. The Department will withhold any comments on sewer line capacities until the volume of discharge from M&B becomes an issue. All defects in the sewer line are potential sources of emission into the environment. In addition, all joints submerged under wastewater with vertical misalignments are suspected. McCormick and Baxter is responsible to define the contamination and risks caused by the facility. Based on information provided in the closed circuit television inspection, M&B must provide data to show the mass of contaminant which has been released from defects in the lines since the time that waste discharge was initiated. Past history of the sewer line and storm drains used for M&B discharge must be provided to completely assess all releases into the environment. In a personal communication with Bob Castelli at SRWCF, it was stated that the sewer line along the direction of manhole 7 to 5 (installed in 1919) originally continued south under Highway 4 and connected at Church and Pershing. Installation of Highway 4 caused the pipe from manhole 5 to Church and Pershing to be abandoned. Also the 10 inch line on Washington Street (between manholes 8 and 7) was also replaced at some unknown time because the line was plugged. Deposition of M&B wastewater and groundwater discharge during that time should be provided. The Department does not accept the conclusion drawn by McCormick and Baxter that the potential for releases caused from the sewer line are low. The results are speculative with no data presented to support the opinion. Calculations to show the mass of release would be assumptive because a lack of information on chemical concentrations, amount of head, and the length of time. The report does not provide any proposals for additional work. The Department believes that soil sampling in the areas of leaky joints are necessary to define the mass of release and associated risk. JV:mr