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1 Eckert Cold Storage Company <br /> g P y <br /> 757 Moffat Blvd, Manteca, California August 6, 1999 <br /> ' Quarterly Groundwater Sampling Report; July, 1999 Page: 3 <br /> 1 <br /> 1991 in California, three years after the removal of the UST's on-site (Appendix D). <br /> Therefore, MTBE was never present in the motor fuel stored on-site. <br /> Given the evidence presented above it is apparent that the MTBE contamination is from <br /> ' an off-site source. WHF does not believe that Eckert Cold Storage Company is <br /> responsible for any MTBE on-site given the previously stated evidence summarized <br /> below: <br /> ' • MTBE was not found in the soil columns during the construction of MW-5, <br /> MW-6, and MW-7. <br /> t • MTBE was not found in the groundwater for the first three sampling events <br /> after the requirement to analyze groundwater for MTBE. During the <br /> November 5, 1997 sampling event, MTBE contamination was present for the <br /> tfirst time and has been increasing in concentrations ever since. <br /> • MTBE was not distributed in gasoline in California until 1991, three years after <br /> ' the removal of all UST's on the subject property. <br /> There are several potential sources up-gradient (southeast) of the subject site that may be <br /> ' contributing to the problem. One possible source of concern is the petroleum pipeline <br /> located along the Union Pacific Railroad parallel to Moffat Boulevard. This pipeline is <br /> owned and operated by Kender Morgan Energy Partners. Kender Morgan Energy <br /> ' Partners was contacted and informed WHF that the pipeline is used to pump gasoline and <br /> diesel fuel. It is WHF's opinion that the nearby sites should be investigated to determine <br /> the source, or sources, of the MTBE release. <br /> ' Prepared b �viRox�r�,ti.Tgi <br /> f - N <br /> -Z a No.00620 ZV <br /> Zu <br /> W. H. Fox, II <br /> * Expires:lune 30,2000 <br /> Registered Environmental Assessor #00620oQ�aF 0SI0N9! <br /> c<y OF CALIF <br /> N0. �4y <br /> MW w 22 339 M <br /> Leg DeLano, PW-. #22339 EXP.9-30-0/ <br /> California Registered Civil Engineer sTy clw_ <br /> ' OF CA1�C�Q <br /> ' Jason P. Cashman, M.E.M. <br /> Environmental Specialist <br />