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IV <br />NORTH CAL <br />CONSTRUCTION Protecting the Environment <br />P. O. Box 588 Stockton, CA 95201 209/465-5886 General Engineering Class A License No. 505704 <br />September 9, 1988 <br />MCI Telecommunications Corporation <br />Pacific Division <br />21350 Cabot Boulevard <br />Hayward, California 94545 <br />Attn: Gerry Siegel <br />Re: Precision Tank Test <br />Dear Mr. Siegel: <br />On August 26, <br />1988, we performed a <br />Petro-Tite Tank Te <br />South Co <br />Hollow Road, <br />Tracy, <br />California. The <br />performed y <br />Randy Aldridge, <br />North <br />Cal Construction. <br />code for a tight <br />tank system <br />is a <br />tolerance of .050 <br />hour. Because <br />of the almost <br />infinite <br />variables involved <br />intended to be <br />a mathematical <br />tolerance and is not the <br />of actual leakage. <br />PRECISION TANK TEST <br />Tank - 1 North <br />Size - 550 gallon tank <br />Product - #2 Diesel <br />The test showed a negative .044 gallons per <br />hour. Based on the above criteria, we find <br />the tank system tested mathematically tight. <br />a at 28499 <br />test was <br />The NFPA <br />gallons pre <br />this is not <br />permission <br />This concludes our test and findings on August 26, 1988. If you <br />have any questions regarding the results, please contact me. For <br />your convenience we have provided San Joaquin Local Health <br />District with the appropriate documents. <br />Sincere , <br />R ert oyes <br />Vice President/Gen Manager <br />RWN/bm <br />CICU X4 <br />SEP 16 <br />ENVlrap <br />PERMIT/ <br />