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U <br /> THE AUSTIN 2001 ILLIRANNOIS <br /> 6ROAD16 <br /> DES PLAINES. ILLINOIS 60016 <br /> COMPANY PHONE: 312/694-4300;TELEX; 133.0833 <br /> 01 TELEX: 91 O•233•0893 <br /> ARCHITECTS A N D ENGINEERS <br /> November 11 , 1988 kv <br /> 20aySpearnStreet EyV�aON iSE�CE'jH <br /> 6th Floor PERM - <br /> San Francisco, CA 94105 <br /> Subject : Tank Leakage <br /> Austin W.O. 88-4837 <br /> Dear Jody: <br /> It is our understanding that your site contains a double wall <br /> Xerxes 550 gallon under-ground Diesel tank, equipped with <br /> Universal Sensors and Devices Model LALS-1 Leak detector located <br /> at the bottom of the interstitial space of the containment volume <br /> of the tank. It is also our understanding that the leak detector <br /> senses 0 .25 inches of liquid. This tank was designed and <br /> installed for MCI in 1985 by other than the Austin Company. <br /> The following calculation, prepared at my direction, indicates <br /> the maximum leak into the interstitial space prior to detection <br /> is 0 .406 gallons. <br /> If I can be of further service , please call . <br /> Sincerely, <br /> Ll. 0-6_� <br /> Joe <br /> W. Hale <br /> Chief Mechanical Engineer <br /> JWH/bjj <br /> cc: Ray White , MCI Telecommunications Corporation <br /> Enclosure <br />