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is <br />WIE5EK <br />ARCHITECTS <br />P0. BOX 678, 50 WE5T 990 SOUTH <br />13RIGHAM CITY, UTAH 84302 <br />(801) 734-6507 <br />Fax (801) 734-6580 <br />Kasey Fuley 8-10-94 <br />Public Health Services <br />San Joaquin County <br />Environmental health Division <br />445 N. San Joaquin St. <br />Stocton, California 95201-2009 <br />Re: Flying J Travel Plaza, Ripon, CA. <br />AUG 1. 1 994 <br />ENVIRONMENTAL HEALTH <br />PERMIT/SERVICES <br />Dear Mrs. Fuley: <br />As per our phone conversation please allow this letter as confirmation that Flying j will provide and install <br />electronic monitoring of the intersticial space of the double wall storage tanks. this will be accomplished <br />through the use of an electronic sensor (part of the RLM9000 system) and a tank mounted hydrostatic <br />reservoir. With a standpipe affixed to the top of the reservoir, the sensor, a liquid level sensing unit, is <br />located in the reservoir. With the interstitial space and reservoir factory filled with liquid to a predetermined <br />level, a hydrostatic pressure is applied to the inner and outer tank walls. if a leak should ever occur in it <br />inner tank, the liquid level in the reservoir will drop as monitoring fluid drains into the primary tank. <br />Should a leak develop in the outer wall, the monitoring fluid will drain into the excavation and again lower <br />the level of the monitoring fluid. In any leak situation, a change in the liquid level beyond the acceptable <br />limits will activate the alarm. see attached. <br />If you have any questions or if I can be of any assistance please don't hesitate to contact me at <br />(801)734-6507 <br />Best <br />st <br />Wieser Architects <br />Project Manager <br />