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r <br /> Environn e tal '" w <br /> Science & ENVIRON" TINTAL HEALTH <br /> Engineering,Inc. ; ..1 �: ,���, <br /> A CILCORP Company <br /> 93 JU.1 -•8 PH 1: 34 <br /> June 3, 1993 <br /> Project 6-92-5400 <br /> Mr. Michael Infurna <br /> San Joaquin County Environmental Health <br /> P.O. Box 2009 <br /> Stockton, CA 95201 <br /> SUBJECT: Fueling Island 3535 E. Cherokee Road, Stockton, CA <br /> Dear Mr. Infurna: <br /> Environmental Science & Engineering, Inc. (ESE) on behalf of Cecchini, Cecchini, and <br /> Giovannoni propose to treat ground water purged from well UST-1 at the truck wash facility <br /> adjacent to the fueling island at the subject site. The truck wash is owned and operated b <br /> Central Valley Steam Cleaning (dba "The Wash Rack"). The truck wash has a business <br /> license in San Joaquin County and is permitted to operate as a truck wash with a water <br /> treatment system. In its normal operating procedure, the truck wash cleans large semi-truck <br /> and tractor-trailers. After washing a truck, the water contains a significant amount of oil <br /> and grease, diesel fuel, lubricants, and other truck related constituents. The wash water is <br /> then treated and recycled. The following section describes the truck wash treatment system: <br /> Steam is created from water and used for truck washing in a contained building. <br /> From the truck wash, water enters a holding tank. From the holding tank the water <br /> enters a cone tank where flocculent is added. Water and sludge are separated in the <br /> cone tank. Flocculent and sediment enters a bio-augmentation tank where material <br /> is held for 6-8 hours where microbes digest hydrocarbons. The resulting sludge is <br /> placed in a 55-gallon drums and dried in the open air. Once the sludge is dried, it <br /> is hauled by Falcon Energy to a recycler. Approximately four drums of sludge are <br /> generated per year. <br /> The clear water from the cone tank flows though an ozone generator then a reverse <br /> osmosis unit and then a five micron filter. Once through the filter, the water is <br /> reused in the steam cleaner. <br /> The current throughput of water at the truck wash is approximately 1,200 gallon per day. <br /> Approximately 400 gallons of water is added to the system on a"busy" day because of water <br /> loss thorough evaporation. The maximum capacity of the existing system is based on the <br /> flocculent process which is estimated a 500 gallons per hour or 12,000 gallon per day (24- <br /> hour day). <br /> 4090 Nelson Avenue,Suite J Concord,CA 94520 Phone(510)685-4053 Fax(510)685-5323 <br />