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Shaw9ironmental & Infrastructure, Inc. <br /> 4005 Port Chicago Highway <br /> Concord, CA 94520-1120 <br /> 925.288.9898 <br /> Fax 925.288.0888 <br /> ShaW The Shaw Group Inc.- <br /> November <br /> o <br /> November 27, 2002 <br /> i� r <br /> � ' <br /> Mr. Dennis Catanyag <br /> San Joaquin County Environmental Health <br /> 304 East Weber Avenue, Third Floor mgr <br /> Stockton, California 95202 <br /> Subject: Scope of Work for Proposed Temporary LIST Closure Activities, Pacific Bell <br /> Facility,4051 Newton Road, Stockton, California <br /> Dear Mr. Catanyag: <br /> On behalf of Pacific Bell, Shaw Environmental Inc. (Shaw) is pleased to present this scope of <br /> work pertaining to proposed temporary underground storage tank (TEST) closure activities at the <br /> above-mentioned Pacific Bell facility. There is a 10,000-gallon LIST containiug gasoline at that <br /> site that Pacific Bell would like to take out of service pending future removal. The following <br /> scope of work details anticipated closure activities to be performed in order to meet the State of <br /> California Code of Regulations Title 23, Division 3, Chapter 16, Section 2671 UST temporary <br /> closure regulations and the County of Lake Health Department closure requirements. The permit <br /> application is included in Attachment 1. Copies of the State of California forms are included in <br /> Attachment 2. <br /> Scope of Work <br /> Prior to temporary closure activities, Pacific Bell will arrange for the removal of any fuels within <br /> the UST system. Prior to performing any work, Shaw personnel and their subcontractors will <br /> review the health and safety plan (Attachment 3). The UST and associated piping will then be <br /> triple-rinsed by a hazardous-certified subcontractor using a hot-pressure washer and detergent in <br /> order to remove any residual liquids, solids, or sludge. Following rinsing, the tank will be <br /> visually inspected to ensure all liquids, solids, or sludge have been removed. The rinsate will <br /> then be transported off-site under a hazardous waste manifest to Romic Environmental <br /> Technologies Corporation in East Palo Alto, California for recycling. A copy of the rinsate <br /> manifest will be forwarded to the San Joaquin County Environmental Health upon receipt <br /> Following rinsing activities, the atmosphere of the tank will be inerted using dry ice at a rate of <br /> approximately 20 pounds per 1,000-gallons capacity. After approximately 15 minutes, the lower <br /> explosive limits (LEL) and oxygen concentrations will be measured. Once the LEL and oxygen <br /> concentrations are below 10%,the tanks access ports will be sealed using locking caps. The vent <br /> pipe will not be sealed per UST temporary closure requirements. The power will then be <br /> disconnected from the fuel dispensers and locked out. The existing tank monitoring system will <br /> remain operational. <br />