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111111110 .� SCOPE OF WORK Costco Gasoline-Fuel Additive Program Costco Wholesale is seeking a permit to install a 1,500-gallon underground fuel additive storage tank at their existing Costco Gasoline fueling facility. The purpose of the underground tank is for the storage and dispensing of a proprietary fuel additive into the gasoline product. The fuel additive is a Class I-C flammable liquid. The fuel additive is a fuel enhancement to improve fuel efficiency and engine performance. Most retail gasoline includes additives that have solvent/lubricant mixture compositions that are unique to that particular brand. While the mixture is proprietary it is similar to the additives used by other petroleum companies. This product meets the requirements of the U.S. Environmental Protection Agency(EPA) and California Air Resources Board (CARB)for additives. The 1,500-gallon tank is of double-wall fiberglass construction with double wall monitored fiberglass containment sump. Delivery of this product to the site will occur via delivery tanker trucks. From the delivery tanker truck the additive is transferred to the underground storage tank by positive pressure operation through flex piping and tight fill connection. Before gasoline is brought to the site and delivered into the existing underground gasoline storage tanks (UGST) the "Costco Gasoline" attendant will program the new batch controller panel in the controller enclosure to inject a pre-determined amount of additive into the fill riser of each individual gasoline tank (e.g., 3.5 gallons of the liquid additive into Tank#1, etc.). Once the additive is in the UGSTs, the gasoline product is then delivered into the tanks resulting in the combined additive-gasoline mixture. The specific scope of the work to be performed as part of the underground installation is as follows: • Install one (1) 1,500-gallon double-wall fiberglass underground tank for Class I-C liquid. • Replace existing tank manway lids at each existing gasoline fill sump to include additional bungs. • Install 2" double-wall fiberglass product manifold line from new 1,500-gallon additive tank, to the existing gasoline fill containment sumps and 2" double-wall fiberglass vent line from new 1,500-gallon additive tank, to the new vent stack location. New piping interstitial space is to be continuously monitored with vacuum. • Install new concrete slab over new underground tank. • Install fill/spill containment assembly and fittings on new underground additive tank, along with new Veeder-Root electronic annular sensor and automatic tank level gauge, and program for high level alarm. • Install "Flow Dynamics" Batch controller panel in the existing controller enclosure. • Install a flow meter at the new 1,500-gallon additive tank turbine's discharge. • Install one (1) new 24-volt solenoid valve at each existing gasoline fill sump. • Install one (1) conduit and wiring for electrical power to solenoid valves at existing gasoline fill sumps. Install one (1) conduit with power wiring to new 1,500-gallon additive tank for turbine pump power. Install one (1) new conduit and data wiring to new 1,500-gallon additive tank for flow meter sensor. Install one (1) conduit and wiring to 1,500-gallon tank for annular monitoring and automatic tank gauge. New conduits to be equipped with seal-offs at hazardous zones. • Install new double wall vent transition sump with Veeder-Root sensor at lowest point. • Adjust landscaping and restore as required (when applicable). • Patch and repair asphalt as may be required. 6213 CA scope Class I-C liquid-option 3.doc