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Tracy Material Recovery&Transfer Station SPCC Plan 3.3 Facility Drainage Facility drainage includes a storm water runoff drainage system with over 13 storm inlet locations across the site(Figure 2). The storm drains in the Facility parking area eventually drain to the lined, onsite evaporation/collection pond which does not discharge to surface waters from the site. It is unlikely that storm drains would be impacted by a release from an AST because: • The storm drains are all more than 80 feet away from the ASTs located at the exterior of the shop building; • TMR has staged spill response equipment near the tanks and work areas;and • Each truck in the parking area is equipped with spill equipment • A significant release would likely occur in the presence of, and be intercepted by, Facility personnel. • When the ASTs are filled or emptied, the delivery truck will be monitored by personnel for. • Spill prevention measures are designed to reduce or eliminate the flow of petroleum products into the storm drain system,and ultimately the storm water detention basin. In the event of a minor spill, spill absorbent material or booms will be applied immediately to prevent further migration of the material, followed by immediate cleanup of absorbent material. Spill response materials are staged in the shop building and at various locations throughout the property. In the event of an unexpected large quantity release in the areas of petroleum product storage, arrangements must be made to remove the contents from the containment areas manually via vacuum pumping per 40 CFR §112.7(e)(1). As a good management practice, an outside spill response firm will be contacted with an established protocol for spill cleanup (See Section 5.4). They will have the necessary training and equipment to handle larger releases. 3.4 Engineering Controls The ASTs are constructed of steel using double-walled containment, or are single-walled with secondary containment structures. The double-walled tanks consist of a fully welded/fully sealed tank inside another fully welded/fully sealed tank. The secondary containment space between the two tanks is designed to accommodate 110%of the capacity of the inside tank. In accordance with 40 CFR §112.8(c), TMR bulk storage tanks are constructed of a material compatible with the contents stored in the tanks and the conditions of storage. Secondary containment is provided for the entire contents of each single tank. Concrete areas are October 2019 3-8