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15 February 2016 AdvancedGeo AGE Project No. 12-2181 Environmental Page 8 of 23 2.10. EVALUATION OF DISCHARGE POTENTIAL The SPCCP includes an evaluation of any discharge potential to adjoining shorelines and/or navigable waters. 2.10.1 . Distance to Navigable Waters and Adjoining Shorelines and Flow Paths The Facility is located on relatively level terrain. Drainage generally flows towards the center of the Facility, or towards the west in centrally located concrete swales, then northwest. The facility was constructed with the AST system (fuel, oil and waste oil storage) within a 100 foot by 70 foot secondary containment pad with collection into a three-stage oil water separator, draining into the City of Manteca sewer system. MVE is responsible to prevent and abate oil spills with intent not to discharge petroleum into the municipal sewer system; the secondary containment drainage pad does not discharge to the public nor private stormwater system connected to a surface water body. The Facility drainage travels through subsurface pipe and centrally located concrete swales to a surface water retention pond at the western end of the Facility. Spill trajectories are indicated on Figure 2. There is one main storm drain located on-site, at the western end of the Facility. Approximately 95 percent of the Facility's ground surface area is concrete; asphalt paved or has structure roof cover. The remainder consists of soil, compacted gravel, grass and low-lying vegetation. 2.10.2. Discharge History The Facility has not had any discharges since the last revision of this SPCCP. Table 4 summarizes the Facility's discharge history. 3.0. DISCHARGE PREVENTION - GENERAL SPCC PROVISIONS The following measures are implemented to prevent oil discharges during the handling, use or transfer of oil products at the Facility. Oil-handling employees have received training in the proper implementation of these measures.