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SPCC Plan:Ralph Hayes&San,Inc., 20177 S.McArthur Dr., Tracy,California(October 2020) 13 Response Center (1-800-4248802), which is staffed 24 hours a day. A summary sheet is included in Appendix E to facilitate reporting. All spills greater than one (1) gallon are required to be reported internally to the facility manager. In addition, 40 CFR 112.4 requires that whenever a facility discharges more than 1,000 gallons of oil in, a single event or discharges more than 42 gallons of oil in each of two discharge events within a I2-month period, the facility must inform the United States Environmental Protection Agency and the appropriate state agency (San Joaquin County Environmental Health Department)in charge of oil pollution control activities. 4. PREDICTION OF SPILL CHARACTERISTICS (REF. 112.7(b)) Where experience indicates a reasonable potential for equipment failure (such as during loading or unloading equipment,tank overflow,rupture, leakage,or human error),a prediction of the direction, rate of flow, and total quantity of oil which could be discharged from the facility as a result of each type of major equipment failure shall be provided. Surface flow patterns proximal to the ASTs are indicated in the Figures, RHS management does not believe that there is a reasonable potential for equipment failure such as tank overflow, rupture, or leakage. However, Table 5 presents spill scenarios which are considered to be "most likely" (although not necessarily probable) predictions of the oil spill events for each area storing oil in bulk containers greater than or equal to 55-gallons in capacity. Table 5: Potential Discharge Volumes and Direction of Flow Potential went Maximum Volume Maximum Direction of Flow Secondary Containment:: ;; Released,,(gallons}, Discharge Rat® Bulk Containment Structure(Tanks 1-4,Drums) Would likely remain within the secondary containment structure. Gradual to If the containment stntctttrc was Failure of AST 5C,5-10,000 also damaged,the oil would likely Sized secondary containment instantaneous travel towards the central portion structure Of the gravel-covewd yard and remain onsite. Tank Overfill 5 30 gallmin Would likely remain within the Sized secondary contninment secondary containment structure. structure Dispenser Hose Departure 5 5al/min Would likely remain next to the g containment Structure Sorbent materials Warehouse(Wanks 5-7) Gradual to Would likely remain within the Failure of AST l 10-1�5 instantaneous warehouse structure or next to the Double-walled tank _Ioadinv door Would likely remain within the Tank Overfill 5 30 gal/min warehouse structure or next to the Interior warehouse and sorbcnt loadin door materials 5. CONTAINMENT AND DIVERSIONARY STRUCTURES (REF. 112.7 (c)) Methods of secondary containment and diversionary structures at this facility include a combination of structures (e.g., sized secondary containment structures)as well as active spill response (e,g., sorbents, etc.) to prevent oil from reaching navigable waters and adjoining shorelines. The secondary containment systems of the facility are sufficiently impervious to McGinley Project:RHS001 McGinley&Associates Inc.