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9.0 CONTAINMENT AND DIVERSION STRUCTURES - §112.7(c) Secondary containment structures specific to the storage and usage areas at the facility are discussed in Section 5.0 and Table 3. The following is a summary of preventive systems used at the facility to prevent a discharge of oil from reaching a navigable water course. 9.1 Onshore facilities-U12.7(c)(1) The primary goal of spill response is to contain spills on the smallest paved area possible,thus preventing spilled materials from flowing into a storm sewer inlet, drainage ditches or onto surrounding soil. To prevent spills not contained by secondary containment structures from migrating,the following procedures may be used: 1. Immediately stop the leak by closing valves, shutting off a pump, or righting a drum. 2. Covering storm sewer inlets with drain covers. 3. Construct dikes of absorbent or earthen materials at the leading edge or down gradient of the spill to prevent its advancement. 4. If a storm inlet, drainage ditch or floor drain is down gradient of a spill,place oil-absorbent booms around the inlet or drain plugs over the inlet to prevent the spill from entering the sewer. 5. If recovery of spilled product is an option, spills should not be contained by being covered with absorbents. Containing a spill in a pool, in a depression or behind a dam is preferable to containment with absorbents. Covering spilled material with absorbents creates additional contaminated materials and increases the costs of disposal. Spills that threaten to flow to drainage pathways may be covered with absorbents or absorbent booms if other means of containment have failed. A spill may also be covered with absorbent if it is too shallow to allow product recovery. Containment of Spills in Drainage Ditches or Storm Sewer As discussed in Section 5.0, all spills reaching the storm sewer drains would be discharged to the storm water drainage ditch and would be captured at SCP-6 before entering the city drainage system. This drainage ditch is the only path by which a surface spill can migrate off site. In the event of a spill,booms would be placed at the SCP as determined by a visual inspection and knowledge of low areas. The individual discovering the spill should immediately stop the source of the spill, if possible and if it is safe to do so. This may involve turning containers upright,closing valves or shutting off equipment. Only trained personnel should perform operations requiring contact with or proximity to spilled oil products. The Material Safety Data Sheets(MSDS)for the material spilled should be reviewed for potential hazards, proper personnel protection equipment and appropriate spill response procedures. Facility personnel are to contain the spill if it can be done safely and then contact the Equipment Service Center Manager or designee. Depending on the volume of the spill, viscosity of the liquid spilled,volume of surface water runoff being carried through the sewer or ditch at the time of the spill and the size and slope of the storm sewer, it may take some time for the spill to reach the discharge point. If the material has entered a drainage ditch an oil- absorbent boom can be placed along the ditch or pumps can be used to remove the spilled material. The Terminal's emergency response contractor will clean up significant spills. (Appendix A). 9.2 Offshore facilities-&112.7(c)(2) This facility does not have a non-transportation related offshore facility. Therefore, this section is not applicable. 30