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1 <br /> OUfmySILVER MwES <br /> Part 4: Discharge Prevention — SPCC Provisions for Onshore Facilities <br /> (Excluding Production Facilities) <br /> 4.1 Facility Drainage (40 CFR 112.8(b)) <br /> The 10,000 gal Diesel Tank and 1,000 gal Unleaded Tank (C-1) are the only hydrocarbon storage <br /> structures on site that are uncovered and exposed to the weather. These are double-walled <br /> tanks and the secondary containment is not subject to a precipitation event. <br /> If any secondary containment does contain water, only clean water may be removed. If any <br /> visible hydrocarbon is present, the contaminated water will be disposed of in an approved <br /> manner as discussed in Part 5 of this Plan. <br /> Sheen inspections can only be conducted by Environmental Department personnel,the Safety <br /> Superintendent or the Site Manager. Contaminated water must be pumped into a labeled <br /> container with a securely fitted lid and removed by a licensed disposal company. <br /> A log of contaminated water pumping will be maintained by the Environmental department and <br /> filed in a central location. <br /> 4.2 Bulk Storage Containers (40 CFR 112.8(c)) <br /> Table 4.1 summarizes the construction, volume and content of bulk storage containers on site. <br /> Table 4A Construction Standards <br /> Tank Construction Standard Capacity(gal) Contents <br /> C-1 Shop built double walled steel tanks j 10,000& 1,000 Diesel/unleaded <br /> C-3 Steel drums 55 Oil/lubricants <br /> C-4 Steel drums 55 Used oil <br /> C-5 Shop built steel tank 500 Diesel <br /> C-6 Steel drums 55 Oil/lubricants <br /> C-7 Steel drums 55 Oil/lubricants <br /> C-8 Shop built steel tanks 9,200&smaller Controlled chemicals <br /> C-9 Shop built double walled steel tank 10,000 Diesel <br /> C-10 Steel drums 55 Oil/lubricants <br /> C-11 Steel drums 55 Oil/lubricants <br /> Spill Prevention Control and Countermeasure Plan 21 P a g e <br />