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SWi~, Guidance Page 4 <br />This azea will cover all industrial activities at the site which have the potential to contaminate stormwater. This <br />ies not only industrial processes, but also routine maintenance activities involving fertilizers, pesticides, <br />__wrgents, solvents, oils, etc. It is a good idea to discuss each activity sepazately. <br />Judge the potential for the material to be found in stormwa[er, using the criteria listed above. Other potential <br />factors to consider include the following: <br />- the intensity of the activity (i.e., does it occur every day, or just once a yeaz, etc.) <br />- the size of the area over which the activity takes place, the surface type (pavement, gravel, vege*ation, etc.), <br />and other physical chazacteristics such as slope <br />- ability of product storage and loading/unloading facilities (fuel tanks, drum storage, etc.) to contain spills and <br />leaks <br />- the concentration and toxicity of materials which can be expected to be found in the facility's stormwater runoff <br />- the contamination of storage facilities with the substances being stored (e.g, used oil drums or tanks coated with <br />spilled oil) <br />- the visibility of any potential problems (e.g., how close is the storage tank to the operations bui]ding) <br />Where potential stormwater contamination sources aze identined, appropriate preventive measures must be taken <br />and documented. These should be discussed under the BIvIPs description, below. The purpose of the SWivlp is to <br />reduce or eliminate these sources; therefore, most of the remainder of the SWMP tazges them. <br />Significant materials include, but aze not limited to: raw materials; fuels; materials such as metallic products; <br />hazazdous substances designated under section 101(14) of CERCL~; any chemical the facility is required to report <br />rant to section 313 of title III of S?.RA; fertilizers; pesticides; and waste products such as ashes, slag and <br />..uee chat have the potential to be released with stormwater dischazge. <br />"Significant" spills include, but aze not limited to, releases of oil or hazazdous substances in excess of reportable <br />quantities under section 311 of the Clean Water Act (see 40 CFR 110.10 and CFR 117.21) or section 102 of <br />CERCL~ (see 40 CFR 302.4). Other sittttificanc spills would include spills that could potentially add substantial <br />amounts of pollutants to the environment. For instance, chronicaIly repeated smaller spills can constitute <br />significant spills if taken toeether. In addition, spills of materials besides hazazdous substances and oil should be <br />addressed if they pose a pollution potential to stormwater. <br />List the substance(s) spilled or leaked, the approximate quantities involved, where and when it occurred, and what <br />was done in response. If there have not beea any such events, make ¢ote of it. <br />The descripHan of the B~LIPs shall include: <br />1) Stormwater diversion: Describe how and where stormwater will be diverted away from industrial <br />areas to prevent starmwater contamination. <br />3) Materials handling and .gpill yrevention: Where materials carz impact stormwater runoff, existing <br />practices that reduce the potential far contamination shall be described. For example, materials <br />shall be stared and handled in covered areas to prevent contaU wish srormwater, and chemicals <br />shall be stored within berms or secondary containment devices to prevent leaks and spills from <br />entering stormwater runoff. <br />