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PA• I Page 16 of 40 Permit No.: CO-0034665 C. Specific Limitations and Self-Monitoring Requirements 4. Storm Water Pollution Prevention Plan (Continued) (ii)FOr each area of the facility that generates storm water discharges associated with industriaal activity with a reasonable potential for containing significant amounts of pollutants, a prediction of the direction of flow; and an identification o`f the types of pollutants whi~h are likely to be present in storm water discharges associated with industrial activity. Factors to consider include the toxicity~of chemical; quantity of chemicals used, produced or discharged; the likelihood of contact with storm water; and history of significant leaks or sills of toxic or hazardous pol~lutaata. Flows with a significant potential for causing erosion shall be ii3entified. t J/-~ ~ (b) Inventory of Ex~sed Materials. An inventory of the types of materials handled ate the site that potentiallyimay be exposed too precipitation. Such inventory shall include a narrative description of significant materials that have been ,~ handled, treated, stored or disposed in a ~ manner to allow exposure to storm water ~, between the time of 3 years prior to the ~ date of the issuance of this permit and the j present; method and location of on-site storage or disposal; materials management practices employed to minimize contact of materials with etornt water runoff between the time of 3 years prior to the date of the issuance of this permit and the present; the location and a description of existing structural and non-structural control measures to reduce pollutants in storm water runoff; and a description of / any treatment the storm water receives. c/ (c) S~illa and Leaks. A list of significant apilla and significant leaks of toxic or hazardous pollutants that occurred at areas that are exposed to precipitation or that otherwise drain to a storm water conveyance at the facility after the date of 3 years prior to the effective date of this permit. Such list shall be updated as appropriate during the term of the permit.