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Part I Page No. 5 Permit No.: CO-0027529 C. DEFINITIONS OF TERMS 8. "Total Metals" means the concentration of metals determined on an unfiltered sample following vigorous digestion (Section 4.1.3), or the sum of the concentrations of metals in both the dissolved and suspended fractions, as described in "Manual of Methods far Chemical Analysis of Water and Wastes," U.S. Environmental Protection Agency, March 1979, or its equivalent. 9. "Visual" observation is observing the discharge to check for the presence of a visible sheen or floating oil. 10. "Water Quality Control Division" or "Division" means the state Water Quality Control Division as established in 25- 8-101 et al.) Additional relevant definitions are found in the Colorado Water Quality Control Act, CRS " 25-8-101 et sue., the Regulations for the State Discharge Permit System, 5 CCR 1002-2, ' 6.1.0 et sec and other applicable regulations. D. SPECIAL REQUIItEMENTS 1. Materials Containment Plan Pursuant to Sections 61.8(3)(g) and (r) of the Colorado Discharge Permit System Regulations, the petmittee is required to submit a Materials Containment Plan. Such a plan was previously submitted to the Division. An update of the plan shall be submitted to the Division within ninety days after the effective date of this permit and must be implemented. The update of the plan shall include changes in the information and procedures for the prevention and containment of spills of materials used, processed or stored at the facility which if spilled would have a reasonable probability of having a visible or otherwise detrimental impact on waters of the State !' y. The updated plan shall include, but no[ necessarily be limited to: (a) An updated history of the spills which have occurred in the three (3) years preceding the effective date of this permit. The history shall include a discussion on the cause of the spills and a the preventative measures designed to eliminate them from reoccurring; (b) An update of [he reporting system which will be used to notify, at a minimum, responsible facility management, .the Division, the Envirortc~enral Protection Agen,,y, downstream water users within 5 miles downstre^m of the facility, and local health officials; (c) A description of any changes in the preventative facilities (including overall facility plot) which prevent, contain, or treat spills and unplanned discharges; (d) A current list which includes the volumes or quantities of all materials used, processed, or stored at the facility which represent a potential spill threat to surface waters. The location of stored material shall be indicated on the facility plot submitted for item c; (e) An implementation schedule for additional facilities which might be required in item c, but which are not yet operational; (fl A current list of available outside contractors, agencies, or other sources which could be utilized in the event of a spill in order to clean up its effects. If the facility is capable of handling spills in-house, this shall be documented in the plan; (g) Provision for yearly review and updating of the contingency plan, plus resubmission of the planto the Division if conditions and/or procedures at the facility change the original plan.