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PARTI Page No. 10 Permit No.: CO-0038776 C. DEFINITIONS OF TERMS (continued) I5. "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 for Chemical Analysis of Water and Wastes," U.S. Environmental Protection Agency, Mazch 1979, or its equivalent. 16. "Total Recoverable Metals" means that ponion of a water and suspended sediment sampple measured by the total recoverable analytical procedure described in "Methods for Chemical Analysis of Water and Wastes, " U.S. Environmental Protection Agency, March 1979 or its equivalent. 17. "Twenty four (24 hour composite" sample is a combination of at least eight (8) sample aliquots of at least 100 milliliters, collected at equally spaced intervals during the operating hours of a facility over atwenty-four (24) hour period.. For volatile pollutants, aliquots must be combined in the laboratory immediately before analysis. The composite must be flow proportional; either the time interval between each aliquot or the volume of each aliquot must be proportional to either the wastewater or effluent flow at the time of sampling or the total wastewater or effluent flow since the collection of the previous aliquot. Aliquots may be collected manually or automatically. 18. "Twice Monthly" monitoring frequency means that two samples shall be collected each calendar month on sepazate weeks with at least one full week between the two sample dates. Also, there shall be at least one full week between the second sample of a month and the first sample of the following month. 19. "Visual" observation is observing the dischazge to check for the presence of a visible sheen or floating oil. 20. "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 ualiry Control Act, CRS §§ 25-8-101 et seg•, the Colorado Discharge Permit System Regulations,Regulation 61 (5 CCR 1002-61~ and other applicable regulations.-. D. SPECIAL. REQUIREMENTS 1. Materials Containment Plan Pursuant to Sections 61.8(3)(1:) and (r) of the Colorado Discharge Permit System Regulations, the permittee is required to submit a Materials Containment Plan. ~-SSuch a plan was previously submitted to the Division. An update of the plan shall be subrmtted to the Division within ninety (90) days after the effective date of this pemait and riust be impplemented. 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 faciht~ which if spilled would have a reasonable probability of having a visible or otherwise detrimental impact on waters of the State -/-. The updated plan shall include, but not necessarily be limited to: a. An updated history of the spills which have occuned in the three (3) years preceding the effective date of this pemtit. The history shall include a discussion on the cause of the spills and a tfie preventative measures designed to eliminate them from reoccurring; b. An update of the reporting system which will be used to notify, at a minimum, responsible facility management, the Division, the Environmental Protection Agency, downstream water users within 5 miles downstream of the facrlity, 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 ctuxent list which includes the volttmes 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; f. A cunent list of available outside contractors, agencies, or other sources which could be utilized in the event of a spill in order to cleanup its effects. If the facility is capable of handling spills in-house, this shall be documented in the plan; g. Provision for yeazly review and updating of the contingency plan, plus resubmission of the plan to the Division if conditions and/or procedtues at the facility change the original plan. The foregoing provisions shall in no way render inapplicable those re ltirements imposed by the Federal Water Pollution Control Act, 33 U.S.C. § ]321, regulations promulgated thereunder, the Colorado Water Quality Control Act, and regguulations promulgated theretmder. It is recommended that this plan be prepared by a professional engineer registered m the State of Colorado. Nothing herein contained shall be construed as allowing any dischazge to waters of the State other than through the discharge points specifically authorized in this permit. Nothing herein contained shall be constmed as excusing any liability the permittee might have, ctvtl or rnm,nal, for any spill. The submittal of a Spill Prevention Control and Countermeaslue Plan (SPCC Plan) as required by 40 CFR Part 112 ma satisfy all or part of this requirement. Should additional materials exist on site which aze not addressed m the SPCC Plan, addressing those materials as per the above is required. 1/ If there is no such material present at the site, this shall be indicated in writing and submitted to the Division for review. 2/ If there is material presrn[ but the permittce feels [here is not a reasonable probability of a spill impacting waters oC the State, this shall be documented in writing and submitted to the Division for review. This documrntation shall include; I) distance [o nearest surface waters, and; 2) a detailed description of any strucNre which pmh,bits the release of material onto the Bound or into a conveyance system Revised 4/19/2004