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PART I Page x Permit No. CO-0043567 C. DEFiN1TlONS OF TERMS 6. 'In-situ" measurement is defined as a single7eading, observation or measurement taken in the field at the point of discharge. 7. 'Instantaneous" measurement is a single reading; observation, or measurement performed on site using existing monitoring facilities. B. "Quarterly measurement frequency' means samples may be collected at any time during the calendar quarter if a continual discharge occurs. If the discharge is intermittent, then samples shall be collected during the period that discharge occurs. 9. "Seven (7) day average" means, with the exception of fecal colifurm bacteria, the arithmetic mean of all samples collected in a seven (7) consecutive day period. For fecal coliform bacteria, it is the geometric mean of all samples taken in a seven (7j consecutive day period. Such seven (7) day averages shall be calculated for all calendar weeks, which are defined as beginning on Sunday and ending on Saturday. If the calendar wrzk overlaps two months (i. e. the Sunday is in one month and the Saturday in the following month), the seven (7) day average calculated for that calendar week shall be associated with the month that contains the Saturday. Samples may not be used for more than one (I) reporting period. (Not applicable to fecal colifotm detemtinanons.) 10. "Thirty (30) day average" means, except for fecal coliform bacteria, the arithmetic mean of all samples collected during a thirty (30) consecutive-day period. For fecal coliform bacteria, it is the geometric mean of all samples collected in a thirty (30) day period. The perntittee shall report the appropriate mean of all self-monitoring sample data collected during the calendar month on the Discharge Aonitoring Reports. Samples shall not be used (or more than one (1) reporting period. I I. "Visual" observation is observing the dischsrge to check for the presence of a visible sheen or floating oil. R. "Water Quality Control Division' or 'Drviswn' means the state Water Quality Control Division as established in 25-8-l01 et al. D. REPORTING I. Sie nalurv Requirements All reports required For submittal shall be signed and certified for accuracy by the pennittee m accord with the followine criteria: a) In the case of corporations, by a principal executive officer of at least the level of vice-president or his or her duly authorized representative, if such representative is responsible for the overall operation of the Cacility from which the discharge described in the Form oneinates; h) In the cast of a partnership, by a general partner; c) In the cast of a sole proprietorship, by the proprietor; d) In the case of a municipal, stale, or other public facility, by either a principal executive officer, rankine elected offici:d. or other duly authorized employee. IC. SPECL~L REQUIREMENTS I. Materials Containment Plan Pursuant to Sections 6.9.3 (S) and (6)(b) of the Regulations for the State Discharee Permit Svstem, the pennntee is required to submit a Al atenals Containment Plan. Such a plan was previously submitted to the Dn'ison. An update of fire plan shall he ,uhnutted to Ihr Pernuts and Enforcement Section, Water Quality Control Division +viihm nineev (90) days alter the el (ech+~c date of this permit and must be implemented. The update of the plan shall include chsnees in the infixmatinn and pru~_rdurc~ Cur the prevention and COnlalnmeRl Uf spills pF maldrlal$ Used, prOCe55cd Or stared at the facdity u•hr,h if spilled +ouuld have a reasonable probebibty of having e visible or otherwise detrimental impact on +catars of the State I/ ?/. Thr upd~atcd plan shall include, but not necessaril}' be limited to: :q An updated history of the spols +vhlch have occurred in thu three (3) yeah precedme the effective d:dc of (his perms t. Thr his'inry shell include a discussion on the cause of the spills and a the prevenn+tive measures dzsicncd to zlimin:uc them from reoccurrinc;