HYDRO26980 - Laserfiche WebLink

Home Browse Search

•,Y C. DEFINITIONS OF TERMS (continued) PARTI Pemrit No. CO-0032638 Page No. 8 5. "Daily Maximum limitation" means the limitation for this parameter shall be applied as an instantaneous maximum (or, for pH or DO, instantaneous minim„m) value. The instantaneous value is defined as the analytical result of any individual sample. DMRs shall include the maximum (and/or minuraun) of all instantaneous values within the calendaz month. Any instantaneous value beyond the noted daily maximum limitation for the indicated pazameter shall be considered a violation of this permit. 6. "Grab" sample, is a single "dip and take" sample so as to be representative of the parameter being monitored. 7. "In-situ" measurement is defined as a single reading, observation or measurement taken in the field at the point of dischazge. 8. "Instantaneous" measurement is a single reading, observation, or measurement performed on site using existing monitoring facilities. 9. "Potentially dissolved (PD) metals fraction" is defined in the Basic Standards and Methodolo¢ies for Surface Water 1002-31, as that portion of a constituent measured from the filtrate of a water and suspended sediment sample that was first treated with nitric acid to a pH of 2 or less and let stand for 8 to 96 hours prior to sample filtration using a 0.40 or 0.45-UM (micron) membrane filter. Note the "potentially dissolved" method cannot be used where nitric acid will interfere with We analytical procedure used for the constment measured. 10, "Quarterly measurement frequency" means samples tray be collected at any time during the calendaz quarter if a continual discharge occurs. If the discharge is interrnittent, then samples shall be collected during the period that dischazge occurs. 11. "Recorder" requires [he-continuous operation of a chart and/or totalizer (or dunking water rotor meters or pump hour meters where previously approved.) 12. "Seven (7) day average" means the authmefic mean of al] samples collected in a seven (7) consecutive day peuod. Such seven (7) day averages shall be calculated for all calendaz weeks, which aze defined as beginning on Sunday and ending on Saturday. If the calendaz week 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 calendaz week shall be associated with the month that contains the Saturday. Samples may not be used for more than one (1) reporting period. 13. "Thirty (30) day average" means the arithmetic mean of al] samples collected during a thirty (30) consecutive-day period. The permittee shall report the appropuate mean of all self-monitoring sample data collected during the calendaz month on the Discharge Monitoring Reports. Samples shall not be used for more than one (1) reporting period. 14. "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 jor Chemical Analysis of Water and Wastes," U.S. Environmental Protection Agency, March 1979, or its equivalent. 15. "Total Recoverable Metals" means that portion of a water and suspended sediment sample measured by the total recoverable analytical procedure described in "Methods for Chemical Analysis of Water and Wastes, " U.S. Environmental Protection Agency, Mazch 1979 or its equivalent. 16. "Visual" observation is observing the discharge to check for the presence of a visible sheen or floating oil. 17. "Water Quality Contto] Division" or "Division" means the state Water Quality Control Division as established in 25-8-101 et al.) --- -- ------- -- - Qu -~;------- - §§ _~ Addrttonal relevant definitions are found in the Colorado Water all Control Act, CRS 25-8-101 et se .the Colorado Discharge Permit System Regulations, Regulation 61 (5 CCR 1002-61) and other applicable regulations. D. SPECIAL REQUIItEMENTS 1. Materials Containment Plan Pursuant to Sections 61.8(3)(g) and (r) of the Colorado Discharge Pemtit System Regulations, the permittee 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 afrer the effective date of this permit and must be implerrtented. The update of the plan shall include changes in the information and procedures for the prevention and contaitunent of spills of materials used, processed of stored at the facility wlirv h 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 occurred in the three 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;