1996-05-06_HYDROLOGY - M1977378 - Laserfiche WebLink

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rart I Page No. 7 Permit No.: CO-0044768 The present lowest method detection limits for specific parameters(which have limitations which are,in some cases,less than or equal to the detection limit)are as follows: Arsenic 0.01 mg/Q Benzene 0.001 mg/Q Total Residual Chlorine 0.05 mg/Q Cadmium 0.001 mg/Q Chromium 0.01 mg/Q Chromium,Hexavalent 0.01 mg/9 Copper 0.005 mg/9 Lead 0.005 mg/9 Total Mercury 0.00025 n.g/Q Nickel 0.05 mg/Q — Selenium 0.01 mg/Q Silver 0.0002 mg/1 Zinc 0.01 mg/Q These limits apply to the total recoverable or the potentially dissolved fraction of metals. For hexavalent chromium,samples must be unacidified so that dissolved concentrations will be measured rather than potentially dissolved concentrations. Procedure for determining settleable solids is contained in 40 CFR 434.64. The method detection limit for measuring settleable solids under this part shall be 0.4 m1/1. 4. Records The permittee shall establish and maintain records. Those records shall include the following: a. The date,type,exact location,and time of sampling or measurements; b. The individual(s)who performed the sampling or measurements; c. The date(s)the analyses were performed; d. The individual(s)who performed the analyses; e. The analytical techniques or methods used; f. The results of such analyses;and g. Any other observations which may result in an impact on the quality or quantity of the discharge as indicated in 40 CFR 122.44(I)(1)(iii). The permittee shall retain for a minimum of three(3)years records of all monitoring information,including all original strip chart recordings for continuous monitoring instrumentation,all calibration and maintenance records,copies of all reports required by this permit and records of all data used to complete the application for this permit. This period of retention shall be extended during the course of any unresolved litigation regarding the discharge of pollutants by the permittee or when requested by the Division or EPA. 5. Signatory and Certification Requirements a. All reports and other information required by the Division,shall be signed and certified for accuracy by the permittee in accord with the following criteria: (1) 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 facility from which the discharge described in the form originates; (2) In the case of a partnership,by a general partner, (3) In the case of a sole proprietorship,by the proprietor;