REP42616 - Laserfiche WebLink

Home Browse Search

PART I Page 3 of 19 C. FOOTNOTiS 7. A "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 a twenty-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 Lime of sampling or the total wastewater or effluent flow since the collection of the previous aliquot. Aliquots may be collected manually or automatically. f/ - In the event an oil sheen, or floating oil is observed, a grab sample shall be collected, analyzed, and reported on the appropriate DMR. In addition, corrective action shall be taken immediately to mitigate the discharge of oil and grease. A description of the corrective action taken should be Sncluded with the DMR. • g/ - Where based on a minimum of 5 samples, the permittee demonstrates, to the satisfaction of the Water quality Control Division, that the level of total dissolved solids (TDS) is the effluent can be calculated based upon the level of electrical conductivity, the permittee may measure and report TDS in terms of electrical eonductivity. h/ - TDS shall be sampled on a monthly basis until siz samples have been analyzed. A report of "No Discharge" shall not be counted as one of the siz samples. Thereafter, monitoring shall continue on a quarterly basis. Following submittal of the initial siz sets of monthly data, the Division shall determine whether the permittee is required Co submit a report addressing salt removal in accordance with 8egulatioas Por Implementation of the Colorado River Salinity Standards Through the NPDES Permit Program, 3.10.0. If the salinity report 1s required, the Division shall so advise the permittee by letter and the report shall be submitted within 180 days. i/ - This parameter is subject to "Noncompliance Notification" requirements of Part II.A.3.Cb)(v) of this permit. j/ - 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 ml/1. k/ - Should a precipitation event occur which is greater than the LO-year, 24-hour event, the permittee shall submit rai^ gauge or other appropriate documeata[ion.i^ order Eor an exemption to be claimed. In lieu of such documentation, limitations contained in Part I.A.1.(b), shall apply. Documentation shall be reported as an attachment to the Discharge :9onitoring Report for the appropriate period. Code: i - 16 Date: 1-84, revised 10-88, revised 12-88