Ord 2011-013 - Laserfiche WebLink

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. grease, the samples may be composited in the laboratory. Total residual chlorine, pH, and temperature samples cannot be "composited" under any circumstances. Composite samples for other parameters unaffected by the compositing procedures as documented in approved EPA methodologies may be authorized by the City, as appropriate. In addition, grab samples may be required to show compliance with Instantaneous Limits. 2. Samples for oil and grease, temperature, pH, cyanide, total phenols, sulfides, and volatile organic compounds must be obtained using grab collection techniques. 3. For sampling required in support of baseline monitoring and 90 -day compliance reports required in Section 86.127 (A) and 86.127 (C) [40 CFR 403.12(b) and (d)], a minimum of four (4) grab samples must be used for pH, cyanide, total phenols, oil and grease, sulfide and volatile organic compounds for facilities which historic sampling data do not exist; for facilities for which sufficient historical sampling data are available, the Director may authorize a lower minimum. Where there has been a change to existing Industrial Users, historic data that does not represent the current discharge would not be able to be used to justify a lower minimum of grab samples. For the reports required by Section 86.127 (D) [40 CFR 403.12(e) and 403.12(h)], the Industrial User is required to collect the number of grab samples necessary to assess and assure • compliance with applicable Pretreatment Standards and Requirements. K. Date of Receipts of reports Written reports will be deemed to have been submitted on the date postmarked. For reports, which are not mailed, postage prepaid, into a mail facility serviced by the United States Postal Service, the date of receipt of the report shall govern. L. Recordkeeping Users subject to the reporting requirements of this ordinance shall retain, and make available for inspection and copying, all records of information obtained pursuant to any monitoring activities required by this ordinance, and any additional records of information obtained pursuant to monitoring activities undertaken by the User independent of such requirements, and documentation associated with any Best Management Practices established under Section 86.119. Records shall include the date, exact place, method, and time of sampling, and the name of the person(s) taking the samples; the dates analyses were performed; who performed the analyses; the analytical techniques or methods used; and the results of such analyses. These records shall remain available for a period of at least three (3) years. This period shall be automatically extended for the duration of any litigation concerning the User or the City, or where the User has been specifically notified of a longer retention period by the Director. 33