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ORDINANCE NO. 2012-007 (c), If a sampling procedure is not available or none of the approved procedures are appropriate for collecting the samples, the sampling organization, with the approval of the industrial user and control authority, shall identify and propose a method for use in accordance with Rule 62-160.220, F.A.C. (B) Sample collection. (1) Except as set forth in section 201.79(B)(2) of this part, the user must collect wastewater samples using 24-hour flow proportional composite collection techniques unless time -proportional composite sampling or grab sampling is authorized by the County Administrator. In addition, grab samples may be required to show compliance with instantaneous Limits. The reports required must be in compliance with Section 201.76 of this Ordinance and shall be based upon data obtained through sampling and analysis performed during the period covered by the report. These data shall be representative of conditions occurring during the reporting period. The control authority shall require a frequency of monitoring necessary to assess and assure compliance by industrial users with applicable pretreatment standards and requirements. ka the—eVc�t f18W ^ penie„al sampling isinfeasible, the county (2) , sulfides, and velatile GFga For all sampling required by this chapter, grab samples must be used for PH, cyanide, total phenols, oil and grease, sulfide, and volatile organic compounds. For all other pollutants, 24-hour composite samples must be obtained through flow -proportional composite sampling techniques, unless time -proportional composite sampling or grab sampling is authorized by the County Administrator . Where time -proportional composite sampling or grab sampling is authorized by the County Administrator, the sample must be representative of the discharge and the decision to allow the alternative sampling must be documented in the industrial user file for that facility. Using protocols (including appropriate preservation) specified in Chapter 62-160, F.A.C. and DEP-SOP-001/01, multiple grabs collected during a 24-hour period may be composited prior to analysis as follows: (a) Samples for cyanide total phenols, and sulfides may be composited in the laboratory or in the field. (b) Samples for volatile organics and oil and grease may be composited in the laboratory; or in the field. u Composite samples for other parameters unaffected by the compositing procedures may be authorized by the County Administrator, as appropriate. Coding: Words/letters/numbers underlined are additions to text; words/letters/numbers in stFiket#Feegil format are deletions to text. 31