§ 122-185. Sampling and testing procedures.

(a)

Sampling procedures. When wastewater sampling is required by the county of any user for any purpose, the following sampling procedures shall be utilized:

(1)

For conventional pollutants, metals, acid organics, base/neutral organics and pesticides, a 24-hour composite sample shall be collected from a well-mixed waste stream. Samples shall be taken at increments of not less than one per hour over 24 hours or the time of discharge. Where batches of wastewater are treated and released, single grabs from each well-mixed batch discharged during a 24-hour period may be used to form the composite in relation to volumes discharged.

(2)

Cyanide, pH, grease and oil, phenols, volatile organics, sulfides and temperature shall consist of a minimum of four grab samples collected from a well-mixed waste stream. Volatile organic samples shall be collected in triplicate bottles.

(3)

The county may require special sampling and/or analysis, either through permit or special order.

All samples shall be properly refrigerated and preserved in accordance with 40 CFR 136. The frequency of sampling, sampling chamber, metering device, sampling methods and analysis of samples shall be subject, at any time, to inspection and verification by the county. Sampling and measuring facilities shall be such as to provide safe access for authorized personnel of the county for making such inspections and verification.

(b)

Testing procedures.

(1)

All wastewater monitoring samples required by the county shall be tested by an independent laboratory for the parameters required, with the results submitted to the county on the original laboratory report sheets. The requirement for utilization of an independent laboratory may be waived by the county when the required tests are performed by the county or other approved agency or when duplicate ("split") samples are provided to the county and the county's testing results of such duplicate samples show a reasonable correlation with the user's in-house testing results.

(2)

All measurements, tests and analyses of the characteristics of waters and wastes to which reference is made in this article shall be determined in accordance with the latest edition of 40 CFR 136 or in accordance with any applicable EPA testing procedure of general acceptance in the chemical testing industry; provided, however, all such analyses that shall be determined in accordance with these requirements shall prevail in the event of a conflict.

(3)

All analysis for permit reporting shall be performed by certified wastewater laboratory analysts as required by the rules of the state board of examiners for certification of water and wastewater treatment plant operators and laboratory analysts, or performed in a commercial environmental laboratory approved by the Georgia EPD.

(Ord. of 6-28-88, § 3-26-96; Amd. of 2-22-11; Amd. of 2-26-13)