(A) Applicability. At minimum, all significant industrial users (SIU) including categorical industrial users (CIU) as well as non-significant regulated users (NSRU) are required to sample based on the village monitoring frequency as stated in the wastewater discharge permit. Other users are required to sample upon the request of the village. The users shall pay the costs of sampling of its discharge and the costs of analyses of its samples, whether or not the sampling and analyses are done by the user or by the POTW.
(B) Frequency.
(1) All significant industrial users (SIU) including categorical industrial users (CIU) with wastewater discharge permits must sample their effluent consistent with the permit requirements and report the results to the POTW at least twice yearly. The village may specify more frequent reporting, quarterly or monthly, dependent of the frequency for those parameters specified in the user's permit and the village monitoring frequency defined in the Village Enforcement Response Plan. The SIU may have the village conduct routine monitoring using an independent laboratory. Sampling visits of this type will normally be unannounced.
(2) Any non-significant regulated users (NSRU) with an individual or general wastewater discharge permit shall sample their effluent and report the results to the POTW consistent with the requirements of the wastewater discharge permit and the village monitoring frequency.
(3) The village shall have the right to perform its own sampling at any time at any location. village data will be used for all surcharge evaluations.
(4) The village may initiate sampling and analyses at a greater frequency as a result of a violation of any discharge permit limit, including cases where hot spot maintenance issues or blockage to the sanitary sewer system has occurred.
(5) The Pretreatment Coordinator will define sampling and analyses for any batch discharges as appropriate.
(6) Cost of village sampling and analyses for any monitoring will be invoiced to the applicable user.
(C) Sample collection.
(1) Samples collected to satisfy reporting requirements must be based on data obtained through appropriate sampling and analysis performed during the period covered by the report, based on data that is representative of conditions occurring during the entire sampling and reporting period as defined in the wastewater discharge permit.
(2) Except as indicated in divisions (C)(3) and (C)(5) of this section, the user must collect wastewater samples using flow proportional composite collection techniques.
(3) In the event flow proportional sampling is infeasible, the Pretreatment Coordinator may authorize the use of time proportional sampling at minimum collecting samples every 15 minutes during a 24-hour workday; or a minimum of four grab samples where the user demonstrates that this will provide a representative sample of the effluent being discharged. A proportional number of samples shall be collected for wastewater discharges less than 24 hours.
(4) Single grab samples may be required in the event of an infrequent batch discharge or to show compliance with instantaneous discharge limits.
(5) Samples for fats, oil and grease, temperature, pH, cyanide, hexavalent chromium, phenols, sulfides, and volatile organic compounds must be obtained using the number of grab samples necessary to assess and assure compliance with applicable pretreatment standards and requirements. Multiple grab samples that are individually preserved as specified in 40 CFR 136 and appropriate USEPA guidance that are collected during a 24-hour period may be composited prior to the analysis, as follows:
(a) For cyanide, hexavalent chromium, phenols, and sulfides: multiple grab samples may be composited in the laboratory or in the field;
(b) For volatile organics and oil and grease: multiple grab samples may only be composited in the laboratory.
(6) Composite samples for other parameters unaffected by the compositing procedures as documented in approved EPA methodologies may be authorized by the village, as appropriate.
(Ord. 2020-06-18, passed 6-15-2020)