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Sample Collection and Analysis

Special Wastewater Discharge Sample Collection and Analysis

  • Sample collection and analysis for Special Wastewater Discharges may be required. Typically, at least one representative sample must be collected of the wastewater that is proposed for discharge. Typical types of Special Wastewater Discharges include Underground Storage Tank (UST) mitigation projects, floor cleaning operations, off-spec product, car wash holding tanks and purge water from monitoring wells.
  • "Representative" means that the collected sample has the same characteristics as the rest of the wastewater. It is imperative that correct sampling protocol, as defined by Standard Methods, 40 Code of Federal Regulations (CFR) 136, be followed for sample collection, sample container, holding times, sample storage, chain of custody procedures, etc.
  • Samples should be analyzed by a laboratory in accordance with 40 CFR 136 for the parameters as specified by BCWS. BCWS reserves the right to require a portion of the representative sample if requested. BCWS may also require that BCWS personnel be present when the wastewater is sampled.

At a minimum, wastewater from all Underground Storage Tanks (USTs) must be analyzed for the following parameters:

  • Benzene, Toluene, Ethyl Benzene, Xylene (BTEX)
  • Total Petroleum Hydrocarbon (TPH or Oil & Grease Hydrocarbon)
  • Petroleum Aromatic Hydrocarbon (PAH)
  • Total Lead
  • Closed Cup Flashpoint