Low Level Data Reporting Requirement

As a requirement of ch. NR 149, Wis. Adm. Code, Certified or Registered Laboratories must report these analytes down to their determined Limit Of Detection (LOD), with the appropriate qualifier if less than their Limit of Quantitation (LOQ). This becomes effective January 1, 2001.

Substances of Concern
Metals Antimony Beryllium Cadmium Lead Thallium Mercury Chromium (Hexavalent) Acids/Phenols Pentachlorophenol (PCP) Benzidines Benzidine Haloethers Bis(chloromethyl)ether Nitroaromatics 2,4-Dinitrotoluene 2,6-Dinitrotoluene Polynuclear Aromatic Hydrocarbons Benzo(a)pyrene	Phthalates & Adipates Di(2-ethylhexyl)phthalate Nonpurgeable Chlorinated Hydrocarbons Hexachlorobenzene Dioxins/Furans Dioxin (2,3,7,8-TCDD) PCBs Polychlorinated biphenyls Chlorinated Pesticides DDT and Metabolites Heptachlor Heptachlor epoxide Lindane Toxaphene Carbamate Pesticides Aldicarb Nitrogen Pesticides Alachlor Trifluralin	Organo-Phosphorus Pesticides Dimethoate Parathion Other Pesticides Dibromochloropropane (DBCP) Ethylene dibromide (EDB) Volatiles 1,1,2,2-Tetrachloroethane 1,1,2-Trichloroethane 1,3-Dichloropropene (cis/trans) Bromodichloromethane Bromoform Bromomethane Chloroform Chloromethane Methyl tert-butyl ether (MTBE) Methylene Chloride Vinyl Chloride

A laboratory must have determined their LOD and LOQ for any substance on this list which is included in the laboratory's certification or registration by January 1, 2001.

Please note that clients and other WI DNR Programs may have reporting requirements beyond that of the Laboratory Certification and Registration Program.. Ch. NR 809 (Drinking Water Program) already requires that data be reported to the LOD for all regulated primary drinking water contaminants and ch. NR 140 (Groundwater Program) and the proposed ch. NR 507 (Landfill Program) require facilities to report data to the LOD for all substances. Since this information is scattered throughout many different codes, below we have provided a laboratory's guide of when to report data to the LOD:

1. If the client requests it, then report to the LOD.
2. If it is a sample for the Groundwater or Landfill Programs, then report all analytes to the LOD.
3. If it is a sample for the Drinking Water Program, then report all analytes with an MCL to the LOD.
4. If (1), (2) & (3) do not apply to the sample, then report to the LOD if the substance is on the NR 149 Reporting Requirement List.
5. If (1), (2), (3) & (4) do not apply, then it is not necessary to report to the LOD.

Even though this is a condensed and simplified guide, we realize knowing when to report results to the LOD is still complex. However, there is a way to make it easy. A laboratory may report all data to its LOD, with the appropriate qualifiers, and never have to worry about this! Of course, laboratory clients may also specify how data are to be reported that goes beyond any Wisconsin requirements.

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