Sample preservation and analysis

Sample preservation and analysis. (1) General requirements. All sampling, preservation, extraction, and analytical methods used for compliance with chs. NR 700 to 754 shall be according to the requirements in s. NR 716.13 . (1m) Use of gasoline range organics/diesel range organics analysis. Soil or groundwater analyses for gasoline range organics or diesel range organics conducted for screening purposes shall be completed in accordance with the “Modified GRO, Method for Determining Gasoline Range Organics” and the “Modified DRO, Method for Determining Diesel Range Organics.” For purposes of this section, the term “screening purposes” means sampling conducted during site investigations, environmental assessments or other activities in compliance with chs. NR 700 to NR 754 for purposes of determining whether a discharge has occurred or to estimate the degree and extent of contamination.