Data quality objective to support resolution of the organic complexant safety issue

Tank characterization report for single-shell tank 241-AY-101

“…The wet weight basis energetics results were much less than the decision threshold, and the sample had a weight percent water content in excess of 80 percent (Esch 1996). A propagating exothermic reaction cannot occur unless the weight percent water results are below 17 percent (Turner et al 1995). All individual percent water results…”

“…All the individual supernatant sample results were above the 30,000-pg ClmL safety screening decision threshold, with an overall mean of 40,600 pg C/g (43,900 pg ClmL) and an upper limit to a one-sided 95 percent confidence interval on the mean of 66,500 pg C/g (72,200 pg ClmL). From a safety viewpoint, however, this should not be a concern because a propagating exothermic reaction can only occur when the water content is below 17 wt% (Turner et al 1995).…”

Tank characterization report for single-shell tank 241-U-103

“…Core samples were taken between September 1996 and April 1997 to satisfy the requirements of Tank ,Sa~ety Screening Data Quality Objective , Data Quality Objective to Suppoti Resolution of the Organic Complexant Safety Issue (Turner et al 1995), and Application of "Flammable Gas Tank Safety Program: Data Requirementsfor Core Sampling Analysis Developed Through the Data Quality Objectives Process, " Rev. 2 .…”

Tank 241-U-105 push mode core sampling and analysis plan

“…The organic DQO document (Turner 1995) requires determination of total organic carbon (TOC) by furnace oxidation if the energy equivalent by TOC (See Section 5.2.) is less than 75% of any differential scanning calorimetry (DSC) exotherm.…”