1. 1 Overview of Co-located Soil Chemical Sampling Approach Stephie Jennings, DOE October 12, 2010

2. 2 Agreement in Principle Agreement in Principle states: –“Where EPA is already taking samples for radiologic contaminants as part of its Area IV and Northern Buffer Zone survey work, DTSC will arrange for analysis of split samples (paid for by DOE)”

3. 3 Objectives of Chemical Co-located Sampling To provide an even greater level of knowledge about chemical contamination in Area IV and the NBZ To take advantage of EPA’s efforts for soil collection in terms of timing To begin to determine if chemical and radionuclide soil contamination are co-located or are they separate problems?

4. 4 Why? Due to volume needed for sampling the decision was made to co-locate samples instead of splits Entire effort is prescriptive –EPA makes location decisions –DTSC approves sampling plan and approach Answers questions about co-location of radionuclide and chemical contamination Uses DOE’s existing contract with CDM to quickly be in the field with EPA

5. 5 Proposed Process DTSC –Approves Sampling and Analysis Plan –Provides approval to proceed EPA –Identifies soil sample locations with public –Collects soil sample for chemical analysis –Gives sample to CDM DOE/CDM –Accepts soil sample from EPA –Procures laboratories for soil sample chemical analysis in collaboration with DTSC and with input from key stakeholders