SOIL PREPARATION FOR LIBRARY STORAGE DOE/ERSP PROCEDURENO. 20 DATE DRAFTED: 13 July 1978 APPROVED: 1 August 1978 by Roger Ray (ERSP Manager) L Purpose To provide a uniform sterilization and packaging procedure for Enewetak Cleanup Project soil samples to be archived by DOE. T. Applicability This procedure applies to soil samples selected for Library Storage and processed by the Eberline Instrument Laboratory (DOE Element) on Enewetak Atoll. tl. Responsibility The Eberline Enewetak Laboratory Manager is responsible for the preparation of soil samples in accordance with this procedure. IV. General During the Enewetak Cleanup Project approximately 8,000 to 12,000 soil samples will be analyzed by the Eberline Laboratory Facility, and representative portions of those samples selected by DOE for long term retention will be processed so that the samples may be returned to the DOE samplelibrary at the Nevada Test Site, Mercury, Nevada. All samples returned will be packaged in 16 oz. (500 ml) Nalgene LPE wide mouth bottles Cat. #2104-0016 with Cat. #53 serew caps. Bottles will be packaged in a single transportainer (CONEX container) for shipment to NTS. Sample location grid sheets will be provided with the shipment. The grid sheets will be located inside the transportainer in an envelope labeled “sample locator." The location of each sample in the transportainer will be indicated on the appropriate grid sheet. The grid sheets will also include the following information: island (name or symbol), sample coordinates and the EIC laboratory number or other DNA number if the samples were not processed by EIC. A eopy of the grid sheet will be retained by EIC with a copy also sent to the ERSP Manager. A Department of Agriculture permit or other authorization will be obtained and maintained by Eberline Instrument Corporation to cover samples shipped into the United States. Vv. Procedure A. Remove sample from storage location and take to the sample preparation facility or process as part of the normal sample routine after laboratory analysis is completed. 1. Any samples that have not been processed by EIC will be ballmilled according to the standard ballmilling procedure. 2. Spread 550-600 ml of soil in 4x6-in, aluminum pan. Use a new aluminum pan for each sample. 3. Mark pan with EIC sample number to avoid mixing up samples. Fill in EIC sample numberand other info on the grid sheet. 4. Dry in soil oven for 4 hours. Start time after loaded oven stabilizes at 300°F as determined by the oven thermometer embedded in one of the soil samples, A-20-1