Establishment of U.S. Geological Survey (USGS) laboratory for determination of chlorofluorocarbons(CFCs) in air and water samples In Reply Refer To: December 29, 1994 Mail Stop 412 or Mail Stop 411 OFFICE OF WATER QUALITY TECHNICAL MEMORANDUM NO. 95.02 OFFICE OF GROUND WATER TECHNICAL MEMORANDUM NO. 95.02 Subject: Establishment of U.S. Geological Survey (USGS) laboratory for determination of chlorofluorocarbons (CFCs) in air and water samples The purpose of this memorandum is to announce the availability of analytical services for determination of the chlorofluorocarbons CFC-11, CFC-12, and CFC-113 in air and water samples, and to set policy and procedures for obtaining these services. The chlorofluorocarbon laboratory, coordinated by Julian E. Wayland, is being established in Headquarters within the National Research Program and supervised by Eurybiades Busenberg and Niel Plummer. A form to request CFC analyses is provided as Attachment 1. In addition, Attachment 2 describes hydrologic applications of CFCs, field sampling and site selection considerations, and logistical aspects of the CFC laboratory. In submitting samples to the CFC laboratory, particular attention should be given to the sections of Attachment 2 on "Samples that should not be submitted to the Reston CFC laboratory," and on "Responsibilities of the project requesting the service." The establishment of the Reston CFC Laboratory provides greatly enhanced capability to USGS projects for detecting and age-dating young ground water. We encourage use of this technique where such information is likely to be of value. William M. Alley David A. Rickert Chief, Office Chief, Office of Ground Water of Water Quality 2 Attachments Keywords: Tracers Distribution: A, B, S, FO, PO