MONITORING--Commercial availability of modular casing components and packer-transducer assemblies for of quality/head monitor wells UNITED STATES DEPARTMENT OF THE INTERIOR GEOLOGICAL SURVEY RESTON VIRGINIA 22092 Code 4351 5016 June 20, 1979 GROUND WATER BRANCH TECHNICAL MEMORANDUM NO. 79.06 SUBJECT: MONITORING--Commercial availability of modular casing components and packer-transducer assemblies for construction of quality/head monitor wells Ground-water projects commonly require fairly detailed information about the distribution of head, hydraulic conductivity, and ground-water quality with depth. Commercial equipment deigned specifically to assist in the collection of these types of information is described in the enclosed brochures. These are 1) modular casing components useful in the design of multi-zone monitoring wells and 2) a packer-transducer assembly that can be run into the casing to obtain information on head, to conduct hydraulic tests, and to obtain water-quality samples from various zones in a well. The modular casing components include a valve that can be opened for measuring pressure and collection of a sample, and then closed. Several of these units can be installed at selected depths in a single string of casing. We first saw this equipment on display at the last Geological Society of America annual meeting. We are not aware of other commercial equipment designed to function exactly as described in the brochures. The equipment has not been used extensively on a WRD project, and we can not provide information on actual field performance. Consequently, this material is distributed only for the purpose of new testing equipment that might be suitable for use without extensive modification. Additional information on performance, support requirements, and costs should be obtained from the manufacturer before deciding whether this sort of equipment is suitable for the needs of an individual project. If you utilize the equipment, please provide us a brief summary of your experience with it. (s) Gerald Meyer Chief, Ground Water Branch Enclosures WRD Distribution: A - (Memo only) B - 22 copies each Regional office (Memo and enclosures) FOL - (Memo and enclosures)