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1.1 This guide covers an approach to selecting and implementing a well maintenance and rehabilitation program for ground-water monitoring wells. It provides information on symptoms of problems or deficiencies that indicate the need for maintenance and rehabilitation. It is limited to monitoring wells, that are designed and operated to provide access to, representative water samples from, and information about the hydraulic properties of the saturated subsurface while minimizing impact on the monitored zone. Some methods described herein may apply to other types of wells although the range of maintenance and rehabilitation treatment methods suitable for monitoring wells is more restricted than for other types of wells. Monitoring wells include their associated pumps and surface equipment.
1.2 This guide is affected by governmental regulations and by site specific geological, hydrogeological, geochemical, climatological, and biological conditions.
1.3 The values stated in SI units are to be regarded as the standard.
1.4 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.
D652 Method of Test for Measuring Mica Stampings Used in Electronic Devices and Incandescent Lamps
D653 Terminology Relating to Soil, Rock, and Contained Fluids
D1889 Test Method for Turbidity of Water
D4044 Test Method for (Field Procedure) for Instantaneous Change in Head (Slug) Tests for Determining Hydraulic Properties of Aquifers
D4412 Test Methods for Sulfate-Reducing Bacteria in Water and Water-Formed Deposits
D4448 Guide for Sampling Ground-Water Monitoring Wells
D4750 Test Method for Determining Subsurface Liquid Levels in a Borehole or Monitoring Well (Observation Well)
D5088 Practice for Decontamination of Field Equipment Used at Waste Sites
D5092 Practice for Design and Installation of Ground Water Monitoring Wells
D5254 Practice for Minimum Set of Data Elements to Identify a Ground-Water Site
D5299 Guide for Decommissioning of Groundwater Wells, Vadose Zone Monitoring Devices, Boreholes, and Other Devices for Environmental Activities
D5408 Guide for Set of Data Elements to Describe a Groundwater Site; Part One--Additional Identification Descriptors
D5409 Guide for Set of Data Elements to Describe a Ground-Water Site; Part Two--Physical Descriptors
D5410 Guide for Set of Data Elements to Describe a Ground-Water Site;Part Three--Usage Descriptors
D5472 Test Method for Determining Specific Capacity and Estimating Transmissivity at the Control Well
D5474 Guide for Selection of Data Elements for Groundwater Investigations
D5521 Guide for Development of Ground-Water Monitoring Wells in Granular Aquifers
ICS Number Code 13.060.10 (Water of natural resources)
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ASTM D5978-96e1, Standard Guide for Maintenance and Rehabilitation of Ground-Water Monitoring Wells, ASTM International, West Conshohocken, PA, 1998, www.astm.orgBack to Top