Laserfiche WebLink
<br />" <br /> <br />OC16'n.l <br /> <br />PROPOSAL FOR INCREASING PRODUCTION <br />FROM CLOSED BASIN DIVISION <br />SALVAGE WELLS <br />Revised March 12, 1998 <br /> <br />DRAFT ' <br /> <br />As a result of the severe reduction in water production from project salvage wells caused by <br />bacterial biofouling, the Bureau of Reclamation is preparing a comprehensive program for <br />remediation ofthe wells, This program is also intended to enhance the understanding ofthese <br />processes of biofouling and to develop preventive maintenance procedures that will avoid or <br />diminish the recurrence of biofouling, In order to assure that the goal of significantly increasing <br />water production is achieved, the program will incorporate 3 parallel approaches ofremediation, <br />replacement, and additional data collection, These three approaches will occur concurrently to <br />the extent practicable and are: <br /> <br />1. Remediation, The first of these - remediation of promising wells - will be initiated with the <br />field testing of a variety of treatments, <br /> <br />(a) Chemical removal ofbiofouling is a method widely used throughout the water well industry, <br />and it is one that has been used with some success on the Closed Basin wells, It is expected that <br />this phase will be accompanied by mechanical cleaning, surging and redevelopment. The <br />challenge is to establish, through experimentation, the proper combination of chemicals, <br />concentrations, and contact times required to destroy the biomass that is plugging the wells, <br />Under this part of the plan, ten wells will be treated with the anticipated outcome of developing a <br />procedure that can be specified for a contract to remediate a large number of project wells, <br /> <br />(b) A second facet of the remediation study will be experimentation with heat treatment <br />technology which has been successfully used in limited areas and offers a potential method of <br />well improvement without the use of chemicals and associated environmental concerns, This <br />procedure is relatively new to the industry, and the intention is to treat two wells in this manner. <br /> <br />(c) Other methods of well remediation will be tested as they are determined feasible, <br /> <br />2, Replacement, Indications are that some of the project salvage wells are too badly <br />deteriorated to be successfully rehabilitated, In these instances it would be necessary to replace <br />the wells, Redesign of the wells and modification of operational criteria would also be <br />considered in this part of the plan in an attempt to minimize the negative impacts ofbiofouling, <br />Two wells will be constructed using the original design and current operating procedures, one in <br />