Water Well Journal

August 2015

Water Well Journal

Issue link: http://read.dmtmag.com/i/543740

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Page 9 of 71

In this ISSUE T he August 2015 issue of Water Well Journal focuses on well rehabilitation and contains a pair of feature stories on the subject. The first is titled "Disinfecting New and Existing Wells" by Michael J. Schnieders, PG, PH-GW, on page 21. In it, Schnieders points out while water well disinfection is one of the most common forms of maintenance performed, it is also one of the most misun- derstood procedures in the industry. He adds disinfection should be a means of reducing the bacterial community and limiting the potential for pathogenic organisms to exist within a well—and not as a way to clean the well. He then goes over the proper way to disinfect a well, limitations that will be faced, solutions to use, the most effective way for the solutions to work, and last, disposing of the solution upon completion of the job. Author Kathleen Wiseman points out several items to consider when working with well systems that are used infrequently in the feature story "Inactive and Seasonally Idled Wells" beginning on page 25. Wiseman describes types of idled wells and points out not only can an idle well lead to physical impairment, it can also lead to water quality issues. She points out wells limited to intermittent ac- tivity due to regulatory or other constraints should have a proactive monitoring and maintenance program to minimize problems commonly seen at start-up—such as mineral and biological fouling, corrosion, and damage to well components and pump. She adds frequent maintenance and care are equally important with regard to well efficiency, production, and annual budgetary concerns and goes over tips for treating idle wells. Freelance writer Jennifer Strawn wraps up her two-part series on corrosion by detailing crevice and galvanic forms after discussing pitting and uniform corrosion in the July WWJ. In "Part 2: How to Prevent Crevice and Galvanic Corrosion Before It Starts" on page 28, Strawn defines the two types of corrosion, details what manufacturers are doing to prevent equipment from rusting, and provides maintenance tips contractors can do to extend the life of their equipment. She points out crevice corrosion can be a problem as it often goes unseen. This is why among the tips from manufacturers, owners, and companies Strawn provides is to wash or power-spray equipment regularly. Road salts or brine that get in the underbody of rigs or equipment is a leading cause of crevice corrosion. The monthly Engineering Your Business column continues its three-part series on what you should know about pumping systems. This installment, titled "What You Should Really Know About Drivers" by Ed Butts, PE, CPI, begins on page 36 and covers seven important things contractors working with motors need to know so they're able to troubleshoot issues at a jobsite or prevent issues from arising for their customers. Each topic is broken into its own section. Covered are heat causing motors to fail, new motors, using 230-volt motors on 208-volt power supplies, voltage imbal- ance, motor ratings, air-cooled vs. water-cooled engines, and using an adequate mass of resistance. The latest Field Notes article continues with a look at tools to help you retain geologic samples at a jobsite. Authored by Raymond L. Straub Jr., PG, the article titled "Retaining Geologic Samples" and beginning on page 32 explains some states or agencies require sample retention practices for a variety of reasons includ- ing drilling for public water supply wells, complicated wells, or wells in areas of limited geologic data. Straub then goes over some of the different types of drill cutting sample contain- ers. He details sizes, features, and common drawbacks for a resealable plastic sam- ple bag, a cloth sample bag, a disposable sampling bag, a sample booklet, a sample envelope, and a rock chip storage case. Disclaimer Water Well Journal and the National Ground Water Association provide information for guid- ance and information purposes only. This publi- cation is not intended to provide investment, tax, or legal advice. The information contained herein has been compiled from sources deemed reliable and it is accurate to the best of our knowledge and belief; however, Water Well Journal and the National Ground Water Association cannot guarantee as to its accuracy, completeness, and validity and cannot be held liable for any errors or omissions. All information contained herein should be independently verified and confirmed. Water Well Journal and the National Ground Water Association do not accept any liability for any loss or damage howsoever caused in reliance upon such information. Reader agrees to assume all risk resulting from the application of any of the information provided by Water Well Journal and the National Ground Water Association. Trademarks and copyrights mentioned within Water Well Journal are the ownership of their respective companies. The names of products and services presented are used only in an edu- cational fashion and to the benefit of the trade- mark and copyright owner, with no intention of infringing on trademarks or copyrights. No endorsement of any third-party products or services is expressed or implied by any infor- mation, material, or content referred to in the Water Well Journal. Subscriptions/Back Issues For questions, changes or problems with your subscription call Katie Neer. Subscriptions: Water well contractors and other qualified groundwater industry personnel in U.S. and Canada — free; others in U.S. — $115 per year; $15 per copy. Canada – $135 per year; $24 per copy. International: $150 per year; $35 per copy. Subscriptions available through NGWA offices only. We reserve the right to re- fuse subscriptions to anyone not directly en- gaged in the groundwater industry. Claims for missing issues must be made in writing within three months of publication and will be subject to the availability of back issues. Advertising Disclaimer Advertisers and advertising agencies assume liability for all content (including text, repre- sentation, and illustrations) of advertisements printed and also assume responsibility for any claims arising therefrom made against the pub- lisher. The publisher reserves the right to reject any advertising that it believes is not in keeping with the publication's standards or is deemed unsuitable or misleading. Michael J. Schnieders, PG, PH-GW Kathleen Wiseman 8 August 2015 WWJ waterwelljournal.com

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