WorldWide Drilling Resource

73 WorldWide Drilling Resource ® JUNE 2013 Centerline Manufacturing Co. 903-725-6978 903-725-3647 fax ~ Mud pumps for the 21st century ~ www.centerlinemanufacturing.com ~ Centerline mud pumps are getting the job done from Canada to Australia, China to Peru ~ ©WorldWide Drilling Resource, Inc. 2006 Centerline Manufacturing is proud to be your complete stocking source for American Manufacturing mud pump parts!! U.S. Patent #6,769,884 and others pending Monopump models rated: 180 gpm Duplex models rated: 300 gpm Triplex models rated: 450 gpm 500 or 800 psi models available aluminum or iron. ~ The Centerline 7 1/2” x 10” hydraulic drive mono mud pump ~ ~ compact ~ fits on top or under deck ~ pumps the rated flow of a 5” x 6” @ over twice the rated pressure ~ weighs 650 lbs, 1615 lbs less! Understanding the Vulnerability of Basin-fill Aquifers Adapted from information by the U.S. Geological Survey Human health and economic con- cerns associated with drinking water standards prompted a study of the vul- nerability of basin-fill aquifers in the south- western U.S. to nitrate contamination and arsenic enrichment. Regional analyses of water quality in the principal aquifer systems was previously conducted by the National Water-Quality Assessment (NAWQA) Program of the U.S. Geological Survey. The study Predicted Nitrate and Arsenic Concentrations in Basin-Fill Aquifers of the Southwestern United States is a compilation of the baseline knowledge of groundwater quality in 16 basins from the NAWQA Program. The southwestern model grid in the study represents over 190,000 square miles of basin-fill aquifers covering parts of Arizona, California, Colorado, Nevada, New Mexico, and Utah. The statistical models show natural and human-related factors affecting aquifer vulnerability to contamination. The study indicated 2.4% of the area has nitrate concentrations equal to or greater than the EPA (Environmental Protection Agency) drinking water stan- dard. However, arsenic in the basin-fill aquifers shows 42.7% higher than the EPA standard for drinking water. Areas predicted to exceed the nitrate drinking water standard are generally developed, especially for irrigated agri- culture, but are also in more urban loca- tions. In the areas affected by high nitrate concentrations in agricultural land use, fertilizer and livestock manure are sig- nificant sources, and are typically alle- viated with best management practices. Arsenic in groundwater is usually from natural sources, namely the basin- fill sediments and bedrock from which the sediments came. Although the areas predicted to have equal to or greater than the EPA standard are sparsely populated, some are within or adjacent to major population centers which could affect future groundwater development as these cities grow. Improved understanding from the study will assist in the development of tools water managers and others can use to assess and protect the quality of groundwater resources. Send your deals to: promotions@worldwidedrillingresource.com The folks at Rosick Well Drilling in Hudson Falls, New York, purchased this pump hoist from Pulstar Mfg./ Preferred Pump. WWDR photos. NEWWA 2013 Dealmakers This REICHdrill Legend 4 was pur- chased by Capital Well Clean Water Center of Dunbarton, New Hampshire, from Northeast Drill Supply. Pulstar Mfg REICHdrill