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<br />001751 <br /> <br />ATTACHMENT B <br /> <br />~ <br />III /' /JfP <br />~.f' <br /> <br />Water Quality Observations and Sample Results <br />during the San Juan River Low Flow Test <br />July 9 through 15,2001 <br />(Date of Report - November 23,2001) <br /> <br />Background <br /> <br />Water quality sampling sites were selected based on previous test sample sites (Archuleta, <br />Blanco, Bloomfield, and Farmington), discussions with New Mexico Environment Department <br />(added site below Bloomfield wastewater treatment plant), and field observations (added site <br />below Citizen's Ditch diversion) during the test. Because of the Animas River flows, no <br />sampling was done below the Animas River confluence due to flows being within the historical <br />range at the gaging stations. <br /> <br />During discussions with the New Mexico Environmental Department, Reclamation committed to <br />take samples and analyze for all state standards for the given water use of the river segments. <br />These water uses and associated standards include irrigation, livestock, wildlife habitat, marginal <br />and high quality coldwater, warmwater fishery, Municipal and industrial water supply and <br />secondary contact uses do not have any associated standards. <br /> <br />Constituents analyzed include: major cations and anions, dissolved and total trace elements, <br />some radiometries, some organic compounds (DDT, PCB, Total Chlordane), fecal coliform, E. <br />coli, and physical properties. <br /> <br />Sample Methods <br /> <br />For all samples except the coliform samples, water was collected using the standard USGS <br />method of obtaining a depth-integrated sample. A water sample was collected with a D-81 <br />sampler at 30 to 50 locations on a cross section across the river. The sample was deposited in a <br />chum bucket and transported to the sample truck, Samples were filtered, preserved, bottled, and <br />labeled in the sample truck. All sample were kept in an ice cooler with ice during transportation. <br />Some samples were delivered to labs (radiometries and coliform) on Friday July 13, and others <br />were held in a refrigerator until shipment on Monday July 16, Coliform samples were collected <br />by sweeping the bottle on the surface at the sample collection points and delivered to the lab <br />within the six hour holding time. <br /> <br />Water samples for major cations and anions, total and dissolved trace metals were sent to the <br />Sangre De Cristo Laboratory, Inc in Alamosa, Colorado, Samples were analyzed using current <br />EPA methodology, The water samples for radiometries and dissolved trace metals were sent to <br /> <br />Page 1 of 15 <br />