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<br />001753 <br /> <br />Sample Results <br /> <br />The coliform sample results are noted in Table B below. The results are comparable with <br />previous data collected during low flow tests in that fecal coliform exceeds the standard of 400 <br />colonies/lOOml (single sample) in river segment 20.6.4.401' at Farmington USGS gage and <br />Bloomfield Highway 44 bridge, This segment of the San Juan River is listed in the State's draft <br />2000-2002 9303(d) list of water quality limited waters requiring Total Maximum Daily Loads <br />(TMDLs). The 303(d) lists probable causes of the pollutant as agriculture and urban runoff. The <br />TMDL for fecal coliform is due December 31, 2004. <br /> <br />Table B Fecal Coliform Results <br /> <br />Sample Location Latitude Longitude River Total Fecal e,coli <br /> Mile Coliform Coliform (colonies per <br /> (colonies per (colonies per 100 ml) <br /> 100 ml) 100 ml) <br />San Juan River at 36043'22.8" 108013'32,6" 180,7 >2,400 460 214 <br />Farmington USGS gage <br />NM State river segment <br />20,6.4.401 <br />San Juan River at Lee 36041 '23.6" 108005'44.4" 188.5 >2,400 93 365 <br />Acres bridge - County <br />Road 5500 <br />NM State river segment <br />20.6.4.401 <br />San Juan River upstream 36041 '59.0" IOr59'04,7" 195.4 >2,400 1,100 291 <br />of Highway 44 bridge at <br />Bloomfield <br />NM State river segment <br />20.6.4.401 <br />San Juan River at 36043'27.0" IOr48'48.7" 207.0 >2,400 240 38 <br />Highway 64 bridge at <br />Blanco <br />border between NM State <br />river segments 20.6.4.401 <br />and 20.6.4.405 <br />San Juan River at USGS 36048'07,6" 107041'54.5" 218.5 153 4 I <br />gage in Archuleta <br />NM State river segment <br />20.6.4.405 <br /> <br />Note: Grab samples from bank where flow was visible. Precipitation events occurred on the afternoons of July 9. 10. and <br />possibly 11 with fine sediment deposition in the river downstream of Highway 64 bridge at Blanco, NM. <br /> <br />(River segment numbers are assigned by State of New Mexico identifying sections of the <br />San Juan River. <br /> <br />Page 3 of 15 <br />