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<br /> PAGE 2 <br /> TABLE 10 (CONTINUED) <br /> SUMMARY OF WATER QUALITY DATA <br /> WATER YEAR 1991 <br /> WELL TR-4, MIDDL E SANDSTONE <br />PARAMETER MEAN STD. DEV. MAX. MIN. UNITS. N0. PERIOD <br />PRIMARY <br />ARSENIC DISSOLVED <1. 000 0.000 <1.000 <1. 000 UG/L 1 6/91 <br />CADMIUM DISSOLVED <6 .000 0.000 <B.D00 <B. 000 UG/L 1 6/91 <br />LEAD DISSOLVED <20. OD0 0.000 <20.000 <20. 000 UG/L 1 6/91 <br />MERCURY DISSOLVED <0. 100 0.000 <0.100 <0. 100 UG/L 1 6/91 <br />SELENIUM DISSOLVED <1. OD0 0.000 <1.000 <1, 000 UG/L 1 6/91 <br />SECONDARY <br />ZINC DISSOLVED <10. 000 0.000 <10.000 <10. 000 UG/L 1 6/91 <br />IRON DISSOLVED <20. 000 0.000 <20.000 <20. 000 UG/L 1 6/91 <br />MANGANESE D7550LVED <10. 000 O.OOD <10.000 <1D. 000 UG/L 1 6/91 <br />TRACE METALS <br />BORON DISSOLVED 40. 000 0.000 40.000 40. 000 UG/L 1 6/91 <br />MOLYBDENUM DISSOLVED <50. 000 0.000 <SD.000 <50. 000 UG/L 1 6/91 <br />NUTRIENTS <br />NITROGEN NITRATE 0. 030 0.000 0.030 0. 030 MG/L t 6/91 <br />NITROGEN N03+N02 D. D20 0.000 0.020 O. D20 MG/L 1 6/91 <br />U = M]CRO <br /> <br />