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• • PAGE 3 • <br />TABLE 21 (CONTINUED) ' <br />SUMMARV OF WATER OUA LITV DATA <br />SUMMARV OF WATER QUALITY DATA, 7 NORTH ANGLE DISCHARGE <br />PARAMETER MEAN STD. DEV. MA%, MIN. UNITS. NO. PERIOD <br />SECONDARY <br />COPPER DISSOLVED <10 .000 0 .000 c10 .000 <10 .000 UG/L 1 B/69 <br />COPPER TOTAL RECD 20 .000 0. 000 20 .000 20 .000 UG/L 1 6/90 <br />ZINC DISSOLVED <10 .000 0 .000 <f0 .000 <10 .000 UG/L I 6/89 <br />ZINC TOTAL RECD <36 .800 142. 555 7230 .000 c10 .000 UG/L 75 1/69-12/92 <br />ZINC TOTAL-TOT 10 .000 0. 000 10 .000 10. 000 UG/l 1 0/00 <br />IRON DISSOLVED <45. 000 35. 355 70 .000 <20. 000 UG/l 2 6/89- 8/90 <br />IRON TOTAL RECD <196 .136 214. 142 1200 .000 <20 .000 UG/L 44 1/89-12/92 <br />MANGANESE DISSOLVED <f0 .000 0. 000 <10 .000 <10. 000 UG/L 2 B/69- 6/90 <br />MANGANESE TOTAL RECD 20. 000 0. 000 20 .000 T0. 000 UG/L 1 6/90 <br />TRACE METALS <br />ALUMINUM DISSOLVED <50. 000 0. 000 <50 .000 c50. 000 UG/L 1 B/B9 <br />BORON DISSOLVED 160. 000 155. 563 270 .000 50. 000 UG/L 2 8/89- 6/90 <br />MOLYBDENUM DISSOLVED <50. 000 0. 000 <50 .000 c50. 000 UG/L 1 8/89 <br />NSCKEI DISS0lVE0 <20. 000 0. 000 <20 .000 <20. 000 UG/L ~ 1 B/B9 <br />NICKEL TOTAL RECD <20. 000 0. 000 <20 .000 <20. 000 UG/L 1 6/90 <br />NUTRIENTS <br />NITROGEN AMMIUM-TOT 0. 010 0. 000 0. 010 0. 010 MG/L 1 B/B9 <br />NITROGEN AMMIA-FREE 0. 002 0. 000 0. 002 0. 002 MG/L 1 B/69 <br />NITROGEN NITRATE c0. 020 0. 000 <0. 020 c0. 020 MG/L 2 6/89- 6/90 <br />NITROGEN N03+N02 c0. 075 0. 007 <0. 020 <0. 010 MG/L 2 B/B9- 6/90 <br />PHOSPHATE TOTAL-TOTA c0. 005 0. 000 c0. 005 <0. 005 MG/L 1 B/89 <br />U = MICRO <br />