USGS Site Number State Well Number Dates Times Type of Blank Calcium (mg/L) Magnesium (mg/L) Sodium (mg/L) Potassium (mg/L) Chloride (mg/L) Sulfate (mg/L) Bromide (mg/L) Boron (microgram/L) Iron (microgram/L) Fluoride (mg/L) Silica as SiO2 (mg/L) Total Dissolved Solids (mg/L) 381923121255001 6N/5E-33Q2M 5/23/96 1056 Field Blank <.020 <.010 <.20 <.10 <.10 <.10 <.010 <10 <3.0 <.10 0.01 15 390954121394302 15N/3E-8F2M 6/13/96 1046 Field Blank <.020 <.010 <.20 <.10 <.10 <.10 <.010 6.6 <3.0 <.10 0.04 <1 385550121352201 13N/3E-36L4M 8/8/96 1116 Field Blank <.020 <.010 <.20 <.10 <.10 <.10 <.010 6.1 <3.0 <.10 <.010 6 88888818 7/28/97 1506 Equipment Blank 0.04 <.010 <.20 <.10 <.10 <.10 <.010 <4.0 4.1 <.10 0.047 1 390856122044301 15N/2W-16R1M 8/13/97 936 Field Blank 0.024 <.010 <.20 <.10 <.10 <.10 7.2 3.6 <.10 0.045 <1 392931122031701 19N/2W-23E1M 8/20/97 1706 Field Blank <.020 <.010 <.20 <.10 <.10 <.10 <.010 11 <3.0 <.10 <.010 <1 393235122055301 20N/2W-32J1M 9/18/97 1106 Field Blank 0.062 0.016 <.20 <.10 <.10 <.10 <.010 7.8 <3.0 <.10 0.02 <1 385720121282401 13N/4E-24Q1M 10/2/97 1126 Field Blank 0.025 <.010 <.20 <.10 <.10 <.10 <.010 <4.0 <3.0 <.10 0.015 2 88888818 6/5/98 1136 Equipment Blank 0.025 <.004 <.10 <.10 <.10 <.10 <.010 <16 <10 <.10 <.10 <10 382911121312301 7N/4E-3K2M 6/22/98 1136 Field Blank 0.04 0.005 <.10 <.10 <.10 <.10 <.010 <16 <10 <.10 <.10 <10 382800121270701 7N/5E-17B1M 7/22/98 1046 Field Blank <.020 <.004 <.10 <.10 <.10 <.10 <.010 <16 <10 <.10 <.10 13 383727121301801 9N/4E-23A1M 8/6/98 936 Field Blank <.020 <.004 <.10 <.10 <.10 <.10 <.010 <16 <10 <.10 <.10 <10 384318121230001 10N/5E-13F1M 8/19/98 1016 Field Blank <.020 <.004 <.10 <.10 <.10 <.10 <.010 <16 <10 <.10 <.10 <10