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TABLE 6 CONCENTRATIONS OF INORGANIC COMPOUNDS IN <br /> SAMPLES OF GROUNDWATER, EXXON RS 7-3942, <br /> STOCKTON,CALIFORNIA,2 MAY 1991 <br /> 1 Well No./Analysis RW1 RW2 RW4 IWl <br /> General Minerals(µg/L) <br />' Bicarbonate alkalinity 460 460 630 730 <br /> Carbonate alkalinity Q <2 <2 Q <br /> Hydroxide alkalinity Q <2 Q Q <br />' Calcium 84 89 80 99 <br /> Chloride 28 36 32 30 <br /> Copper 013 008 005 <0 04 <br /> Iron 005 012 <0 05 013 <br /> Magnesium 40 46 39 42 <br /> Manganese 21 30 080 22 <br /> pH 70 70 75 71 <br />' Sodium 25 29 30 31 <br /> Sulfate 09 1.1 52 31 <br /> Conductivity 840 890 800 890 <br /> Total dissolved solids 510 540 570 510 <br /> Hardness 373 410 360 420 <br /> Zinc 0 061 0 064 0 064 0 019 <br /> Well No/Analysis RWl RW2 RW4 IWl <br />' Priority Pollutants <br /> Metals(mg/L) <br />' Silver <0 005 <0 005 <0 005 <0 005 <br /> Arsenic 0 058 0 080 0 016 0 040 <br /> Beryllium <0 001 <0 001 <0 001 <0 001 <br /> Cadmium <0 005 <0 005 <0 005 <0 005 <br /> Chromium <0.01 <0 01 <0 01 <0 01 <br /> Copper 0 13 008 005 <0 04 <br /> Mercury <0 0003 <0 0003 <0 0003 <0 0003 <br />' Nickel <0 01 <0 01 <0 01 <0 01 <br /> Lead <0 02 <0 02 <0 02 <0 02 <br /> Antimony <0 02 <0 02 <0 02 <0 02 <br />' Selenium <0 004 <0 004 <0 004 <0 004 <br /> Thallium <0 1 <0 l <0 1 <0 1 <br /> Zinc 0 061 0 048 0 064 0 019 <br /> 1 <br />' m70mucar�739424 <br />