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<br />7A - ATTACHMENT NO.3 <br />Saltworks Proposal- Water Group Summary Report (22 January 2010) Page 36 <br /> <br />Table 6 <br /> <br />Summary of Local Groundwater Quality <br /> <br /> GeoConsultants Bohley/Maley Drinking <br /> Well Bayport No. 1 Well 1 Well 2 Well 3 Water <br /> Lab Sequoia Sequoia Sequoia Sequoia Sequoia Standards <br />Parameter IDL Apr-91 May-91 Sep-93 Oct-93 Nov-93 <br />Major Cations <br />calcium 0.5 21 - 31 23 - ** <br />magnesium 0.5 25 - 21 17 - ** <br />sodium 0.5 140 - 160 180 - ** <br />potassium 1.0 19 - 7.1 2.7 - ** <br />Major Anions <br />bicarbonate alkalinity 1.0 260 - 29~_ - ** <br />sulfate 0.1 23 - - 250 s <br />chloride 0.2 110 - 12 140 250 s <br />Minor ions <br />iron 0.01 0.17 0.27 0.029 0.3 s <br />manganese 0.01 0.05 s <br />fluoride 0.1 0.2 - - - - 2.0 P <br />nitrate as NO 3 1.0 nd - - - nd 45 P <br />boron 0.01 0.29 - - - 0.29 ** <br />carbonate alkalinity 2.0 nd - nd nd - ** <br />hydroxide alkalinity 0.1 nd - nd nd - ** <br />Physical Properties =~ <br />Electrical Conductivity ?mhos/cm '~JIlI 860 890 900 s <br />total dissolved solids 1.0 500 s <br />hardness 1.0 160 160 - ** <br />pH units na 8.3 - 7.5 7.8 - 6.5-8.5 s <br />color units 5.0 nd 15 s <br />odor TON 1.0 nd - nd nd - 3 s <br />turbidity NTU 0.1 3.5 5 s <br />surfactants 0.025 nd - nd nd - 0.5 s <br />Trace Ions <br />aluminum 0.1 0.17 0.53 0.14 - 1.0 P <br />arsenic 0.005 - - - - 0.01 P <br />barium 0.1 0.3 - 0.23 0.18 - 1.0 P <br />cadmium 0.01 nd - nd nd - 0.005 P <br />chromium 0.01 0.034 - nd nd - 0.05 P <br />copper 0.01 0.05 - nd nd - 1.0 s <br />lead 0.005 0.0079 - - - - 0.015 P <br />mercury 0.0002 nd - - - - 0.002 P <br />selenium 0.005 nd - - - - 0.05 P <br />silver 0.01 nd - nd nd - 0.1 s <br />zinc 0.01 0.023 - 0.2 0.096 - 5.0 s <br /> <br />Notes: <br />All concentrations in mg/L or parts per million (ppm) except where noted. <br />nd Analyzed and not detected. <br />** No current primary or secondary drinking water standard. <br />- Analyte not tested. <br />p Primary drinking water standard <br />s Secondary drinking water standard. <br />Shaded area at or exceeds DWS. <br /> <br />Additional physical parameters that exceed standards are shown for color and turbidity, <br />with a particularly elevated turbidity (probably due to incomplete well development) in <br />Bayport No. 1 in April 1991. Elevated turbidity indicates the presence of suspended <br />sediment or colloids in the pumped groundwater indicating inadequate design, <br />installation, or operational issues at the well. Elevated turbidity can yield elevated metal <br />constituents measured from the colloidal fraction of the water; this may explain the <br /> <br />29 <br />