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Table 4 <br /> Historical Groundwater Quality Record <br /> Teichert Aggregates and Granite Construction—Vernalis Area,San Joaquin County <br /> (all units in mq/L unless otherwise specified) <br /> Total Total Coliform <br /> Sampling EC TDS pH Hardness Ca Mg Na K Alkalinity OH CO3 HCO3 SO4 Cl NO3 NO2 P F B Cu Fe Mn Zn "rutal Fecal <br /> point Data (We.) as CsCO3 as CeCO3 as OH as CO3 as HCO3 as NO3 as NO2 (IwJL) (peL) lus/I.d lire/LI (MPN/100 mL) <br /> Maximum Contaminant 65 to <br /> Level' 900• 500• 8.5• 250• 250' 45 3 2 - 1,000- 300• 50• 5,000" - - <br /> Granite k3 11/18/2013 869 550 78 243 58 24 71 3 180 <10 <10 220 198 47 6.5 <0.3 -- OA 1.0 80 13,600 220 50 NS NS <br /> Granite N3 5/14/2014 914 650 7.7 307 80 26 83 2 ISO <10 <IO 220 205 52 133 10.3 — <O.1 L1 <IO 280 <10 <20 NS NS <br /> Granite M3 11/12/2014 1,000 620 74 320 82 28 83 2 170 <10 <10 210 219 53 15.3 <0.3 -- <0.1 10 200 1,190 30 20 NS NS <br /> Granite#4 8/4/2009 965 620 7.9 297 78 25 90 2 200 <10 <10 240 211 48 12.1 <0.3 -- 0.2 LI 20 410 10 <20 --- — <br /> Koster 6/1/1994 800 490 77 240 61 23 94 ND 150 ND ND 180 96 70 31 ND ND 0.2 LI ND 470 50 ND — -- <br /> Koster 10/4/1994 890 500 7.7 230 62 19 87 ND 151 ND ND 184 110 70 35 ND ND 0.2 1 ND ND ND ND -- — <br /> Koster 7/6/1995 820 510 76 230 61 19 78 ND 160 ND ND 195 110 95 33 ND ND ND 1 ND 180 ND ND — -- <br /> Koster 10/16/19% 840 500 74 240 62 20 87 2 160 -- -- 200 100 98 32 --- -- 0.2 ND ND 100 ND ND --- <br /> Roger 4/9/1997 820 500 6.8 240 64 18 85 2 170 ND ND 200 96 100 6.5 ND ND 05 1 ND 220 ND ND --- -- <br /> Koster 7/3/1997 810 550 74 230 62 19 82 3 150 ND ND 180 98 95 28 ND ND 0.3 1 ND ND ND ND --- -- <br /> Ruston 3/1/1994 840 460 7.7 178 48 14 87 ND 174 ND ND 212 45 80 11.2 ND ND 02 0.7 ND ND ND ND — — <br /> Notes: <br /> As of 2004,non-detected values are given ss"<reporting limit".NS=Not Sampled <br /> 1. Maximum contaminant levels for drinking water supply. Concentrations marked"•"are secondary,i e.,consumer acceptance limits for drinking water. For EC,TDS,cldoride,and sulfate,the recommended(lower)values me given. <br /> 2. Retesting in November 1994 confirmed presence oftmal coliform bacteria and absence of fecal coliform. <br /> 3. Sample results for alkalinity series(total alkalinity,OF,CO3,and HCO3)were verified by duplicate sample results from independent laboratory. <br /> / 311 a/IDIS page 9 oN <br />