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Table 4 Historical Groundwater Quality Record Teichert Aggregates and Granite Construction-Vernalis Area, San Joaquin County (all units in mg/L,unless otherwise specified) Total Toml Coliform Sampling EC TDS pH Hardness Ca Mg Na K Alkalinity OH CO3 HCO3 SO4 CI NO3 NO2 P F B Cu Fe Mn Zn "Total Feeal Pabst D (US/e.) asCaCO3 as CaC07 uOH as C07 as HCO3 as NO3 as NO2 lUe/LI (ne/L) U%j WLLI IMPN/l00mL1 Maximum Contaminant 6.5to Level 900' 500• 85• - - 250' 250' 45 3 2 - 1000' 300• 50e 5,000• - - Faulkner 7/10/19% 990 610 7.5 310 82 26 80 ND 230 ND ND 280 82 140 27 ND ND 0.3 0.4 ND ND ND ND Absent --- Faulkner 10/16/19% 1,000 620 73 330 89 26 93 2 240 ND ND 290 75 140 30 ND ND ND ND ND ND ND ND Absent -- Faulkner 121/1997 1,000 610 76 315 85 25 82 2 220 ND ND 270 75 140 29 ND ND 0.1 04 ND ND ND ND Absent --- Faulkner 4/9/1997 980 590 5.8 330 89 26 88 2 230 ND ND 280 76 140 29 ND ND 06 4 ND ND ND ND Absent --- Faulkner 7/3/1997 950 620 7.4 320 88 25 84 2 220 ND ND 270 77 120 24 ND ND 0.2 0.4 ND ND ND ND Absent --- Faulkner 10/16/1997 980 610 7.5 300 82 23 85 3 210 ND ND 260 79 130 24 ND ND 0.3 0.4 ND ND ND ND Absent -- Faulkner 1/27/1998 960 760 7.5 300 82 23 77 2 230 ND ND 280 76 120 22 ND ND 0.2 0.4 ND ND ND ND Absent -- Faulkner 5/5/1998 910 550 7.7 290 79 23 80 2 240 ND ND 290 87 93 18 ND ND 01 04 ND ND ND ND Absent -- Faulkner 8/4/1998 920 550 7.5 290 80 23 84 2 240 ND ND 290 93 93 16 ND ND 0.1 0.5 ND ND ND ND Absent -- Faulkner 11/4/1998 920 520 7.4 300 81 23 80 2 240 ND ND 290 76 100 13 ND -- 0.1 0.3 ND ND ND ND Absent - Faulkner 2/2/1999 940 580 7.4 300 84 23 80 2 240 ND ND 300 74 96 15 ND --- 0.2 0.4 ND ND ND ND Absent -- Faulkner 5/11/1999 950 580 7 310 85 23 85 2 260 ND ND 320 86 100 20 ND -- 0.2 0.4 ND ND ND ND Absent --- Faulkner 8/18/1999 974 580 7.4 307 85 23 83 1 260 ND ND 320 78 99 20.1 ND -- 0.1 04 ND ND ND ND Absent --- Faulkner 11/17/1999 966 580 7.6 319 90 23 78 2 260 ND ND 310 81 101 19.5 ND - 02 0.5 ND 60 ND ND Absent -- Faulkner 2/24/2000 1,000 630 6.9 313 86 24 88 2 240 ND ND 300 83 115 24.5 ND - 0.2 0.5 ND 120 ND 80 Absent --- Faulkner 5/16/2000 987 600 6.8 302 83 23 86 2 250 ND ND 300 81 106 20.8 ND --- 02 0.4 ND 80 ND 60 Absent --- Faulkner 9/7/2000 963 570 73 280 76 22 86 2 240 ND ND 290 80 106 19.6 ND - 0.2 04 ND 70 ND 50 Absent -- Faulkner 11/28/2000 977 480 6.8 283 77 22 82 2 240 ND ND 300 77 97 18.4 ND - ND 0.46 ND ND ND 60 Absent --- Faulkner 2/21/2001 961 570 6.9 288 79 22 84 2 250 ND ND 310 82 102 189 ND --- ND 046 ND ND ND 70 Absent -- Faulkner 5/23/2001 956 570 7 299 82 23 84 2 260 ND ND 310 81 94 17.6 ND -- ND 0.44 ND 100 ND 120 Absent --- Faulkner 8282001 945 590 7.7 276 76 21 81 2 260 ND ND 320 81 95 15.9 ND --- 0.2 0.42 ND 70 ND 80 Absent -- Faulkner 12/112001 934 580 73 290 80 22 78 2 250 ND ND 310 73 92 13.6 ND --- ND 0.42 ND 150 ND 220 Absent -- Faulkner 3/122002 948 580 72 303 82 24 79 2 250 ND ND 310 88 100 13.3 ND --- ND 0.43 ND 60 ND 110 Absent -- Faulkner 6/192002 966 610 7.4 292 79 23 80 2 270 ND ND 320 72 99 14.5 ND --- 0.1 0.42 ND ND ND 140 Absent -- Faulkner 8/72002 975 600 7.3 297 81 23 81 2 260 ND ND 320 70 102 14.9 ND - 0.1 0.4 ND ND ND 140 Absent -- Faulkner 10222002 961 610 77 308 84 24 82 2 260 ND ND 310 82 100 17.7 ND --- 0.2 045 ND 80 ND 170 Absent -- Faulkner 128/2003 988 610 79 313 86 24 84 2 260 ND ND 310 92 106 189 ND -- ND 045 ND 160 ND 160 Absent -- Faulkner 429/2003 974 600 7.3 311 85 24 88 2 260 ND ND 310 92 104 18.5 ND -- ND 046 ND 160 ND 150 Absent -- Faulkner 8/13/2003 978 590 74 297 81 23 80 2 240 ND ND 300 90 106 17.6 ND --- 0.3 044 ND ND ND ND 3.6 Absent Faulkner 11/19/2003 971 610 69 292 79 23 80 2 240 ND ND 290 90 106 11.3 ND -- 0.2 0.4 ND ND ND ND Absent -- Faulkner 2/17/2004 982 590 70 302 83 23 82 2 240 -10 <10 290 91 107 16.0 10.3 - 0.1 0.4 <10 <50 <10 20 <Ll -- Faulkner 5/18/2004 994 590 6.7 311 85 24 84 2 240 <10 <10 290 94 107 15.2 <0.3 - 0.2 0.4 20 <50 <10 20 Q.1 -- Faulkner 8/24/2004 994 590 7.0 325 89 25 86 2 240 <10 <10 290 96 108 15.5 <0.3 -- 0.2 04 110 <50 <10 20 <I.1 -- Faulkner 1222004 987 600 7.3 322 88 25 84 2 240 <10 <10 290 100 113 15.1 <03 -- 0.2 0,4 <10 <50 <10 20 <I.1 --- Faulkner 2/23/2005 1,010 620 7.4 316 87 24 86 2 250 <10 <10 300 99 116 15.9 <0.3 - 0.2 0.4 <10 <50 <10 20 <I.1 -- Faulkner 5/112005 944 550 74 275 74 22 89 2 230 <10 <10 280 62 120 18.7 <0.3 - 0.2 04 <10 <50 <I0 20 <I.I -- Faulkner 8/302005 %3 640 7.4 293 81 22 80 2 320 <10 <10 390 99 123 12.9 <0.3 --- 02 04 <10 <50 <10 20 <1.1 -- Faulkner 11/152005 958 600 7.4 294 80 23 76 2 230 <10 <I0 280 98 107 132 1.1 -- 0.1 0.4 <10 <50 <10 <20 Faulkner 2/15/2006 936 590 73 302 83 23 82 2 230 <10 <10 280 97 102 12.3 10 - 0.2 04 <10 <50 <10 20 <LI - Faulkner 5/31/2006 943 570 7.5 302 83 23 78 2 230 <10 <10 280 99 100 12.5 10.3 - 0.2 04 <10 <50 <10 20 <11 -- Faulkner 8/21/2006 955 610 75 284 79 21 76 1 230 <IO <10 280 97 99 123 <0.3 -- 0.2 0.4 <10 <50 <10 20 <I.1 -- IIIXQUIS Pap 3 of9