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DETECTION MONITORING PROGRAM ANALYTICAL RESTILTS AND COMPLIANCE SUMMARY <br /> FOURTH QUARTER 2007 <br /> AUSTIN ROAD UNIT <br /> SAN JOAQUIN COUNTY,CALIFORNIA <br /> Background <br /> Well <br /> Concentration AMW-2 AMW-6 AMW-7 AMW-12 AMW-13 AMW-14 <br /> Analyte Units Limit 11/5/07 11/7/07 11/7/07 11/7/07 11/6/07 1 11/6/07 <br /> Field Parameters <br /> H Units 6.592-8.333 7.15 6.93 7.37 6.74 6.62 6.60 <br /> Specific Conductance P1nhos/cmj 1436 6541 3681 4321 6671 3 <br /> Temperature °C 21.5 18.81 18.41 19.81 18.21 18.61 18.8 <br /> Turbidity NTU 97 01 0 0 1 01 01 0 <br /> Monitoring Parameters <br /> Arsenic mg/1 0.007341 0.0035 0.0040 0.0038 0.0041 0.0034 0.0029 <br /> Barium m I 0.2454 0.092 0.140 0.190 0.220 0.290 0.230 <br /> Bicarbonate m I 511.1 310 170 190 350 440 320 <br /> Calcium mg/1 145.2 64 38 42 71 88 71 <br /> Carbonate m /I 12 3(i 1 _. <br /> Chloride mg/1 78.94 30 37 42 40 50 53 <br /> Chromium Hexavalent m 0.005 0.00440.0048 0.0056 0.0022 0.0024 04014', <br /> Gas Range Organics mg/1 0.025 0 U093, v 0, 3_ t 133',�x. 0.."000 1 ;10 l s :`0.42'X' <br /> Magnesium mg/1 67.18 31 18 20 33 47 36 <br /> Nitrate as N m /I 76.8 15 2.8 6.0 10 12 10 <br /> Oil and Grease m /I 5 I.9 1.9- <br /> Potassium mg/1 11.19 7.3 6.1 8.4 4.1 6.9 5.2 <br /> Sodium m /I 79.74 53 23 281 501 49 43 <br /> Strontium mg/1 1411 0.690 0.390 0.5901 0.770f 0.980 0.800 <br /> Sulfate m /I 152 59 26 241 :::::511: 62 51 <br /> Total Dissolved Solids rn I 994.2 540 340 3801 5301 500 560 <br /> Volatile Organic Compounds <br /> I,I-Dichloroethane /I 0.5 0 1 0.11 48 b 2 <br /> cis-1,2-Dichloroethene Ig1l 0.5 0-1, 01L 011 0,11: 0.60 <br /> Tetrachlomethene /I 0.5 x.1.1 0.28;0 11 12 16 <br /> Trichloroethene /I 0.5 0.13 - 0:10.13 0,13 3.8 1.4 <br /> Notes: <br /> Concentration Limits submitted by Herst Associates,Inc. <br /> r=Only volatile organic compounds reported above detection limits shown <br /> °C=degrees Celsius <br /> mg/1=milligrams per liter <br /> NTU=nephelometric turbidity units <br /> NC=Not calculated <br /> mg/1=micrograms per liter <br /> µmhos/cm=micromhos per centimeter <br /> Indicates that the analyte was not detected above laboratory practical quantitation limit. <br /> Value listed is laboratory detection limit or estimated trace(BOLDED)concentration. <br /> NA'Not Analyzed <br /> GL4,2001 043'AKL 4Q07 TW,s_s1,1'1_4:1_008 <br /> Geologic Associates <br />