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1111111111111111110 <br /> TA� •SUMMARY OF GROUNDWATER ELEVATION AND ANALYTICAL DATA <br /> STOCKTON MAINTENANCE STATION <br /> STOCKTON,CALIFORNIA <br /> Dtptb To (yreunt1water TPH-C. TPit-P Aam-4 Tolacne Ethy# henwip Iola! ) <br /> Xykmvx <br /> 13ielt7.A 000 TOC Elevation Groundwater EEevattam {Ng1ll (p�fq (lsgA) (}eg11) (pg(II >NF1) <br /> VW 2 02/06/1996 21 90 6317 41 27 16000 <50 3 000 3 100 260 2000 <50 <br /> VW 2 04/11/1996 21 90 6163 3973 <br /> VW 2 04/23/1996 21 90 6137 3947 54 000 <50 8 100 5 600 290 6 500 60 <br /> VW 2 07/02/1996 2190 6019 3829 20 000 1 400 30M 1 700 200 1 700 53 <br /> VW 2 10/23/1996 21 90 6055 3865 17 000 570 4200 1 300 89 430 43•• <br /> VW 2 05/2911997 2190 5557 3367 15 000 <500 2 300 1 600 380 2200 29 <br /> VW 2 10/17/1997 21 90 3719 3529 11 000 <500 1 800 580 170 870 22 <br /> VW 2 12/29/1997 21 90 5699 3509 10 000 570 1 300 1 400 230 l 200 <5 <br /> VW 2 03/16/1998 21 90 5370 3180 7 400 10000 1 100 860 180 1 too <5 <br /> VW 2 06/26/1998 2190 4987 2797 9 000 <5000 1 406 610 330 2 100 (<5) <br /> VW 2 09/28/1998 21 90 5175 2985 8 400 <5000 1 800 530 400 1 900 75(37 4) <br /> VW 2 12/02/1998 21 90 4989 2799 7 800 2900 1 100 360 290 l 100 38(54 <br /> VW-2 03/31/1999 2218 4651 2433 2 100 320 1 500 460 750 1 950 83 <br /> VW 2 06/28/1999 2218 4674 24 56 5 700 <100 865 57 <0 2 302 76' <br /> VW 2 09!2311999 2218 4959 27 41 4 300 300 1 270 96 399 869 32' <br /> VW 22' 09!23/1999 NA NA NA 4800 450 1 230 100 418 878 30' <br /> VW 2 01/06/2000 2218 4839 2621 7 800 500 873 164 439 1 180 <0 6t <br /> VW 2 03/23/2000 22 18 4583 2365 Sum) 2flQ 9443 11D 4$X 122-9 '�3 <br /> Notes <br /> TOC=Top of casing elevation,MSL= Mean Sea Level <br /> TPH G=Total Petroleum Hydrocarbons as Gasoline by EPA Method 8015M <br /> TPH D-Total Petroleum Hydrocarbons as Diesel by EPA Method 8015M <br /> BTEX-Benzene Toluene Ethylbenzene and Total Xylenes by EPA Method 8020 <br /> MTBE-Methyl Tertiary Butyl Ether by EPA Method 8020 <br /> NA=Not applicable <br /> <=Less than method detection limit <br /> -- -Not measured,samp)ed tested,or present <br /> Denotes duplicate sample taken <br /> All groundwater level measurementa are presented m feet <br /> mg/l=milligrams per liter <br /> pWI=micrograms per liter <br /> (<5)=MTBE concentration as calculated by EPA Method 8260 <br /> t Denotes MTBE samples analyzed by EPA Method 8260B <br /> NR denotes Not Reported <br /> NU denotes laboratory analysis data not used due to exoeedenee of sample holding times <br /> All data pnor to 3/1199 was provided by the previous consultant(PSI) <br /> A")'alter the laboratory result indicates that the compound was detected above the method detection limit,but below the labors[ reporting limit <br /> rm rni.ar..d. Page 9 of 9 <br />