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"al3I 0 • Groundwater M itorin9 Data A. Teichert & Son, Inc., Facility . 103 North E Street, Stockton, California Page 4of4 Date Depth to Top of Casing Groundwater FW111 Monitored Groundwater ft Elevation Elevation TPHG Benzene 'Toluene Ethylbenzene Xylenes W-13 11/13/95 61.30 19.99 -41.31 NS NS NS NS NS W-13 02/02/96 61.82 19.99 -41.83 32000 84 490 190 1900 W-13 04/16/96 57.35 19.99 -37.36 NS NS NS NS NS W-13 05/17/96 57.39 19.99 -37.40 NS NS NS NS NS W-13 09/14/98 49.01 19.99 -29.02 NS NS NS NS NS W-13 03/16/99 44.69 19.99 -24.70 5100 55 370 100 1000 W-14 07/05/94 68.40 20.05 -48.35 6000 240 340 80 250 W-14 09/19/94 71.88 20.05 -51.83 9600 440 520 120 230 W-14 12/19/94 68.84 20.05 -48.79 2200 3100 3400 900 4400 W-14 02/22/95 67.18 20.05 -47.13 2200 42 27 14 84 W-14 03/16/95 66.54 20.05 -46.49 1900 46 14 15 63 W-14 05/30/95 64.49 20.05 -44.44 2500 320 79 74 54 W-14 08/30/95 65.25 20.05 -45.20 470 28 2.6 2.8 11 W-14 11/13/95 64.40 20.05 -44.35 300 2.7 3.0 1.9 19 W-14 02/02/96 61.93 20.05 -41.88 17000 12 25 67 440 W-14 04/16/96 58.13 20.05 -38.08 NS NS NS NS NS W-14 05/17/96 57.88 20.05 -37.83 2500 45 9 24 160 W-14 10/09/98 49.60 20.05 -29.55 500 <0.5 <0.5 <0.5 5.5 W-14 03/16/99 44.72 20.05 -24.67 1100 <2" <2" <2" 6 Analytical results prior to March 1995 were obtained from other consultants'reports. ND=Not detected. <=Below detection limits used by laboratory. "=The MRL was elevated due to high analyte concentration requiring sample dilution. =Information not available. S=Not sampled. IM=Not measured. Elevations relative to the City of Stockton bench mark number B.B. 1-11 located in a planter at the front of the Fair Oaks Library at 2370 East Main Street,Stockton. Results measured in parts per billion(pph). '=The chromatogram does not match the typical gasoline finge rint. I CPIE:ITEICHERTIQTRLY\STKNQ 199.XLS ;D&"&