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OrOMATR x <br /> TABLE 1 <br /> Page 4 of 4 <br /> GROUNDWATER ELEVATIONS AND ANALYTICAL RESULTS <br /> GROUNDWATER MONITORING <br /> Constituent(results in micrograms per liter)4 <br /> EPA Methods 8021B and 8015M EPA Method 8015M EPA Method 8270C SIM <br /> TPHd TPHd w/o Benz(a)- <br /> Well TOC' Date DTW2 ElevaHoW Benzene Toluene Eth lbenzene Xylene TPHg <br /> MWE w/silica gel silica gel Na hthalene I Acenaphthylene Acenaphthene Fluorene I Phenanthrene Fluoranthene Pyrene anthraceneChr Bene <br /> MW-12 22.31 12/10/98 8.52 13.79 350 <10 130 240 2,600 1,900 -- -- - -- -- - -- -- - - <br /> (Cont.) 22.31 12/02/99 8.83 13.48 70 1.6 14 6.1 510 - 260 -- -- -- -- -- -- -- -- -- -- <br /> 22.31 11/03/00 8.66 13.65 180 1.2 6.1 2.4 740 - 170 1,600 0.4 <0.1 0.3 0.5 <0.1 <0.1 0.1 0.1 0.1 <br /> 22.31 05/02/01 8.80 13.51 -- -- -- -- -- - -- -- -- -- -- -- -- -- -- -- -- E <br /> 4 22.31 11/06/01 8.88 13.43 58 1.3 5.8 3.1 500 510 1,100 0.5 <0.1 <0.1 <0.1 <0.1 0.2 0.5 <0.1 <0.1 <br /> 22.31 06/04/02 8.91 13.40 --1 0-- -- -- -- -- -- -- - -- -- -- <br /> 22.31 11/26/02 8.84 13.47 70 .7 1 1 400 - 250(200)12 1,100 0.7 <0.1 0.2 <0.1 0.1 <0.1 <0.1 <0.1 <0.1 <br /> MW-14 21.89 04/30/96 8.67 13.22 <0.5 <0.5 <0.5 <0.5 <50 - -- -- -- -- -- -- -- -- -- -- -- <br /> 21.89 07/29/96 9.05 12.84 <0.5 <0.5 <0.5 <0.5 <50 <5.0 -- - - -- -- -- - - - - - <br /> 0 21.89 11/11/96 8.91 12.98 <0.5 <0.5 <0.5 <0.5 <50 -- <50 - - -- - -- -- -- -- -- <br /> 21.89 02/20/97 8.41 13.48 <0.5 <0.5 <0.5 <0.5 <50 - <50 <br /> y 21.89 05/08/97 8.74 13.15 <0.5 <0.5 <0.5 <0.5 <50 -- <50 -- -- - - - -- - - <br /> 21.89 09/17/97 8.92 12.97 <0.5 <0.5 <0.5 <0.5 <50 <5.0 <50 <br /> 21.89 12/01/97 8.25 13.64 <0.5 <0.5 <0.5 <2 <50 - -- - -- - -- -- -- - <br /> v 21.89 02/26/98 6.50 15.39 <0.5 <0.5 <0.5 <2 <50 -- <50 -- - - -- -- -- -- -- - <br /> 21.89 06/03/98 8.54 13.35 <0.5 <0.5 <0.5 <2 <50 -- <50 - -- -- -- -- - -- -- -- <br /> 21.89 12/10/98 8.65 13.24 <0.5 <0.5 <0.5 <0.5 <50 - <50 -- -- -- -- -- -- - -- <br /> 21.89 12/02/99 8.88 13.01 <0.5 <0.5 <0.5 <0.5 <50 - <50 -- - -- -- -- -- - - <br /> 21.89 11/03/00 8.61 13.28 <0.5 <0.5 <0.5 <0.5 <50 - <50 <50 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 <br /> 21.89 05/02/01 8.93 12.96 -- -- -- -- -- - <br /> -- - -- -- -- -- <br /> 21.89 11/06/01 9.04 12.85 <0.5 <0.5 <0.5 <0.5 <50 -- <50 <50 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 <br /> 1. Top-of-casing(TOC)elevation in feet above mean sea level(MSL). <br /> 2. Depth to water(DTW)in feet below top of casing. <br /> 3. Groundwater surface elevation in feet MSL. <br /> 4. TPHg=total petroleum hydrocarbons quantified as gasoline;TPHd=total petroleum hydrocarbons quantified as diesel;MtBE=methyl tertiary butyl ether;only detected PAHs(polycyclic aromatic hydrocarbons)are listed in this table; <br /> <=less than; --=not sampled or not analyzed. <br /> 5. The laboratory reported that benzene detection was not confirmed by GC/MS(Method 8260 screen)and should be considered a false positive result. <br /> 6. ve=concentration exceeded the established calibration range;the reported value is an estimate. The laboratory did not notice this until after the sample holding time had exceeded,as such,the sample was not diluted and reanlyzed. <br /> 7. The%recovery of the surrogate for the TPHg and BTEX(benzene,toluene,ethylbenzene,and xylenes)analysis was outside the control limit due to interference with compounds in the sample matrix. <br /> 8. The%recovery of the surrogate for the PAH analysis exceeded the upper control limit. <br /> 9. Well was resampled because of detection in the original sample. <br /> 10.Wells MW-10 and MW-14 were decommissioned on December 5,2001,in accordance with the State and County requirements. <br /> 11.The sample was diluted for ethylbenzene. <br /> 12.Sample extracts passed through a silica gel column twice prior to analysis. <br /> 1APmjec8C2463\wkAA246312-02 tbllald rr.blc 11 <br />