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I i✓ � Geomatrix TABLE 2 Page 4 of 4 • ' GROUNDWATER ANALYTICAL DATA Volatiles' Dissolved ' Monitoring TPHgz u Lead Well' Date /L B T E X MtBE OWL) MW3-6 02/20/03 6 6,800 1,700 80 69 280 <0 5 3 1 05/29/03 1,000 1,030 85 59 110 na na 08/22/03 7,970 1,890 614 658 249 na na 10/16/03 688 875 25 3 166 827 na na ' 02/26/04 312 792 207 106 545 na na 04/01/04 2,900 890 43 0 320 91 na na 05/18/04 4 ns ns ns ns ns ns ns 05/21/04 327 411 176 114 450 na na 09/23/04 3,800 1,800 43 33 160 <25 na 12/17/04 3,900 1,300 <50 <50 64 na na 02/24/05 2,700 1,200 <25 <25 54 na na 06/01/05 2,800 1,000 <50 <50 <50 na na 08/25/05 3,300 1,500 <17 <17 26 na na ' 11/22/05 4,300 1,200 <50 <50 <50 <50 na 02/24/06 1,800 390 5 1 72 97 na na 05/25/06 1,100 390 59 87 32 na na Monitoring well locations are shown on Figure 2 2 TPHg=total petroleum hydrocarbons quantified as gasoline analyzed using U S Environmental ' Protection Agency(EPA)methods 8015Cm or 8260B Results reported in micrograms per liter(Ag/L) <=less than the detection limit for purpose of reporting 3 B=benzene,T=toluene,E=ethylbenzene,X=total xylenes(sum of m,p-xylene and o-xylene), analyzed using U S EPA methods SW8260B or SW8021 B Results reported inµg/L na=not analyzed for constituent ns=not sampled ND=not detected U=data are qualified as not detected because concentration is less than five times the blank concentration 4 Wells MW3-1 and MW3-6 were not sampled on May 18,2004 ' S Well MW3-3 was not sampled because a temporary earth ramp covered the well location 6 Sample was also analyzed for 1,2-dlchloroethene,dusopropyl ether,ethyl tertiary butyl ether, and tertiary amyl methyl ether using EPA Method 8260 These constituents were not detected 7 Detections in wells MW3-4 and MW3-5 are inconsistent with historical results ' 8 Wells MW3-4 and MW3-5 were resampled on December 21,2005 I • 11(01*r\6437 Do01A,0111ve%437 1142 xis