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Table 1: Current and Past Groundwater Elevations <br /> Groundwater Elevations (ft msl) <br /> Date DMW-1 DMW-2 DMW-3 DMW-4 DMW-5 <br /> 01/16/97 -3385 -3381 -3390 -3379 -3386 <br /> 07/11/97 -31 37 -31 67 -31 62 -31 55 -31 67 <br /> 01/09/98 -3238 -3241 -3235 -3231 -3246 <br /> 07/23/98 -2293 1 -2301 -2299 1 -2296 1 -2301 <br /> ft msl - elevation in feet based upon mean sea level <br /> 2.4 GROUNDWATER ANALYTICAL RESULTS <br /> The TPH-d results reported for groundwater samples are presented in Table 2 TPH-d was <br /> reported as being below detection limits in each of the groundwater samples, with a detection <br /> limit of 50 micrograms per liter (,ug/L) An evaluation of the laboratory report by the Dames & <br /> Moore Quality Assurance/Quality Control (QA/QC) group concluded that the analytical data are <br /> acceptable See Appendix C for a copy of the laboratory report and QA/QC report <br /> Table 2: Reported TPH-d Analysis of Groundwater Samples <br /> Field Parameters <br /> Laboratory <br /> Well No pH Electrical Conductivity Temperature Analysis <br /> (gmhos/cm) (aF) TPH-d (ug/L*) <br /> DMW-1 742 1,190 703 ND <br /> DMW-2 756 957 752 ND <br /> DMW-3 720 1,129 74 1 ND <br /> DMW-4 1 699 1,339 743 ND <br /> DMW-5 742 1,069 1 723 ND <br /> DMW-20 (duplicate sample of DMW-2 ND <br /> * The detection limit for TPH-d is 50 ug/L ND - not detected, below detection limits <br /> 3 <br /> 11DM_SACT\SYS1WORDPROC1sac1044misc19809_06 doc <br /> DAMES&MOORE <br />