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(MAR11 RE) M01,11(1RIh(, RE PORT 00011ct 1997 C ANl PA S C AR WAY I h_'1(5 I'I01L A\LIMC MM0011 LA Dcc�cunbcr10lU 1997 5 0 DISCUSSION OF RESULTS ' The average depth to groundwater was approxrinately 41 3 feet bgs at the site The groundwater elevation ran4ved from 28 82 to 27 73 feet below sea level (brnsl) During the past three years the depth to oroundwater at the site has ranged frorn appro•nnatek 51 feet to 40 feet bgs The groundwater elevation contour map (Figure 3 Appendix A) indicates groundwater mounding In the center of the site in the vicinity of MW-1 and MW-2 This Is generally, consistent with previous Imonitorim, results The results of the laboratory analyses of the gru ondwater samples collected during the October 1997, ' monitoring event indicate that groundwater samples collected from MW-I, M W-2, MW-4, MW-7, and SV-5 contained detectable concentrations of TPH-G or BTEX in the groundwater In addition, MTBE was detected in the groundwater samples collected from MW-1 MW-2 MW-3, and SV-5 Tire I gasoline oxygenates/additives excluding MTBE, were not detected at or above the laboratory reported detection limits 1n any of the samples analyzed No TPH-G or BTEX %%ere detected at or above reported laboratory detection limits in the groundwater samples collected from MW-3 MW-5 MW-6 Ior MW-8 The results of intrinsic bioremediation parameter measurments does not clearly indicated a strong indication that bioreinedlation is occurring in the ground«ater at the site The collection of the parameters was conducted as a baseline study and "ill not be collected in any subsequent quarterly monitorin{y Total dissolved iron analysis \aas conducted on the ground«ater sample collected from SV-5 to evaluate, possible scaling that ma} occur once the SVE system is rummn�(T Total dissolved iron was not detected at or above laboratory rEported detection limit in the SV-5 Sample The nevt quarterly monitoring event is scheduled for January 1998 if \ou need additional information or have any questions, please contact us at (209) 668-9234 RespectfullN submitted, ii!p (',E DONWD f.IQiESS /f I �? ,,;4- r1�„iri 1•A��t� .n NO.6430 ti�lri t•' r`rrPCCP Protect Geologistollst i0tered l �; #643 (vul„'( ti�sn� 'r �� CONDOR