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AIRCADIS GERAGHTY&MILLER <br />' to 170 ug/L and then by half again to 85 ug/L at 90 ft bgs The TPHg sample concentration <br />' then increased to 410 ug/L at the 1.10 ft depth TPHg in the deepest water sample in the profile <br /> was 350 ug/L at 118 ft bgs <br /> 1 BTEX compounds were detected ( PA Method 8020 in the water samples collected <br />' from all of the depths at which samples were attempted and the formation yielded sufficient <br /> water to conduct analysis The maximum concentration of benzene in groundwater was <br />' detected at the 60 ft bgs depth (1,200 ug/L) As with TPHg, the sampled concentrations of <br /> benzene declined at sample depths below 60 feet, to a concentration as low as 19 ug/L at the <br />' 90 ft bgs depth Sampled benzene concentration then increased to 130 ug/L at the i 10 ft bgs <br /> depth and 110 ug/L at 118 ft bgs Similar patterns are observed in the sample concentration <br />' depth distribution for toluene, ethylbenzene, and total xylenes <br /> MTBE was not detected in any of the groundwater samples collected, above a PQL of <br /> 5 ug/L, using the Snmulprobe from the NP-2 boring <br /> Analytic results derived from groundwater samples extracted in boring NP-2 using the <br /> Snmulprobe and analyzed in an on site mobile laboratory are summarized in Table 5-3 and <br />' illustrated in Figure 5-2 Detailed mobile laboratory results, QA/QC records, and Chain of <br /> Custody records for the field water sampling results are included in Appendix F <br />' <br /> 15.15 FIELD Q.4/QC RESULTS <br /> Equipment blank water samples (sample numbers EBI-50 and EB2-118) were <br /> nondetect for TPHg,MTBE, BTEX compounds <br />' 26 <br />