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55-gallon storage drum The purge bailer was thoroughly cleaned with Alconox and triple rinsed with distilled water prior to its use in each well After purging each well of three well casing volumes of water, a groundwater sample was collected from each well using a disposable polyethylene bailer The samples were care- fully poured from the bailer into three 40 ml glass vials (VOA vials) and two 1 liter amber glass bottles The sample bottles were labeled, recorded on a chain-of-custody form, and stored in a chilled ice chest for transportation to American Environmental Network - a State certified analytical laboratory A travel blank was prepared using distilled water to evaluate potential ' sample contamination Transport and handling of samples were performed under strict chain- of-custody protocol The groundwater analytical data sheets and chain-of-custody records are included as Appendix A The groundwater samples were analyzed for benzene, toluene, ethylbenzene and total xylenes (BTEX) and purgeable Total Petroleum Hydrocarbons (TPH) using EPA Methods 602 and 5030, respectively, and extractable TPH using EPA Method 3510 The travel blank was analyzed for BTEX Results of the recent groundwater chemical analyses are shown on Figure 3 and in Table 2, along with the historical groundwater data 4.0 DISCUSSION OF GROUNDWATER QUALITY Groundwater samples collected from Well MW-1 yielded the highest concentrations ' detected at the site Table 2 shows that the compounds detected in the sample collected from MW-1 included gasoline range TPH (TPH-g = 0 5 mg/L), diesel range TPH (TPH-d = ' 0 1 mg/L), benzene (10 µg/L), toluene (0 9 µg/L), ethylbenzene (6 µg/L), and total xylenes (6 µg/L)(see also Figure 3) This was the only sample that yielded detectable BTEX concentrations Diesel range TPH (TPH-d) was detected in the Wells MW-3 and MW-5, at concentra- tions of 0 06 and 0 2 mg/L, respectively No TPH and no BTEX compounds were detected in ' Wells MW-2 and MW-4 (Table 2 and Figure 3) No VOCs were detected in the travel blank 5.0 DISPOSAL OF DRUMMED PURGE WATER 1 R41820A 251950-2 2 I