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17 November 2006 AGE-NC Project No. 01-0865 Page 2 of 5 ETBE of 15 µg/1, and TAME of 17 µg/1. • The sample collected from between the first and second granular activated carbon (GAC) vessel(GAC-1)reported a TPH-g concentration of 200 µg/1,MTBE of 24 µg/1 and TBA of 5,000 µg/l. • The sample collected from between the second and third GAC vessel (GAC-2) reported a TPH-g concentration of 220 µg/1 and TBA concentration of 6,300 µg/1. • The sample collected from between the third and fourth GAC vessel (GAC-3) reported a TBA concentration of 3,000 41. • The sample collected from the fourth GAC vessel (Effluent-W) reported a TBA concentration of 1,200 µg/l. On 14 November 2006, AGE re-sampled the influent, each vessel and effluent ports for: • TPH-g in accordance with EPA Method 8015 Modified; • BTEX) and the fuel additives MTBE, DIPS, ETBE, TAME, and TBA by EPA Method 8260B. On 16 November 2006, AGE received the results of the 14 November 2006 sampling event: • The sample collected from the influent sample(Influent-W)reported a TPH-g concentration of 150 µg/1,MTBE of 150 µg/1,TBA of 4,500µg/1,ETBE of 14µg/1,and TAME of 18 µg/1. • The sample collected from between the first and second GAC vessel (GAC-1) reported TPH-g at 170 gg/1, MTBE at 21 µg/I and TBA at 4,900 µg/1. • The sample collected from between the second and third GAC vessel (GAC-2) reported TPH-g at 230 µg/1 and TBA at 7,000 µg/1. • The sample collected from between the third and fourth GAC vessel(GAC-3)reported TBA at 3,100 µg/1. • The sample collected from the fourth GAC vessel(Effluent-W)reported TBA at 1,100µg/1. No other constituents of concern were reported in the samples collected on 01 and 14 November 2006. On 16 November 2006, AGE sampled discharge points at R-2 and directly below the point of discharge pipe for TBA in accordance with EPA Method 826011;discharge point R-1 was dry.TBA Advanced GeoEnvironmental,Inc.