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1 13 April 2001 AGE-NC Project No 96-0232 ' Page 4of14 ' 2 5 TREATMENT CANISTER MONITORING Water samples were collected on 03 January, 02 February and 08 March 2001 from Intermediate ' sampling ports located at the outlet of granular activated carbon(GAC) media vessel no 1 (GAC-1), at the outlet of granular activated carbon media vessel no 2 (GAC-2) and at the outlet of the Sunsolve media vessel no 1 (SS-1) ' Laboratoryanalysis of a 03 Jan 2001 water sample collected GAC-ys airy p cted from the outlet of GAC 1 detected MTBE (utilizing EPA Method 8260) at a concentration of 71 µg/l, laboratory analysis of the 02 February 2001 water sample collected from the outlets of GAC-1 and GAC-2 detected MTBE at concentrations of 5 4 and 3 9 µg/1, respectively, MTBE was not detected in intermediate water ' samples collected during the 08 March 2001 sampling event No other petroleum constituents of concern were detected during the three sampling events I2 6 EFFLUENT MONITORING a In accordance with monthly requirements of RWQCB Monitoring and Reporting Program No 5-00- lie 119, ground water pump and treat effluent monitoring was performed for flow rate, specific conductivity(EC), pH, temperature, total dissolved solids (TDS),TPH-g, TPH-d, TPH-mo, BTEX, MTBE, methanol, ethanol,DIPE, TAME, ETBE, TBA, nitrate and total lead on 03 January, 02 and 06 February, 08 March and 09 March 2001, additionally, ground water pump and treat effluent quarterly sampling for bioassay analysis was performed on 09 March 2001 Analysis of pump and treat effluent grab water samples collected on 03 January and 09 March 2001 detected nitrate as NO3 at concentrations of 49 and 10 2 1,4g11, respectively EC values were reported in effluent water samples on 03 January, 06 February and 09 March 2001 at 925, 994 and 975 µmhos/cm, pH values were reported on the same days at 7 8, 7 3 and 7 6 Laboratory analysis of effluent water samples collected on 03 January and 09 March 2001 reported TDS values at 670 and 610 mg/L,respectively Analytical and field monitoring results are summarized in Table 2 Laboratory analysis of grab water samples collected from the effluent stream on 03 January, 02 February and 08 March 2001 did not detect any petroleum constituents of concern, analytical results are summarized in Table 1 A bioassay laboratory analysis was performed on the grab sample collected from the effluent stream on 09 March 2001 The analysis utilized sample factors of 0 ml, 125 ml, 500 ml, 1,000 ml, 1,500 ml and 2,000 ml Each sample factor was tested with 20 Fathead minnow fish and a dilution volume of 2,000 ml of di-ionized water, pH, dissolved oxygen (DO) and temperature parameters were . monitored and fish mortalities were counted over 96 hours The bioassay analysis reported a steady Advanced GeoEnvironmental,Inc