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30 January 2004
<br /> AGE-NC Project No 96-0232
<br /> Page 4 of 15
<br /> 24 INFLUENT MONITORING RESULTS
<br /> In accordance with the requirements of RWQCB Monitoring and Reporting Program No 5-00-119,
<br /> ground water pump-and-treat influent samples were analyzed for TPH-g, TPH-d, BTEX, MTBE,
<br /> methanol, ethanol, DIPE, TAME, ETBE, TBA, 1,2-DCA, EDB and total lead (quarterly basis) on
<br /> 06 November, 19 November and 09 December 2003
<br /> Influent water samples collected on 06 November, on 19 November and on 09 December 2003
<br /> detected MTBE(by EPA Method 8260) at concentrations of 31 micrograms per liter(µg/1), 27 µg/1
<br /> and 20 µg/1, respectively (Table 1) The laboratory analysis did not detect any other petroleum
<br /> constituents of concern Analytical results ofpump-and-treat influent-water samples are summarized
<br /> in Table 1, laboratory reports are in Appendix B
<br /> 25 EFFLUENT MONITORING RESULTS
<br /> In accordance with the requirements of RWQCB Monitoring and Reporting Program No 5-00-119,
<br /> • monthly ground water pump-and-treat effluent monitoring was performed for flow rate, specific
<br /> conductivity(EC), pH, temperature, total dissolved solids (TDS), TPH-g, TPH-d, BTEX, MTBE,
<br /> methanol, ethanol,DIPE, TAME,ETBE, TBA, 1,2-DCA, EDB and nitrate on 06 November, on 19
<br /> November and on 09 December 2003,in addition,a bioassay was performed on the quarterly effluent
<br /> sample collected on 09 December 2003
<br /> Laboratory analysis of pump-treat effluent grab water samples collected on 06 November, 19
<br /> November and 09 December did not detect any petroleum constituents of concern Analytical results
<br /> are summarized in Table 1, laboratory reports are in Appendix B
<br /> Nitrate as NO}was detected on 06 November, 19 November and 09 December at concentrations of
<br /> 31 mg/l, 43 mg/1 and 40 mg/l, respectively, TDS values were reported on the same dates at
<br /> concentrations between 785 mg/l, 576 mg/1 and 559 mg/l, respectively Analytical results are
<br /> summarized in Table 2, laboratory reports are in Appendix C
<br /> A bioassay laboratory analysis was performed on the grab sample collected from the effluent stream
<br /> on 09 December 2003 Six 2,000-m1 dilution volumes consisting of 0%,6 25%,25%,50%, 75%and
<br /> 100% effluent water to deiomzed water were tested with 20 Fathead minnow fish each, pH,
<br /> dissolved oxygen (DO) and temperature parameters were monitored and fish mortalities were
<br /> counted over 96 hours Temperature measurements generally varied between 19 1 and 20 7 degrees
<br /> Celsius (°C), pH measurements generally vaned between 7 50 and 8 00 and DO measurements
<br /> generally varied between 7 50 mg/1 and 8 80 mg/1 The laboratory reported that there were a total of
<br /> zero fish mortalities after 96 hours in the above referenced sample,laboratory analysis of a duplicate
<br /> Advanced GeoEnrironmental,Inc
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