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15 January 2001
<br /> AGE-NC Project No 96-0232
<br />' Page 11 of 20
<br />' ,ug/l utilizing EPA Methods 8020 and 8260, respectively, MTBE was detected in the 06 December
<br /> 2000 grab water sample at concentrations of 350 and 450µg/1, respectively Ethanol was detected
<br /> in the 06 December sample at a concentration of 2,600 µg/l The laboratory analysis did not detect
<br />' any other constituents of concern Analytical results of pump and treat influent-water samples are
<br /> summarized In Tables 2 and 4, laboratory reports are in Appendix F
<br />' 7 3 EFFLUENT MONITORING
<br /> In accordance with the requirements of Attachment B's Monitoring and Reporting Program to
<br /> General Order No 5-00-119, monthly monitoring of the ground water pump and treat efffluent for
<br /> flow rate, specific conductivity(EC),pH, temperature, total dissolved solids (TDS),TPH-g, TPH-d,
<br />' TPH-mo, BTEX, MTBE, methanol, ethanol, DIPE, TAME, ETBE, TBA, nitrate and total lead was
<br /> performed on 30 November and 06, 13, 21 and 27 December 2000, additionally, ground water pump
<br />' and treat effluent quarterly sampling for bioassay analysis was performed on 06 December 2000
<br /> Analysis of a grab water sample collected on 06 December 2000 detected nitrate as NO3 in the pump
<br />' and treat effluent at a concentration of 40µg/l, temperature was recorded in the laboratory at 19 7
<br /> degrees Celsius, EC at 1,130µmhos/cm, TDS at 690 mg/L and pH at 7 3 Analytical results of nitrate
<br /> as NO3 and analysis for EC, pH and TDS are summarized in Table 4
<br />' Laboratory analysis of grab water samples collected from the effluent stream on 30 November and
<br /> 06, 13, 21, 27 December 2000 did not detect any petroleum constituents of concern, laboratory
<br />' analysis of grab water samples collected on 06 December 2000 from the outlet of GAC media
<br /> vessels (GAC-1 and GAC-2) and the outlet of the first SunSolve media vessel (SS-1) did not detect
<br /> any petroleum constituents of concern Analytical results are summarized in Table 2
<br />' A bioassay laboratory analysis was performed on a grab sample collected from the effluent stream
<br /> on 06 December 2000 The analysis utilized sample factors of 0 ml, 125 ml, 500 ml, 1,000 ml, 1,500
<br /> ml and 2,000 ml Each sample factor was tested with 20 Fathead minnow fish and a"utron volume
<br /> of 2,000 ml of di-ionized water, pH, dissolved oxygen (DO) and temperature parameters were
<br /> monitored and fish mortalities were counted over 96 hours The bioassay analysis reported a steady
<br />' decrease in pH and DO in each sample factor over the 96 hour period, the analysis reported
<br /> decreasing pH and DO values with Increasing sample factors Temperature measurements vaned
<br /> between 19 5 and 20 5 degrees Celsius The laboratory reported that there were no fish mortalities
<br />' in the above referenced sample, the laboratory analyzed a duplicate sample and reported one fish
<br /> mortality in the 1,000 ml sample factor after 48 hours and a second fish mortality in the 1,000 ml
<br /> sample factor after 96 hours The bioassay analysis Is summarized in Table 5, laboratory reports are
<br />' in Appendix F
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<br /> Advanced GeoEnvironmental,Inc
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