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<br /> 15 October 2002 i
<br /> AGE-NC Project No 97-0333
<br /> ' Page 3 of 8
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<br /> ' 2 4 INFLUENT MONITORING RESULTS
<br /> In accordance with the requirements of CMPWD Industrial Wastewater Discharge Permit No 02-1,
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<br /> ' monthly ground water pump-and-treat influent sampling was performed for laboratory analysis of
<br /> TPH-g, TPH-d, BTEX, MTBE, DIPE, TAME, ETBE, TBA,PCE, TCE and total lead on 01 April,
<br /> 17 April, 22 May and 06 June 2002
<br /> Influent water samples collected on the above dates detected TPH-g at c oncentrations as high as
<br /> 63,000 µg11, TPH-d as high as 1,400 µg11, BTEX constituents as high as 8,600 µg/1 (toluene) and
<br /> MTBE (by EPA Method 8260) at concentrations as high as 90,000 gg/l, PCE was detected on one
<br /> occurrence at a concentration of 750 µg/1 The laboratory analysis did not detect any other
<br /> constituents of concern Analytical results of pump-and-treat influent-water samples (McCampbell
<br /> Analytical Inc Work Orders 0204315 and 02205330 and Castle Analytical,Laboratory Lab No
<br /> 4756-1W to -3W) are summarized in Table 2, laboratory reports are in Appendix A
<br /> 25 EFFLUENT MONITORING RESULTS
<br /> lie In accordance with the requirements of CMPWD Industrial Wastewater Discharge Permit No 02-1,
<br /> monthly ground water pump-and-treat effluent monitoring was performed for flow rate, specific
<br /> conductivity(EC),pH,temperature,dissolved oxygen(DO),TPH-g,TPH-d,BTEX,MTBE,DIPE,
<br /> ' TAME, ETBE, TBA, PCE, TCE and total lead
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<br /> Laboratory analysis of pump-and-treat effluent grab water samples collected on 01 April, 17 April,
<br /> ' 22 May and 06 June 2002 did not detect any constituents of concern except TBA on 17 April 2002
<br /> at a concentration of 7'6 [tg/l, no other target analytes were detected Analytical results are
<br /> ' summarized in Table 2, laboratory reports are in Appendix A
<br /> Utilizing an Oakton water analyzer in the field, electrical conductivity values were monitored '
<br /> ' between 1,078 and,1,225 gnihos/cm, pH values were monitored between 6 65 and 7 64,,DO was
<br /> I monitored between 3 89 and 4150 mg/1 and temperature values monitored between 16 1'C and 22 8
<br /> 'C Field monitoring results are summarized in Table 3 ,
<br /> Utilizing a Blue-White Industries F-2000 flow meter,total flow(totalizer)was recorded between 01
<br /> April and 06 June 2002 (Table 3) During this time,the pump-and-treat interim remediation system
<br /> was in operation for approximately 67 days Based on 123,453 gallons,of water recorded during this
<br /> time,AGE estimated that an average 1,842 gallons ofwater was discharged per day during this time
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