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<br /> 31 January 2003
<br /> • AGE-NC Project No 96-0232
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<br /> Iby EPA Method 8020,
<br /> • Methanol, ethanol, tertiary butanol (TBA), di-Isopropyl ether(DIPE),'ethyl tert butyl ether
<br /> (ETBE),tert amyl methyl ether(TAME),MTBE, 1,2-dlchloroethane(1,2-DCA)and ethylene
<br /> dibromide (EDB) by EPA Method 8260 Modified,
<br /> • Total lead (quarterly sampling frequency, Influent samples only) by EPA Method ,
<br /> 6010/2007, 1 -
<br /> Nitrate as NO3 by EPA Method 353 3 (effluent samples only), and
<br /> I • Aquatic toxicity (Bioassay) by EPA Method EPA 600/4-90/027F (quarterly sampling
<br /> frequency, effluent samples only)
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<br /> IReceiving water samples were logged on a chain of custody form, placed in a chilled container and
<br /> transported to a DHS-certified laboratory for analysis for
<br /> • Total dissolved solids by EPA Method 160 1 (quarterly sampling frequency), and
<br /> • Turbidity by EPA Method 180 1 r
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<br /> 24 INFLUENT MONITORING RESULTS
<br /> In accordance with the requirements ofRWQCB 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, 1,2-15CA and EDB
<br /> Influent water samples collected on 21 November and 05 December 2002 detected MTBE(by EPA
<br /> Method 8260) at concentrations of 13 µg/l, and 21 gg/l, respectively (Table 1) The laboratory
<br /> analysis did not detect any other constituents of concern Analytical results of pump-and-treat
<br /> Influent-water samples are summarized in Table 1, laboratory reports are in Appendix B
<br /> 25 EFFLUENT MONITORING RESULTS
<br /> In accordance with the requirements ofRWQCB 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, in addition, a bioassay
<br /> was performed on the quarterly effluent sample collected on 03 December 2002
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