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Herman 8c Helen s Marina Third Quarter 1998 C,runndw,sier Monitoring <br /> Novemher 23 1998 <br /> Page 8 <br /> . containers directly from the water treatment system valve labeled "distribution The vials were checked to <br /> assure that no air bubblcs were pTeSent Each sample container was labeled and placed in a cooler chilled with <br /> ice and delivered under chain-ot-custody procedures to GeoAnaiytical I aboratories, Inc , in Modesto, California, <br /> within 24 hours of sample collection Results of the laboratory analyses are discussed in Section 4 3 <br />' 4 2 LABORATORY ANALYTICAL METHODOLOGY <br /> The laboratory analytical methods for the surface water and drinking water samples collected on October 1, <br /> 1998, are sumrriarived in 1 able 5 <br /> TABLE 5 <br /> Laboratory Analytical Methods <br /> Analytes <br /> Surface Water _ Drinking Water <br /> r (rasolme (rasoline Volatile Organic <br /> Bl EX TPII-U Oxygenates/Additives Oxygenates/Additives Compounds* <br />' Analyticaethods 602 503WLUFT 8260 8260 8260 <br /> 0 3 gg/L(BTI) 1 0 gg/L 1 0µg/1 <br /> Detection Limits 0 6 gg/L(X) 0 OS mg/L 10 0 ggll (tert Butanol) 10 0 WL(tert Butanol) 1 0 20 gglL <br />' <br /> III I-X -benzent toluene ethyl btn,,tne and total xylenes <br /> TPH-(j total petroleum hydrocarbons quantified as gasoline <br /> Crasohnt Oxygenates/Additives methyl ttrtiary butyl ether(MTB ) c,thanol tertiary-butanol di-isopropvl ether(DIPf) ethyl <br />' tertiary-butyl ether(hTBF)and tertiary amyl methyl tther(TAME) <br /> 1(tftr to Iaboratory analytical data report for list of constituents <br />' 4 3 LABORATORY ANALYTICAL RESULTS <br /> None of the analytes of interest were detected at or above the laboratory reported detection limits in the surface <br />' water sample (IDCW) collected from the vicinity of the island drainage channel pump house BTFX, TPII-G, <br /> ethanol, tertiary-butanol, DIPE;, ETBE, and TAME were not detected at or above the laboratory reported <br /> detection limits in the surface water samples collected from the drainage ditch (samples DDN and DDS) and the <br /> eastern portion of the island drainage channel (IDCE), with the exception of toluene detected in DDN at a <br /> concentration of 2 3 gg/l MTBE was detected in surface water samples DDN, DDS, and IDCE in concentrations <br /> of 16, 4 7, and 1 2 gg/l, respectively <br />' MTBE was detected at a concentration of 2 0 lig/1 in the sample of the Marina's pre-treated drinking water <br /> (1432-1nf-1011198) None of the other analytes of interest were detected at or above laboratory reported detection <br /> limits in the pre-treated drinking water sample Chloroform, bromodichloromethane, and dibromochloromethane <br />' were detected in the sample of the Marina's treated drinking water at concentrations of 18, 6 1, and 3 0 µg/I, <br /> respectively No other volatile organic compounds or selected gasoline oxygenates/additives were detected at or <br /> above laboratory reported detection limits A summary of detected constituents in the surface water and drinking <br />' water samples is presented in Table 6, on the next page <br /> 1 <br />' �� CONDOR <br />