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r r , r y 18 April r 2003 II " r!r VI' , nr, I nr a ,r � I i AGE-NC ProjectNo 97-0333 ' ' I I ' I I f, I Page 3 of 11I«1I r "I „ii u i• i „'r I i I, F i placed in a chilled container and transported to a California Department of Health Services (DHS)- i certified laboiatory for analysis for I Total petroleum hydrocarbons quantified as gasoline and diesel (TPH-g"and TPH-d, respectively) by EPA Methods 3550/5030/8015 Modified, I�' `' • 'Benzene,toluene,ethyl benzene and xylene(BTEX)and methyl-tertiary butyl ether(MTBE)' by EPA Method 8020, ' rp 4 ITetrachloroethene (PCE); trichloroethene (TCE), 1,2-dichloroethane (1,2-DCA), ethylene I !; di-bromide (EDB), tertiary butanol (TBA), di-isopropyl ether(DIPE), ethyl tert butyl ether ; (ETBE), tert amyl methyl ether(TAME),and MTBE by EPA Method 8260 Modified, and' ti Total lead (quarterly sampling frequency) by EPA Method 6010/200 7 i ' n 24 INFLUENT MONITORING RESULTS } 1 I , r r I y I In accordance with the requirements of CMPWD Industrial Wastewater Discharge Permit No 02-1, + lobmonthly ground water pump-and-treat influent sampling was performed on 18 October, 11 November and 12 December 2002 for laboratory analysis of contaminants lis#ed in Section 2 3 ' 1 r During all three monthly monitoring events,influent water samples detected TPH-g at concentrations as high as 8,700 µg/l, TPH-das high as 430 µg/l and'BTEX constituents as high as 980 µg11 1 ' N (toluene), in the October samlple The highest benzene concentration also was detected in ' October 2002, at a concentration of 280 µg/1 MTBE was detected by EPA Method 8260 at { ;� concentrations as high as 13,000� 11 g/l in the December sample TAME was detected during October and November at concentrations as high as 170 gg/l PCE was detected during October an( i November at concentrations of 32 µg/1 and 69 µg/l, respectively,'and TCE was,detected during Iii G November at a concentration of 14 µg/1 ; r j f The laboratory analysis did not detect any other constituents of concern Analytical results of pump- and-treaty influent-water samples (Castle,,Analytical Laboratory Reference Nos 5165, 5218 and McCampbell Analytical'Inc work order nos 0210417, 0211226 and 0212252)'are'summarized in :„ r Table 1, ilaboratbry reports are in Appendix A I 4 ro I 25 EFFLUENT MONITORING RESULTS I� r ' In accordance1with the requirements'of CMPWD'Industnal Wastewater Discharge Permit No 02-1, onthly ground','water pump-and`treat effluent monitoring was performed on 18 October, � � ' a gdvancedI GeoEnwronmental,Inc " I I' I I r;ll