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1 <br /> Yearly Average BeFuene and TPH-g Concentrations from MW7 <br /> Year Average benzene concentration(ug/L) Average TPH-G concentration(ug/L) <br />' 1990 ND ND <br /> 1991 <11> <55> <br />' 1992 ND ND <br /> 1993 ND ND <br />' 1994 ND ND <br /> 1995 ND ND <br /> 1996 ND <55> <br /> 1997* ND ND <br /> 1999 ND ND <br />' *Sample results obtained on 12/16/1997 were not included in the average results since those samples were cross <br /> contaminated with submersible pump operation-, <br /> Benzene concentrations have decreased to 7 ug/L in MW-8 located off-site and east of tete site <br /> UST area <br /> Yearly Average Benzene and TPH-g Concentrations from NTW8 <br /> Year Average benzene concentration (ug/L) Average TPH-G concentration(ug/L) <br /> 1990 <8 730> <730> <br /> 1991 <6,700> <6,325> <br /> 1992 <2,545> <7,342> <br /> 1993 <1,020> <5,050> <br /> 1994 <1,760> <7,570> <br /> 1995 <32> <3,325> <br /> 1996 <192> <2,300> <br /> 1997* <907> <1 970> <br /> 1998 <25> <5,070> <br /> *Sample results obtained on 12/16/1997 were not inc lud,.d in the avLr qIL rwulla sMLL those aauiplts were cross <br /> contaminak:d with,uhmersible puriip Opel ationti <br /> 1� <br />