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07 March 2002 <br /> AGE-NC Pro}ect No 97-0312 <br /> Page 3 of 4 <br /> EPA Method 8250 modified, and In accordance with EPA 1V4ethod <br /> Ic compounds (HVOCs) - <br /> olatlle organ <br /> • Halogenated v <br /> i - <br /> 3,0, FINDINGS the measured depths-to-water from the <br /> subtracting contouring <br /> Ground water elevations were detennlned by act to ground water was <br /> Boris Table 1) Ground water flow direction <br /> ampeterrnlned y <br /> surveyed casing eleva led site plan (Figure <br /> I e 4) Hydros <br /> the water elevatlons on analasis and field observations <br /> quantified by laboratory y , <br /> WATER ELEVATION AND GRADIENT <br /> 3 1 GROUND September 2041 <br /> average 2 32 feet at the site since the Id,varying from <br /> Ground water'elevation increased an generally ea e 3 depicts <br /> onxtonng event Ground water flow direction t f pproxama ely 0 008 feet/feet Figur <br /> m <br /> northeast to southeast,with an average gr <br /> the ground water elevation contours for December 2041 <br /> ANALYTICAL RESULTS OF GROUND WATER SAMPLES <br /> , 2 AN Per liter <br /> sample collected from UST-5 at a concentration <br /> of aticonccent aons of <br /> TpH-g was detected m p les collected from UST-1 le collected from <br /> (µdl) TPH-d was detected II7 same 1,1-dichloroethane <br /> 150 1,respecrively Benzene andtoluetvelerHVOCsancludfng p , In the <br /> .370µg/l and µ 1 and 12µg/1,respectively PCE), were detected <br /> UST-5 at concentrations of 89µ� 1 2 DCE) and tetrachloroethane ( 1 res ectively A <br /> cis 1,2-dlehloroethcne ( , - 1, 0 70 µgjl and 11 µgl , p <br /> {1,1-DCA), DCA, <br /> lglanuaryr200, from the smalldomesticellntai ed 1,1 <br /> small domestic�f well at c�ndc©tratxons ©f 0�4 µ 1 respectively <br /> confirmation sample aollec 1 0 79 µfilland 12 ' <br /> 1;2-DCE and PCE at concentrations of 0 69 µgl , ound water <br /> were detected above laboratory reporting levels inthe <br /> No fuel oxygenated compounds <br /> Lab IDs 87707 through 87714 and 8812Q) <br /> samples collected this quarter The laboratory report end 1 C. 'Analytical results of water samples <br /> - ustod "'forms are Included In App, d on Table 2 The analytical results of all <br /> and chain-°f c y user 2001 are summarize <br /> collected during the fourth z <br /> les'are summanzed on Table 3 <br /> water camp <br /> r' <br /> Advanced Geacumouinenta41nc <br /> i <br /> k <br />