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y I R fl ul �s:_..�3 s oc-��.:c..... _�11 s �to __ 1...- i r• ` ` -. sn h j.»..i uu$' 1�,..n i y,s - .. I I ,., - . _i -„ �M ," I ' 'I 21 December 1999' W' ' I , AGE-NC Project No 98-0426 Page,4 of 6 k ¢I 5 3 2 - ANALYTICAI;'RESULTS OF SOIL SAMPLES ' i Organic vapor was'detected with the PID in borings MW2 and MW3 at concentrations as high as , ` " I . 545 ppm,(MW2 at'20 feet bsg) Organic vapor was not detected in soil samples collected from S I f MW1 PID data is included on the boring logs (Appendix-A) I r f J - �� TPH-g,.ethylbenzene and xylenes were detected in the sample collected from boring MW2-20 at R concentrations of 630 parts per million(ppm, reported as milligrams per kilogram), 3 6 ppm and 13 ,ppm, respectively TPH-g and BTEX compounds werre detected iri samples MW3-20 and MW3-25 r 1 fat concentrations as high as 11 ppm, 0 24 ppm, 0 049 ppm, 0 36 ppm and 0 49 ppm, respectively _ Petroleum hydrocarbons were not detected in sample MW2-25 Analytical results'of soil samples are summarized on Table i The laboratory reports (MAI Sample Nos 23889-23892) and chain-of- E ! " custody forms are included in Appendix B � 3'. 3 GROUND WATER GRADIENT AND FLOW DIRECTIONI � , I The relative elevation of ground water in each well was calculated by subtracting the depth to ground water from the surveyed relative casing elevations (Table 2) Depths to ground water ranged from 22 12 feet to 23 20 feet below the tops of the well casings Relative ground water elevations at the site ranged from 76 90 feet in MW2 to 76 80 in MW1 The ground water gradient was calculated to i' be 0 0033 ft/ft directed N, 15, E- 34 34 ANALYTICAL RESULTS OF WATER SAMPLES TPH-g was�detected in the water samples collected from MW2 and MW3 at concentrations of 1,800 parts per billion'(ppb, reported as micrograms per liter) and 3,100 ppb, respectively Toluene and,,,' r' 1 r xylenes were detected in MW2 at concentrations of 31''ppb and 43 ppb, respectively BTEX' „,,compounds were detected in the water sample from MW3 aticoncentrations of 200 ppb, 12 ppb; 130 ppb and ,1130 ppb, respectively Petroleum hydrocarbons were not detected in the sample collected li f 'from MWl (MTBE was detected in the ground water,sample from MW I_at`a concentration of 1 9 I ';ppb MTBE was not detected in the samples collected from MW2 or MW3 at'a detection limit of I ' 8 ppb ! I I L Analytical results of water samples collected in,October 1+999 are summarized on Table 3, The . laboratoryry'reportr(Alpha Analytical Inc Batch'No A99102704), chain-of-custody form and the I s Advanced GeoEnvironmental,Inc 4 1 { 1