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w - 5 13 February 1998 ,'AGE-NC Project No 95- Page 2 of 5 0121 from each well to fill one-liter 0 5 nil I8%hydrochloric acid as abrebattles and three 40- air bubbles were not m1 EPA-approved V Preservative for the samples Care was OA vials containing were labeled Present in the VOAs after fillip taken to ensure that visible nth the well designation,'date, time g and capping Ground water sample ct,ntazners and sampler's initials 23 LABO , RATORY ANALYSIS OF GROUND WATER Each ground water sample was to SAMPLES trans logged on a chazn-of-custody form SO I SM for total placed rn a chilled container and respective] petroleum hydrocarbons ' for analysis In accordance with EPA Y), in accordance with EP Quantified as gasoline and diesel Tp method benzene and xylene $T A method 8020 for volatile aromatics {benze H-g and TpH_d, Method,9260 for tertiary with methyl-tern ne, toluene, ethyl tert �3' butanal(TBA)} di-iso o buil ether(MTBE),and in accordance with EPA `�Yl methyl ether (TAME P PYl ether(DIFF),ethyl tent bu 8020. The laboratory )' and to confirm and n l ether(ETBE custody report (McCampbell quantify MTBE if detected b )and f° S�e presented in A Analytical Znc Lab I D 83402 to 8341 D) ndA Method Ppendix B, the results of the analysis are contained in chain-of- 3.0• FINDINGS Table 2 3 1 RELATIVE GROUND WATER The depths to ELEVATION AND GRADIENT p ground water from "20 8$feet below the io s wells MuI_I through . water elevation decreased of the well casings gh Mw`9 were measured between 19 02 and an gs Between February though MW-9 duringaverage 1 99 feet at the site I�gb and November 1997 Novernber s The ground water elevation data for MW_ground ground water monitoring event is depicted in Figure 3 During the November 1997 the screened monitoring event, ground water w "drowned", and intervals in monitoring t g wells MW_I between 2 98 and 12 50 feet above saturated zone, , aY not be fi.i11y representative of through MW-g Therefore here fuel hydrocarbons would be expected to hive conditions near the top are 1n`NOVeinber 1997 e the greatest impact p of the (Figure 3 , the gradient was calculated to be 0 006' 06 ft/fI } Ground water mv_nitorin MW-7 suggests that the g data collected in the area ' Ora proximately 32 feet per mile monitorin ground water flow direCtion was toward the northeast;g data collected in the >MW-6 grid floes' direction was tow area of MW-5, MW'6 , ground-water and the east - and MW-9 suggests that the M�'-2, lvlW-4, MW_ , ground water monitorin ground water north 5 and MW-8 suggests that the g data collected in th1rectlone area of �) west Dice to the relatively flat gradient at the ground water now and site, any slight variations in as toward the ground water - ldvarrrd GeoEnvEronmcatai,Inc.