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Mr Terry Tardnti <br /> • July 12, 2005 <br /> Page 4 <br /> TPH-g The only detection of TPH-g was in the sample from MW-3 at 60 µg/L <br /> All other TPH-g concentrations were detected below their respective reporting <br /> limits <br /> MtBE MtBE concentrations were detected in samples from all four monntornng <br /> wells In MW-1, MtBE concentrations increased from 25,000 µg/L in the first <br /> quarter 2005 to 87,000 µg/L flus quarter, a historical high Trace MtBE <br /> concentrations were detected in MW-2 at 0 47 µg/L MtBE concentrations <br /> increased slightly from the first quarter 2005 levels in MW-3 from 25 µg/L to <br /> 47 µg/L and increased in MW-4 from 280 µg/L to 740 �tg/L <br /> Other Oxygenates. In addition to MtBE, other oxygenates were alalyzed <br /> [dnnsopropyl ether (RIPE), ethyl-tertiary-butyl ether (EtBE), tert-amyl methyl ether <br /> (TAME) and tert-butanol] Concentrations of DIPS, TAME and tert-butanol <br /> were detected in MW-1 at 43 µg/L, 72 µg/L and 540 µ%/L, respectively DIPE <br /> and tert-butanol concentrations were detected in MW-4 at 1 4 µg/L and 12 �Ig/L, <br /> respectively These analytes have been routinely detected in these two wells As in <br /> previous reporting, Kiff Analytical applied a "J" flag to the MW-1 and MW-4 tert- <br /> butanol detections due to the low conversion of MtBE to tett-butanol during the <br /> analysis Knff Analytical considers this conversion effect to be mathematically <br /> significant in samples that contain MtBE/tert-butanol in ratios of over 20 1 <br /> The following documents are enclosed with flus letter <br /> Table 1 Historical Groundwater Elevation Data <br /> Table 2 Groundwater Flow Direction and Gradient <br /> Table 3 Historical Groundwater Analytical Data <br /> Figure 1 Site Map <br /> Figure 2 Groundwater Elevation Map,June 2, 2005 <br /> Figure 3 Groundwater Constituent and Benzene Isoconcentration Map, <br /> June 2, 2005 <br /> Figure 4 MtBE Isoconcentranon Map,June 2, 2005 <br /> Attachment A Field Data Sheets <br /> Attachment B Laboratory Analytical Reports <br /> Thrr r-eport wxarpmparrd ru a4zordance unlb the ilandardr ofllr enruonmentahonrulltnh rndrr.lr7 al the time it ndrprrpared It(hould not be <br /> relied upon lry parlter other Mian!hare Jnr whom el war prepared and then onf to the e%tenl of 1/x aope o/utirk whhh udr au1110t11 d Thr <br /> rrporl doer nol gudrantee Thal no addrlronal enrrinnmental mntaminalron burned that dermbed rn 1k,rrporl e%zdt at the rile <br /> P\27000\127960 T&T l rucking GW Morntonng 21)05\Report~\2nd 05ytr doc <br />