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<br /> x 30+November`2005
<br /> AGE-NC Project No 96-0235 -
<br />' Page-7 of 13,,',,,
<br /> " 'of ;0 O1 hft/ft- Near the former UST No '3 'ekcavati'on ground water 'flow direction at the, "
<br />' shallow-screened data was inferred to be towards the southeast at a gradient of 0 003 f1/ft,"ground "
<br /> 'water flow direction at the intermediate-screened level was inferred to be toward the southeast at a'
<br /> 4 r r t�; I"»- . _.. .:_ -.F!. " , ' i �"�r s• ` ., , — t ...s ' ,. , ' i.+ ,
<br /> 'gradient of 0 007 ft/ft
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<br /> ` 3 2 ANALYTICAL RESULTS"OF MONITORING WELL WATER SAMPLES
<br /> TPH-g was detected, in the`ground water'samples collected from wells MW-1 and MW-2 at ,
<br />' concentrations of 27,000 micrograms per liter (µg/1) and 21,000 �tg/l, respectively :TPH-g was ,s t
<br /> detected in the sample.from 1the newly installed wells EW-I and MW-21 at concentrations of
<br /> '1,400 µg/l andi1;600 µg/1;respectively,during the first sampling event TPH-d also was detected inc
<br /> samples MW-I and MW-2 at concentrations of 20,000 µg/1 and 2,400 pg/l,'respectively
<br /> I r I �
<br /> BTEX compounds were detected in samples MW-1,MW-2,newly installed wells EW-1 and MW-21 '
<br /> at maximum concentrations,of 8,300 µg/l benzene (MW-1), 340 µg/1 toluene (MW-2), 1,700 µg/l
<br /> ethylbenzene;(MW-1) and 2,300 µg/l xylenes (MW-1) BTEX compounds also were detected in s
<br /> samples from the newly installed wells EW-I and MW-21
<br /> MTBE was detected ini the water samples collected from MW-9, MW-10, MW-IIB, MW-12B,
<br />" MW-14B and well EW-1 at concen'trations`of 250 pg/l, 52 µg/l,'44 pg/l, 12 µg/l, 220 pg/l and
<br /> 1 s 120 µg/1, respectively Water samples analyzed from MW-1, MW-2 arid MW-14B contained
<br /> detectable concentrations of 1,2-DCA at 41 µg/l, 10 µg/1 and 37 µg11, respectively TAME , DIPE,
<br /> ETBE, TBA, EDB were not detected aboverlaberatory 'reporting limits in any of the water samples
<br /> collected d4m' 'the,September"or October 2005 monitoririg events'. '
<br />' - The analytical, results of the grab ground water sample collected from,each sampling interval in
<br /> borings off-si , south'and'east of the foniier UST No '3 location had no detectable concentrations
<br /> F ' " of the chemicals of concem,(CP(T-10 through CPT-14, Figures 2) + Y
<br /> Analytical results of water samples collected+during the third and later quarters' of 2005 are '
<br /> summarized in Tables 2'and 3,'analytical results from'previous,monitoring events are summarized : I '
<br />' in Tables 4 and 5 Figures 5'and 6 illustrate the,ground water contamination plumes'm upper and
<br /> lower ground water intervals;respectively Figure 7 n illustrates the cross sectioview of the ground
<br /> water contamination'plumes across the 'former UST No 3 location The laboratory report (CTEL
<br /> ProjectNo'CT214-05091523,0509185,0509193,0509213,6510100,0510120,0510148,0510133
<br />' and 0510158),chain of custody forms and the laboratory quality assurance/quality control(QA/QC)
<br /> reports are,included in Appendix D GeoTracker confirmation pages of the submitted laboratory
<br /> electronic deliverable format (EDF) files are included'in Appendix E `
<br /> Advanced GeoEnvironmental,Inc
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