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A M B R I A Ms Vicki McCartney
<br /> April 6,2006
<br /> INVESTIGATION RESULTS
<br /> Soil Analytical Results Soil samples were collected from borings CPT-14 and CPT-15 at depths
<br /> of 20, 30, and 40 fbg and from boning CPT-17 at depths of 20, 30, 41, and 50 fbg No TPHg,
<br /> BTEX, fuel oxygenates, 1,2-DCA, or EDB were detected in any soil sample collected during this
<br /> investigation
<br /> Table 2 summarizes soil analytical data, and Figure 2 presents TPHg, benzene, MTBE, TBA, and
<br /> 1,2-DCA concentrations The laboratory analytical report is included in Attachment D
<br /> Groundwater Analytical Results Groundwater samples were collected from borings CPT-12 (at
<br /> depths of 47, 56, 66, 74, 79, and 87 fbg), CPT-13 (at 53, 60, 77,and 87 fbg), CPT-14 (at 28 fbg),
<br /> CPT-16 (at 25 and 32 fbg), and CPT-17 (at 41, 67, 75, 83, and 90 fbg) As discussed above, no
<br /> groundwater samples could be collected from boring CPT-15 because it did not produce
<br /> sufficient water to collect a sample
<br /> Groundwater samples from boring CPT-12 contained TPHg at 61 ppb (at 74 fbg) and 100 ppb (at
<br /> 87 fbg)/MTBE at 0 82 ppb (at 66 fbg) and 3 3 ppb (at 87 fbg), and TBA at 6 0 ppb (at 87 fbg) `
<br /> For both TPHg detections, the laboratory noted that there was a quantity of unknown
<br /> hydrocarbon(s) in the samples based on gasoline GroundwateAom this boring also contained
<br /> 1,2-DCA at concentrations ranging from 0 77 to 6 7 ppb (from 65 to 87 fbg) No BTEX, DIPS,
<br /> ETRE, TAME, or EDB were detected in CPT-12 1Groundwater from CPT-13 contained 1�V
<br /> 1� v 1,700 ppb TPHg, 69 ppb benzene, 9 5 ppb MTBE, 12 ppb TBA, and 0 80 ppb 1,2-DCA in the �W
<br /> a777-fbg sample f Groundwater from this boring also contained 0 67 ppb MTBE (at 60 fbg) and t
<br /> ra N 2 4 ppb 1,2-DCA (at 87 fbg) No DIPS, ETBE,TAME,or EDB were detected in CPT-13 9�
<br /> The groundwater sample from CPT-14 (at 28 fbg) contained 12 ppb MTBE Nom ;gBTEX,
<br /> fuel oxygenates other than MTBE, 1,2-DCA, or EDB were detected in CPT-14 Groundwater
<br /> samples from boring CPT-16 (at 25 and 32 fbg) contained up to 27,000 ppb TPHg, 3,600 ppb
<br /> benzene, 65 ppb MTBE, 48 ppb TBA, and 2 4 ppb 1,2-DCA No DIPE, ETBE, TAME, or EDB
<br /> were detected ;n CPT-16
<br /> The 90-fbg groundwater sample in boring CPT-l7 contained 14 ppb 1,2-DCA 1,2-DCA was not
<br /> detected in the shallower groundwater samples, and no TPHg, BTEX, fuel oxygenates, or EDB
<br /> were detected in groundwater from this boring
<br /> Table 3 summarizes groundwater analytical data, and Figure 2 presents TPHg, benzene, MTBE,
<br /> TBA, and 1,2-DCA concentrations The laboratory analytical data is included in Attachment D
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