NCD980557656_20110531_NC State University (Lot 86 Farm Unit 1)_FRCBERCLA SAP QAPP_Results of Updated Groundwater Monitoring Based on April - May 2011 Sampling and Analysis Results-OCR

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TO:
FR:
Bruce Stewart, NCSU
Duane Knudson, NCSU
Pete Dressel, Project Manager, Piedmont Geologic
DATE: May 31, 2011
RE: Results of Updated Groundwater Modeling Based on April-May 2011 Groundwater Sampling and
Analysis Results
This memorandum presents results of updated groundwater modeling based on the results of April-May 2011
groundwater sampling and analysis at the North Carolina State University (NCSU) Lot 86 site in Raleigh, North
Carolina. A complete deliverables package for the April-May 2011 groundwater sampling/analysis event has been
provided to NCSU under separate cover.
A site map showing site monitoring well locations is provided in Attachment 1 along with site monitoring well
construction details, tabulated groundwater level data from the April 2011 monitoring well gauging event, and
tabulated results of laboratory analysis of April-May 2011 groundwater samples. April 2011 groundwater levels and
results of laboratory analysis of April-May 2011 groundwater samples were used to update the initial groundwater
graphical models presented in the August I, 2008 project memorandum (Results of Initial Groundwater Modeling).
The updated groundwater modeling was completed using Surfer 8® modeling and contouring software, produced by
Golden Software, Inc. Six new groundwater data sets were incorporated into the site groundwater modeling
directory, described as follows.
• April 2011 groundwater potentiometric surface elevations for shallow, intem1ediate, and deep monitoring
we!~. •
• April-May 2011 groundwater chlorofom1 concentrations in shallow, intennediate, and deep monitoring
wells.
Groundwater potcntiomctric surface contour and flow-vector maps, and groundwater chloroform isoconcentrati_on
contour maps generated through groundwater modeling of the above data sets are provided in Attachment 2. For
comparison, groundwater modeling output based on May 2005 groundwater monitoring data, prior to the September
2006 startup of the site groundwater extraction (GWE) system, is provided in Attachment 3.
May 2005 groundwater potentiometric-surface contour maps based on shallow, intermedi3te, and deep monitoring-
well gauging data show apparent groundwater flow patterns under non-pumping conditions prior to startup of the
GWE system in September 2006. The April 2011 groundwater potentiometric-surface contour map for the shallow
and intermediate aquifer zones are similar to the May 2005 maps but shows deflections of groundwater
potentiomctric-surface contours around the shallow site G WE wells, indicating influence and capture of
groundwater by the shallow GWE wells. The May 2005 and April 2011 potentiometric-surface contour maps for
the deep aquifer are very similar with no notable differences that would indicate significant hydraulic influence in
PIEDMONT GEOLOGIC, P.C.
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Results of Updated Groundwater Modeling
NCSU -Lot 86 Site
May 31,201 I
the deep aquifer from operation of site GWE wells. The similarity in groundwater potentiomctric-surface contours
for the deep aquifer zone in May 2005 and April 2011 is consistent with the cessation of deep GWE well operation
(i.e., GWE wells DRW-A through DRW-D) in June 2008.
Graphs of groundwater chloroform concentrations and potentiometric-surface elevations in site monitoring wells
vcr,sus time are provided in Attachment 4. Following are generalized trends in groundwater chlorofonn
concentrations based on groundwater sampling/analysis events from May 2005 to April-May 201 I. Chloroform has
traditionally been selected for the trend evaluation as the historically most-prevalent contaminant that has generally
been detected at the highest concentrations in site groundwater samples.
Trends in Groundwater Chloroform Concentrations· 2005-201)
Well I.D. Aquifer Zone May 2005 to May 2008 to May 2009 to May 2010 to
May 2008 May 2009 May 2010 · April-May
2011
MW-2• Shallow D I-D NA
MW-3• Shallow D+ I-D D+
MW-6• Shallow I-D+ D NA
MW-8, Shallow D+ I D D-
MW-I IS• Shallow I NA D+* NA
MW-Ill, Intermediate I++ /NE D++/ND ND· ND
MW-12S, Shallow D D+ D I
MW-121• Intem1ediate I I D I
M\V-!2D Deep NA D++ /NE** ND ND
MW-13S Shallow ND ND NA NA
MW-13D Deen ND/NA ND/NA ND ND*** /NE
MW-14 Shallow ND/NA ND ND ND
MW-15 Shallow NA NA NA NA
MW-!6S, Shallow D I D+ I
MW-161, Intermediate !++ D++ D+ ]+
MW-16D, Deen NA D+ /NE** ND ND
MW-17S, Shallow D+ D+ D+/NE NA
MW-171• Intem1ediate I !+ D+ I
MW-17D• Deep NA I+** D D
MW-27, Shallow DINE DINE I /NE DINE
MW-34D Deen NA D+ IND** ND ND
MW-35S· Shallow ND I/NE ND ND
MW-35D, Deep I++/ NE I /NE DINE DINE
MW-36S • Shallow I D++ D++ ]+
MW-36D• Deen I++ I D D
MW-37 • Shallow I I+ D+ I+
MW-38 Shallow ND ND ND ND
MW-40, Shallow D++ I++ D++/NE D+/NE
MW-41S Shallow ND ND ND ND
MW-4ll Intermediate ND !+/NE ND ND*** /NE
MW-41D, Deep !+/NE I/NE DINE 'DI/NE
MW-42S Shallow ND ND ND ND*** /NE
MW-421 • Intermediate !++/NE D++/NE !++/NE I/NE
(contmued)
PIEIJMONTGEOLOGIC. P.C 2
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Results of Updated Groundwater Modeling
NCSU -Lot 86 Site
May31,2011
Trends in Groundwater Chloroform Concentrations: 2005-2011 (continued\
Well I.D. Aquifer Zone May 2005 to May 2008 to May 2009 to
May 2008 May 2009 May 2010
MW-43S. Shallow DINE 1-/NE DINE
MW-43D-Deep D+INE I++ /NE DINE
MW-45• Shallow l+/NE !+/NE D+INE
MW-46 Shallow ND ND ND
MW-47• Deep NA I+/NE** I /NE
• Companson 1s based on May 2008 and May 2010 chloroform concentrat10ns.
** Comparison is based on May 2005 and May 2009 chloroform concentrations.
May 2010 to
April-May
2011
I+INE
1-INE
NA
ND
I/NE
••• Chloroform was detected in April-May 2011 sample, but reported concentration was less than detection limit for
May 20 IO sample.
I-= Increasing, but by less than 10%.
I = Increasing by more than I 0%, but less than 2X.
I+ = Increasing by more than 2X.
I++ = Increasing by more than I OX.
ND= Not detected.
D-= Decreasing, but by less than I 0%.
D = Decreasing by more than I 0% but less than half.
D+ = Decreasing by more than half.
D++ = Decreasing by more than 90%.
NA= No data available for one of the events.
NE = Concentration does not exceed NC groundwater standard.
Detected groundwater chloroform co!'lcentrations increased in 12 site monitoring wells between May 2010 to April-
May 2011. Of these 12 wells, consisting of five shallow, four intermediate; and three deep monitoring wells,
groundwater chloroform concentrations remain less than the North Carolina groundwater standard (70 ug/L) in five
wells (one shallow, one intermediate, and three deep).
Overall trends in groundwater chemical of concern (COC) concentrations since 2002 are divided into the following
generalized categories.
Generalized Trends in Groundwater COC Concentrations· 2002 to 2011 .
Decreasing Flat or }?lat or Increasing li'luctuating
Slightly Slightly (no domiilant
Decreasing Increasi112: overall trend\
MW-2 MW-8 MW-121 MW-171 MW-161
MW-3 MW-17D MW-35D MW-35S
MW-6 MW-37 MW-421 MW-36D
MW-I I MW-43D MW-40
MW-Ill MW-45 MW-41D
MW-12 MW-47 MW-43S
MW-16
MW-16D
MW-17
MW-27
MW-36S
With the exception of monitoring-well MW-171, the wells listed above as showing increasing trends in groundwater
COC concentrations have exhibited relatively low groundwater COC concentrations (e.g., less than the North
Carolina groundwater standard for chloroform) relative to other site monitoring wells.
A comparison of May 2005 and April-May 2011 groundwater chloroform isoconcentration contour maps indicates
some shrinkage of the lateral extent of the groundwater chlorofonn distribution in the shallow aquifer zone,
PIEDMONT GEOLOGIC, l'.C. 3
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Results of Updated Groundwater Modeling
NCSU -Lot 86 Site
May 31, 2011
particularly in the northern and southwest portions. Comparison of May 2005 and April-May 2011 maps for the
intermediate aquifer zone indicates no substantial change in the groundwater chloroform distribution over time.
Comparison of 2005 to 2011 maps for the deep aquifer zone indicates some expansion of the lateral extent of the
groundwater chloroform distribution over time in the northeast and southeast directions. However, no hard data
exists to support the northeast expansion of the plume indicated by the 2011 modeling results.
PIEDMONT GEOLOGIC, P.C. 4
I Results of Updated Groundwater Modeling
NCSU -Lot 86 Site
I May 27, 2011
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I ATTACIIMENT 1
I FIGURES/TABLES
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I PIEDMONT GEOLOGIC, P.C.
----
0MW43D
MW430
LEGEND
MW33 0 Monitoring Well
D Waste Burial Area
(Source Area)
Fenced Area
.___, Edge of Wooded Area
--
MW46 ..
--
MW45 ..
·:::.·.·::.·:::::::::::.·.·,.·:::::::.·.·::::.·,.·:::::::
- -- -.. --
flll(llf ~~(\W32
M"_!i4Do/
MW,l7A MW34SR~/
MW27 _,--;::,::::,/'
~( ~w•=•
MW29 0 \ system bldg,
\ \
NCSU Practice
Football Fields
Scale (ft.)
0 120' 240'
PIEDMONT GEOLOGIC, P.C.
Environmental Consultants
re.ll'Ul( a e: " 6/9/10 Fi 1.dw
Site Map
TOJ.C O.:
North Carolina State University 1020
Lot 86
PD Ralei h, North Carolina
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TABLE 1
GROUNDWATER MONITORING WELL CONSTRUCTION DETAILS
North Carolina State University
Lot 86 Site
Raleigh, North Carolina
Well I.D. Northing Easting Well Class J'op ofCasin Ground Screen Elevation (2
(1) Elevation (2) Elev. (2) Too Bottom
MW-I 747,972.81 2,083,713.47 s 439.30 437.73 400.53 395.53
MW-IA 747,968.37 2,083,717.18 s 438.92 438.05 397.35 392.35
MW-IB 747,972.08 2,083,718.51 s 438.25 437.93 387.43 382.43
MW-2 747,934.50 2,083,791.44 s 448.74 446.00 401.23 396.23
MW-3 747,831.30 2,083,724.81 s 445.39 443.58 411.18 406.18
MW-3A 747,833.58 2,083,714.96 S-1 443.15 441.89 381.89 . 379.89
MW-3B 747,829.10 2,083,716.16 S-1 443.66 442.02 371.02 369.02
MW-4 747,738.38 2,083,847.26 s 454.32 452.54 405.54 400.54
MW-5 747,911.73 2,083,684.29 s 441.26 439.53 400.53 395.53
MW-SA 747,917.11 2,083,685.48 s 439.81 439.38 393.38 388.38
MW-5B 747,913.31 2,083,688.75 S-1 440.13 439.72 383.72 378.72
MW-6 747,987.81 2,083,695.81 s 438.61 436.36 402.86 397.86
MW-7 747,972.40 2,083,759.49 s 441.94 440.09 401.29 396.29
MW-8 747,936.68 2,083,831.30 s 447.85 445.91 397.91 392.91
MW-9 747,984.18 2,083,569.82 s 442.52 ND 442.52 ND
MW-10 748,035.32 2,083,584. I 6 s 438.09 ND 438.09 ND
MW-II 747,987.24 2,083,904.54 s 430.01 429.56 405.56 400.56
MW-111 747,982.67 2,083,914.92 I 434.29 431.20 373.60 363.60
MW-12 748,035.37 2,083,726.83 s 427.24 426.18 397.18 392.18
MW-121 748,031.08 2,083,738.92 I 430.70 427.45 359.75 354.75
MW-12D 748,048.21 2,083,735.45 D 427.45 427.95 331.0 321.0
MW-13 748,099.25 2,083,498.80 s 423.82 423.73 394.73 389.73
MW-13D 748,122.47 2,083,503.49 D 423.43 423.93 333.9 323.9
MW-14 747,148.54 2,084,091.12 s 451.87 450.38 413.38 408.38
MW-15 748,078.43 2,083,447.10 s 432.38 431.67 397.67 392.67
MW-16 748.009.06 2,083,822.21 s 427.94 427.61 399.61 394.61
MW-161 748,004.62 2,083,832.41 I 432.14 429.23 374.73 364.73
MW-16D 748,024.15 2,083,819.82 D 428.98 429.48 349.5 339.5
MW-17 748,068.64 2,083,615.41 s 425.09 424.02 398.02 393.02
MW-171 748,062.71 2,083,626.56 I 427.74 424.96 371.76 361.76
MW-17D 748,087.86 2,083,612.19 D 425.44 425.94 330.9 320.9
MW-27 747,678.44 2,083,751.29 s 448.26 447.22 407.22 402.22
MW-27A 747,687.36 2,083,749.28 s 448.55 447.40 392.90 388.90
MW-29 747,565.34 2,083,753.75 s 447.67 446.01 395.51 390.51
MW-30 747,579.80 2,084,072.68 s 440.86 438.17 399.17 389.17
MW-31 747,564.14 2,084,073.85 s 440.72 438.15 396.15 386.15
MW-32 747,760.44 2,084,186.72 s 438.15 436.21 411.41 401.41
MW-33 747,760.99 2,084,157.91 I 441.38 438.42 378.42 368.42
MW-34SR 747,694.98 2,083,926.43 s 454.82 452.32 424.3 404:3
MW-34Dl 747,702.24 2,083,936.61 D 454.71 452.21 361.2 351.2
MW-35S 747,989.14 2,083,565.0 I s 443.12 441.57 401.57 391.57
MW-35D 747,991.91 2,083,552.20 D 444.69 441.99 304.99 294.99
PIEDMONT GEOLOGIC, P.C. Page 1 of2
Screen Depth (3)
Top Bottom
37.2 42.2
40.7 45.7
50.5 55.5
44.8 49.8
32.4 37.4
60.0 62.0
71.0 73.0
47.0 52.0
39.0 44.0
46.0 51.0
56.0 61.0
33.5 38.5
38.8 43.8
48.0 53.0
ND ND
ND ND
24.0 29.0
57.6 67.6
29.0 34.0
67.7 72.7
97.0 107.0
29.0 34.0
90.0 100.0
37.0 42.0
34.0 39.0
28.0 33.0
54.5 64.5
80.0 90.0
26.0 31.0
53.2 63.2
95.0 105.0
40.0 45.0
54.5 58.5
50.5 55.5
39.0 49.0
42.0 52.0
24.8 34.8
60.0 70.0
28.0 48.0
91.0 101 .0
40.0 50.0
137.0 147.0
g
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TABLE I (continued)
GROUNDWATER MONITORING WELL CONSTRUCTION DETAILS
North Carolina State University
Lot 86 Site
Raleigh, North Carolina
Well l.D. Northing Easting Well Class rfop of Casio Ground Screen Elevation (2
(I) Elevation (2) Elev. (2) Top
MW-36S 747,905.86 2,083,672.19 s 442.71 439.64 399.64
MW-36D 747,898.07 2,083,671.54 D 442.87 439.75 335.45
MW-37 747,964.33 2,083,718.54 s 440.88 438.70 398.70
MW-38 747,959.35 2,083,794.05 D 445.38 442.47 345.37
MW-40 747,908.53 2,084,062.93 s 435.47 432.87 405.07
MW-41 748,239.12 2,083,608.18 s 421.17 421.30 396.90
MW-41! 748,235.91 2,083,6 I 9.56 I 421.57 421.47 370.97
MW-410 748,278.60 2,083,583.47 D 420.67 421.17 341.2
MW-42 748,149.51 2,083,907.73 s 427.25 427.18 401.98
MW-42! 748,155.61 2,083,896.58 I 426.68 426.76 376.76
MW-43 748,526.66 2,083,396.75 s 440.59 438.74 385.44
MW-43D 748,532.52 2,083,416.56 D 438.01 435.50 339.5
MW-45 748,342.75 2,083,907.91 s 447.50 445.21 392.01
MW-46 748,444.92 2,083,683.30 s 451.35 449.42 396.22
MW-47 747,787.80 2,083,636.72 D 441.11 441.61 336.6
(I) S = shallow wells with screen mtervals in the elevation range from 382-413 ft;
I= intermediate-depth wells with screen intervals in the elevation range from 355-377 ft;
D = deep wells with screen intervals in the elevation range from 295-360 ft in bedrock.
(2) Measured in feet relative to National Vertical Datum (NGVD) of 1929.
(3) Measured in feet below ground surface.
ND = No data currently available.
PIEDMONT GEOLOGIC, P.C. Page 2 of2
Bottom
389.64
325.45
388.70
335.37
395.07
386.90
360.97
331.2
391.98
366.76
375.44
329.5
382.01
386.22
321.6
Screen Deoth (3)
Top Bottom
40.0 50.0
104.3 114.3
40.0 50.0
97.1 107.1
27.8 37.8
24.4 34.4
50.5 60.5
80.0 90.0
25.2 35.2
50.0 60.0
53.3 63.3
96.0 106.0
53.2 63.2
53.2 63.2
105.0 120.0
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Well I.D.
MW-r
MW-IA
MW-IB
MW-2
MW-3
MW-3A
MW-3B
MW-5
MW-SA
MW-5B
MW-6
MW-7
MW-8
MW-9
MW-10
MW-I I
MW-111
MW-12
MW-121
MW-12D
MW-13
MW-13D
MW-14
MW-15
MW-16
MW-161
MW-16D
MW-17
MW-171
MW-17D
MW-27
MW-27A
MW-29
MW-32
MW-33
MW-34SR
MW-34DI
MW-35S
MW-35D
Northing
747,972.81
747,968.37
747,972.08
747,934.50
747,831.30
747,833.58
747,829.10
747,911.73
747,917.11
747,913.31
747,987.81
747,972.40
747,936.68
747,984.18
748,035.32
747,987.24
747,982.67
748,035.37
748,031.08
748,048.21
748,099.25
748,122.47
747,148.54
748,078.43
748,009.06
748,004.62
748,024.15
748,068.64
748,062.71
748,087.86
747,678.44
747,687.36
747,565.34
747,760.44
747,760.99
747,694.98
747,702.24
747,989.14
747,991.91
TABLE2
GROUNDWATER LEVEL DATA
APRIL 25, 2011
North Carolina State University
Lot 86 Site
. Raleigh, North Carolina
Easting Well Class Top of Casing Depth to Ground Groundwater
Elevation (ft)(! water (ft)(2) Elevation (ft)(!)
2,083,713.47 shallow 439.30 DRY NA
2,083,717.18 shallow 438.92 43.64 395.28
2,083,718.51 shallow· 438.25 43.07 395.18
2,083,791.44 shallow 448.74 DRY NA
2,083,724.81 shallow 445.39 47.43 397.96
2,083,714.96 shallow 443.15 45.49 397.66
2,083,716.16 intermediate 443.66 44.12 399.54
2,083,684.29 . shallow 441.26 DRY NA
2,083,685.48 shallow 439.8 I 44.04 395.77
2,083,688.75 intermediate 440.13 44.35 395.78
2,083,695.81 shallow 438.61 DRY NA
2,083,759.49 shallow 441.94 DRY NA
2,083,831.30 shallow 447.85 49.67 398.18
2,083,569.82 shallow 442.52 DRY NA
2,083,584.16 shallow 438.09 DRY NA
2,083,904.54 shallow 430.01 DRY NA
2,083,914.92 intermediate 434.29 34.61 399.68
2,083,726.83 shallow 427.24 32.75 394.49
2,083,738.92 intermediate 430.70 35.03 395.67
2,083,735.45 deen 427.45 29.87 397.58
2,083,498.80 shallow 423.82 DRY NA
2,083,503.49 deco 423.43 31.82 391.61
2,084,091.12 shallow 451.87 37.97 413.90
2,083,447.10 shallow 432.38 DRY NA
2,083,822.21 shallow 427.94 30.87 397.07
2,083,832.41 intermediate 432.14 36.00 396.14
2,083,819.82 deco 428.98 31.31 397.67
2,083,615.41 shallow 425.09 DRY NA
2,083,626.56 intermediate 427.74 .34.74 393.00
2,083,612.19 deen 425.44 32.54 392.90
2,083,751.29 shallow 448.26 45.04 403.22
2,083,749.28 shallow 448.55 45.41 403.14
2,083,753.75 shallow 447.67 45.54 402.13
2,084,186.72 shallow 438.15 33.21 404.94
2,084,157.91 intennediate 441.38 36.11 405.27
2,083,926.43 shallow 454.82 46.11 408.71
2,083,936.61 deep 454.71 45.14 409.57
2,083,565.01 shallow 443.12 49.61 393.51
2,083,552.20 deen 444.69 50.97 393.72
( continued)
Page I of2
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TABLE 2 (continued)
GROUNDWATER LEVEL DATA
APRIL 25, 20 II
North Carolina State University
Lot 86 Site
Raleigh, North Carolina
Well l.D. Northing Easting Well Class Top of Casing
Elevation (ft)(I
MW-36S 747,905.86 2,083,672.19 shallow 442.71
MW-36D 747,898.07 2,083,671.54 deeo 442.87
MW-37 747,964.33 2,083,718.54 shallow 440.88
MW-38 747,959.35 2,083,794.05 deep 445.38
MW-40 747,908.53 2,084,062.93 shallow 435.47
MW-41 748,239.12 2,083,608.18 shallow 421.l 7
· MW-411 748,235.91 2,083,619.56 intermediate 421.57
MW-41D 748,278.60 2,083,583.47 deep 420.67
MW-42 748,149.51 2,083,907.73 shallow 427.25
MW-421 748,155.61 2,083,896.58 intermediate 426.68
MW-43 748,526.66 2,083,396.75 shallow 440.59
MW-43D 748,532.52 2,083,416.56 deeo 438.01
MW-45 748,342.75 2,083,907.91 shallow 447.50
MW-46 748,444.92 2,083,683.30 shallow 451.35
MW-47 747,787.80 2,083,636.72 deep 441.11
-( 1) Measured m feet relative to site datum.
(2) Measured relative to top-of-casing reference point.
NA= Not Applicable
Depth to Ground
water (ft)(2)
46.85
46.89
45.59
47.25
30.55
29.22
29.21
28.52
29.05
28.52
52.14
51.60
NM
59.77
44.46
Groundwater
Elevation (ft)(I)
395.86
395.98
395.29
398.13
404.92
391.95
392.36
392.15
398.20
398. 16
388.45
386.41
NM
391.58
396.65
NM= Depth to groundwater not measured due to well being inaccessible as a result of casing damage.
Page 2 of2
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TABLE3
SUMMARIZED RESULTS OF LABORATORY ANALYSIS
VOLATILE ORGANIC COMPOUNDS
GROUNDWATER SAMPLES COLLECTED APRIL-MAY 2011
North Carolina State University
Lot 86 Site
Raleigh, North Carolina
Sample I.D.: MW-3 MW-8 MW-111 MW-12S MW-121 MW-12D
Samnle Date: 5/3/11 5/3/11 4/28/11 5/3/11 5/2/11 4/27/11
EPA Method 6200 (µg/L)
Benzene ~J 'jl'. <12.5 0.73 ~11'220"' "'"'li175•'il\ ~ ' •-:::, ,~?.,j • ;,:,,_ ' <0.50
Bromobenzene <0.50 <12.5 <0.50 28.4 <25.0 <0.50
Bromodichloromethane <0.50 <12.5 <0.50 i~3112~s <25.0 <0.50
Carbon tetrachloride :@;';}190)"k' i\1),/8.8!8(,i <0.50 ~f524~l:, ~~48[3£¾: <0.50
Chlorobenzene <0.50 <12.5 <0.50 r;¾f.i~7/b.! <25.0 <0.50
Chloroform !!l!l' 3 !1'7 0 ~; ~2163:ow <0.50 hr21\9.00l.l il612-~0l';l <0.50
1,2-Dibromo-3-chloronrooane <1.0 <25.0 <1.0 1'l/9;180Ki <50.0 <1.0
1,2-Dibromoethane (EDBl ~1:4231:l\t !'.'.!ij19l5\illr <0.50 t."10i800F <25.0 <0.50
1,2-Dichlorobenzene <0.50 <12.5 <0.50 <25.0 <25.0 <0.50
Dichlorodifluoromethane <0.50 <12.5 <0.50 <25.0 <25.0 <0.50
I, 1-Dichloroethane <0.50 <12.5 <0.50 <25.0 <25.0 <0.50
1,2-Dichloroethane '!:~23!81.it <12.5 <0.50 Wf;;: t •7r7f~'J; <25.0 <0.50
I, 1-Dichloroethene <0.50 <12.5 <0.50 · <25.0 <25.0 <0.50
cis-1,2-Dichloroethene <0.50 <12.5 <0.50 <25.0 <25.0 <0.50
1,2-Dichloroorooane li1:1;2ooti ~,1;191~; <0.50 ~29·;4oot'. (fJl87f4''.!! <0.50
1,3-Dichloronronane <0.50 <12.5 <0.50 266 <25.0 <0.50
Di-isoorooyl ether (IPE) <0.50 <12.5 <0.50 <25.0 <25.0 <0.50
Ethyl benzene <0.50 <12.5 <0.50 118 <25.0 <0.50
Methvlene chloride !i\11)88f64f1 <50.0 <2.0 ~;1;,✓2~·23_-o)}I <100 <2.0
I, 1,2,2-Tetrachloroethane <0.50 <12.5 <0.50 <25.0 <25.0 <0.50
Tetrachloroethene ~dt'6?4¾~. :~45!slY <0.50 ifiii2l3~l Litl:t'0'.4i1$£ <0.50
Toluene <0.50 <12.5 <0.50 ~{.l\230~;; <25.0 <0.50
1, 1,2-Trichloroethane <0.50 <12.5 <0.50 2,260 50.2 <0.50
Trichlorocthcne h~328_\tf~ l'!liil9!<t!'li <0.50 :/tf',488(}t 1:::17.7:0.'"i'] <0.50
1,2 ,3-T richloropropane <0.50 <12.5 <0.50 <25.0 <25.0 <0.50
1,2,4-Trimethylbenzenc <0.50 <12.5 <0.50 44.1 <25.0 <0.50
Vinvl chloride <1.0 <25.0 <1.0 <50.0 <50.0 <1.0
m,n-Xvlenes <1.0 <25.0 <1.0 191 <50.0 <1.0
o-xylenes <0.50 <0.50 167 <25.0 <0.50
PIEDMONT CHO LOGIC. P.C. Page I of5
MW-13D MW-14
4/27/11 4/26/11
<0.50 <0.50
<0.50 <0.50
<0.50 <0.50
<0.50 <0.50
<0.50 <0.50
0.65 <0.50
<1.0 <1.0
<0.50 <0.50
<0.50 <0.50
<0.50 <0.50
<0.50 <0.50
<0.50 <0.50
<0.50 <0.50
<0.50 <0.50
<0.50 <0.50
<0.50 <0.50
<0.50 <0.50
<0.50 <0.50
<2.0 <2.0
<0.50 <0.50
<0.50 <0.50
<0.50 <0.50
<0.50 <0.50
<0.50 <0.50
<0.50 <0.50
<0.50 <0.50
<1.0 <1.0
<1.0 <1.0
<0.50 <0.50
0
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TABLE 3 (continued)
SUMMARIZED RESULTS OF LABORATORY ANALYSIS
VOLATILE ORGANIC COMPOUNDS
GROUNDWATER SAMPLES COLLECTED APRIL-MAY 2011
North Carolina State University
Lot 86 Site
Ralei~h, North Carolina
Sample J.D.: MW-16S MW-161 MW-16D MW-171 MW-17D MW-27 MW-34DI MW-35S
Sanmle Date:
EPA Method 6200 (µg/L)
Benzene
Bromobenzcne
Bromodichloromethane
Carbon tetrachloride
Chlorobcnzene
Chloroform
1,2-Dibromo-3-chloronronane
1,2-Dibromoethane (EDB)
1,2-Dichlorobenzene
Dichlorodifluoromethane
I, 1-Dichlorocthane
1,2-Dichloroethane
I, 1-Dichloroethene
cis-1,2-Dichloroethene
1,2-Dichloronronanc
1,3-Dichloroorooane
Di-isonrom•l ether (IPE)
Ethyl benzene
Methvlenc chloride
I, 1,2,2-Tetrachloroethane
Tetrachloroelhene
Toluene
I, 1,2-Trichloroethane
Trichlorocthcne
1,2,3-Trichloropropane
1,2,4-Trimethylbenzene
Vinvl chloride
m,n-Xvlenes
o-xvlenes
l'IEDMONTGEOl,OGIC, P.C.
5/3/II 4/29/II 4/28/ll
<0.50
<0.50 <0.50 <0.50
<0.50 <0.50 <0.50
<0.50
23.2 1.3 <0.50
<0.50
<1.0 <1.0 <1.0
<0.50
6.6 <0.50 <0.50
<0.50 <0.50 <0.50
1.0 <0.50 <0.50
<0.50
4.3 <0.50 <0.50
0.65 <0.50 <0.50
<0.50
2.2 0.55 <0.50
0.50 1.6 <0.50
1.3 <0.50 <0.50
<2.0
<0.50 <0.50 <0.50
<0.50
11.5 <0.50 <0.50
767 19.0 <0.50
<0.50
<0.50 <0.50 <0.50
0.97 0.76 <0.50
<1.0 <1.0
5.4 <1.0 <l.0
4.8 0.85 <0.50
Page 2 of5
4/29/ll 5/2/ll 5/3/II 4/26/II 4/27/ll
<0.50 <0.50
<5.0 <0.50 <0.50 <0.50 <0.50
<0.50 <0.50
<0.50 <0.50
<5.0 <0.50 <0.50 <0.50 <0.50
<0.50 <0.50
<1.0 <1.0
<0.50 <0.50
<5.0 <0.50 <0.50 <0.50 <0.50
<5.0 0.56 <0.50 <0.50 <0.50
<5.0 0.90 <0.50 <0.50 <0.50
<0.50 <0.50 <0.50
<5.0 0.59 <0.50 <0.50 <0.50
<5.0 <0.50 <0.50 <0.50 <0.50
<0.50 <0.50
<5.0 <0.50 <0.50 <0.50 <0.50
<5.0 <0.50 <0.50 <0.50 <0.50
<5.0 <0.50 <0.50 <0.50 <0.50
<20.0 <2.0 <2.0 <2.0 <2.0
<5.0 !lil\0Y6~~ <0.50 <0.50 <0.50
<0.50 <0.50
<5.0 <0.50 <0.50 <0.50 <0.50
10.4 29.5 <0.50 <0.50 <0.50
2.9 <0.50 <0.50
<0.50 <0.50 <0.50
<5.0 <0.50 <0.50 <0.50 <0.50
<10.0 <1.0 <l.0 <l.0 <1.0
<10.0 <1.0 <1.0 <1.0 <l.0
<5.0 <0.50 <0.50 <0.50 <0.50
0
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TABLE 3 (continued)
SUMMARIZED RESULTS OF LABORATORY ANALYSIS
VOLATILE ORGANIC COMPOUNDS
GROUNDWATER SAMPLES COLLECTED APRIL-MAY 2011
North Carolina State University
Lot 86 Site
Raleieh, North Carolina
Sample I.D.: MW-35D MW-36S MW-36D MW-36D MW-37 MW-38
(1)
Samole Date: 4/28111 512111 4129111 4129111 512111 4127111
EPA Method 6200 (µg/L)
Benzene <0.50 lfiif.1si~ l)j~''Fs'fi " ' . ~,,., ri.z:1r1ttfif ~-, ....... -"'~}" 1:116;000 , <0.50
Bromobenzenc <0.50 <25.0 <5.0 <2.5 <500 <0.50
Bromodichloromethane <0.50 i_ViYSH7iJJ <5.0 <2.5 <500 <0.50
Carbon tetrachloride :i::ll!f3!8l'l'1: i~L72~ L~E3}3}~ &.:j1 "4 r 3 \tt <500 <0.50
Chlorobenzcne <0.50 <25.0 <5.0 <2.5 <500 <0.50
Chloroform 27.9 ?¾lntt,1.olt/ r,'Jt'l915J~ ~~~0·9.~ Nlil;0O:0.i <0.50
1,2-Dibromo-3-chloropropane <1.0 <50.0 <10.0 <5.0 <1,000 <1.0
1,2-Dibromoethane (EDB) <0.50 ~':!'s22R~ <5.0 <2.5 <500 <0.50
1,2-Dichlorobcnzcne <0.50 <25.0 <5.0 <2.5 <500 <0.50
Dichlorodifluoromethane <0.50 <25.0 <5.0 <2.5 <500 <0.50
I, 1-Dichloroethanc <0.50 <25.0 <5.0 <2.5 <500 <0.50
1,2-Dichlorocthane <0.50 ri~'"/4 0 9 }~ <5.0 ~!{315;~ !~l2f210~ <0.50
I, 1-Dichloroethene <0.50 <25.0 <5.0 <2.5 <500 <0.50
cis-1,2-Dichloroethene <0.50 <25.0 <5.0 <2.5 <500 <0.50
1,2-Dichloronronane <0.50 · t:~:l903'!i!!! !)03if!S~ i1iJ~H5.~ L~2\~7,o* <0.50
1,3-Dichloropronane <0.50 <25.0 <5.0 <2.5 <500 <0.50
Di-isooronyl ether (]PE) <0.50 <25.0 <5.0 <2.5 <500 <0.50
Eth vi benzene <0.50 <25.0 <5.0 <2.5 <500 <0.50
Methylene chloride <2.0 Ki413f~ <20.0 <10.0 ~:23_~s·o_o_t <2.0
I, 1,2,2-Tetrachlorocthane <0.50 <25.0 <5.0 <2.5 <500 <0.50
Tetrachlorocthene <0.50 i;;::,26'.S\C;{ <5.0 ~J:l~:t:s~W <500 <0.50
Toluene <0.50 <25.0 <5.0 <2.5 t.~h2so~ <0.50
I, 1,2-Trichloroethane <0.50 <25.0 <5.0 <2.5 <500 <0.50
Trichloroethene ~~0}73.i'ii~ bf3_0Ab.'t! !~9,2r-'.l! ~!9!5\~* i!~;1;S60J1~Ii <0.50
1,2,3-Trichloropropane <0.50 <25.0 <5.0 <2.5 <500 <0.50
1,2,4-Trimethylbenzene <0.50 <25.0 <5.0 <2.5 <500 <0.50
Vinyl chloride <1.0 <50.0 <10.0 <5.0 <1,000 <1.0
m,o-Xvlenes <1.0 <50.0 <10.0 <5.0 <1,000 <1.0
o-xvlenes <0.50 <25.0 <5.0 <2.5 <500 <0.50
PIEDMONT GEOLOGIC, P.C. Page 3 or5
MW-40 MW-41S
4127111 4128111
<0.50 <0.50
<0.50 <0.50
<0.50 <0.50
<0.50 <0.50
<0.50 <0.50
3.8 <0.50
<1.0 <1.0
<0.50 <0.50
<0.50 <0.50
<0.50 <0.50
<0.50 <0.50
<0.50 <0.50
<0.50 <0.50
<0.50 <0.50
<0.50 <0.50
<0.50 <0.50
<0.50 <0.50
<0.50 <0.50
<2.0 <2.0
<0.50 <0.50
<0.50 <0.50
<0.50 <0.50
<0.50 <0.50
<0.50 <0.50
<0.50 <0.50
<0.50 <0.50
<1.0 <1.0
<1.0. <1.0
<0.50 <0.50
.
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TABLE 3 (continued)
SUMMARIZED RESULTS OF LABORATORY ANALYSIS
VOLATILE ORGANIC COMPOUNDS
GROUNDWATER SAMPLES COLLECTED APIUL-MA Y 201 I
North Carolina State University
Lot 86 Sile
Ralei2h, North Carolina
Sample I.D.: MW-411 MW-41D MW-42 MW-42 MW-421 MW-43S
(2)
Sample Date: 4/27/11 4/29/11 4/28/1 I 4/28/11 4/29/11 4/28/11
EPA Method 6200 (11g/L)
Benzene <0.50 <0.50 <0.50 <0.50 i~~ii: <0.50
Bromobcnzene <0.50 <0.50 <0:50 <0.50 <0.50 <0.50
Bromodichloromethane <0.50 <0.50 <0.50 <0.50 <0.50 <0.50
Carbon tetrachloride <0.50 5.7 <0.50 <0.50 <0.50 <0.50
Chlorobcnzcnc <0.50 <0.50 <0.50 <0.50 <0.50 <0.50
Chloroform 1.2 26.3 0.66 0.66 26.4 11.5
1,2-Dibromo-3-chloronronane <1.0 <1.0 <1.0 <1.0 <1.0 <1.0
1,2-Dibromoethane (EDB) <0.50 }.1?;{0!59~~ <0.50 <0.50 <0.50 <0.50
I ,2-Dichlorobenzene <0.50 <0.50 <0.50 <0.50 <0.50 <0.50
Dichlorodifluoromethanc <0.50 <0.50 <0.50 <0.50 <0.50 <0.50
1, 1-Dichloroethanc <0.50 <0.50 <0.50 <0.50 <0.50 <0.50
1,2-Dichlorocthane <0.50 <0.50 <0.50 <0.50 <0.50 <0.50
l, 1-Dichloroethenc <0.50 <0.50 <0.50 <0.50 <0.50 <0.50
cis-1,2-Dichloroethenc <0.50 <0.50 <0.50 <0.50 <0.50 <0.50
1,2-Dichloropropane <0.50 t:iii\'6£8tl\'i <0.50 <0.50 L'\fl'.4lJti'.l;: <0.50
1,3-Dichloropropane <0.50 <0.50 <0.50 <0.50 <0.50 <0.50
Di-isoorooyl ether (IPE) <0.50 <0.50 <0.50 <0.50 <0.50 <0.50.
Ethyl benzene <0.50 <0.50 <0.50 <0.50 <0.50 <0.50
Methylene chloride <2.0 <2.0 <2.0 <2.0 <2.0 <2.0
1, 1,2,2-Tetrachloroethane <0.50 <0.50 <0.50 <0.50 <0.50 <0.50
Tetrachloroethenc <0.50 0.66 <0.50 <0.50 <0.50 <0.50
Toluene <0.50 <0.50 <0.50 <0.50 <0.50 <0.50
l, 1,2-Trichloroethane <0.50 <0.50 <0.50 <0.50 <0.50 <0.50
Trichlorocthene <0.50 1.2 <0.50 <0.50 <0.50 <0.50
1,2,3-Trichloroorooane <0.50 <0.50 <0.50 <0.50 <0.50 <0.50
1,2,4-Trimethylbenzcne <0.50 <0.50 <0.50 <0.50 <0.50 <0.50
Vinvl chloride <1.0 <1.0 <1.0 <1.0 <1.0 <1.0
m,o-Xvlenes <1.0 <1.0 <1.0 <1.0 <1.0 <1.0
o-xvlenes <0.50 <0.50 <0.50 <0.50 <0.50 <0.50
PIEDMONT GEOLOGIC. l'.C. Page 4 of 5
MW-43D MW-46
4/28/11 4/29/11
<0.50 <0.50
<0.50 <0.50
<0.50 <0.50
<0.50 <0.50
<0.50 <0.50
5.3 <0.50
<1.0 <1.0
<0.50 <0.50
<0.50 <0.50
<0.50 <0.50
<0.50 <0.50
<0.50 <0.50
<0.50 <0.50
<0.50 <0.50
<0.50 <0.50
<0.50 <0.50
<0.50 <0.50
<0.50 <0.50
<2.0 <2.0
<0.50 <0.50
<0.50 <0.50
<0.50 <0.50
<0.50 <0.50
<0.50 <0.50
<0.50 <0.50
<0.50 <0.50
<1.0 <1.0
<1.0 <1.0
<0.50 <0.50
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TAJlLE 3 (continued)
SUMMARIZED RESULTS OF LABORATORY ANALYSIS
VOLATILE ORGANIC COMPOUNDS
GROUNDWATER SAMPLES COLLECTED APRIL-MAY 201 I
North Carolina State University
Lot 86 Site
Raleie:h, North Carolina
Sample I.D.: MW-47 FB-1 FB-2 TB-1 NC2L
(3) (4) (5) Standard (u~/L)
Sanmle Date: 4/27/11 4/28/11 5/3/11 5/3/11
EPA Method 6200 (µg/L)
Benzene <0.50 <0.50 <0.50 <0.50
Bromobenzene <0.50 <0.50 <0.50 <0.50
Bromodichloromethane <0.50 <0.50 <0.50 <0.50
Carbon tetrachloride -~1~0i5_7;it:✓ <0.50 <0.50 <0.50
Chlorobenzene <0.50 <0.50 <0.50 <0.50
Chloroform 15.8 0.54 1.1 5.7
1,2-Dibromo-3-chloroorooane <1.0 <1.0 <1.0 <1.0
1,2-Dibromoethane (EDB) <0.50 <0.50 <0.50 <0.50
1,2-Dichlorobenzene <0.50 <0.50 <0.50 <0.50
Dichlorodifluoromethane <0.50 <0.50 <0.50 <0.50
I, 1-Dichloroethane <0.50 <0.50 <0.50 <0.50
1,2-Dichloroethane <0.50 <0.50 <0.50 <0.50
I, 1-Dichloroethene <0.50 <0.50 <0.50 <0.50
cis-1,2-Dichloroethene <0.50 <0.50 <0.50 <0.50
1,2-Dichlorooropane <0.50 <0.50 <0.50 <0.50
1,3-Dichloropropane <0.50 <0.50 <0.50 <0.50
Di-isooronyl ether (!PE) <0.50 <0.50 <0.50 <0.50
Ethvlbenzene <0.50 <0.50 <0.50 <0.50
Methvlene chloride <2.0 <2.0 <2.0 <2.0
I, 1,2,2-Tetrachloroethane <0.50 <0.50 <0.50 <0.50
Tetrachloroethenc <0.50 <0.50 <0.50 0.70
Toluene <0.50 <0.50 <0.50 <0.50
I, 1,2-Trichloroethane <0.50 <0.50 <0.50 2.0
Trichloroethene <0.50 <0.50 <0.50 0.72
1,2,3-Trichloropropane <0.50 <0.50 <0.50 <0.50
1,2,4-Trimethylbenzene <0.50 <0.50 <0.50 <0.50
Vinyl chloride <1.0 <1.0 <1.0 <1.0
m,o-Xylenes <1.0 <1.0 <1.0 <1.0
o-xylenes <0.50 <0.50 <0.50 <0.50
(I) Duphcate sample; labeled "MW-61" 111 cham of custody and laboratory report.
(2) Duplicate sample; labeled "MW-62" in chain of custody and laboratory report.
(3) Field rinseate blank; labeled "MW-63" in chain of custody and laboratory report.
(4) Field rinseate blank; labeled "MW-64" in chain of custody and laboratory report.
(5) Laboratory trip blank; labeled "MW-65" in chain of custody and laboratory report.
NA= Not analyzed.
Bold type denotes detected concentrations of EPA method compounds.
Shaded type denotes concentration above North Carolina 2L standard.
PIEDMONT GEOLOGIC, P.C Page 5 of5
---
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NS
0.6
0.3
50
70
0.04
0.02
20
1,000
6
0.4
7
70
0.6
NS
70
600
5
0.2
0.7
600
NS
3
0.005
400
0.03
500
500
TABLE4
0
D SUMMARIZED RESULTS OF LABORATORY AND FIELD ANALYSES
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Sample I.D.:
Samnle Date:
EPA Method 6010 (µg/L)
Arsenic
Barium
Cadmium
Chromium
Lead
Selenium
Silver
EPA Method 7470 (µg/L)
Mereurv
nH
Temoerature (0C)
Soecific Cond. (umhos/cm)
Dissolved Oxvgen (mg/L)
Turbiditv (NTU)
Sample I.D.:
Sample Date:
EPA Method 6010 (µg/L)
Arsenic
Barium
Cadmium
Chromium
Lead
Selenium
Silver
•:PA Method 7470 (µg/L)
Mercury
oH
Temoerature (0C)
Specific Cond. (umhos/cm)
Dissolved Oxvgen (me/L)
Turbiditv (NTU)
, I PIEDMONT GEOLOGIC. P.C.
METALS AND FIELD PARAMETERS
GROUNDWATER SAMPLES COLLECTED APRIL-MAY 2011
North Carolina State University
Lot 86 Site
Raleieh, North Carolina
MW-3 MW-8 MW-111 MW-12S MW-121 MW-12D
5/3/11 5/3/11 4/28/11 5/3/11 5/2/11 4/27/11
LABlJRA111R Y A~ AL YSES
<5.0 <5.0 <5.0 9.1 <5.0 <5.0
497 15.9 33.9 603 19.4 30.2
<1.0 <1.0 <1.0 7.6 <1.0 <1.0
<5.0 <5.0 <5.0 <5.0 <5.0 33.1
<5.0 <5.0 <5.0 <5.0 <5.0 <5.0
<10.0 <10.0 <10.0 <10.0 <10.0 <10.0
<5.0 <5.0 <5.0 <5.0 <5.0 <5.0
<0.20 <0.20 <0.20 0.87 <0.20 <0.20
FIELD ANALYSES
5.9 5.8 6.3 4.7 5.7 9.6
18.2 I 7.1 18.2 17.6 18.5 19.2
98.4 33.6 102.2 326 50.6 140.2
4.6 5.5 1.7 4.6 2.0 4.3
52.9 7.10 7.09 18.2 13.1 37.9
MW-16S MW-161 MW-16D MW-171 MW-17D MW-27
5/3/11 4/29/11 4/28/11 4/29/ll 5/2/11 5/3/ll
LABOR.AT• •RY ANALYSES
7.5 <5.0 <5.0 <5.0 <5.0 <5.0
203 35.3 32.5 15.0 <5.0 42.5
1.2 <1.0 <1.0 <1.0 <1.0 <1.0
<5.0 6.1 <5.0 <5.0 <5.0 6.6
<5.0 <5.0 <5.0 <5.0 <5.0 18.1
<10.0 <10.0 <10.0 <10.0 <10.0 <10.0
<5.0 <5.0 <5.0 <5.0 <5.0 <5.0
~;J8,oJ;U <0.20 <0.20 <0.20 <0.20 <0.20
FIELD ANALYSES
5.6 6.3 7.7 5.3 5.9 5.5
17.5 17.5 17.3 17.9 17.9 17.9
114.3 100.2 122.1 26.8 54.6 31.4
4.6 1.7 4.2 1.7 3.9 7.0
69.2 63.3 I I.I 2.21 1.68 497
Page I of3
MW-13D MW-14
4/27/11 4/26/ll
<5.0 <5.0
12.1 28.5
<1.0 <1.0
11.1 6.1
<5.0 <5.0
<10.0 <10.0
<5.0 <5.0
<0.20 <0.20
8.6 6.9
18.9 21.2
61.2 23.6
4.6 6.1
31.2 89.2
MW-34DR MW-35S
4/26/ll 4/27/ll
<5.0 <5.0
47.6 33.5
<LO <1.0
<5.0 8.4
<5.0 <5.0
<10.0 <10.0
<5.0 <5.0
<0.20 <0.20
8.1 7.3
18.2 17.7
56.9 38.9
6.5 6.0
31.9 29.8
TABLE 4 (continued)
0
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Sample I.D.:
Sanmle Date:
El' A Method 60 IO (11g/L)
Arsenic
Barium
Cadmium
Chromium
Lead
Selenium
Silver
EPA Method 7470 (µg/L)
Mercury
nH
Temoerature (0C)
Soecific Coud. (umhos/cm)
Dissolved Oxvgen (mg/L)
Turbiditv (NTU)
Sample I.D.:
Sample Date:
EPA Method 6010 (µg/L)
Arsenic
Barium
Cadmium
Chromium
Lead
Selenium
Silver
EPA Method 7470 (µg/L)
Mercurv
oH
Temnerature (0C)
Snecific Cond. (umhos/cm)
Dissolved Oxvgen (mg/L)
Turbidity (NTU)
. • PIEDMONT GEOLOGIC, l'.C.
METALS AND FIELD PARAMETERS
GROUNDWATER SAMPLES COLLECTED APRIL-MAY 2011
North Carolina State University
Lot 86 Site
Raleigh, North Carolina
MW-35D MW-36S MW-36D MW-36D MW-37 MW-38
(1)
4/28/11 5/2/11 4/29/11 4/29/11 5/2/11 4/27/11
LABOllATORY ANALYSES
<5.0 <5.0 40.2 40.5 <5.0 <5.0
<5.0 247 <5.0 <5.0 767 20.4
<1.0 <1.0 <1.0 <1.0 <1.0 <1.0
<5.0 <5.0 <5.0 <5.0 <5.0 <5.0
<5.0 <5.0 <5.0 <5.0 <5.0 <5.0
<10.0 <10.0 <10.0 <10.0 <10.0 <10.0
<5.0 <5.0 <5.0 <5.0 <5.0 <5.0
<0.20 <0.20 <0.20 <0.20 <0.20 <0.20
FIELD ANALYSES
6.3 5.1 6.6 6.6 5.9 8.4
17.9 18.9 18.6 18.6 I 7.2 19.0 ·
79.4 89.3 108.2 108.2 365 134.6
5.5 2.5 1.7 1.7 3.0 3.7
3.13 30.8 3.34 3.34 4.70 12.0
MW-4ll MW-410 MW-42 MW-42 MW-421 MW-43S
(2)
4/27/11 4/29/11 4/28/11 4/28/11 4/29/11 4/28/11
LABOilATOll\ ANALYSES
<5.0 <5.0 <5.0 <5.0 <5.0 <5.0
18.5 8.8 21.7 21.7 16.0 25.2
<1.0 <1.0 <1.0 <1.0 <1.0 <1.0
9.1 <5.0 12.4 14.9 <5.0 11.0
<5.0 <5.0 <5.0 <5.0 <5.0 <5.0
<10.0 <10.0 <10.0 <10.0 <10.0 <10.0
<5.0 <5.0 <5.0 <5.0 <5.0 <5.0
<0.20 <0.20 <0.20 <0.20 <0.20 <0.20
FIELD ANALYSES
7.6 5.9 5.8 5.8 6.4 5.2
18.9 I 8.5 20.8 20.8 18.0 19.5
59.0 56.9 60.7 60.7 108.2 31.2
5.5 5.7 4.2 4.2 1.5 6.1
19.8 7.03 15.4 15.4 5.14 15.7
Page 2 of'3
MW-40 MW-41S
4/27/11 4/28/11
<5.0 <5.0
17.9 38.2
<1.0 <1.0
8.0 <5.0
<5.0 <5.0
<10.0 <10.0
<5.0 <5.0
<0.20 <0.20
7.0 7.3
19.7 18.7
28.8 65.8
6.2 5.8
26.6 87.1
MW-43D MW-46
4/28/11 4/29/11 .
<5.0 <5.0
11.7 24.2
<1.0 <1.0
<5.0 8.2
<5.0 <5.0
<10.0 <10.0
<5.0 <5.0
<0.20 <0.20
6.7 6.2
17.8 17.5
41.3 62.1
6.4 7.5
1.67 12.1
0
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TABLE 7 (continued)
SUMMARIZED RESULTS OF LABORATORY AND FIELD ANALYSES
METALS AND FIELD PARAMETERS
GROUNDWATER SAMPLES COLLECTED APRIL-MAY 2011
North Carolina State University
Lot 86 Site
Raleigh, North Carolina
Sample I.D.: MW-47 FB-1 FB-4
(3) (4)
Samole Date: 4/27/11 4/28/11 5/3/11
LABORATORY ANAL):SES
EPA Met_hod 6010 (µg/L)
Arsenic <5.0 <5.0 <5.0
Barium 42.2 <5.0 <5.0
Cadmium <1.0 <1.0 <1.0
Chromium <5.0 <5.0 <5.0
Lead <5.0 <5.0 <5.0
Selenium <10.0 <10.0 <10.0
Silver <5.0 <5.0 <5.0
EPA Method 7470 (µg/L)
Mercury <0.20 <0.20 <0.20
FIELD ANALYSES
oH 6.6 NA NA
Temoerature (0C) 19.0 NA NA
Soeeific Cond. (umhos/cm) 56.4 NA NA
Dissolved Oxygen (mg/L) 5.5 NA NA
Turbidity (NTU) 10.5 NA NA
(I) Duplicate sample; labeled "MW-6 I" m cham of custody and laboratory report.
(2) Duplicate sample; labeled "MW-62" in chain of custody and laboratory report.
(3) Field rinseate blank; labeled "MW-63" in chain of custody and laboratory report.
(4) Field rinseate blank; labeled "MW-64" in chain of custody and laboratory report.
(5) Laboratory trip blank; labeled "MW-65" in chain of custody and laboratory report.
NA =·Not analyzed. NS= No North Carolina 2L standard exists.
Bold type denotes detected concentrations of EPA method compounds.
Shaded type denotes concentration above North Carolina 21. standard.
NC 2L
Standard (µe/L)
---
IO
700
2
10
15
20
20
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NS
NS
NS
NS
NS
I PIEDMONT GEOLOGIC, P.C. Page 3 of3
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Results of Updated Groundwater Modeling
NCSU -Lot 86 Site
May 31, 2011
ATTACHMENT 2
APRIL-MAY 2011 GROUNDWATER
MODELING OUTPUT
PtEDMONTGEOLOGIC, P.C.
--- - - - - - - - - - - - --11!!!!1!!!1 !!!!!!!I !!!!I
1800
i:=-1600
LL
:c t-a::
0 z
:c 1400 t-::)
0
Vl
1200
1000
• MW43 3;1/
400
SHALLOW GROUNDWATER POTENTIOMETRIC SURFACE CONTOUR
AND FLOW VECTOR MAPS: APRIL 26, 2011 -PUMPING CONDITIONS
NCSU -LOT 86 SITE
M~4/
391.
600 800 1000
WEST -EAST (FT)
•
•
►" "'" ' .. , ' .. , ' ' "''----"''----"'""-."' ."-
~ ' ' ' ' "'"" ' "'"" ' "''----."' ' ►'\.
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\ ►
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~ -\i t _,,,'f' -►
l
400 600 800 1000
WEST -EAST (FT)
Groundwater potentiometric surface elevations in feet above site datum.
- - - - - - - - - - - - - - --!!!!!!!!!I !!!!I l!!!!!!!I
1600
;:::-u.. • -I
1-(5 1400
z
' I I-
:)
0 V)
1200
1000-
400
INTERMEDIATE GROUNDWATER POTENTIOMETRIC SURFACE CONTOUR
AND FLOW VECTOR MAPS: APRIL 26, 2011-PUMPING CONDITIONS
NCSU -LOT 86 SITE
600 800 1000
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400 600
◄ ..
+:c:: -◄--¥
.◄-,-.~◄--◄---¥
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WEST-EAST (FT) WEST-EAST (FT)
Groundwater potentiometric surface elevations in feet above site datum.
- - - - - - - - - - - - - - - -l!!!!!!!!I l!!!!l!I 1!!!!!!!11
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i=' 1600 u..
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0 z
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f-:J
0
VJ
1200
1000
400
DEEP (BEDROCK) GROUNDWATER POTENTIOMETRIC SURFACE CONTOUR
AND FLOW VECTOR MAPS: APRIL 26, 2011 -PUMPING CONDITIONS
NCSU -LOT 86 SITE
•
·~ ·~
~ /.. J' ~ ~ ' ,,~ -4--'-,,-~~.:, ' -.
600 800 1000 400 600 800 1000
WEST -EAST (FT) WEST -EAST (FT)
Groundwater potentiometric surface elevations in feet above site datum.
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1800
1600
1400
1200
SHALLOW GROUNDWATER POTENTIOMETRIC
SURFACE AND CHLOROFORM ISOCONCENTRATION
CONTOURS: APRIL-MAY 2011
NCSU -LOT 86 SITE
400
ND
"' MW46
600
WEST -EAST (FT)
800
Groundwater potentiometric surface elevations (blue) in feet relative to site datum.
Groundwater chloroform concentrations (red) in ug/L.
ND= Chloroform not detected.
NS = Well not sampled.
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INTERMEDIATE GROUNDWATER POTENTIOMETRIC
SURFACE AND CHLOROFORM ISOCONCENTRATION
CONTOURS: APRIL-MAY 2011
NCSU -LOT 86 SITE
1800--~-----~-----~-----~-~
1600
1400
1200
1000
400 600 800 1000
WEST -EAST (FT)
Groundwater potentiometric surface elevations (blue) in feet relative to site datum.
Groundwater chloroform concentrations (red) in ug/L.
ND= Not detected.
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1200
1000
DEEP (BEDROCK) GROUNDWATER POTENTIOMETRIC
SURFACE AND CHLOROFORM ISOCONCENTRATION
CONTOURS: APRIL-MAY 2011
NCSU -LOT 86 SITE
400
" ..
600 800
WEST -EAST (FT)
1000
Groundwater potentiometric surface elevations (blue) in feet relative to site datum.
Groundwater chloroform concentrations (red) in ug/L.
ND= Not detected.
D Results of Updated Groundwater Modeling
NCSU -Lot 86 Site m May31,20l1
ATTACHMENT 3
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MAY 2005 GROUNDWATER MODELING OUTPUT
PIEDMONT GEOLOGIC, P.C
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0 en
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1600
1400
1200
SHALLOW GROUNDWATER POTENTIOMETRIC SURFACE
AND CHLOROFORM ISOCONCENTRATION CONTOURS:
MAY 2005 -NON-PUMPING CONDITIONS
NCSU -LOT 86 SITE
400 600
WEST-EAST
Groundwater potentiometric surface elevations (blue) in feet relative to site datum.
Groundwater chloroform concentrations (red) in ug/L.
ND= Chloroform not detected.
NS= Well not sampled.
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~ 1400
z
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0 en
1200
1000
INTERMEDIATE GROUNDWATER POTENTIOMETRIC SURFACE
AND CHLOROFORM ISOCONCENTRATION CONTOURS:
MAY 2005 -NON-PUMPING CONDITIONS
NCSU -LOT 86 SITE
350 550 750
WEST -EAST (FT)
950
Groundwater potentiometric surface elevations (blue) in feet relative to site datum.
Groundwater chloroform concentrations (red) in ug/L.
ND= Not detected.
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1600
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I-u. ~
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z
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0 Cf)
1200
1000
DEEP GROUNDWATER POTENTIOMETRIC SURFACE
AND CHLOROFORM ISOCONCENTRATION CONTOURS:
MAY 2005 -NON-PUMPING CONDITIONS
NCSU -LOT 86 SITE
400 600 800
WEST -EAST {FT}
1000
Groundwater potentiometric surface elevations (blue) in feet relative to site datum.
Groundwater chloroform concentrations (red) in ug/L.
ND = Not detected.
E Results of Updated Groundwater Modeling
NCSU -Lot 86 Site
I May 31,201 l
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I ATTACHMENT 4
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~ bJJ ::,
~
C: 0 ·1a
.):,
5 u C: 0 u
u
0 u
SHALLOW MONITORING WELL
MW-2: Groundwater Chemical of Concern Concentrations vs. Time
North Carolina State University
Lot 86 Site
Raleigh, North Carolina
100,000
10,000
1,000
Legend
Benzene
---i■a---Chloroform
• 1,2-Dichloropropane
-v - -Groundwater surface
100
N N "' "' st st "' "' "' "' r---0 0 0 0 0 0 0 0 0 0 0 ... 6. ... /; ... ' ... 6. ... ' ... C. C. " " " " " " " " " " ~ U'.) ~ U'.) ~ U'.) ~ U'.) ~ U'.) ~
Date
\
\
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°' 0 0 0 --;-6. ... C. " " " U'.) ~ U'.)
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410.00
409.00
408.00
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407.00 ~
t)
406.00 Z q::
~
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>
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400.00 i:,... ~
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C: ::,
0
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397.00
396.00
395.00
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SHALLOW MONITORING WELL
MW-3: Groundwater Chemical of Concern Concentrations vs. Time
North Carolina State University
Lot 86 Site
Raleigh, North Carolina
100,000
10,000
1,000
10
N N 0 0 I. 6. " <I) ;;: ti)
Legend
---.---· Benzene
■
"' "' " 0 '? 0 I. P. I. " <I) " ;;: ti) ;;:
" 0
Chlorofonn
1,2-Dichloropropane
Groundwater surface
"' "' "' "' 0 0 0 0 6. I. 6. I. 6. " " <I) <I) <I)
ti) ;;: ti) ;;: ti)
Date
<-<-00 00 °' °' 0 0 0 0 0 0 I. 6. I. 6. ~ 6. " <I) " <I) <I) ;;: ti) ;;: ti) ;;: "'
0 0 --I. fr I. " " ;;: U) ;;:
410.00
408.00
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407.00 ~
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406.00 ~
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5,
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400.00 ~ il ~
399.00 ~
c ;:,
0
398.00 0
397.00
396.00
395.00
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SHALLOW MONITORING WELL
MW-6: Groundwater Chemical of Concern Concentrations vs. Time
North Carolina State University
Lot 86 Site
Raleigh, North Carolina
100,000
10,000
■ --------------~■1--------••---
1,000 •
100
10
N 0 ~ 2
/
/
/
/
/
/
. Legend
Benzene ---,=---Chlorofom1
\
\
\
\
\
\
.;. 1,2-Dichloropropane
- --v - -Groundwater surface
N M M " " .,., .,., <c, <c, 0 0 0 0 0 0 9 0 0 6. /. 6. /. 6. /. /. 6. "' Q) "' Q) "' Q) "' Q) "' Q) VJ 2 VJ 2 VJ 2 VJ 2 "'
Date
r--
0 ~ 2
\
\
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\
\
00 00 °' 0 0 0 /. ' ~ "' " " 2 Cl] 2
~-
°' 0 0 0 6. ~ 6. /.
" " " Cl] 2 Cl] 2
410.00
409.00
408.00
~
407.00 ~
" 406.00 ~
~
,::: 405.00 0 ·.g
~
404.00 1i:l
1:l <l:l 403.00 !3
C/l
402.00 ·1
0 -401.00 ·.::, El 0
400.00 i:i... ~
399.00 _g
,::: g
398.00 0
397.00
396.00
395.00
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lj
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SHALLOW MONITORING WELL
MW-8: Groundwater Chemical of Concern Concentrations vs. Time
North Carolina State University
Lot 86 Site
Raleigh, North Carolina
100,000
10,000
/
1,000 /
/
100
______________-e
• •
JO
0.1
N N M M ..,. ..,. "' "' "' 0 9 0 0 0 0 0 0 0 ,'.. ,'.. , ,'.. 6. ia 6. ia fr 0. "' "' " "' " " 2 u, 2 u, 2 u, 2 u, 2
\
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Date
.
■
\
\
.....
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\
\
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00 0 ,'.. "' 2
Legend
00 0 6. " u,
Benzene
Chloroform
1,2-Dichloropropanc
"' . "' 0 0 0 0 -,'.. 6. ,'.. 6. "' " "' " 2 u, 2 u,
,'.. "' 2
410.00
409.00
408.00
~ 407.00 Ci > " 406.00 Z ¢:: ~
405.00 t:: 0 ·.g
~
404.00 m
<l) u
403.00 <S ... ;:l
Cl)
402.00 -~
8 0 401.00 . ..,
5 -0
400.00 ~ ... <l)
"' 399.00 i:< 'O t:: ;:l
8 398.00 c
397.00
396.00
395.00
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b = 0.) <.l = 0 u u
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0 .... c.,
SHALLOW MONITORING WELL
MW-11: Groundwater Chemical of Concern Concentrations vs. Time
North Carolina State University
Lot 86 Site
Raleigh, North Carolina
8,000 ;\
I \
7,500 I \
I \
7,000 7 \
I \
6,500 I \ /
I 6,000 /
I
5,500 /
5,000
4,500
4,000
3,500
3,000
2,500
2,000
1,500
1,000
500
\
\
\
Legend
Benzene
■ Chloroform
1,2-Dichloropropane
- -Jv - -Groundwater surface
\
\
\
\
\
\
\
Tl 111111111 I Iii I I Iii I I 1111111111111 ITI 111111111 Ii
N N "' "' ..,,. ..,,. "' "' '° '° r--r--00 00 °' °' 0 0 -0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 -... , ... ' ... ' ... ' ... ' ... ' ' b. ~ b. ~ b. ... 0. 0. 0. 0. 0. 0. ~ "' " "' " "' " " " " " "' " " " " " " ::; U') ::; U') ::; U') ::; U') ::; U') ::; U') ::; U') ::; U') ::; U') ::;
Date
410.00
409.00
408.00
~
407.00 ~
c.,
406.00 ~
~ = 405.00 .s .;
t
404.00 ~
1:l <l:l 403.00 3
Cl)
<.l
402.00 -~
0 401.00 ·,:; El 0
400.00 r,... ~
399.00 _g = ::,
398.00 ~
397.00
396.00
395.00
I
g
I I
INTERMEDIATE MONITORING WELL
MW-111: Groundwater Chemical of Concern Concentrations vs. Time H North Carolina State University
D Lot 86 Site
Raleigh, North Carolina
550 410.00
D 57 _,..
409.00 _,.. \
500 \ u \ 408.00 I \
450 I \ ,,...,
407.00 Ci I \ > \ 0
400 \ 406.00 Z ,,...,
~ I ~ \ ~
\ A ;:s 405.00 0 ~ I "{a A 350 \ .9 > I \ Q) I 'ca 404.00 i.il 'a \ Q) Q) \ u u 300 <l:! A \ 403.00 ~ I 0 I 51 u 17 r/J u I y I u
0 250 \ 402.00 ·i;
Q) u \ a I ,... "\ I 0 ~ V I 401.00 .,,
17 ? I \ A ~ 200 ~ Q) I ~ "Cl v \I 0 A V 400.00 i:,...
I ;:s I !, 0 ,...
'ca 0 Legend 150 399.00 ~
Benzene "Cl A I Chloroform ;:s
0
100 1,2-Dichloropropane 398.00 cj
- -JC/ - -Groundwater surface I 397.00
50
396.00
I 0 mT11111 395.00
I N N M M " " .,., .,., "' "' t--t--00 00 a, a, 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 -I, ' I, b.. I, b.. I, b.. I, ' I, b.. ~ b.. I, ' ~ fr I, 0. 0. 0. '" " '" " '" " '" " '" " '" " " '" " '" ;;; Cl] ;;; Cl] ;;; Cl] ;;; Cl] ;;; Cl] ;;; Cl] ;;; Cl] ;;; UJ ;;; Cl] ;;;
I Date
I
I
n
D
E
m
I
I
I
~
I t::I OJ)
;:l ~
C:
I -~ "' .!:,
5 u C:
I 0 u u
0 u I~ ;;:
'tl C:
I]
I
I
I
I
I
I
SHALLOW MONITORING WELL
MW-12: Groundwater Chemical of Concern Concentrations vs. Time
North Carolina State University
Lot 86 Site
Raleigh, North Carolina
100,000
90,000 Legend
Benzene
80,000
■ Chloroform
1,2-Dichloropropane
Groundwater surface ----<;-
70,000
60,000
50,000
40,000
30,000
20,000
10,000
0
N N 0 0 ,'., b. "' " 2 CJ)
/
/
/
,..,
0 ,'.,
"' 2
/
/
,.., "" "" .,.,
0 0 0 0 ' ,'., b. ~ C. " "' " CJ) 2 CJ) 2
\
\
.,.,
0 b. " CJ)
\
\
"' 0 ,'.,
"' 2
\
\
\
"' 0
b. " CJ)
\
\
r--
0 ,'.,
"' 2
Date
r--00 00 °' 0 0 0 0 b. ~ ' ~ C. " " CJ) 2 CJ) 2
°' 0 0 0 -b. ,'., ' C. " "' " CJ) 2 CJ)
~ 2
410.00
409.00
408.00
407.00 5'
>
406.00 ~
¢::
~ 405.00 :::
·il
404.00 ~
@
403.00 1.l c/::l s
402.00 ~
401.00 .j
0 ·a
400.00 §
0
"'" 399.00 2
"' .g 398.00 c:
;:l
8
397.00 0
396.00
395.00
394.00
I
u
D INTERMEDIATE MONITORING WELL
I MW-121: Groundwater Chemical of Concern Concentrations vs. Time
North Carolina State University • Lot 86 Site
Raleigh, North Carolina
I
I
10,000 ----------v-•~ 410.00
409.00 ~--408.00 •
I
I ~ bl) ;:,
~
C:
I -~
;:,
5 u
C:
I 0 u u 0 u I .... ~
"' '"O C:
I ;:,
0 .... C)
I
Legend ~ 1,000 Benzene 407.00 ~
•--Chloroform C)
406.00 Z
,XI •--1,2-Dichloropropane ¢:
\ ~ '1· -"v - -Groundwater surface C:
/ \ . 405.00 0 ·~ / \ li 100 / \ 404.00 ~ / \ " / \~l u
/ 403.00 ~
!3 • / (/)
/ u
ef \ 402.00 J;
" \ E
10 \ 401.00 -~
\ 5 -0 \ 400.00 0.. .... \ (l)
\ el ♦ r 399.00 "' \ I '"O
'I_ " C: ;:, I 0 1 \ I 398.00 0 v-v-"' --v v; I
I I 397.00 I
'( I
I ~ 396.00
0.1 395.00
I N •N "' "' st st .,., .,., 'D 'D t--t--00 00 °' °' 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 -;' .'.. ' .'.. b. .'.. ' .'.. b. .'.. ii-.'.. ' ' b. .'.. ' ~ .'.. 0. fr 0. a 0. 0. "' " "' " "' "' " "' "' " " "' " " "' :;s r,J :;s r,J :;s r,J :;s r,J :;s r,J :;s r,J :;s r,J :;s r,J :;s r,J :;s
I Date
I
I
D
D
I
I
I
I
I
I ~ OJ)
;:I ~
C
I -~
;:,
5 (.)
C
I 0 u u
0 u
I .... ~ ::: "O C
I ;:I
0 ....
0
I
I
I
I
I
I
SHALLOW MONITORfNG WELL
MW-16: Groundwater Chemical of Concern Concentrations vs. Time
North Carolina State University
Lot 86 Site
Raleigh, North Carolina
35,000
30,000
25,000
/
/
/
/
20,000
15,000
'?
/ \
/ \
/ \
'j1 \
/ \
/ \
■
Legend
Benzene
Chlorofom1
\
\
\
\
\
\
--•--1,2-Dichloropropane
I 0,000 ----v - -Groundwater surface
5,000
\
\
\
\
\ V
-
0
~-:-----A __ i'
1111111111111r1Tnn11111 r 11111r-
N N "' "' st st .,., .,., "' "' t--t--00 00 °' °' 0 0 -0 0 0 0 9 0 0 0 0 0 0 0 0 0 0 9 ~ ' ,'.. b. fr ,'.. b. ~ b. ,'.. b. ~ b. ~ ~ b. ,'.. 0. ~ 0. " "' " "' "' " " "' " " " " " 2 "' 2 "' 2 "' 2 "' 2 "' 2 "' 2 "' 2 "' 2 "' 2
Date
410.00
409.00
408.00
~
407.00 ~
0
406.00 Z ¢:
~
C 405.00 0 -~
>
404.00 clJ
" (.)
403.00 </:l .... ;:I
C/l
(.)
402.00 'Ei " s 0 401.00 ·.p
C " -0
400.00 "" .... " "' 399.00 ::: "O C ;:I e 398.00 o
397.00
396.00
395.00
I
D
I
m
I
I
I
I
I
I
I
I
I
;I
I
I
I
I
I
~ ;:l ~
C: .Si 1i, ;:,
5 u C: 0 u u
0 u ._.
Q) 1i,
~ "Cl C: ;:l 0 ....
0
INTERMEDIATE MONITORING WELL
MW-161: Groundwater Chemical of Concern Concentrations vs. Time
North Carolina State University
Lot 86 Site
Raleigh, North Carolina
8,000
7,500
7,000
6,500
6,000
5,500
5,000
4,500
4,000
/
/
/
/
/
/
/
J1
/ \
/ \
',' \
Legend
--<>-----Benzene
Cl
\
\
\
\
\
\
3,500 --JJ --Groundwater surfa e
3,000
2,500
2,000
1,500
1,000
500
0
N N "' "' "" "" "' ,,., "' "' 0 0 0 0 0 0 0 9 0 0 ... 6. ... ' ... 6. ... ~ 6. C. C. cl " cl " "' " "' " " :2 UJ :2 UJ :2 UJ :2 UJ :2 UJ
Date
\
\
\
\
r---r---0 0 ... ' C. "' " :2 en
\
\
■
v
\
00 0 ~ :2
y
I \
y ,/; I
I \
\ 'jl 'j'
;/ I
I
00 °' °' 0 0 0 0
6. ... 6. ~ " "' " en :2 "' :2
0
6. " UJ
y
I\
Ii
I I
I I
--~ :2
410.00
409.00
408.00
407.00 8 . >
406.00 ~
¢::
405.00 ';:;'
0 ·-g
404.00 a';
@
403.00 1l ~ s
402.00 ~
-~
401.00 S
0
400.00 .°§
0 0-,
399.00 ~ 1i,
~
398.00 1J
8
397.00 0
396.00
395.00
394.00
I
I
0
E
E
I
I
I
~
I ~
;:l ~
C:
0 I ·.g
;::,
6l u C:
I 0 u
u
0
I u .... OJ .; ::: "O
I C: ;:l
0 .... CJ
I
I
I
I
I
I
DEEP MONITORING WELL
MW-16D: Groundwater Chemical of Concern Concentrations vs. Time
North Carolina State University
Lot 86 Site
Raleigh, North Carolina
5
4.5
4
3.5
3
2.5
2
1.5
l
\
I
I
I
I
I
I
0.5 --Iii-_____.-------
0 lTI
"" "" V> V> '° '° r--0 'i' 0 0 0 0 0 ' /, " § " /, § <..> " " " " " ..... 0 ..... 0 ..... 0 .....
r--00 'i' 0 § <..> " 0 .....
Date
■
Legend
Benzene
Chloroform
1,2-Dich!oropropane
-"1 -Groundwater surface
r-v
V I y
'v/ \ I I /I
I
\ I
~
00 "' "' 0 0 0 0 0 -" /, " § " " " " " 0 ..... 0 ..... 0
Non-detected concentrations are plotted at one-half the detection limit.
--§ .....
408.00
407.00
406.00
~
Cl > CJ 405.00 z
¢::
~
C: 404.00 -~
~
403.00 u:l
OJ <.)
~ ....
;:l
402.00 Cl)
·E
OJ a 401.00 .,g
fil 0
400.00 ~ .... OJ .; :::
399.00 "O C: ;:l e
CJ
398.00
397.00
396.00
I
D
I
I
•
I
I
I
I Q'
bi) ::,
~ = I .Sl .,
t, = OJ (J = I 0 u u
0 u I ... OJ ~ "' :$ "O
I = ::, 0 ...
0
I
I
I
I
I
I
SHALLOW MONITORING WELL
MW-17: Groundwater Chemical of Concern Concentrations vs. Time
North Carolina State University
Lot 86 Site
Raleigh, North Carolina
12,000
11,000
Legend
---+----Benzene
---1111--Chloroform
10,000 1,2-Dichloropropane
---V - -Groundwater surface
9,000 -
8,000
7,000 -
6,000
5,000
4,000
3,000
2,000
1,000 ■------.
'?
I\
/ I
I
,!,
I /
'!>
0 .---------------• -■-■,
1111111111111 ilTTT 11111111111111111 r TiTinmT
N N M M -st -st V) V) '° '° r--r--00 00 °' °' 0 0 0 0 0 ~ 0 0 0 0 0 0 0 0 0 0 0 -,!. 6. ,!. ' 6. ,!. ' ,!. 6. ,!. fr ,!. ' ~ 6. ' 0. 0. fr il " " " " " " " " "' " "' "' " ~ "' ~ "' ~ "' ~ "' ~ "' ~ "' ~ "' ~ "' ~
Date
0
6. " "'
-~ ~
410.00
409.00
-408.00
407.00
~
406.00 ~
405.00 ~
404.00 5 = 0 403.00 ·-g
~
402.00 iii
401.00 ] ... ::,
400.00 ~ I,
399.00 S
0
398.00 .6
397.00 d::
396.00
395.00
394.00
393.00
392.00
391.00
390.00
... OJ .,
:$ "O = ::, e 0
a
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
~ bJ)
;:I ~
C: 0 ·.g
;::,
ii (.)
C: 0 u
u 0 u
H ·(I) .; ;;:
-0 C: ;:I 0 '-< 0
INTERMEDIATE MONITORING WELL
MW-171: Groundwater Chemical of Concern Concentrations vs. Time
North Carolina State University
Lot 86 Site
Raleigh, North Carolina
2,600 4 I 0.00
2,500 409.00
2,400 Legend
~ Benzene 408.00 2,300 ■ Chloroform
2,200 --1,2-Dichloropropane 407.00
2,100 Groundwater surface ,-. --.,;/---406.00 ~
2,000 0
1,900 405.00 z
1,800 404.00 ~
1,700 403.00 ·~
1,600 ~ 402.00 1,500 7--.,;; (I)
1,400 / ' 401.00 ~ / ' ;:I
1,300 / ' 400.00 Cll /
/ ' J; 1,200 / ' 399.00 (I)
' a I, I 00 ' 0 ;1 398.00 -~ 1,000 ' E
900 1' I 397.00 0
...,_,'., . ""' I H 800 (I)
\ ♦" 396.00 .; 17 700 \ i o/ ;;:
"1\ 395.00 -0 C: 600 ?.....,; ;:I
0
500 394.00 H 0
400 393.00
300
200 ·-----·---392.00
JOO 391.00
0 390.00
N N M M "<t "<t "' "' "' "' r--r--00 00 °' °' 0 0 -0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 -.!. b. .!. b. ~ b. .!. b. .!. b. .!. b. ~ b. ~ b. .!. ' .!. Q. "' " "' " " "' " "' " " " " " "' " " :E [/) :E [/) :E [/) :E [/) :E [/) :E [/) :E [/) :E [/) :E [/) :E
Date
D
I
I
m
I
I
I
I
I ;J
bI)
" ~
Ci
I -~
t,
5 u = I 0 u
u
0
I u .... ~
"' -0
I Ci
" 0 ....
0
I
I
I
I
I
I
DEEP MONITORING \VELL
MW-17D: Groundwater Chemical of Concern Concentrations vs. Time
North Carolina State University
Lot 86 Site
Raleigh, North Carolina
10,000
1,000 ./ I
I
100
/♦
/J
10
1
0.1
._,-._,-"' "' "' 0 0 0 9 0 ' b "' ' § 0 § " " " ,-, i'.l ,-, i'.l ,-,
I
I
I
I
"' 0 ' 0 " i'.l
I
I
I
r-0 ' § ,-,
\
11'
Legend
Carbon tetrachloride
---a■--Chlorofonn
1,2-Dichloropropane
TCE
- --1v - -Groundwater surface
I
sf
I
I
r-00 00 °' °' 0 0 0 0 0 0 0 --' ' b ' b ' ' 0 " § § 0 " " " " " i'.l ,-, i'.l ,-, i'.l ,-, i'.l
Date
-;'
§ ,-,
402.00
401.00
400.00 8
> 0
399.00 ~
~
Ci 0
398.00 ·.g ~
0) u
397.00 ~ s U'.l
396.00 ·1
0 ·a
.@ 395.00 o
0...
~
394.00 _g
§
8
393.00 O
392.00
391.00
I
n
D
I
I
I
I
I
I
I
I
I
I
I
I
I
I
SHALLOW MONITORING WELL
MW-27: Groundwater Chemical of Concern Concentrations vs. Time
North Carolina State University
Lot 86 Site
Raleigh, North Carolina
25
20
15
I
I
10
5
►
I
I
I
I
I
I
I
1/
I
I
I
I
I
I
Legend
~ Carbon tetrachloride
---11-1----Chlorofonn
:-1,2-Dichloropropane
----1;>---TCE
- --V -Groundwater surface
Date
410.00
409.00
~ Ci > 0 z
408.00 4:: ~
C: 0 ·i
~
407.00 8
<S !3
Cl)
(.) -~
406.00 §
405.00
404.00
403.00
·,:J
~
0
t:,...
¥ ~ 8 0
I
g
u
m
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
;J
bi)
;::l ~
C .g
"' .t:,
5 (.)
;::l
0 u u 0 u ....
%l
"' "O C ;::l
0 .... 0
SHALLOW MONITORING WELL
MW-35S: Groundwater Chemical of Concern Concentrations vs. Time
North Carolina State University
Lot 86 Site
Raleigh, North Carolina
2.5
2
1.5
I
I
I
I
I
I
I
I
Legend
Chloroform
I
I
I
I
I
I
I
I
---'v - -Groundwater surface
0.5 /.
I
I
I
I
I
l.,
I
\ I
'17
♦-♦
I
I \ 7
I \ I \
w ,J \
I /
~ \ ?
\ I\
\ I
w
0 -~~'1"117711~1 I ~I I ~I I ~11 l~l 17711"117711~11 ~I I ~I I ~1 I l~l 17711"117711~11 ~I I ~I I ~I I c"-
N N M M " " V) V) "' "' ,-,-00 00 "' "' 0 0 -0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 -.!, ' .!, 6. .!, ' .!, 6. .!, ' .!, ' ' ' ~ 6. ' 6. .!, C. C. C. C. h C. iil "' " "' " "' " "' " "' " "' " "' " " " "' ;. <Zl ;. <Zl ;. <Zl ;2 <Zl ;2 <Zl ;2 <Zl ;2 <Zl ;. <Zl ;2 <Zl ;2
Date
Note: non-detected concentrations are plotted at one-half of the detection limit.
401.00
400.00
~ Cl > 0 399.00 z
~ ~
C 0 ·-g
398.00 > @
(l)
(.)
<.':l .... ;::l
397.00 C/l
(.) .{i
8 0 ·,:,
396.00 C ~ 0 0-. .... (l)
'co
"' 395.00 "O C ;::l
8 0
394.00
393.00
I
0
M
m
I
I
I
I
I ~ ;::s
~ c=
I -~
t,
5 u c=
I 0 u ·u
0 u
I 1-,
QJ
ttj· :< "O c= I ;::s
0 1-,
0
I
I
I
I
I
I
,.
DEEP MONITORING WELL
MW-35D: Groundwater Chemical of Concern Concentrations vs. Time
North Carolina State University
Lot 86 Site
Raleigh, North Carolina
60
55
50
45
40
35
30
25
20
15
10
5
Legend
Benzene
Chloroform
1,2-Dichloropropane
- --v - -Groundwater surface
410.00
409.00
408.00
407.00
~
406.00 ~
0 405.00 z
• 404.00 <I:: ~
c= 0
403.00 -~
>
402.00 di
QJ
401.00 u <S ::l
400.00 r/J
u
399.00
·i:; s 0
398.00 . ..,
~
397.00 0 0..
1-,
396.00 QJ 1'i :<
395.00 "O c= ;::s
0
394.00 cJ
393.00
392.00
-391.00
11111111111111111 TTTTTTT 11111 i 1Tflll 390
·
00
N N "' "' st st "' "' "' "' r--r--00 00 °' °' 0 0 -0 0 0 0 0 0 0 9 0 0 0 0 0 0 0 0 -, b. ~ b. I. , I. I. b. I. , ~ b. ~ b. ~ , ~ .... 0. 0. 0. fr "' ., ., "' ., "' ., "' ., "' ., ., ., 2 [/) 2 [/) 2 [/) 2 [/) 2 [/) 2 [/) 2 [/) 2 [/) 2 C/l 2
Date
g
D
D
R
m
I
I
I
I ~ bO ::, ~ = 0 I "!
5 <.) = I 0 u u 0
I u ... (l) -"' i:: -0
I = ::,
0 ... C
I
I
I
I
I
I
SHALLOW MONITORING WELL
MW-36S: Groundwater Chemical of Concern Concentrations vs. Time
North Carolina State University
Lot 86 Site
Raleigh, North Carolina
35,000
30,000
25,000
20,000
15,000
I 0,000
5,000
/
,;/
N N 0 0 .!. 6.. "' " :;; <ll
/
/
/
/
/
/ \
\
\
\
\
\
\ ~-----------~
M 0 .!. "' :;;
. .
-=
Legend
Benzene
Chlorofonn
..;.. 1,2-Dichloropropane
--V --Groundwater surface
M -st -st "' "' 'D '° r--0 0 0 0 0 0 9 0 6.. .!. 6.. ~ fr .!. .!. P. " "' " "' " "' <ll :;; <ll :;; <ll :;; <ll :;;
Date
\
\
\
r--0 6.. " <ll
00 0 ~ :;;
00 °' 0 0 6.. ~ " <ll :;;
°' 0 0 0 ' ~ 6.. P. " " <ll :;; <ll
~ :;;
410.00
409.00
408.00
~
407.00 Q > C
406.00 Z ~ ~ = 405.00 0 '"§
>
404.00 @
(l) <.)
403.00 c$:l s (/')
402.00 .,l ;,
(l) a 0 401.00 ·_p
5 -0
400.00 "' ii 'iii
399.00 ::: -0 0 ::,
2 398.00 c
397.00
396.00
395.00
I
H
D DEEP MONITORlNG WELL
I MW-36D: Groundwater Chemical of Concern Concentrations vs. Time
North Carolina State University
I Lot 86 Site
Raleigh, North Carolina
I 2,400 410.00
Legend 409.00 2,200 Benzene
I Chloroform 408.00
2,000 ---v--Groundwater surfac ,-..,
I 407.00 0 >
1,800 0
406.00 Z
I ~ ¢::
~
bl) --,\ C: " 1,600 405.00 0 ~ ·:g C: \
-~ :>
I \ 404.00 @ .;:, 1,400 ?' \ 5 / "' \ (J
(J / 'g C: \ 403.00 I 0 / u 1,200 ■ / \ Cl}
u ,I \ 402.00 ·E 0 "' I u s ... 1,000 \ 0 ~ 401.00 ·.c
\ ,:; il': " \ ~ 'Q 0
I C: 800 \ 400.00 p..
" !J 0 \ ... to 0 \ 'i( 399.00 _g
I 600 \, ✓ 'vl\ ,:; -v " I 'Z 0 \ '? 398.00 0
400 \ I \ -
I "( I I 397.00 \u I 200 396.00 I .:::=::::::.=-,TTTTff--0
1111111111111
395.00
I N N M M ... ._,. .,., .,., '° '° r--r--00 00 "' "' 0 0 0 0 0 9 0 0 0 0 0 0 0 0 0 0 0 0 '-;' ,!, 6. ,!, ,!, 6. ,!, 6. ,!, 6. ,!, 6. ,!, 6. ' 6. ~ ,!, P. ~ P. " "' " "' " "' " "' " "' " "' " "' "' "' " 2 C/J 2 C/J 2 C/J 2 C/J 2 C/J 2 C/J 2 C/J 2 C/J 2 C/J 2
I Date
I
I
I
D
D
D
D
I
I
I
I
I
I
SHALLOW MONITORING WELL
MW-37: Groundwater Chemical of Concern Concentrations vs. Time
North Carolina State University
Lot 86 Site
Raleigh, North Carolina
1,000,000
100,000
--------■---&
10,000
/
/
/
/
/
1,000
100
\
\
\
\
\
\
\
\
\
\
\
Legend .
10
N N "' "' "" "" 0 0 0 0 0 0 "' 0
Benzene
Chlorofom1
1,2-Dichloropropane
Groundwater surfaCe
"' "' "' ..... ..... 0 0 0 0 0
\
\
'-6.. '-6.. '-6.. '-' '-6.. '-6.. 0. "' " "' " "' "' "' "' " " " " ~ Ul ~ Ul ~ Ul ~ Ul ~ Ul ~ Ul
Date
00 00 0 0 ~ ' il-~ Ul
410.00
409.00
408.00
,....__
407.00 Cl > 0
406.00 Z ¢::
~
C 405.00 .9 .,
404.00
!)
iil
ec=-8
//
~ 403.00 ~
402.00 ·1
401.00 Ji
y
\
'v
/\
I I
11111111111m
°' °' 0 0 0 0 -~ 6.. ' 6.. '-:;; " " "' ~ Ul ~ Ul ~
5 0
400.00 ~ .,
399.00 .g
§
398.00 ~
397.00
396.00
395.00
I
I
a
D
I
I
I
I
I ~ bl) ;:,
~
C
I .9 .,
.t,
5 u C
I 0 u u
0 u
I .... " .,
::: "C
I C ;:,
0 ....
c.:i
I
I
I
I
I
I
SHALLOW MONJTORJNG WELL
MW-40: Groundwater Chemical of Concern Concentrations vs. Time
North Carolina State University
Lot 86 Site
Raleigh, North Carolina
600
550
500
450
400
350
300
I
250
200
I
I
I
I
I
I
I
I
I
I
\
I
I
Legend
Chloroform
I
\
\
I
I
\
\
\
I
150 -Jv - -Groundwater surface
50 /
N N "' "' "" "" .,., .,., "' "' r---0 0 0 0 'z 0 0 0 0 0 0 .!. 6. .!. 6. ' .!. 6. .!. ' .!. il-C. "' OJ "' OJ "' "' OJ "' OJ "' :;; <ll :;; <ll :;; <ll :;; <ll :;; <ll :;;
Date
I
'r
I I
I I \ r I I I I I
I VI 7
r---00 00 0 0 S' 6. .!. C. OJ "' OJ <ll . :;; <ll
/ 'r
"' I I
I I
I \ I
1I \ I VI \I
o/
°' °' 0 0 .!. fr "' :;; <ll
0 0
~ 6. .!.
OJ "' :;; <ll :;;
411.00
410.00
~
Q >
409.00 ~
~ ~
C 0 ·.c "' 408.00 ~
1:l
<:::l !3
407.00 r.r,
·t
0 ·.c
406.00 .§
0 r:,...
~ ~ 405.00 C ;:,
404.00
403.00
e
c.:i
I
I
I DEEP MONITORING WELL
D MW-41D: Groundwater Chemical of Concern Concentrations vs. Time
North Carolina State University
u Lot 86 Site
Raleigh, North Carolina
25 400.00 I Legend
Benzene
I ■ Chloroform 399.00
1,2-Dichloropropane
5< .s; - -Groundwater surface / ,-._
I 20 / \ · 398.00 ~ 'v \ 0 \ z ~ \ ¢: I \ 397.00 ~
,:: as \ -~ ~
,:: \ 0 !, I -~ 15 \ 396.00 [il i::J \ <I) i'l u u \ ~ <1 \ I-< I 0 as u \ 395.00 C/)
u \ -1; 0 <I) u \ 8 I I-< \ 0 0) 10 394.00 ·.::, "' \ 5 :!' \ -"Cl 0 ,::
\ ""' I as 'v t; e
0 \,, /\ 393.00 .;
I \, :!'
V , I "Cl
II ,::
'v as 0 5 392.00 c'.5
I ./
-391.00
I • • • 0 390.00
I " " "' "' '° '° r--r--00 00 ~ ~ 0 0 -0 9 0 0 0 0 0 0 0 0 0 0 -;--' § u § u ' u 6 u 6 u 6 § § u " u " " " "' " "' " "' " "' " ...., Cl ...., Cl ...., Cl ...., Cl ...., Cl ...., Cl ...., Cl ....,
I Date
I
I
I
I INTERMEDIATE MONITORING WELL
I MW-42I: Groundwater Chemical of Concern Concentrations vs. Time
North Carolina State University
I Lot 86 Site
Raleigh, North Carolina
70 410.00 I 409.00 65
I /1 408.00
/ \
60 / \ 407.00
:;, \ ,-._
I 55 / \ 406.00 ~
/ \ Cl / \ 405.00 z /
I J 50 / \ 404.00 ¢:
~
01) / \ C: 2., \ -403.00 -~ C: 45 ·! \ i, I Legend \ 402.00 ul
C: 40 Benzene \ " " " " \ 401.00 <S C: ■ Chloroform \, ~ ~ I 0 u 35 • 1,2-Dichloropropane 400.00 Cl) \ 'I u Groundwater surface 'i( 'i'. I .Sl
0 --v -I " 399.00 j u Iv \ I -
I ... 30 v 0 " 398.00 "f§ .,
i:! E "O 25 397.00 0 C: p... I " ti 0 ... 396.00 ., Cl 20 I .g
I I I 395.00 C: " 15 11 0
~ 394.00 0
I 10 393.00
392.00
5
I 391.00
0 390.00
I N N "' "' st st <n <n '° '° r--r--00 00 °' °' 0 0 0 0 0 0 0 0 0 9 0 0 0 0 ~ 9 ~ 0 ta 6. ,'.. fr ta 6. ,'.. 0. ta 6. ta 6. 0. 6. ,'.. 6. ,'..
" "' " "' " " " " " "' " "' :;; Cl} :;; Cl} :;; Cl} :;; Cl} :;; Cl} :;; Cl} :;; Cl} :;; Cl} :;; Cl} :;;
I Date
'I
I
I
I
D
I
•
I
I
I ~ ::s ~
C 0
I -~ '" b C <l) u C
I 0 u
u 0 u
I l:l '" ~ "O
I
C ::s 0 ...
0
I
11
I
I
I
I
SHALLOW MONITORING WELL
MW-43S: Groundwater Chemical of Concern Concentrations vs. Time
North Carolina State University
Lot 86 Site
Raleigh, North Carolina
15
"--I --..
I --..
I 'i(
I \
I \
I
10 I \
I \
I
I
I
,.j
5 Legend
. Chlorofom1 ~
\
\
\
\
\
\
-'v - -Groundwater surface
0
N N "' <'i "' "' "' "' '° '° r-0 0 0 0 0 0 0 0 0 0 0 .!, 6.. .!, 6.. .!, 6.. .!, 6.. .!, ' ~ ro " ro " ro " ro " ro fr 2 en 2 en 2 en 2 en 2 en 2
Date
394.00
393.00
392.00
391.00
\ 390.00
\
\
\
\ I \
\ I V I 389.00
'7 'f"" \ \
'\ I I w-
I I \J I 'i' 388.00 i
387.00
r-00 00 °' °' 0 0 -0 0 0 0 0 6.. ~ 6.. ~ 6.. .!, 6.. .!,
" " " ro " ro en 2 en 2 en 2 en 2
~
Q > 0 z
¢::
~
C
-~
> cll
<l) u ]
CZ)
u "i a 0 ·.c l'i -0
I'. ... <l)
'" ~ "O
C ::s 8 0
m
I
I DEEP MONITORJNG WELL
I
MW-43D: Groundwater Chemical of Concern Concentrations vs. Time
North Carolina State University
I Lot 86 Site
Raleigh, North Carolina
I 10 392.00
I 9 'Z
' 391.00
' ' ~
I 8 'v Legend Cl > \ ~ Chloroform 0
\ .s;J--Groundwater surface z
I ~ 7 \ 390.00 ~ ~
\ c ;:, 0 ~ -~ c \
0 \ >
I -~ 6 \ clJ t, c \ 389.00 "' "' u u <l"l c \ 3 I 0 u 5 \ Cl)
u \ u
0 \
fj
u "' 388.00 s I ... \· 0 ~ 4 \ ·.o
~ 5 \ -'O 0 c \ ~ I ;:,
2 ...
3 ·~ \ "' 0 " 387.00 cl \ \ ~
\ \ 'O c I \, 'i'-., "-"' 0 2 ' ...
I I I 0
I \ I I 386.00
V I ? I ,f
I 0 385.00
I '<t '<t "' "' "' "' c-c-00 00 ~ ~ 0 0 0 0 0 0 0 C/ 0 0 0 C/ 0 0 --§ ' ' c'., § § c'., i: § c'., i: c'., § u " u u " ::, . " " " ::, " " ::, " ...., Cl ...., Cl ...., Cl ...., Cl ...., Cl ...., Cl ...., Cl ....,
I Date
Note: non-detected concentrations arc plotted at one-half of the detection limit.
I
I
D
I
I
I
I
I
I
~ I ~ ::,
~
::: 0 I -~
;:,
5 (J ::,
I 0 u
u
0
I u
H (l.)
"ii, ;;:
"O
I ::: ::,
0 H 0
I
I
I
I
I
I
SHALLOW MONITORING WELL
MW-45: Groundwater Chemical of Concern Concentrations vs. Time
North Carolina State University
Lot 86 Site
Raleigh, North Carolina
40
r--'\
35 I \
I \
I \ I \
30 I \ I \ I
I \
I 25 I
I
I
I
20 -J
15 Legend
. Chloroform
\
\
\
\
\
\
-<1 --Groundwater surface,
10
5
0
N N M M " " .,., .,., '° '° .--0 0 0 0 ~ 0 0 0 0 0 0 ,!. 6.. ,!. 6.. 6.. ,!. ' ,!. 6.. ,!. ii' " '" " '" " '" " " '" " 2 u:, 2 u:, 2 u:, 2 u:, 2 u:, 2
Date
\
\
I
\ y
\
\
w-;-._ I w
}'"l "' I " \ \ I \ I ? l;,
l;,
.--00 00 "' "' 0 0 0 0 0 0 0 --' ' 6.. ~ 6.. ~ 6.. A. ~ " '" '" '" u:, 2 u:, 2 u:, 2 u:,
Note: non-detected concentrations are plotted at one-half of the detection li1J1it.
402.00
401.00
~
Cl
400.00 6
z
¢::
~ ::: 399.00 0 ·-g
~
(l.)
398.00 (J ~ H ::,
C/l
(J "{i 397.00 s 0 . ..,
::: (l.) -0
396.00 0...
!:,
"ii, ;;:
"O :::
395.00 ::,
0 H
I 0
394.00
393.00
,!. " 2
I
n
D DEEP MONITORING WELL
I MW-47: Groundwater Chemical of Concern Concentrations vs. Time
North Carolina State University
m Lot 86 Site
Raleigh, North Carolina
I 50 Legend 406.00
/ ,»\ Chloroform
/ \ "v ---"?--Groundwater surface
I 45 \ 405.00 \
\
\ ~ I 40 \ Cl
\ 404.00 6
\ z ~ \ ¢: I 35 \ ~
C: ;:, \ 403.00 0 ~ ·.c C: \ "' 0 _§ I ·1a 30 b \ 1-l-l
C: \ 0)
Q) 402.00 u u \, <!:l C: ... I 0 I ;:, u 25 C/l u I u
0 1; u I 401.00 a I ... 0 0) 20 "' ·.c C: ::! Q) -"O 0
I C: 400.00 p.. ;:, ... 0 Q) ... 15 "' 0 I / '\ ::!
v'\ ,» "O I ? C: \.,.-v> I 399.00 ;:, \ 0 10 ...
0
_,.,..♦ ' I I 398.00 5 I
I I '\
0 397.00 7711111111 I 11111111 :1 " " "' "' so so r--r--00 00 °' °' 0 0 0 0 0 0 0 0 0 0 0 9 0 0 6 ' ' u ' ' ' u 6 ' ' 6 ' 6
I
" C: C: " § " C: " " " " " " " " " " " " " " " " ~ Cl ~ Cl ~ Cl ~ Cl ~ Cl ~ Cl ~ Cl ~
I Date
Note: non-detected concentrations are plotted at one-half of the detection limit.
I