NCD095458527_20001110_FCX Inc. (Statesville)_FRBCERCLA SPD_June 2000 Sampling for Monitored Natural Attenuation OU-3-OCR

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June 2000 Sampling for
Monitored Natural Attenuation at
FCX-Statesville Superfund Site OU3
Statesville, North Carolina
prepared for
EI Paso Energy Corporation
1001 Louisiana Street
Houston, Texas 77002
November 2000
27-60313.015
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Environmental Engineering & Consulting
227 French Landing Drive
Suite 500
Nashville, TN 37228-1605
Tel: [phone]
Fax: [phone]
November 10, 2000
Mr. Roger Towe
El Paso Energy Corporation
1001 Louisiana Street
Houston, TX 77002
27-60313.015
RE: Results of June 2000 Sampling for Monitored Natural Attenuation at
Operable Unit Three (OU3) of the FCX-Statesville Superfund Site
Dear Roger:
The Record of Decision (ROD) for Operable Unit Three (OU3) at the FCX-
Statesville Superfund Site (the Site) includes monitored natural attenuation (MNA) as
part of the remedy in addition to active source control. Currently, the MNA includes
semiannual groundwater sampling of selected wells for specific parameters as
described in the Pre-Final Remedial Design Report ["Pre-Final Remedial Design
Report for Operable Unit Three (OU3), FCX-Statesville Superfund Site, Statesville,
North Carolina" dated September 1999 by Brown and Caldwell]. The primary
constituent of concern in OU3 is tetrachloroethene, also referred to as
perchloroethene (PCE).
1bis letter report presents the results of the fourth comprehensive round of MNA
sampling that took place in June 2000. The first MNA sampling event took place in
December 1998 and included some limited sampling in January 1999. These results
were reported in the pre-design investigation (PDI) report ("Pre-Design
Investigation Report for Operable Unit Three (OU3), FCX-Statesville Superfund
Site, Statesville, North Carolina" dated March 1999 by Brown and Caldwell). The
results of the second comprehensive round of sampling, which occurred in June
1999, were presented and discussed in a letter report dated December 2, 1999; the
results of the third comprehensive round of sampling, which occurred in December
1999, were presented and discussed in a letter report dated June 14, 2000. Following
is a brief description of the June 2000 sampling, a compilation of the sampling
results, an evaluation of the plume stability, the scoring results for natural
attenuation, and conclusions.
DESCRIPTION OF SAMPLING
Sampling of monitoring wells for groundwater quality, including analysis for volatile
organic compounds (VOCs) and metals designated by the United States
Environmental Agency (USEP A) and analysis for MNA parameters, was conducted
during the period June 5 through June 9, 2000. The wells sampled are listed in
Table 1. One well listed in the work plan was not sampled during the June 2000
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Mr. Roger Towe
November 10, 2000
Page 2
sampling event because of inaccessibility and one well was not sampled because of
the low water table level that occurred during that period. Two other wells were
purged with a bailer (rather that the prescribed slow-purge technique with a pump)
because of the low water table level. These two wells were analyzed for a limited
number of parameters due to the limited volume of groundwater recovered. These
wells are indicated by footnotes in Table 1. The monitoring wells associated with
OU3 are shown in Figure 1. Figures 2 and 3 show the shallow and intermediate
isoconcentration contours, respectively, for PCE based on the June 2000 sampling
data.
The protocols for sampling are the same as previously used including slow-purge
techniques. Details of the sampling method are described in the document entitled
"Remedial Design Work Plan for Operable Unit Three (OU3), FCX-Statesville
Superfund Site, Statesville, North Carolina" dated July 1998 by
ECKENFELDER INC. (now Brown and Caldwell). A summary of the chemical
analyses and analytical method references are listed in Table 2.
As discussed in the PDI report, the primary constituents of concern in OU3 are
PCE and its degradation products. Additionally, three metals, iron, manganese, and
aluminum were previously identified as exceeding regulatory levels and are included
in the sampling plan, as are Voes and parameters relevant to natural attenuation.
SAMPLING RESULTS
The sampling results for the wells used for MNA are presented in Table 3. This
table presents results from the December 1998, January 1999, June 1999, December
1999, and June 2000 sampling and from the previous sampling events from these
wells. Table 3 presents the data in the following order: the Voe results, aluminum
results, and bioparameter results, which include iron and manganese. The first five
columns of the table provide monitoring well identification and information
including sampling dates. The voe data are organized with the first four columns
containing PCE and its degradation ( or daughter) products: trichloroethene (TCE),
cis-1,2-dichloroethene (cis-1,2-DCE), and vinyl chloride (VC). The remaining
columns of voe data are organized in alphabetical order. The bioparameter data
are grouped into the following four categories: electron acceptors, products of
degradation (including PCE daughter product ethene), nutrients, and geochemical
parameters.
The following summarizes the PCE data according to direction from the source
(north and south) and by depth (shallow and intermediate):
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Mr. Roger Towe
November 10, 2000
Page 3
Source Area. The PCE concentrations from well W-17s have ranged from
42,000 µg/L to 110,000 µg/L. The two most recent samples were obtained with a
bailed sample rather than by the slow-purge method. The range of concentrations is
within that often observed for source areas and suggests that there has been no trend
over the last two years. This well is located within the area to be treated by air
sparging/ soil vapor extraction (AS/SVE).
South Area of Shallow Zone. The PCE concentrations have remained very
constant at 190 µg/L to 220 µg/L in W-5s and less than 2.0 µg/L in the farthest
downgradient well, W-24s .. The PCE concentration from well W-22s had ranged
from 3.6 µg/L to 11 µg/L and was 5.8 µg/L during the latest round of sampling.
There appears to be no trend in this area of the shallow groundwater zone.
South Area of Intermediate Zone. The PCE concentrations have ranged between
25 µg/L and 76 µg/L in W-5i (a possible small upward trend may exist but is not
clearly distinguished from normal variability); have decreased in W-22i from
170 µg/L to 65 µg/L ( only a factor of two which cannot be viewed as trend); varied
between 15 µg/L and 60 µg/L in W-291; and have varied from 0.26 µg/L to
0.95 µg/L at the farthest downgradient well, W-32i, and was 0.59 µg/L during the
latest round of sampling. Because of the low concentrations, no trend can be
identified.
North Area of Shallow Zone. The PCE concentrations have trended upwards in
W-19s from 26 µg/L to 620 µg/L; had trended upward from 3 µg/L to 48 µg/L in
W-20s and is now 35 µg/L; and have remained less than 1.0 µg/L in W-3 ls, the
farthest downgradient well. ·
North Area of Intermediate Zone. The PCE concentrations have fluctuated
between 170 µg/L and 640 µg/L in W-28i and was 580 µg/L during the latest round
of sampling; trended upwards in W-30i from 500 µg/L to 1,200 µg/L for the
December 1999 sampling event but back down to 810 µg/L for the current sampling
event; have fluctuated between 230 µg/L and 1,100 µg/L in W-20i with the most
recent sample result, 230 µg/L, being nearly the same concentration as the
March 1996 sample; and have remained less than 1.0 µg/L in the farthest
downgradient well, W-31i, since it was first sampled in November 1998.
North Area of the Deep Zone. W-20d, installed in 1998, may be decreasing from a
September 1998 high of 34 µg/L to a most recent result of 1.7 µg/L.
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Mr. Roger Towe
November 10, 2000
Page 4
Background of Shallow Zone. The PCE concentrations remain less than 1.0 µg/L
in W-12s through April 1998 (no samples were collected in 1999 and June 2000) and
concentrations remain stable between 1.7 µg/L (December 1999) and 6.0 µg/L
(December 1995) in W-18s with the most recent result of 3.1 µg/L.
Background of Intermediate Zone. The PCE concentrations remain between
0.66 µg/L and 2 µg/L in W-lOi and between 1.3 µg/L and 3.0 µg/L in W-12i.
Summary of Historic Data. The PCE concentrations in most wells have remained
stable. Some wells have shown upward and downward fluctuations, generally, by a
factor of four or less. The exception may be the mid plume area to the north of the
apparent source. There may be an upward trend in this area but it is too early to be
certam.
EVALUATION OF PLUME STABILITY
Plume stability as a result of natural attenuation is evaluated using the primary
evidence, which is the groundwater voe data, and the secondary evidence, which is
the groundwater bioparameter data.
Primary Evidence from VOC Data
Inspection of the data in Table 3 for PCE and its daughter products reveals a
relatively stable plume from April 1994 through June 2000. For instance, over this
time the concentrations of PCE in W-5s located immediately south of the plant
building have ranged from 190 µg/L to 220 µg/L and in W-5i have fluctuated
between 25 µg/L and 76 µg/L. There is no clear long-term trend for either well.
The data from W-5i suggests that some variability in voe concentrations,
irrespective of any trends, should be anticipated. The relative changes observed to
date for Wl5i are less than the relative changes observed for some other wells where
there are no apparent trends. Continued monitoring is needed to determine if a
trend exists.
There has been minimal fluctuation and no significant trends in the background, side
gradient, south shallow, or south intermediate, or the north shallow and the
intermediate wells located farthest downgradient. It previously appeared that there
might be an upward trend in well W-17 s. The most recent data suggest that there
has been no real change from 1998 to 2000. W-17s is located in the source area,
which will be addressed through AS/SVE. There may have been an upward trend in
some of the north shallow and north intermediate wells located midway between the
source area and the farthest downgradient wells. The most recent data suggest a
leveling off of concentrations or that there are no long-term trends. The four wells
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Mr. Roger Towe
November 10, 2000
Page 5
located farthest downgradient continue to have PCE concentrations of less than
1.0 µg/L.
The daughter products of PCE (TCE, cis-1,2-DCE, trans-1,2-DCE, vinyl chloride,
and ethene) continue to be present. The daughter product concentrations remain
essentially constant relative to PCE concentrations. In W-Ss, the concentration of
cis-1,2-DCE continues to exceed the concentration of its parent compound(s).
Other VOCs including 1,1,1-trichloroethane (1,1,1-TCA), 1,1,2-trichloroethane
(1,1,2-TCA) and the apparent degradation products 1,1-dichloroethane (1,1-DCA),
1,2-dichloroethane (1,2-DCA), and 1,1-dichloroethene (1,1-DCE) are present in a
few wells at relatively constant low levels. In a few cases, compounds reported to be
present in the December 1998 samples at concentrations barely exceeding detection
limits were reported as not detected for the June 1999 and December 1999 sampling
events. Except for samples obtained from W-Ss, the concentrations of these
compounds remained below 10 µg/L.
Secondary Evidence from Bioparameter Data
The groundwater quality data with respect to plume stability and the presence of
daughter products represent the primary lines of evidence that natural attenuation is
taking place. In addition to the primary evidence, secondary evidence for the
occurrence of natural attenuation is provided by the bioparameter data in the form
of electron acceptors, products of degradation (in addition to the VOC daughter
products discussed earlier), nutrients, and geochemical parameters. These data
provide indirect evidence of reductive dechlorination except for ethene, ethane, and
chloride, which are degradation products. The presence of ethene and ethane is
direct evidence of reductive dechlorination. These bioparameter data also provide
evidence of whether groundwater conditions are favorable for the continued
occurrence of reductive dechlorination. The data for this second type of parameters
are also presented in Table 3.
This is only the fourth comprehensive MNA sampling event and thus any trends
apparent in these data might actually reflect normal variability. Generally, the values
obtained from the June 2000 sampling event are similar to the values obtained from
the previous MNA sampling events. Total metals, aluminum, iron, and manganese
either increased or decreased in some wells. For these wells, concentrations of all
three metals decreased by approximately the same relative amounts. This may reflect
variations in the amount of suspended fines in the samples rather than changes in
conditions. Reported dissolved oxygen (DO) concentrations have either remained
constant or trended downwards. This may reflect refinements in the sampling
process or actual trends. The volatile fatty acid results for the June 1999 sampling
event were largely suspect and are not reported in Table 3. Note that the June 2000
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Mr. Roger Towe
November 10, 2000
Page 6
volatile fatty acid data are generally consistent with the 1998 data. The detection
limits for the June 2000 volatile fatty acid data are higher than what was reported in
the past, preventing a direct comparison of wells with low concentrations of volatile
fatty acids. In a few cases the reported values for the soluble gases, methane, ethene,
and ethane, either increased or decreased substantially. Since these gases can be
easily lost during sampling, the higher of the concentrations for each well might be
more likely to represent field conditions; however, no conclusions regarding trends
in these parameters can be drawn until more data are obtained.
Overall, we see no significant trends in the bioparameter data.
SCORING RESULTS FOR NATURAL ATTENUATION USING US EPA
PROTOCOL
The VOC and bioparameter results have been used to score the OU3 monitoring
wells according to the USEPA Protocol (EPA/600/R-98/128, September 1998) as
another method of evaluating MNA. The weighting system (point assignment) used
for the December 1998/January 1999 sampling event has been replaced by this
USEP A protocol, which contains some modifications from the previous version
used for the December 1998/January 1999 sampling event (proposed protocol by
the U.S. Air Force Center for Environmental Excellence). Table 4 contains the most
recent point assignment system. The major differences from the point assignment
system that was previouslyused for the December 1998/January 1999 sampling
event (refer to the PDI report) are that points are now subtracted if the pH is outside
the optimal range and points are no longer awarded for the presence of 1,1-DCE as
a daughter product of 1,1,1-TCA. The latter change was made because 1,1-DCE is a
chemical degradation product rather than a biological degradation product of 1, 1, 1-
TCA. Following discussions with Dr. John T. Wilson of the USEPA we have
included a credit forthe presence of 1,1-DCE in the point assignment system
because 1,1-DCE does provide evidence of natural attenuation degradation
mechanisms, although not reductive dechlorination.
The total points awarded (scores) for the individual wells were recalculated for the
December 1998/January 1999 sampling event so that all sampling events for MNA
parameters will have been evaluated using the same point scoring protocol. Tables 5,
6, 7, and 8 show the results of the point assignment for the December 1998/January
1999, June 1999, December 1999, and June 2000 sampling events, respectively. As a
result of the revisions, some point totals have changed for the two earliest sampling
events, largely because the new protocol subtracts 2 points for pH values less than
5.0 or more than 10.0. However, in most cases where points were subtracted for pH
values less than 5.0, the values were only a few tenths of a pH unit below 5.0. These
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Mr. Roger Towe
November 10, 2000
Page 7
lower pH values were quite similar to the pH values reported for the background
wells.
Point totals for the first sampling event have changed because the table initially
contained a mix of data from the June 1998 sampling event as well as the December
1998/Januaiy 1999 sampling event.
There are some differences in assigned point values among the point totals for the
different sampling events. The differences reflect a number of factors:
• In some cases one or more parameters were not measured and thus points
could not be assigned for those particular parameters.
• In some cases relatively small changes in parameter values for wells being
scored resulted in significant changes in points awarded (e.g., DO values of
0.4 mg/L versus 0.6 mg/L correspond to points awarded of 3 versus 0,
respectively). Also, small changes in parameter values for the background
well can affect points awarded for chloride, carbon dioxide, and alkalinity.
• In several wells where VOC concentrations were near the detection limit,
individual VOCs were pres~nt marginally above the detection limit for one
sampling event but not another.
In particular, the variability in point totals for W-28i reflects the sum of small
changes in DO and that the daughter product concentrations are similar to their
detection limits.
Some wells received a relatively low number of ranking points because they were
downgradient or near the downgradient edge of the plume. Furthermore, the
differences between the concentrations of chloride, carbon dioxide, and alkalinity in
the background well for the shallow zone and the background well for the
intermediate zone had an impact on the point totals.
The interpretation guide continues to suggest that the data provide limited to
adequate evidence of natural attenuation. Table 9 provides guidance from the
USEPA protocol for interpreting the total points awarded (scores) for the wells.
Because the ranking table is intended as a screening tool and the data used in the
ranking process show little or no change over time, there is little value in continuing
the use of the ranking process for OU3.
\\BCNSH03\PROJECTS\PROJ\603 I 3.01 S\ljune-OO.d0<:
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Mr. Roger Towe
November 10, 2000
Page 8
CONCLUSIONS
The following conclusions can be drawn from the current and historical data:
• There has been no consistent upward trend in the PCE concentrations in
the source area well W-17s during the period of 1998 to 2000. This area
will be addressed by AS/SVE.
• Generally, the plume is undergoing little change; the north plume area
midway between the apparent source area (W-17) and the downgradient
extent of the plume may be the exception. For the latter, the PCE
concentrations are low and thus it is harder to establish any trends.
• Primary evidence of the biodegradation component of natural attenuation
(the presence of daughter products and a relatively stable plume) remains
unchanged from previous sampling events. The most recent data suggest
that trends are less likely in some wells than appeared to be the case
previously.
• The secondary evidence (bioparameter data) remains about the same and is
generally supportive of the occurrence of reductive dechlorination.
• Changes in ranking point totals reflect modifications to the protocol, small
differences in analytical results between sampling events, small changes in
detection limits, and a few suspect analyses. Continued use of the ranking
system for OU3 does not appear to be beneficial.
• Results from subsequent sampling events should continue to be evaluated
to identify trends that may develop. To date, trends have been difficult to
identify because of the relatively small data set for some monitoring wells
(six to eight sets of groundwater data are typically reqwred to establish a
trend). Also, trends have been difficult to identify because small changes in
some parameters are difficult to distinguish from normal variability in the
data, particularly for VOC data when the concentrations are low
(i.e., approaching the detection limit). Overall, there appear to be few
trends in the data. A steady-state plume suggested by the lack of trends is
an indication of natural attenuation.
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Mr. Roger Towe
November 10, 2000
Page9
Please call Bob Norris at [phone] or Ken Oma at [phone] if you have
any questions or comments regarding this letter report.
Sincerely,
BROWN AND CALDWELL·
-/1 ,f / •. ")'Jf / /
,,?:'/ ?f rti'"'V // e(y/... rf,L.
Robert D. Norris, Ph.D.
Technical Director
In-Situ Remediation
cc: K. Mallary, EPA Region 4
N. Testerman, NCDENR
S. Miller, El Paso
J. Porter, The Porter Law Group
N. Prince, ESC
\\BCNSH0J\PROJECTS\PROJ\603 13 .0 I S\!june.00.doc
Kenton H. Oma, P.E.
Assistant Technical Director
Design & Solid Waste
H. Mitchell, Jr., Beaunit
M. 'Garlick, Burlington
B. Wicker, Burlington
G. House, BPMH&L
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Table 1. Monitoring Wells Selected for Semiannual Groundwater Sampling,
FCX-Statesville Superfund Site OU3
Groundwater Zone
Shallow:
Intermediate:
Deep:
Monitoring Well"
W-5s
W-12s•·c
W-17s'
W-18s0
W-19s
W-20s
W-22s'
W-24s
W-31s
W-Si
w-1rn•
W-12i0
W-20i
W-22i0
W-28i
W-29i
W-30i
W-31i
W-32i
W-20d
"The analytical methods for the analyses of groundwater samples are given in Table 2.
0Natural attenuation background well. .
°Well was not sampled because of low water level or dryness.
'Bailer was used to purge well. Well was sampled for a limited list of parameters due to low
water level.
"Well was not sampled due to inaccessibility.
\\BCNSH03\PROJECTS\PROJ\60313.01 5~une-00-t01.doc Page 1 of 1
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0 0 ,,,
II
w --' <)
<Jl
f-0 --' Q_
0 0 '-,,,
0 '--w
';,
0
I U1
I ,,, ,,,
0 <O
0 z
"' z
i 0: 0
Legend
-$-Shallow Monitoring Well Location
~ Intermediate Monitoring Well Location
♦ Deep Monitoring Well Location
FIGURE 1
MONITORING WELL
LOCATION MAP
FCX-STATESVILLE SUPERFUN
60313.015 STATESVILLE, NORTH c.&o~~~ OU3 10/99
BROWN AND
CALDWELL Nashville, TenneSllee
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0 0 ,,,
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0 0 '-,,,
0 '--w ~ .,
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0 "'
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j
Legend
-$-· Shallow Monitoring Well Location
~
♦
Intermediate Monitoring Well Location
Deep Monitoring Well Location
-10-Groundwater lsoconcentrotion Contour
[ X l
( X )
PCE Results In (ppb) from June 2000
Monitored Moturol Attenuation (MNA) Sampling
PCE Results in (ppb) from Remedial
Investigation (RI) or Pre-Design Investigation (POI)
FIGURE 2
ISOCONCENTRA TION MAP FOR
PCE IN SHALLOW GROUNDWATER
FCX-STATE~LLE SUPERFUND SITE, OU3
STATE~LLE, NORTH CAROLINA
30~0§f~EE::IOE===~3~0~0===~600 60313.015
1
0/99
SCALE BR OWN AND FEET CALDWELL Nashville, Tenne11see
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I 0
0 "' II -I w _,
< u (/)
>--
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a.
0 0
-----I n 0
------w
I ~ 0
<11
I <11
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ci
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'-' z
! "' I 0
SCALE
Legend
Shallow Monitoring Well Location
Intermediate Monitoring Well Location
Deep Monitoring Well Location
-10 -Groundwater lsoconcentrotion Contour
[ X l
( X )
PCE Results in (ppb] from June 2000
Monitored natural Attenuation (MNA) Sampling
PCE Results in (ppb) from Remedial
lnvestigotion (RI) or Pre-Design Investigation (PDI)
FIGURE 3
ISOCONCENTRATION MAP FOR
PCE IN INTERMEDIATE GROUNDWATER
FCX-STATESVILLE SUPERFUND SITE, OU3
STATESVILLE, NORTH CAROLINA
60313.015 10/99
BROWN AND
CALDWELL Nashville, T,nnmee
-------------------Table 2. Summary of Chemical Analyses and Analytical Method References for Semiannual Groundwater Sampling,
FCX-Statesville Superfund Site OU3
Sample Evaluation Chemical Test/Analyte Parameter Analytical Reference Methoda DQO Levelb
Field Measurements:
Laboratory Analyses:
Carbon dioxide
Iron (II)
Manganese (II)
Sulfide
Conductivity
Oxidation-reduction potential (ORP)
pH
Dissolved oxygen (DO)
Temperature
Chloride
Iron (total)
Manganese (total)
Aluminum (total)
Nitrate/nitrite
Sulfate
Ethane, ethene, and methanee
TCL voes
Alkalinity ( carbonate/bicarbonate if
Dissolved total organic carbon (TOG)
Volatile fatty acids
Hach Kitc
Hach KitC
Hach KitC
Hach Ki!C
ASTM Method D-1125-82
ASTM Method D-1498-76
ASTM Method D-1293-84
CHEMETRICS Kitc
NAd
USEPA Method 325.2
Aquaterra QAPP Table 3
Aquaterra QAPP Table 3
Aquaterra QAPP Table 3
USEPA Method 353.2
USEPA Method 375.4/9038
USEPA Method 8015-Modified
Aquaterra QAPP Table 2
Standard Methods 2320B
USEPA Method 415.1
Standard Methods 5560C
Ill
IV
IV
IV
Ill
111
Ill
IV
111
111
Ill
asample preservatives, when required by the method, will be added to sample containers at the analytical laboratory prior to sampling. Contract
Required Detection Limits (CRDLs) will be according to the contract laboratory procedure (CLP) methods referenced in the Aquaterra QAPP
Tables 2 and 3.
bDQOs (Data Quality Objectives) and QNQC frequencies per "Environmental Investigations Standard Operating Procedures and Quality
Assurance Manual", May 1996, USEPA Region 4. Level I= Field Screening; Level II= Field Analyses; Level Ill= Screening Data with Definitive
Confirmation; Level IV = Definitive Data.
CMethod will be per manufacture's procedures.
dNot Applicable.
eAnalysis will be subcontracted to Microseeps Incorporated, Pittsburgh, Pennsylvania.
!samples to be collected in zero headspace containers to prevent exchange of carbon dioxide between the samples and the atmosphere.
P:\PROJ\60313.015\june-00-t02.doc Page 1 of 1
--- ---.. ------.. - - ---Table 3. Data from Monitoring Wells Used for Evaluation of Monitored Natural Attenuation 10127100
FCX-Statesville Superfund Site OU3
Well Information Volatile Organic Compounds
e CIS-, -
Monitoring Screened Sampling T etrachloro-Trichloro-Dichiaro-Carbon Chiaro-1, 1-Dichloro-
Well Zone Well Type Depth Date ethene ethene · ethene Vinyl chlonde Acetone Benzene disulfide Chloroform methane ethane
(ft) (µg/L) (µg/L) (µg/L) (µg/L) (µg/L) (µg/L) (µg/L) (µg/L) (µg/L) (µg/L)
W-1s Side Gradient Shallow 38-48 12119/98 140DJ 0.7 DJ 1.0 U 5.0 UD NR' 5.0UD 5.0UD 1.0JD 5.0 U 5.0UD
W-5s South Plume Shallow 32-42 4/1/94 200 38J 1,000 sou 530 U 50 U 50 U 50 U sou 430
W-5s South Plume Shallow 32-42 1011/94 190 38J 1,000 sou 250 U 50 U 50 U 50 U 50 U 380
W-5s South Plume Shallow 32-42 4/30/98 200 DJ 55 J 1,300 DJ 8.2 J 61 UJ 2.9 J 5.0 UJ 2.2 J 5.0UJ 340 DJ
W-5s South Plume Shallow 32-42 12117/98 200 UJ 53 J 1,600J 50J NR 200 UJ 200UJ 200 UJ 200 UJ 270J
W-5s1 South Plume Shallow 32-42 6/9/99 190 D 57 JD 1100 D 100 UD 500UJ 100 UD 100UD 100UD 100 UD 240 D
W-5s South Plume Shallow 32-42 1217/99 220 D 75 JD 1,100 D 100 UD 500UD 100 UD 100UD 100 UD 100 UD 280D
W-5s Dup South Plume Shallow 32-42 12117/99 200 D 670 1,600 D 26 DJ NR 4JD 50UD 50 UD 50 UD 2900
W-5s South Plume Shallow 32-42 6/6/00 190 D SOJO 1100 D 100 UD 500 UD 100 uo 100 uo 100 UD 100 UD 220 D
W-5i South Plume Intermediate 56-66 1011/94 25 2.0J 11 10 U 50 U 10 U 10 U 2.0 J 10 U 5J
W-5i South Plume Intermediate 56-66 515/98 49D 4.9 DJ 4 DJ 5.0UD 25 UD 5.0UD 5.0 UD 5.0UD 5.0UD 3.3 DJ
W-5i South Plume Intermediate 56-66 12119/98 28 D 4 10J 0.3 J NR 1.0 U 1.0U 0.06J 1.0UJ 5J
W-5i South Plume Intermediate 56-66 6/8/99 48D 4.6 D 6.9 D 2.0 UD 10 UJ 2.0 UD 1.0 JD 2.0UD 2.0 UD 4.5 D
W-5i South Plume Intermediate 56-66 1218/99 55D 6.5 D 9.9 D 5.0 UD 25 UD 5.0 UD 5.0 UD 5.0UD 5.0 UD 8.10
W•5i South Plume Intermediate 56-66 6/9/00 730 6.7 D 12 D 5.0UD 25UD 5.0 uo 5.0 UD 5.0 uo 5.0 UD 8.0 D
W•5iDup South Plume Intermediate 56-66 6/9/00 76 D 6.40 12 D 5.0UD 25 UD 5.0 UD 5.0 UD 5.0 UD 5.0 UD 8.1 D
W-6s Side Gradient Shallow 22-37 4/30/98
W-6s Dup Side Gradient Shallow 22-37 4/30/98
W-6i Side Gradient Intermediate 83-93 12116/98 75 J 4 3 0.09 J 44 J 0.08J 0.5 J 1.0U 0.2 J
W-9s Treatment Shallow 34-49 5/5/98 3,100 D 14 D 1.9 DJ 10 UD 50UD 10 UD 10 UD 2.1 DJ 10 UD 10UD
W-9s Dup Treatment Shallow 34-49 515/98 3,200 D 13 D 2 DJ 10 UD 50UD 10 UD 10UD 2.2 DJ 10 UD 10UD
W-9s Treatment Shallow 34-49 12117/98 6,000 D 24 DJ 200UD 200 UD NR 200 UD 200 UD 200 UD 200U 200 UD
W-10i Side Gradient Intermediate 59-69 1011/94 1.0U 1.0U 1.0 U 1.0 U 11.0 U 1.0U 1.0U 1.0U 1.0U 1.0U
W-10i Side Gradient Intermediate 59-69 111/95 0.9 J 0.2 J 1.0 U 1.0U 6.0 U 1.0U 1.0 U 1.0U 1.0U 1.0U
W-10i Side Gradient Intermediate 59-69 1211/95 0.9 J 2 0.2 J 1.0U BU 1.0U 1 0.2 J 0.2 J 1.0U
W-10i Side Gradient Intermediate 59-69 4130/98 0.66J 1.0U 1.0 U 1.0 U 5.0 U 1.0U 1.0U 1.0U 1.0U 1.0U
W-10i Side Gradient Intermediate 59-69 12119/98 2 1.0U 1.0 UJ 1.0 U NR 1.0UJ 1.0 U 1.0U 1.0U 1.0U
W-10i Side Gradient Intermediate 59-69 618199 1.8 1.0 U 1.0 U 1.0U 5.0 U 1.0U 24 D 1.0 U 1.0U 1.0U
W-10i Side Gradient Intermediate 59-69 12/9/99 1.1 1.0U 1.0U 1.0 U 5.0 U 10U 1.0 U 1.0U 1.0U 1.0U
W-10i Side Gradient Intermediate 59-69 6/6100 0.81J 1.0 U 1.0 U 1.0 U 5.0 U 1.0 U 0.35J 1.0 U 1.0 U 1.0 U
P:\Proj\60313. 01 S~une-0O-t03.xls Page 1 of 26
--.. ... ------ --- ---- --Table 3. Data from Monitoring Wells Used for Evaluation of Monitored Natural Attenuation 10/27/00
FCX-Statesville Superfund Site OU3
Well Information Volatile Organic Compounds
e CIS-, -
Monitoring Screened Sampling T etrachloro-Tnchloro-Dichiaro-Carbon Chloro-1, 1-Dichloro-
Well Zone Well Type Deplh Dale ethene ethene ethene Vinyl chloride Acetone Benzene disulfide Chloroform methane ethane
(ft) (µg/1.) (µg/1.) (µg/1.) (µg/1.) (µg/1.) (µg/1.) (µg/1.) (µg/1.) (µg/1.) (µg/1.)
W-11s Side Gradient Shallow 25--40 4/30198
W-12s Background Shallow 16-33 10/1194 1.0 U 1.0U 1.0 U 1.0U 5.0 U 1.0U 1.0U 1.0U 1.0U 1.0 U
W-12s Background Shallow 18-33 1/1195 1.0 U 1.0U 1.0 U 1.0 U 5.0 U 1.0U 1.0U 0.1 J 1.0U 1.0 U
W-12s Background Shallow 16-33 4/30198 1.0 U 1.0 U 1.0 U 1.0U 5.0 U 1.0U 1.0 U 1.0 U 1.0U 1.0 U
W-12s Background Shallow 18-33 12/8199
W-12i Background Intermediate 73-83 10/1194 3.0 1.0 U 1.0U 1.0 U 5.0 U 1.0 U 1.0U 1.0U 1.0U 0.3 J
W-12i Background Intermediate 73-83 1/1/95 2.0 1.0 0.1 J 1.0U 6.0U 1.0 U 4.0 0.1 J 1.0U 0.4 J
W-12i Background Intermediate 73-83 4/30/96 1.5 1.0U 1.0U 1.0U 310 DJ 1.0 U 0.39J 0.14J 1.0U 1.0U
W-12i Background Intermediate 73-83 12/16198 2J 1.0U 1.0 U 1.0U NR 0.04 J 0.05 J 0.3 J 1.0U 0.5 J
W-12i Background Intermediate 73-83 61//99 2.5 1.0 U 1.0U 1.0U 5.0 U 1.0 U 1.0 U 0.35 J 1.0U 0.50J
W-12i Background Intermediate 73-83 12/9199 2.2 1.0U 1.0 U 1.0 U 5.0 U 1.0U 1.0U 1.0 U 1.0 U 0.59J
W-12i Background lntennediate 73-63 6/7/00 1.3 1.0 U 1.0 U 1.0 U 5.0 U 0.46J 0.74J 1.0 U 1.0 U 1.0 U
W-16s Treatment Shallow 35-50 5/5/98
W-16s Treatment Shallow 35-50 12/17198 2,300 D 40 DJ 200UD 200 UD NR 200 UD 200 UD 25 DJ 200 UD 200 UD
W-16i Treatment Intermediate 77-87 5/5198
W-16i Treatment Intermediate 77-87 12/17/98 1,000 D 26D 16 D 2.0 UD NR 2.0 UD 2.0UD 40 D 2.0 U 2.0 UD
W-17s Source Shallow 29.5-44.5 10/1/94 42,000 4,ooo u· 430 J 4,000 U 20,000 U 4,000 U 4,000 U 4,000 U 4,000 U 4,000 U
W-17s Source Shallow 29.5-44.5 1/1195 57,000 480 J 880 J 4,000 U 20,000 U 4,000 U 4,000 U 4,000 U 4,000 U 4,000 U
W-17s Source Shallow 29.5--44.5 5/5/98 84,000 D 410 D 720 D 250 UD 1,200 UD 250 UD 250 UD 110 DJ 250 UD 250UD
W-17s Source Shallow 29.5-44.5 12/18198 72,000 D 10,000 UD 10,000 UD 10,000 UD NR 10,000 UD 10,000 UD 10,000 UD 10,000 UD 10,000 UD
W-17s' Source Shallow 29.5-44.5 12/9199 110,000 D 5,000 UD 510 JD 5,000 UD 25,000 UD 5,000 UD 5,000 UD 5,000 UD 5,000 UD 5,000 UD
W-17s Source Shallow 29.5-44.5 6/6/00 70,000 D 10,000 UD 1,000 JD 10,000 UD 50,000 UD 10,000 UD 10,000 UD 10,000 UD 10,000 UD 10,000 UD
W-18s Background Shallow 22.5-37.5 12/1/95 6 6 0.8 J 1.0U 5U 1.0U 1.0 U 0.6J 1.0 U 1.0 U
W-18s Background Shallow 22.5-37.5 4/30198 3.5 1.0U 1.0 U 1.0 U 6.0 U 1.0 U 1.0 U 1.0U 1.0 U 1.0 U
W-18s Background Shallow 22.5-37.5 12/16198 4J 1.0 U 1.0 U 1.0U NR 1.0 U 1.0 U 1.0U 1.0U 1.0 U
W-18s Background Shallow 22.5-37.5 6/8199 3.8 1.0U 1.0 U 1.0 U 5.0 U 1.0 U 1.0 U 1.0U 1.0U 1.0 U
W-18s Background Shallow 22.5-37.5 12/6/99 1.7 1.0U 1.0U 1.0 U 5.0 U 1.0U 1.0 U 1.0U 1.0 U 1.0 U
W-18s Background Shallow 22.5-37.5 6/6/00 3.1 1.0 U 1.0 U 1.0 U 5.0 U 1.0 U 1.0 U 1.0U 1.0U 1.0 U
P:\Proj\60313.015\june-00.103.xls Page 2 of 26
- ------------- --- --Table 3. Data from Monitoring Wells Used for Evaluation of Monitored Natural Attenuation 10/27/00
FCX-Statesville Superfund Site OU3
Well lnfonnatlon Volatile Organic Compounds
e CIS-I -
Monitoring Screened Sampling T etrachloro-Trichloro-Dichiaro-Carbon Chiaro-1, 1-Dichloro-
Well Zone Well Type Depth Date ethene ethene ethene Vinyl chloride Acetone Benzene disulfide Chlorofonn methane ethane
(ft) (µg/L) (µg/L) (µg/L) (µg/L) (µg/L) (µg/L) (µg/L) (µg/L) (µg/L) (µg/L)
W-19s North Plume Shallow 17-27 1211/95 26 4 1 J 2.0U 10U 2.0 U 0.4J 0.3 J 2.0 U 2.0 U
W-19s North Plume Shallow 17-27 5/5/98 26 D 1.2 DJ 0.82 DJ 2.5UD 12UD 2.5 UD 2.5UD 0.56 DJ 2.5 UD 2.5 UD
W-19s North Plume Shallow 17-27 12/17/98 250J 5 4.0 U 1.0U NR 1.0U 1.0 U 1.0 J 1.0U 1.0 U
W-19s North Plume Shallow 17-27 6/10/99 330 D 7.4 JD 10 UD 20 UD NR 20 UD 20UD 20 UD 20UD 20UD
W-19s North Plume Shallow 17-27 12/7/99 420 D 11 JD 22 D 20UD 100UD 20UD 20UD 20UD 20 UD 20 UD
W-19s North Plume Shallow 17-27 6/6/00 620 D 13 D 25 D 5.0 UD 25UD 5.0 UD 5.0UD 5.0 UD 5.0UD 5.0UD
W-20s North Plume Shallow 4-14 12/1/95 3 0.5 J 0.8 J 1.0U 7U 1.0 U 1.0 U 0.2 J 1.0U 1 U
W-20s North Plume Shallow 4-14 4/29/98 20 0.89J 3.4 1.0 U 5.0U 1.0 U 1.0 U 0.23J 1.0U 1.0U
W-20s Dup North Plume Shallow 4-14 4/29/98 17 0.8 J 3.1 1.0U 5.0 U 1.0 U 1.0 U 0.21 J 1.0 U 1.0U
W-20s North Plume Shallow 4-14 12120/98 27DJ 1 4J 1.0U NR 1.0 U 1.0 U 0.2 J 1.0U 1.0 U
W-20s North Plume Shallow 4-14 6/8/99 46D 1.9JD 5.1 D 2.0 UD 10UD 2.0 UD 2.0UD 2.0 UD 2.0UD 2.0 UD
W-20s North Plume Shallow 4-14 12/7/99 40D 2.9 D 8.4 D 2.0UD 10 UD 2.0 UD 2.0UD 2.0 UD 2.0UD 2.0 UD
W-20s Dup North Plume Shallow 4-14 12/7/99 42 D 3.10 8.3 D 2.0 UD 10UD 2.0 UD 2.0 UD 2.0UD 2.0 UD 2.0UD
W-20s North Plume Shallow 4-14 6/8/00 350 1.3JD 4.8JD 5.0 UD 25UD 5.0UD 5.0 uo 5.0UD 5.0UD 5.0 UD
W-20s Dup North Plume Shallow 4-14 6/8/00 31 D 1.8 5.6 1.0 U 5.0 U 1.0 U 1.0 U 1.0 U 1.0 U 1.0U
W-20i North Plume Intermediate 84-94 3/1/96 240 13 J 29 20 U 100 U 20 U 20 U 20 U 20 U 20 U
W-20i North Plume Intermediate 84-94 4/29/98 310DJ 18 JD 25 J 2.0UJ 10 UJ 2.0UJ 0.48 J 0.77 J 2.0 UJ 2.0 UJ
W-20i North Plume lntennediate 84-94 12/15/98 1,100 D 75 D 120 D 50UD NR 50 UD 14 DJ 5JD 50 UD 50 UD
W-20i North Plume Intermediate 84-94 1/26/99 450D 34 D 29 D 1.0 U 5.0 U 0.08J 1.0 U 1 1.0 U 0.3 J
W-20i North Plume Intermediate 84-94 1/27/99 380D 29 D 24 D 20 UD 100UD 20 UD 20 UD 20 UD 20 U 20 UD
W-20i North Plume Intermediate 84-94 6/8/99 440D 30 JD 23 JD 50 UD 250 UD 50UD 50 UD 50 UD 50 UD 50UD
W-20i North Plume Intermediate 84-94 12/7/99 270D 25 JD 19 JD 50 UD 250 UD 50UD 50UD 50UD 50 UD 50UD
W-20i North Plume Intermediate 84-94 6/8/00 230 D 20 16 0.19 J 5.0 U 1.0 U 1.1 1.0 U 1.0U 1.0 U
W-20d' North Plume Deep 152-166 9/23/98 34 D 4.9 9.4 1.0U 22 1.0 U 1.0 U 0.50 U 1.0 U 1.0U
W-20d North Plume Deep 152-166 12117/98 12 J 2 0.02 J 1.0 U 12 J 0.o7J 1.0 U 1.0U 1.0 U 1.0U
W-20d North Plume Deep 152-166 6/9/99 4.3 2.0 1.2 1.0 U 8.4 1.0 U 1.0U 1.0U 1.0 U 1.0 U
W-20d North Plume Deep 152-166 1219/99 5.8 3.1 1.6 1.0U 13 1.0U 1.0 U 1.0 U 1.0U 1.0U
W-20d North Plume Deep 152-166 6/9/00 1.7 1.4 1.3 1.0 U 11 U 1.0 U 1.0 U 1.0 U 0.18 J 1.0 U
W-22s South Plume Shallow 20-35 1211/95 4 3 1 J 0.3 J 6U 1.0 U 1.0 U 0.3 J 1.0 U 0.7 J
W-22s Sou1h Plume Shallow 20-35 5/1/98 3.6 0.12 J 2.5 0.45J 5.0 U 1.0U 1.0U 1.0 U 1.0U 1.1
W-22s South Plume Shallow 20-35 12120/98 4 1.0 U 2J 0.4 J NR 1.0U 1.0 U 1.0U 0.1 J 0.6J
W-22s' South Plume Shallow 20-35 12/8/99 11 0.20 J 3.1 0.43 J 5.0 U 1.0 U 1.0U 1.0U 1.0U 1.0
W-22s South Plume Shallow 20-35 617/00 5.8 1.0 U 1.0 U 0.23J 5.0 U 1.0 U 1.0 U 1.0 U 1.0U 1.0 U
P:\Proj\60313. O 15\june-OO-to3.xls Page 3 of 26
- --------------- - --Table 3. Data from Monitoring Wells Used for Evaluation of Monitored Natural Attenuation 10/27/00
FCX-Statesville Superfund Site OU3
Well lnfonnation Volatile Organic Compounds
e CIS-, -
Monitoring Screened Sampling T etrachloro-Trichloro-Dichiaro-Carbon Chiaro-1.1-Dichloro-
Well Zone Well Type Depth Date ethene ethene ethene Vinyl chloride Acetone Benzene disulfide Chloroform methane ethane
(fl) (µg/L) (µg/L) (µg/L) (µg/L) (µg/L) (µg/L) (µg/L) (µg/L) (µg/L) (µg/L)
W-22i South Plume Intermediate 57-67 311/96 170 16 90 10 U 50 U 10U 10U 10U 10 U 47
W-22i South Plume Intermediate 57-67 5/1/98 1500 11 1000 2.1 5.0 U 0.28J 1.0 U 0.54J 1.0U 46 D
W-22i Sou1h Plume Intermediate 57-67 12/20/98 110 J 10 D 140J 3 DJ NR 10 U 10UD 0.8 J 10 UJ 58J
W-22i South Plume Intermediate 57-67 6/9/99 86 D 11 D 96 D 10 UD NR 10 UD 10UD 10UD 10 UD 46 D
W-22i South Plume Intermediate 57-67 12/8/99 650 8.5 JD 770 10 UD 50UD 10 UD 10 UD 10UD 10 UD 40 D
W-22i Dup South Plume Intermediate 57-67 12/8/99 63 D 8.2 JD 73 D 1.4 JD 50 UD 10 UD 10 UD 10 UD 10 UD 38 D
W-24s South Plume Shallow 5-20 12/1/95 2 0.3 J 1.0U 7U 1.0 U 1.0U 0.2 J 1.0U 0.3 J
W-24s South Plume Shallow 5-20 5/1/98 0.35 J 1.0U 1.0 U 1.0U 5.0U 1.0U 1.0U 1.0 U 1.0U 1.0 U
W-24s South Plume Shallow 5-20 1/27/99 1.0 U 1.0 U 1.0 U 1.0U 5.0 U 1.0U 1.0 U 0.1 J 1.0U 0.2J
W-24s Dup South Plume Shallow 5-20 1/27/99 1.0U 1.0 U 1.0 U 1.0U 5.0 U 1.0U 1.0U 0.06 J 1.0U 0.2 J
W-24s South Plume Shallow 5-20 6/9/99 O.SOJ 1.0 U 1.0 U 1.0U 5.0U 1.0U 1.0 U 1.0 U 1.0U 1.0 U
W-24s South Plume Shallow 5-20 12/8/99 1.9 1.0 U 0.25J 1.0 U 5.0 U 1.0 U 1.0U 1.0 U 1.0 U 0.30 J
W-24s South Plume Shallow 5-20 617/00 0.55J 1.0 U 1.0 U 1.0 U 5.0 U 1.0 U 1.0U 1.0U 1.0 U 1.0 U
W-26i Side Gradient Intermediate 103-118 12/16/98 0.3 J 0.09 J 0.03 J 0.2J 3J 0.1 J 0.4 J 1.0U 1.0 U 1.0U
W-28i North Plume Intermediate 73-88 12/1/95 230 32 12 10U sou 10 U 10 U 4J 10 U 10 U
W-28i North Plume Intermediate 73-68 5/5/98 1700 42 D 16 D 10 UD 50UD 10UD 10UD 10UD 10UD 10 UD
W-28i North Plume Intermediate 73-68 12/18/98 640 D 24 D 9.0 DJ 10 UD NR 10 UD 10UD 2JD 100 U 10 UD
W-28i North Plume Intermediate 73-68 6/8/99 2500 40 JD 15 JD 50 UD 250 UD 50 UD SOUD 50 UD 50 UD 50 UD
W-28i North Plume Intermediate 73-68 12/7/99 3100 43 D 14JD 50 UD 250 UD 50 UD 50UD 50UD 50 UD SOUD
W-281 North Plume Intermediate 73-88 6/6/00 580 D 33 D 11 D 5.0 UD 25UD 5.0UD 5.0 UD 5.0UO 5.0 uo 5.0UO
W-29i South Plume Intermediate 88-98 12/1/95 15 0.8 J 3 1.0 U 5.0 U 1.0 U 1.0U 0.8 J 1.0U 2
W-29i South Plume Intermediate 88-98 5/1/98 42 D 1.4 DJ 80 2.5 UD 12UD 2.5 UD 2.5 UD 1.1 DJ 2.5 UD 5.40
W-29i South Plume Intermediate 88-98 12/20/98 32J 2JD ?DJ 0.2 DJ NR 2.0 UD 2.0UD 1 J 2.0 UJ 4J
W-29i Dup South Plume Intermediate 88-98 12120/98 34 DJ 2 DJ 7 DJ 0.2 DJ NR 2.0 UD 2.0UD 1 DJ 2.0 UDJ 5 DJ
W-29i South Plume Intermediate 88-98 6/9/99 50 D 5.0 D 7.9 D 2.0UD NR 2.0 UD 2.0UD 0.92 JD 2.0 UD 4.7 D
W-29i Dup South Plume Intermediate 88-98 6/9/99 49 D 5.3 D 7.8 D 2.0UD NR 2.0 UD 2.0UD 0.83 JD 2.0UD 4.5 D
W-29i South Plume Intermediate 88-98 12/9/99 52 D 2.7 JD 8.1 D 5.0 UD 25UD 5.0 UD 5.0UD 5.0 UD 5.0 UD 6.3 D
W-29i Dup South Plume Intermediate 88-98 12/9/99 50 D 2.6 JD 7.8 D 5.0UD 25UD 5.0 UD 5.0UD 5.0 UD 5.0 UD 6.3 D
W-29I South Plume Intermediate 88-98 617/00 60 0 1.7 JO 9.8 0 5.0 uo 25 uo 5.0UO 5.0UO 5.0UO 5.0UO 6.9 0
W-29I Oup South Plume Intermediate 88-98 617/00 55 0 2.6 12 1.0 U 5.0 U 1.0 U 1.0 U 1.0 U 1.0 U 7.6
P:\Proj\60313.01 5~une-00-t03.xls Page 4 of 26
-------- ---- - - -----Table 3. Data from Monitoring Wells Used for Evaluation of Monitored Natural Attenuation 10/27/00
FCX-Statesville Superfund Site OU3
Well lnfonnation Volatile Organic Compounds
e as-, -
Monitoring Screened Sampling T etrachloro-Trichloro-Dichloro-Carbon Chloro-1,1-0ichloro-
Well Zone Well Type Depth Date ethene ethene ethene Vinyl chloride Acetone Benzene disuffide Chloroform methane ethane
(fl) (µg/L) (µg/L) (µg/L) (µg/L) (µg/L) (µg/L) (µg/L) (µg/L) (µg/L) (µg/L)
W-30i North Plume Intermediate 37.5-47.5 12/1195 530 28 J 28 J sou 250 U 50 U 50 U 6J sou sou
W-30i North Plume Intermediate 37.5-47.5 4/30/98 500 D 34 D 20D 2.5 uo 20 UD 2.5 UD 2.5UD 2.5 uo 1.2 OJ 2.5 UD
W-30i North Plume lntennediate 37.5-47.5 12/19198 560 DJ 46 D 28 JD 20 uo NR 20UD 20 UD 20 uo 20U 20UD
W-30i North Plume Intermediate 37.5-47.5 1/26199 1,100D 820 43JD 0.2J 5.0 U 0.2J 1.0 U 0.4 J 1.0U 0.2 J
W-30i North Plume Intermediate 37.5-47.5 1/27199 1,1000 85 D 42JD souo 250 UD SOUD souo 50 uo SOUD 50UO
W-30i North Plume Intermediate 37.5-47.5 619/99 1,100 D 71 D 34 JO SOUD NR souo SOUD SOUD 50 UD souo
W-30i North Plume Intermediate 37.5-47.5 12/8199 1,2000 71 JO 33 JO 100 UD 500 uo 100 uo 100 UD 100 UD 100 UD 100 uo
W•30i North Plume Intermediate 37,5-47.5 617/00 810 D 59 D 340 5,0 UD 25 UD 5.0 UD 5.0 UD 5.0 UD 5.0UD 5.0UD
W-31s North Plume Shallow 5-15 11/1198 1.0U 1.0 U 1.0U 1.0U 5.0 U 1.0 U 1.0 U 0.25J 1.0U 1.0 U
W-31s North Plume Shallow 5-15 11/19198 1.0U 1.0U 1.0U 1.0 U 5.0 U 1.0 U 1.0 U 0.25J 1.0 U 1.0U
W-31s Oup North Plume Shallow 5-15 11/19198 1.0U 1.0U 0.06J 1.0U 5.0 U 1.0 U 1.0 U 0.29J 1.0U 1.0U
W-31s North Plume Shallow 5-15 12/16/98 1.0U 1.0U 0.04J 1.0U NR 1.0 U 1.0U 0.05 J 1.0 U 1.0U
W-31sc North Plume Shallow 5-15 617/99 1.0U 1.0U 1.0 U 1.0 U 5.0 U 1.0 U 1.0 U 1.0 U 1.0 U 1.0 U
W-31s' North Plume Shallow 5-15 6/10/99 0.26 J 1.0 U 1.0U 1.0U NR 1.0U 1.0 U 1.0 U 1.0 U 1.0 U
W-31s North Plume Shallow 5-15 12/6/99 1,0 U 1.0U 1.0U 1.0 U 5.0 U 1.0 U 1.0U 1.0 U 1.0U 1.0 U
W-31s Dup North Plume Shallow 5-15 12/16/99 1.0U 1.0 U 0.06 J 1.0 U NR 1.0U 1.0U 0.04 U 1.0 U 1.0 U
W-31s North Plume Shallow 5-15 6/5/00 1.0U 1.0 U 1.0U 1.0 U 5,0 U 1.0 U 1.0 U 1.0 U 1.0U 1.0 U
W-31i North Plume Intermediate 34-44 11/1/98 1.0U 1.0 U 1.0 U 1.0U 5.0 U 1.0 U 1.0U 1.0U 1.0U 1.0 U
W-31i North Plume Intermediate 34-44 11/19/98 1.0U 1.0U 1.0U 1.0 U 5.0 U 1.0U 1.0 U 1.0 U 1.0U 1.0 U
W-31i North Plume Intermediate 34-44 12/16198 0.1 J 1.0 U 1.0U 1.0U NR 1.0U 1.0 U 0.09J 1.0U 1.0U
W-31i North Plume Intermediate 34-44 617199 1.0U 1.0U 1.0U 1.0U 5.0 U 1.0U 1.2 1.0U 1.0U 1.0U
W-31i North Plume Intermediate 34-44 12/6/99 1.0 U 1.0 U 1.0U 1.0U 5.0 U 1.0U 1.0 U 1.0 U 1.0 U 1.0 U
W-31i North Plume Intermediate 34-44 6/5/00 1.0 U 1.0U 1.0 U 1,0 U 5,0 U 1.0U 1.0U 1.0 U 1.0 U 1,0 U
W-32i South Plume Intermediate 112-132 11/1198 0.26 J 0.11 J 1.0U 1.0U 5.0 U 1.0 U 1.0 U 0.14 J 1.0U 1.0U
W-32i South Plume lntermedia1e 112-132 11/19/98 0.26J 0.11 J 1.0U 1.0U 5.0 U 1.0 U 1.0 U 0.14 J 1.0U 10U
W-32i South Plume Intermediate 112-132 12/18/98 0.4J 0.2 J 1.0UJ 1.0 U NR 1.0 U 1.0 U 1.0 U 1.0 U 1.0U
W-32i South Plume Intermediate 112-132 6/9199 0.63 J 0.22 J 1.0U 1.0 U 5.0 U 1.0U 1.0 U 1.0U 1.0 U 1.0U
W-32i South Plume Intermediate 112-132 12/7/99 0.95 J 0.28 J 1.0 U 1.0 U 5.0 U 1.0U 1.0 U 1.0 U 1.0U 1.0 U
W-32i South Plume Intermediate 112·132 6/8/00 0.59J 1.0 U 1.0 U 1.0 U 5.0 U 1.0U 2.3 1.0 U 0.13 J 1.0 U
P:\Proj\60313.015\june-00-103.xls Page 5 of 26
-- ----- --- ---------Table 3. Data from Monitoring Wells Used for Evaluation of Monitored Natural Attenuation 10/27/00
FCX-Statesville Superfund Site OU3
Well lnfonnation Volatile Organic Compounds
e
Monitoring Screened Sampling 1.2-Dichloro-1, 1-Dichloro-1,2-Dichloro-Me1hylene 4-Me1hy\-2-Trichloro-Trichloro-
Well Zone Well Type Depth Dale ethane ethene ethene propane chlonde pentanone Toluene ethane ethane
(ft) (µgll) (µgll) (µgll) (µg/L) (µgll) (µgll) (µg/L) (µg/L) (µgll)
W-1s Side Gradient Shallow 38-48 12/19198 5.0UD 20 U 1.0 U 5.0 UD 10 U 25 UD 5.0UD 5.0 UD 5.0 UD
W-5s South Plume Shallow 32-42 4/1194 sou 81 50 U sou 50 U 250 U sou 150 13 J
W-5s South Plume Shallow 32-42 10/1194 50 U 73 50 U sou 32 J 250 U 50 U 140 11 J
W-5s South Plume Shallow 32-42 4/30198 3.8J 83 J 3.1 J 2.4J 3.4J 25 UJ 5.0 UJ 140 DJ 13 J
W-5s South Plume Shallow 32-42 12/17198 200 UJ 76 J 200 UJ 200UJ 400 UJ 1,000 UJ 200UJ 85J 200 UJ
W-5sa South Plume Shallow 32-42 619199 100UD 72JD 100 UD 100UD 200 UD 500 UD 100 UD 94JD 100 UD
W-5s Sou1h Plume Shallow 32-42 12/7199 100UD 73JD 100 UD 100UD 200UD 500 UD 100 UD 130D 100 UD
W-5s Dup South Plume Shallow 32-42 12/17199 50UD 100D 50 UD 50 UD 100UD 250 UD 50UD 110D 10 JD
W-5s South Plume Shallow 32-42 6/6/00 100 UD 64JD 100 UD 100 UD 200 UDJ 500 UD 100 UD 100 D 100 UD
W-5i South Plume Intermediate 56-66 10/1194 10U 3J 10 U 10U 4J 50 U 10U 2J 10 U
W-5i South Plume Intermediate 56-66 5/5/98 5.0UD 3.6DJ 5.0 UD 5.0 UD 10 UD 25UD 5.0UD 5.0 UD 5.0UD
W-5i South Plume Intermediate 56-66 12/19/98 1.0U 4 1.0 U 1.0 U 2.0 UJ 5.0U 0.40J 1.0 U 1.0 U
W-5i Sou1h Plume Intermediate 56-66 6/8199 2.0UD 4.6D 2.0 UD 2.0 UD 4.0UD 10UD 2.0 UD 2.0 UD 2.0UD
W-5i South Plume Intermediate 56-66 12/8/99 5.0UD 7.2D 5.0 UD 5.0 UD 10 UD 25 UD 5.0 UD 5.0 UD 5.0UD
W-5i South Plume Intermediate 56-66 6/9/00 5.0UD 11 D 5.0 UD 5.0 UD 10.0 UDJ 25UD 5.0UD 5.0 UD 5.0UD
W-5I Dup South Plume Intermediate 56-66 6/9/00 5.0UD 11 D 5.0 UD 5.0 UD 10.0 UDJ 25UD 5.0 UD 5.0 UD 5.0UD
W-6s Side Gradient Shallow 22-37 4/30198
W-6s Dup Side Gradient Shallow 22-37 4/30198
W-lli Side Gradient Intermediate 83-93 12/16/98 1.0U 0.07 J 0.1 J 5 2.0 U 5.0 U 0.9 JB 1.0U 1.0 U
W-9s Treatment Shallow 34-49 5/5198 10 UD 10 UD 10 UD 10UD 20UD 50 UD 10 UD 10UD 10 UD
W-9s Dup Treatment Shallow 34-49 5/5198 10UD 10 UD 10 UD 10UD 20UD 50 UD 10UD 10UD 10 UD
W-9s Treatment Shallow 34-49 12/17/98 200 UD 200UD 200UD 200 UD 400 U 1,000 UD 200UD 200 UD 200 UD
W-10i Side Gradienl Intermediate 59-69 10/1194 1.0U 1.0 U 1.0U 1.0U 2.0 U 5.0U 1.0 U 1.0U 1.0 U
W-10i Side Gradient Intermediate 59-69 1/1/95 1.0U 1.0 U 1.0U 1.0U 2.0 U 5.0U 1.0 U 1.0U 1.0 U
W-10i Side Gradient Intermediate 59-69 12/1/95 1.0 U 1.0 U 1.0U 1.0 U 2.0 U 5.0U 0.1 J 1.0U 1.0 U
W-10i Side Gradient Intermediate 59-69 4/30/98 1.0U 1.0 U 1.0U 1.0U 4.1 5.0U 1.0 U 1.0U 1.0 U
W-10i Side Gradient Intermediate 59-69 12/19/98 1.0U 1.0 U 1.0U 1.0U 2.0 UJ 5.0UJ 1.0 UJ 1.0U 1.0 U
W-10i Side Gradient Intermediate 59-69 6/8199 1.0U 1.0 U 1.0U 1.0U 2.0 U 5.0U 1.0 U 1.0U 1.0 U
W-10i Side Gradient Intermediate 59-69 12/9/99 1.0 U 1.0U 1.0 U 1.0U 2.0U 5.0 U 1.0 U 1.0U 1.0 U
W-10i Side Gradient Intermediate 59-69 6/6/00 1.0 U 1.0 U 1.0 U 1.0 U 2.0 UJ 5.0 U 1.0 U 1.0 U 1.0U
P :\Proj\60313.01 5~une-OO-to3 .xis Page 6 of 26
-------- --- --------Table 3. Data from Monitoring Wells Used for Evaluation of Monitored Natural Attenuation 10/27/00
FCX-Statesville Superfund Site OU3
Well lnfonnation Volatile Organic Compounds e
Monitoring Screened Sampling 1,2-Dichloro-1, 1-Dichloro-1,2-0ichloro-Methylene 4-Methyl-2-Trichloro-Trichloro-Well Zone Well Type Depth Date ethane ethene ethene propane chloride pentanone Toluene ethane ethane
(fl) (µg/l) (µg/l) (µg/l) (µg/l) (µg/l) (µg/l) (µgll) (µgll) (µg/l)
W-11s Side Gradient Shallow 25-40 4/30/98
W-12s Background Shallow 18-33 10/1/94 1.0 U 1.0U 1.0U 1.0 U 1.0U 5.0U 1.0U 1.0U 1.0U W-12s Background Shallow 18-33 1/1/95 1.0 U 1.0U 1.0U 1.0 U 2.0 U 5.0 U 1.0U 1.0U 1.0U W-12s Background Shallow 18-33 4/30/98 1.0U 1.0U 1.0U 1.0 U 0.61 J 5.0 U 1.0U 1.0 U 1.0U W-12s Background Shallow 18-33 12/8/99
W-12i Background Intermediate 73-<13 10/1/94 1.0U 1.0U 1.0U 1.0U 1.0U 5.0 U 1.0U 1.0U 1.0U W-12i Background Intermediate 73-<13 1/1/95 1.0U 0.1 J 1.0U 1.0 U 2.0 U 5.0 U 1.0 U 1.0 U 1.0 U W-12i Background Intermediate 73-<13 4/30/98 1.0U 1.0U 1.0 U 1.0 U 2.0U 1.1 J 0.24J 1.0 U 1.0U W-12i Background Intermediate 73-<13 12/16/98 1.0 U 0.2 J 1.0 U 1.0U 2.0 U 5.0 U 1.0U 1.0U 1.0U W-12i Background Intermediate 73-<13 6f//99 1.0U 1.0 U 1.0 U 1.0 U 2.0 U 5.0 U 1.0U 1.0 U 1.0U W-12i Background Intermediate 73-<13 1219/99 1.0U 0.17 J 1.0U 1.0 U 2.0 U 5.0 U 1.0 U 1.0 U 1.0U W-12i Background Intermediate 73-83 6(//00 1.0 U 1.0U 1.0 U 1.0 U 2.0 UJ 5.0 U 1.0 U 1.0 U 1.0U
W-16s Treatment Shallow 35-50 5/5/98
W-16s Treatment Shallow 35-50 12/17/98 200 UD 200UD 200UD 200 UD 400UD 1,000 UD 200UD 200 UD 200UD
W-16i Treatment Intermediate 77-<17 5/5/98
W-16i Treatment Intermediate 77-<17 12/17/98 0.9 OJ 0.4 OJ 2.0UD 20 D 4.0UJ 10 UD 2.0 U 2.0UO 2.0 uo
W-17s Source Shallow 29.5-44.5 10/1/94 4,000 U 4,000 U 4,000 U 4,000 U 8,000 U 20,000 U 4,000 U 4,000 U 4,000 U W-17s Source Shallow 29.5-44.5 1/1/95 4,000 U 4,000 U 4,000 U 4,000 U 8,000 U 20,000 U 4,000 U 4,000 U 4,000 U W-17s Source Shallow 29.5-44.5 5/5/98 250 UD 250UD 250UD 57DJ 500UD 1,200 UD 250UD 250 UD 250 UD W-17s Source Shallow 29.5-44.5 12/18/98 10,000 UD 10,000 U 10,000 UD 10,000 UD 20,000 UJ 50,000 UJ 10,000 UD 10,000 UD 10,000 UD W-17s' Source Shallow 29.5-44.5 12/9/99 5,000 UD 5,000 UD 5,000 UD 5,000 uo 10,000 UD 25,000 uo 5,000 UD 5,000 UD 5,000 uo W-17s Source Shallow 29.5-44.5 6/6/00 10,000 UD 10,000 UD 10,000 UD 10,000 UD 20,000 UDJ 50,000 UD 10,000 UD 10,000 UD 10,000 UD
W-18s Background Shallow 22.5-37.5 12/1/95 1 U 1.0U 1.0 U 1.0 U 2.0 U 5.0 U 0.1 J 1.0 U 1.0 U W-18s Background Shallow 22.5-37.5 4/30/98 1.0U 1.0 U 1.0U 1.0U 3.4 5.0 U 1.0U 1.0U 1.0 U W-18s Background Shallow 22.5-37.5 12/16/98 1.0U 1.0U 1.0U 10U 2.0U 5.0 U 1.0U 1.0U 1.0U W-18s Background Shallow 22.5-37.5 6/8/99 1.0 U 1.0U 1.0 U 1.0U 2.0 U 5.0 U 1.0 U 1.0U 1.0U W-18s Background Shallow 22.5-37.5 12/6/99 1.0 U 1.0U 1.0U 1.0 U 2.0 U 5.0 U 1.0U 1.0U 1.0 U W-18s Background Shallow 22.5-37.5 6/6/00 1.0 U 1.0 U 1.0 U 1.0 U 2.0 UJ 5.0 U 1.0U 1.0 U 1.0 U
P:\Pro j\60313.015\june-00-t0J.xls Page 7 of 26
---111!!!!1 ----.. ---liiii.i •· -_., ------Table 3. Data from Monitoring Wells Used for Evaluation of Monitored Natural Attenuation 10/27/00
FCX-Statesville Superfund Site OU3
Well Information Volatile Organic Compounds
e ans-, -
Monitoring Screened Sampling 1,2-0ichloro-1, 1-0ichloro-Dichiaro-1,2-Dichloro-Methylene 4-Methyl-2-Trichloro-Trichloro-
Well Zone Well Type Depth Date ethane ethene ethene propane chloride pentanone Toluene ethane ethane
(ft) (µgll) (µg/L) (µgll) (µgll) (µgll) (µgll) (µgll) (µgll) (µgll)
W-19s North Plume Shallow 17-27 12/1/95 2.0 U 2.0U 2.0 U 2.0 U 2U 10 U 2.0 U 2.0U 2.0 U
W-19s North Plume Shallow 17-27 5/5/98 2.5 UD 2.5UD 2.5 UD 2.5UD 5.0 UD 12 UD 2.5 UD 2.5 UD 2.5 UD
W-19s North Plume Shallow 17-27 12/17/98 1.0 U 0.3J 0.05J 1 2.0 U 5.0 U 1.0U 1.0 U 1.0 u
W-19s North Plume Shallow 17-27 6/10199 20 UD 20 UD 20 UD 20 UD 40 UD 100 UD 20 UD 20 UD 20UD
W-19s North Plume Shallow 17-27 1217199 20 UD 20UD 20 UD 20UD 40UD 100 UD 20UD 20UD 20 UD
W-19s North Plume Shallow 17-27 6/6/00 5.0UD 5.0 UD 5.0UD 1.6 JD 10.0 UDJ 25UD 5.0UD 5.0 UD 5.0 UD
W-20s North Plume Shallow 4-14 12/1195 1.0U 1.0U 1.0 U 1.0 U 2.0 U 5.0 U 1.0U 1.0 U 1.0 u
W-20s North Plume Shallow 4-14 4/29198 1.0 U 1.0U 1.0U 0.28 J 2.0 U 5.0 U 1.0U 1.0U 1.0 u
W-20s Dup North Plume Shallow 4-14 4/29198 1.0 U 1.0U 1.0U 0.26 J 2.0 U 5.0 U 1.0 U 1.0U 1.0U
W-20s North Plume Shallow 4-14 12/20198 1.0 U 1.0 U 1.0 U 0.4J 2.0 UJ 5.0 U 1.0 U 1 UD 1.0 U
W-20s North Plume Shallow 4-14 6/8199 2.0 UD 2.0 UD 2.0 UD 0.58 JD 4.0UD 10UD 2.0UD 2.0UD 2.0UD
W-20s North Plume Shallow 4-14 12/7199 2.0UD 2.0 UD 2.0 UD 1.3JD 4.0UD 10UD 2.0UD 2.0UD 2.0UD
W-20s Dup North Plume Shallow 4-14 12/7199 2.0 UD 2.0 UD 2.0 UD 1.2 JD 4.0UD 10UD 2.0 UD 2.0UD 2.0 UD
W-20s North Plume Shallow 4-14 6/8/00 5.0 UD 5.0 UD 5.0 UD 5.0 UD 10.0 UDJ 25 UD 5.0UD 5.0UD 5.0 UD
W-20s Dup North Plume Shallow 4-14 6/8/00 1.0 U 1.0 U 1.0 U 0.53J 2.0 UJ 5.0 U 1.0 U 1.0 U 1.0U
W-20i North Plume Intermediate 84-94 3/1196 20 U 20U 20 U 20 U 40U 100 U 20 U 20U 20U
W-20i North Plume Intermediate 84-94 4/29198 2.0 UJ 0.4 J 2.0 UJ 8.6 J 4 UJ 1.4 J 2.0 UJ 2.0 UJ 2.0 UJ
W-20i North Plume Intermediate 84-94 12/15198 50 UD 50 UD 50 UD 48 DJ 100 U 250 UD 50 U 50UD 50 UD
W-20i North Plume Intermediate 84-94 1/26/99 1.0 U 0.6 J 0.2 J 16 2.0 U 5.0 U 1.0U 1.0U 1.0 U
W-20i North Plume Intermediate 84-94 1/27199 20 U 20 UD 20 UD 15 JD 40 U 100 UD 20UD 20 U 20 U
W-20i North Plume Intermediate 84-94 6/8199 50UD 50 UD 50UD 13 JD 100UD 250 UD 50UD 50UD 50 UD
W-20i North Plume Intermediate 84-94 12/7199 50UD 50UD 50 UD 11 JD 100UD 250 UD 50UD 50 UD 50UD
W-20i North Plume Intermediate 84-94 6/8/00 1.0 U 0.34J 1.0 U 12 2.0 UJ 5.0 U 1.0 U 1.0 U 1.0 U
W-20d' North Plume Deep 152-166 9/23198 1.0U 1.0 U 1.0 U 2.8 0.58 J 5.0 U 0.88J 1.0U 12.0 U
W-20d North Plume Deep 152-166 12/17198 1.0 U 0.03J 3 1 2.0 U 0.4 J 0.7 J 1.0U 1.0U
W-20d North Plume Deep 152-166 619199 1.0U 1.0U 1.0 U 0.61 J 2.0 U 5.0 U 0.10 J 1.0 U 1.0U
W-20d North Plume Deep 152-166 1219199 1.0U 1.0 U 1.0U 0.95 J 2.0U 5.0 U 1.0U 1.0 U 1.0U
W-20d North Plume Deep 152-166 619/00 1.0 U 1.0 U 1.0 U 0.63J 2.0 UJ 5.0 U 1.0 U 1.0 U 1.0 U
W-22s South Plume Shallow 20-35 12/1195 1.0U 1.0 U 1.0 U 1.0U 2.0 U 5.0U 1.0U 1.0U 1.0 U
W-22s South Plume Shallow 20-35 5/1198 1.0U 1.0 u 1.0U 1.0U 3.7 5.0U 1.0U 0.88J 1.0U
W-22s South Plume Shallow 20-35 12/20198 1.0 U 1.0 U 1.0U 1.0U 2.0UJ 5.0 UJ 1.0U 0.6J 1.0 U
W-22s' South Plume Shallow 20-35 ' 12/8199 1.0U 1.3 1.0U 1.0 U 2.0 U 5.0 U 1.0U 0.78 J 1.0U
W-22s South Plume Shallow 20-35 617/00 1.0 U 0.71 J 1.0 U 1.0 U 2.0 UJ 5.0 U 1.0 U 1.0 U 1.0 U
P:\Proj\60313.015\june-0O-t03.xls Page 8 of 26
-..,,, ---:· -_, ---•iif• .. -; -· liill: , __ ---.. Table 3. Data from Monitoring Wells Used for Evaluation of Monitored Natural Attenuation 10/27/00
FCX-Statesville Superfund Site OU3
Well Information Volatile Organic Compounds
e
Monitoring Screened Sampling 1,2-Dichloro-1, 1-Dichloro-1,2-Dichloro-Methylene 4-Methyl-2-Trichloro-Trichloro-
Well Zone Well Type Depth Date ethane ethene ethene propane chloride pentanone Toluene ethane ethane
(ft) (µg/1.) (µg/1.) (µg/1.) (µg/1.) (µg/1.) (µg/1.) (µg/1.) (µg/1.) (µg/1.)
W-22i South Plume Intermediate 57-87 3/1/96 10 U 10U 10 U 10U 20 U 50 U 10 U 12 10 U
W-22i South Plume lntenmediate 57-67 5/1/98 1.0 U 20 0.46J 1.0U 2.0 U 5.0 U 1.0U 11 0.31 J
W-22i South Plume lntenmediate 57-87 12/20/98 10UD 20 D 0.4 JD 10 UD 20UJ 50UD 10 UD 12 D 10UD
W-22i South Plume lntenmediate 57-87 6/9/99 10UD 11 D 10UD 10 UD 20UD 50UD 10 UD 10UD 10 UD
W-22i South Plume Intermediate 57-87 12/8/99 10UD 10 UD 10UD 10 UD 20 UD 50UD 10 UD 5.4JD 10 UD
W-22i Dup South Plume Intermediate 57-87 12/8/99 10 UD 7.3 JD 10 UD 10 UD 20UD 50 UD 10 UD 5.0JD 10 UD
W-24s South Plume Shallow 5-20 12/1195 1.0 U 0.2 J 1.0U 1.0 U 1.0 U 5.0 U 0.1 J 1.0U 1.0 U
W-24s South Plume Shallow 5-20 5/1/98 1.0 U 1.0U 1.0U 1.0 U 2.0 U 5.0 U 1.0U 1.0U 1.0U
W-24s South Plume Shallow 5-20 1/27199 1.0 U 0.1 J 1.0U 1.0 U 2.0 U 5.0 U 1.0 J 1.0 U 1.0 U
W-24s Dup South Plume Shallow 5-20 1/27/99 1.0 U □.OBJ 1.0U 1.0 U 2.0 U 5.0 U 1.0 U 1.0 U 1.0U
W-24s South Plume Shallow 5-20 6/9/99 1.0U 1.0U 1.0 U 1.0 U 2.0 U 5.0 U 1.0U 1.0 U 1.0U
W-24s South Plume Shallow 5-20 12/8/99 1.0U 0.21 J 1.0 U 1.0U 2.0 U 5.0U 1.0U 1.0U 1.0U
W-24s South Plume Shallow 5-20 6/7/00 1.0 U 1.0 U 1.0 U 1.0 U 2.0 UJ 5.0 U 1.0 U 1.0 U 1.0 U
W-26i Side Gradient lntenmediate 103-118 12/16/98 1.0 U 1.0 U 1.0U 1.0 U 2.0 U 0.5J 0.6 J 1.0U 1.0U
W-28i North Plume lntenmediate 73-SB 12/1195 10 U BJ 10 U 10 U 20 U 50 U 10U 10 U 10 U
W-28i North Plume Intermediate 73-aB 5/5198 10 UD 2.9 DJ 10 UD 10UD 20UD 50UD 10UD 10 UD 10 UD
W-28i North Plume Intermediate 73-SB 12/18/98 10 UD 14D 10 UD 0.8 JD 20 U 50 UD 10U 10 UD 10 UD
W-28i North Plume Intermediate 73-SB 6/8/99 50 UD 50 UD 50 UD 50 UD 100 UD 250 UD 50 UD 50 UD 50 UD
W-28i North Plume Intermediate 73-88 12/7199 50 UD 50 UD 50 UD 50UD 100 UD 250UD 50 UD 50UD 50UD
W-28i North Plume Intermediate 73-88 6/6/00 5.0 uo 7.0 D 5.0 UD 5.0 UD 10.0 UDJ 25UD 5.0 UD 5.0UD 5.0 UD
W-29i South Plume Intermediate 88-98 12/1195 1.0 U 3 1.0 U 1.0U 2.0 U 5.0 U 1.0U 0.5 J 1.0 U
W-29i South Plume Intermediate 88-98 5/1/98 2.5 UD 4.4 D 2.5UD 2.5UD 5.0 UD 12 UD 2.5UD 2.5 UD 2.5 UD
W-29i South Plume Intermediate 88-98 12/20/98 2.0UD 3D 2.0UD 2.0UD 4.0 UJ 10UD 2.0UD 2.0 UD 2.0 UD
W-29i Dup South Plume Intermediate 88-98 12/20/98 2.0UD 4D 2.0UD 2.0UD 4.0 UJ 10UD 2.0UD 2.0UD 2.0 UD
W-29i South Plume lntenmediate 88-98 6/9/99 2.0UD 4.4 D 2.0UD 2.0UD 4.0UD 10UD 2.0UD 2.0 UD 2.0 UD
W-29i Dup South Plume Intermediate 88-98 6/9/99 2.0UD 4.4 D 2.0 UD 2.0UD 4.0 UD 10 UD 2.0UD 2.0UD 2.0 UD
W-29i South Plume Intermediate 88-98 12/9/99 5.0 UD 3.8 JD 5.0 UD 5.0UD 10 UD 25 UD 5.0UD 5.0 UD 5.0 UD
W-29i Dup South Plume Intermediate 88-98 12/9/99 5.0 UD 4.3 JD 5.0UD 5.0UD 10UD 25UD 5.0UD 5.0UD 5.0 UD
W-29i South Plume Intermediate 88-98 6/7/00 5.0 UD 4.0JD 5.0UD 5.0 UD 10.0 UDJ 25 UD 5.0 UD 5.0UD 5.0UD
W-29i Dup South Plume Intermediate 88-98 6/7/00 1.0 uo 5.9 1.0 UD 1.0 UD 2.0 UJ 5.0 U 1.0 U 0.73J 1.0 U
P:\Proj\60313. 0 1 5~une-0O-t03.xls Page 9 of 26
-Iii&' 11111 -.. --... .. -~ .. , ... -· -; ,_ 1111> ---Table 3. Data from Monitoring Wells Used for Evaluation of Mo:iitored Natural Attenuation 10/27/00
FCX-Statesville Superfund Site OU3
Well Information Volatile Organic Compounds
e ans-, -
Monitoring Screened Sampling 1,2-Dichloro-1, 1-0ichloro-Dichiaro-1,2-0ichloro-Methylene 4-Methyl-2-Trichloro-Trichloro-
Well Zone Well Type Depth Date ethane ethene ethene propane chloride pentanone Toluene ethane ethane
(ft) (µg/L) (µg/L) (µg/L) (µg/L) (µg/L) (µg/L) (µg/L) (µg/L) (µg/L)
W-30i North Plume lntennediate 37.5-47.5 12/1195 50U 50U 50 U 50 U 100U 250 U 50U 50 U 50 U
W-30i North Plume lntennediate 37.5-47.5 4/30198 2.5 UD 1.1 DJ 0.38 DJ 5.3 D 12 D 12UD 0.46 DJ 2.5 UD 2.5UD
W-30i North Plume lntennediate 37.5-47.5 12/19198 20 UD 20 U 20 UD 5 DJ 40 U 100 UD 20U 20UD 20UD
W-30i North Plume lntennediate 37.5-47.5 1126199 1.0 U 3 0.1 J 5 2.0 U 5.0U 0.1 J 1.0 U 0.2 J
W-30i North Plume Intermediate 37.5-47.5 1127199 50UD 50UD 50UD 50UD 100 U 250 UD 50 UD 50 UD 50UD
W-30i North Plume Intermediate 37.5-47.5 619199 50 UD 50 UD 50 UD 50UD 100 UD 250UD 50 UD 50 UD 50 UD
W-30i North Plume Intermediate 37.5-47.5 12/8199 100 UD 100 UD 100UD 100 UD 200UD 500 UD 100 UD 100 UD 100UD
W-301 North Plume Intermediate 37.5-47.5 617/00 5.0 UD 2.1 JD 5.0 UD 4.4JD 10.0 UDJ 25 UD 5.0UD 5.0 UD 5.0UD
W-31s North Plume Shallow 5-15 11/1198 1.0 U 1.0U 1.0 U 1.0 U 2.0 U 5.0U 0.06J 1.0 U 1.0U
W-31s North Plume Shallow 5-15 11/19198 1.0 U 1.0U 1.0U 1.0 U 2.0 U 5.0 U 0.068 J 1.0U 1.0U
W-31s Dup North Plume Shallow 5-15 11/19198 1.0 U 1.0U 1.0U 1.0U 2.0 U 5.0 U 1.0U 1.0 U 1.0U
W-31s North Plume Shallow 5-15 12/16198 1.0U 1.0 U 1.0U 1.0 U 2.0U 5.0U 1.0 U 1.0U 1.0U
W-31s' North Plume Shallow 5-15 6fl/99 1.0U 1.0U 1.0U 1.0U 2.0 U 5.0U 1.0 U 1.0 U 1.0U
W-31sc North Plume Shallow 5-15 6110199 1.0 U 1.0U 1.0U 1.0 U 2.0 U 5.0U 1.0 U 1.0U 1.0 U
W-31s North Plume Shallow 5-15 12/6199 1.0U 1.0 U 1.0U 1.0U 2.0 U 5.0U 1.0U 1.0 U 1.0U
W-31s Dup North Plume Shallow 5-15 12/16199 1.0 U 1.0U 1.0U 1.0U 2.0 U 5.0U 1.0U 1.0 U 1.0U
W-31s North Plume Shallow 5-15 6/5/00 1.0U 1.0 U 1.0 U 1.0 U 2.0 UJ 5.0 U 1.0 U 1.0U 1.0 U
W-31i North Plume Intermediate 34-44 1111198 1.0 U 1.0 U 1.0U 1.0 U 2.0 5.0U 1.0 U 1.0 U 1.0U
W-31i North Plume Intermediate 34-44 11119198 1.0U 1.0 U 1.0U 1.0 U 2.0 J 5.0U 1.0U 1.0 U 1.0U
W-31i North Plume Intermediate 34-44 12/16198 1.0 U 1.0 U 1.0U 1.0 U 2.0 U 5.0U 1.0U 1.0U 1.0U
W-31i North Plume lntennediate 34-44 6fl/99 1.0U 1.0 U 1.0U 1.0U 2.0U 5.0U 1.0U 1.0 U 1.0U
W-311 North Plume Intermediate 34-44 12/6199 1.0 U 1.0 U 1.0 U 1.0 U 2.0 U 5.0 U 1.0 U 1.0 U 1.0 U
W-31i North Plume Intermediate 34-44 615/00 1.0 U 1.0 U 1.0 U 1.0 U 2.0 UJ 5.0 U 1.0 U 1.0U 1.0U
W-32i South Plume Intermediate 112-132 11/1198 1.0 U 1.0U 1.0U 1.0 U 2.0 U 5.0 U 0.24 J 1.0U 1.0U
W-32i South Plume lntennediate 112-132 11119198 1.0 U 1.0 U 1.0U 1.0 U 2.0 U 5.0 U 0.24 J 1.0U 1.0U
W-32i South Plume lntennediate 112-132 12/18198 1.0 U 1.0 U 1.0U 1.0 U 2.0 UJ 5.0 UJ 1.0 U 1.0 U 1.0U
W-321 South Plume Intermediate 112-132 619199 1.0U 1.0 U 10U 1.0U 2.0 U 5.0 U 1.0U 1.0 U 1.0 U
W-32i South Plume Intermediate 112-132 12/7199 1.0 U 1.0 U 1.0U 1.0U 2.0 U 5.0U 1.0 U 1.0 U 1.0U
W-32i South Plume Intermediate 112-132 618100 1.0 U 1.0 U 1.0 U 1.0U 2.0 UJ 5.0 U 1.0 U 1.0 U 1.0 U
P:\Proj\60313. o 1 S\june-OO-to3.xls Page 10 of 26
-· ---· .... -..,, .. liill /-.., --· -,' -.. ---Table 3. Data from Monitoring Wells Used for Evaluation of Monitored Natural Attenuation 10/27/00
FCX-Statesville Superfund Site OU3
Well Information Electron Acceptors
e
Monitoring Screened Sampling Manganese Manganese
Well Zone Well Type Depth Date Aluminumd DO Nitrate/ Nitrite (total) (II) Iron (total) Iron (II) Sulfate Sulfide H2S
(ft) (mg/L) (ppm) (mg/L) (mg/L) (ppm) (mg/L) (ppm) (mg/L) (mg/L) (mg/L)
W-1s Side Gradient Shallow 38-48 12/19/98 4.5 0.58 0.749 u 1.810 0.5 u
W-5s South Plume Shallow 32-42 4/1/94
W-5s South Plume Shallow 32-42 10/1/94
W-5s South Plume Shallow 32-42 4/30/98 0.2 1.2 1.12 u 2.93 u u u
W-5s South Plume Shallow 32-42 12/17/98 1.9 1.430 11.100 u u
w.ss• South Plume Shallow 32-42 6/9/99 34.9 1.0 2.3 2.43 0.4 36.1 0.3 1.8 0
W-5s South Plume Shallow 32-42 12/7/99 7.350 1 2.6 1.710 0.3 7.710 1.6 2.3 0
W-5s Dup South Plume Shallow 32-42 12/17/99 2.0 1.6 13.0 u
W-5s South Plume Shallow 32-42 6/6/00 0.894 J 3,2 1.56 J 0.3 0.879 0,5 1.6 0
W-5i South Plume Intermediate 56-66 10/1/94
W-5i South Plume Intermediate 56-66 5/5/98 2.0 u 0.0467 u 1.02 1.1 22 u
W-5i South Plume lntennediate 56-66 12/19/98 u 0.011 B u 0.0706 B 0.2 u
W-5i South Plume Intermediate 56-66 6/8/99 0.746 2.0 u 0.0406 0 0.595 0.4 19 0
W-5i South Plume lntennediate 56-66 12/8/99 10.400 1.5 0.26 0.101 0 5.990 2.5 18 0
W-5i South Plume Intermediate 56-66 6/9/00 1.95 1 0.32 0.0559 0 1.36 18 0
W-5i □ up South Plume Intermediate 56-66 6/9/00 2.01 <0,25 0,059 0 1.38 17 0
W-6s Side Gradient Shallow 22-37 4/30/98 0.173 5.16
W-6s Dup Side Gradient Shallow 22-37 4/30/98 0.184 5.44
W-6i Side Gradient Intermediate 83-93 12/16/98 1,0 u 0.0331 u 4.380 0.2 63 u
W-9s Treatment Shallow 34-49 5/5/98 1.3 0.0365 1.08 u
W-9s Dup Treatment Shallow 34-49 5/5/98 1.3 0.0529 2.43 u
W-9s Treatment Shallow 34-49 12/17/98 1.8 0.535 35.6 u
W-10i Side Gradient lntennediate 59-69 10/1/94
W-10i Side Gradient lntennediate 59-69 1/1/95
W-10i Side Gradient lntennediate 59-69 12/1/95
W-10i Side Gradient lntennediate 59-69 4/30/98 0.6 u 0.0022 B u 0.0361 B u 4.3 0.1
W-101 Side Gradient Intermediate 59-69 12/19/98 2.0 0.31 0.0044 B u 0.111 0.2 u
W-10i Side Gradient Intermediate 59-69 6/8/99 0.128 B 2.0 u 0.0019 B 0 0.0434 B 0.1 3.3 0.1
W-10i Side Gradient Intermediate 59-69 12/9/99 0.271 u 0.0051 0 0.0974 0.3 5.3 0
W-101 Side Gradient Intermediate 59-69 6/6/00 0,368 J 0,31 0.0064 BJ 0 0.148 0,5 7,2 0,1
P:\Proj\60313. O 1 5\june-OO-t03 .xis Page 11 of 26
-------·all! ------·--I-----.. Table 3. Data from Monitoring Wells Used for Evaluation of Monitored Natural Attenuation 10/27/00
FCX-Statesville Superfund Site OU3
Well lnfonnation Electron Acceptors
e
Monitoring Screened Sampling Manganese Manganese
Well Zone Well Type Depth Dale Aluminumd DO Nitrate/ Nitrite (total) (II) Iron (total) Iron (II) Sulfate Sulfide H2S
(fl) (mg/L) (ppm) (mg/L) (mg/L) (ppm) (mg/L) (ppm) (mg/L) (mg/L) (mg/L)
W-11s Side Gradient Shallow 25-40 4/30/98 0.0839 2.17
W-12s Background Shallow 18-33 10/1/94
W-12s Background Shallow 18-33 1/1/95
W-12s Background Shallow 18-33 4/30/98 7.0 1.7 0.0357 u 2.37 0.25 5.8 u
W-12s Background Shallow 18-33 1218/99
W-12i Background lntennediate 73-83 10/1/94
W-12i Background Intermediate 73-83 1/1/95
W-12i Background Intermediate 73-83 4/30/98 4.0 2.7 0.0056 B u 0.042 B u 38 u
W-12i Background Intermediate 73-83 12116/98 3.5 3.1 0.0041 B u 0.0213 B 0.1 46
W-12i Background Intermediate 73-83 6fl/99 0.0247 U 3.0 3.3 0.0054 B 0 0.017 U 0 u 0
W-12i Background Intermediate 73-83 1219/99 1.250 4 2.9 0.0293 0.1 1.890 0.3 32 0
W-12i Background Intermediate 73,83 6fl/00 0.503 J 3 <0.25 0,029 J 0 0.88 0.25 11 0.7
W-16s Treatment Shallow 35-50 5/5/98 0.0413 0.721
W-16s Treatment Shallow 35-50 12117/98
W-16i Treatment lntenmediate 77-87 5/5/98 0.001 U 0.157
W-16i Treatment Intermediate 77-87 12117/98
---- - -W-17s §,o~r~ Shallow 29.5-44.5 10/1/94
W-17s Source Shallow 29.5-44.5 1/1/95
W-17s Source Shallow 29.5-44.5 5/5/98 5.0 24 0.494 u• 1.7 0.2 u u
W-17s Source Shallow 29.5-44.5 12118/98 4.0 27 0.699 0.3 5.1 0.8 u
W-17s' Source Shallow 29.5-44.5 1219/99 5.450 0.707 1.000
W-17s Source Shallow 29.5-44,5 6/6/00
W-18s Background Shallow 22.5-37.5 1211/95
W-18s Background Shallow 22.5-37.5 4/30/98 6.0 0.43 0.0332 u 1.12 0.2 u u
W-18s Background Shallow 22.5-37.5 12116/98 u 0.285 14.300 u
W-18s Background Shallow 22.5-37.5 6/8/99 37.4 3.0 0.47 0.530 0 28.4 0.2 1.8 0
W-18s Background Shallow 22.5-37.5 1216/99 0.444 3 0.32 0.0211 0 0.231 0.4 1.3 0
W-18s Background Shallow 22.5-37,5 6/6/00 0,379 3 0,40 0.0191 J 0 0.229 0,2 1.6 0
P :\Proj\60313. O 15\ju ne-OCH03.xls Page 12 of 26
-· 1111; --.. --illit .. --... ·-· -,.., till: -· --Table 3. Data from Monitoring Wells Used for Evaluation of Monitored Natural Attenuation 10127100
FCX-Statesville Superfund Site OU3
Well Information Electron Acceptors
e
Monitoring Screened Sampling Manganese Manganese
Well Zone Well Type Depth Date Aluminumd DO Nitrate/ Nitrite (total) (II) Iron (total) Iron (11) Su~ate Sulfide H,S
(ft) (mg/I.) (ppm) (mg/I.) (mg/I.) (ppm) (mg/I.) (ppm) (mg/I.) (mg/I.) (mg/I.)
W-19s North Plume Shallow 17-27 1211"35
W-19s North Plume Shallow 17-27 515"38 5.0 0.45 0.0364 u 1.67 0.2 47 u
W-19s North Plume Shallow 17-27 12117"38 0.0744 3.260 31
W-19s North Plume Shallow 17-27 6/10199 0.795 4.0 0.83 0.0414 0.758 0.4 25 0
W-19s North Plume Shallow 17-27 1217199 0.0376 2 12 0.0337 0 0.0156 0.1 17 0
W-19s North Plume Shallow 17-27 616/00 0.0855 BJ 0.94 0.0403 J 0 0.042 B 0.2 19 0
W-20s North Plume Shallow 4-14 1211195
W-20s North Plume Shallow 4-14 4/29198 8.0 u 0.0004 B u 0.0123 U u u u
W-20s Dup North Plume Shallow 4-14 4/29198 u 0.0076 B 0.357 u
W-20s North Plume Shallow 4-14 12120"38 4.0 0.21 0.016 B u 0.844 0.2 u
W-20s North Plume Shallow 4-14 618199 0.593 3.5 u 0.0107 B 0 0.730 0.2 u 0
W-20s North Plume Shallow 4-14 1217199 0.0282 5 0.37 0.001 0.1 0.0389 0.1 1.3 0
W-20s Dup North Plume Shallow 4-14 1217199 0.0217 u 0.00044 0.0161 1.3
W-20s North Plume Shallow 4-14 6/8/00 0.0685 BJ 3 <0.25 0.0011 BJ 0 0.0419 B 0.2 1.1 0
W-20s Dup North Plume Shallow 4-14 6/8100 0.0701 BJ 3 <0.25 0.00097 BJ 0 0.0406 B 0.2 1.1 0
W-20i North Plume Intermediate 84-94 3/1196
W-20i North Plume Intermediate 84-94 4/29198 2.0 0.32 0.0016 B u 0.0181 B u 6.8 u
W-20i North Plume Intermediate 84-94 12115198 1.0 0.067 0.0013 B u 0.0745 B u 13 u
W-20i North Plume Intermediate 84-94 1/26199
W-20i North Plume Intermediate 84-94 1/27,'39
W-20i . North Plume Intermediate -84-94 6/8199. 0.0247 U 1.1 0.48 0.003 u-0 o.011u· 0:1 -9.8 0
W-20i North Plume Intermediate 84-94 1217"39 0.0604 0.8 0.71 0.0011 0 0.0156 0.1 13 0
W-20i North Plume Intermediate 84-94 6/8/00 0.0737 BJ 0.8 <0.25 0.0043 BJ 0 0.103 0.2 13 0.1
W-20d' North Plume Deep 152-166 9/23198
W-20d North Plume Deep 152-166 12117198 0.5 0.00024 B u 0.012 B u 22 u
W-20d North Plume Deep 152-166 619199 0.423 0.2 u 0.0028 B 0 0.147 0 11 0
W-20d North Plume Deep 152-166 12,'3/99 0.137 0.6 u 0.0016 0 0.0282 0 9.2 0
W-20d North Plume Deep 152-166 6/9/00 0.22 0.05 <0.25 0.0011 B 0 0.0134 U 0 9.1 0.5
W-22s South Plume Shallow 20-35 1211195
W-22s South Plume Shallow 20-35 5/1198 7.0 9.5 0.523 0.3 1.82 1.2 1.3 u
W-22s South Plume Shallow 20-35 12120198 4.5 9 0.645 0.2 5.340 2.2 u
W-22s' Soulh Plume Shallow 20-35 1218199 12.200 5.9 0.997 13.700 1.3
W-22s South Plume Shallow 20-35 6/7/00 31 J 6.9 1.92J 38.6 1.6
P :\Proj\60313.015\june.0O-t03.xls Page 13 of26
-· .., ----· .. -----.. --· -.. --Table 3. Data from Monitoring Wells Used for Evaluation of Monitored Natural Attenuation 10/27/00
FCX-Statesville Superfund Site OUJ
Well Information Electron Acceptors
e
Monitoring Screened Sampling Manganese Manganese
Well Zone Well Type Deplh Date Aluminumd DO Nitrate/ Nitrite (lotal) (II) Iron (total) Iron (II) Su~ate Sulfide H,S
(ft) (mg/L) (ppm) (mg/L) (mg/L) (ppm) (mg/L) (ppm) (mg/L) (mg/L) (mg/L)
W-22i Soulh Plume lntenmediate 57-67 3/1196
W-22i Soulh Plume lntennediate 57-67 5/1198 2.0 4.2 0.0464 u 1.26 0.95 u u
W-22i Soulh Plume Intermediate 57-67 12/20198 1.0 4 0.0222 u 1.320 1.9 u
W-22i Soulh Plume lntenmediate 57-67 619199 0.0247 U 0.8 2.9 0.070 0 1.08 1.6 1.3 0
W-22i Soulh Plume lntenmediate 57-67 12/8199 0.0213 1 3.2 0.0316 0 2.130 3.1 2.8 0
W-22i Dup Soulh Plume Intermediate 57-67 12/8199 0.0165 3.3 0.0296 1.950 2.8
W-24s Soulh Plume Shallow 5-20 12/1195
W-24s South Plume Shallow 5-20 5/1198 0.25 2.59 65.7 18
W-24s Soulh Plume Shallow 5-20 1/27199 0.9 0.60 1.78 J 0.1 55.8 J 1.2 3.3 u
W-24s Dup Soulh Plume Shallow 5-20 1/27199
W-24s Soulh Plume Shallow 5-20 619199 81.3 2.0 u 1.47 0.3 80.8 2.0 u 0
W-24s South Plume Shallow 5-20 12/8199 18.000 0.55 0.573 0.1 16.500 1.5 u 0
W-24s South Plume Shallow 5-20 617/00 42,2J 3 <0,25 1.26J 0.3 34.5 3 100 0.1
W-26i Side Gradient Intermediate 103-118 12/16198 3.5 2 0.0174 u 0.0234 B u 11 u
W-28i North Plume Intermediate 73-88 12/1195
W-28i North Plume Intermediate 73-88 5/5198 2.5 0.14 0.0086 B u 0.573 u 42 u
W-28i North Plume Intermediate 73-68 12/18198 2.5 0.52 0.0071 B u 0.433 0.1 24 u
W-28i North Plume Intermediate 73-68 6/8199 0.813 0.5 u 0.0401 0 0.695 0 29 0
W-28i North Plume Intermediate 73-88 12/7199 0.556 0.8 0.44 0.0043 0 0.233 0 14 0
W-28i North Plume Intermediate 73-88 6/6/00 0.766 J . 0.3 -0.32 0.0034 BJ-o-0.234 0 12 0
W-29i Soulh Plume Intermediate 88-98 12/1195
W-29i Soulh Plume Intermediate 88-98 5/1198 5.0 8.5 0.0274 u 0.0123 U u u u
W-29i Soulh Plume Intermediate 88-98 12/20198 4.0 7.5 0.0256 u 5.7 U u u
W-29i Dup Soulh Plume Intermediate 88-98 12/20198 4.5 7.4 0.0001 u 0.026 u u
W-29i Soulh Plume Intermediate 88-98 619199 0.0247 U 4.0 5.8 0.0190 0 0.0170 U 0.1 u 0
W-29i Dup Sou1h Plume Intermediate 88-98 619199 0.0247 U 4.0 5.7 0.0194 0 0.0170 U 0.1 u 0
W-29i Soulh Plume lntenmediate 88-98 12/9199 0.0260 3 6.0 0.0257 0 0.0156 0.1 2.3 0.1
W-29i Dup Soulh Plume lntenmediate 88-98 12/9199 0.0367 6.8 0.0265 0.0224 1.8
W-291 South Plume lntennediate 88-98 6/7/00 0.0654 J 3 6.8 0.0288 J 0 0.0138 B 0.2 1.6 0
W-29iDup South Plume Intermediate 88-98 617/00 0.0625 J 3 7.1 0.0285 J 0 0.0266 B 0.2 1.1 0
P:\Proj\60313.015\June--00-t03 .xis Page 14 of 26
-..., ., _, -llil, -.. ----:ial -----·-Table 3. Data from Monitoring Wells Used for Evaluation of Monitored Natural Attenuation 10/27/00
FCX-Statesville Superfund Site OU3
Well Information Electron Acceptors
e
Monitoring Screened Sampling Manganese Manganese
Well Zone Well Type Depth Date Aluminumd DO Nitrate/ Nitrite (total) (II) Iron (total) Iron (II) Sulfate Sulfide H2S
(ft) (mg/I.) (ppm) (mg/I.) (mg/I.) (ppm) (mg/I.) (ppm) (mg/I.) (mg/I.) (mg/I.)
W-30i North Plume lntennediate 37.5-47.5 12/1195
W-30i North Plume Intermediate 37.5-47.5 4/30198 1.8 u 0.023 u 1.59 0.7 35 5
W-30i North Plume Intermediate 37.5-47.5 12/19198 0.3 u 0.0784 0.1 3.030 0.7 0.3
W-30i North Plume Intermediate 37.5-47.5 1/26199
W-30i North Plume lntennediate 37.5-47.5 1127199
W-30i North Plume lntennediate 37.5-47.5 619199 3.04 0.6 u 0.0735 0 1.63 0.4 35 0.1
W-30i North Plume Intermediate 37.5-47.5 12/8199 4.310 0.9 u 0.166 0 2.960 0.1 27 2
W-30i North Plume Intermediate 37.5-47.5 617100 1.45J 0.05 <0.25 0.139 J 0 1.04 0.1 32 1
W-31s North Plume Shallow 5-15 11/1198
W-31s North Plume Shallow 5-15 11119/98 6.0 u 0.975 0.45 12.8 7 9.1 u
W-31s Dup North Plume Shallow 5-15 11119198 6.5 u 17.4 0.4 64.1 6 10 u
W-31s North Plume Shallow 5-15 12/16198 0.4 0.50 1.420 0.3 4.730 2.9 10 u
W-31sc North Plume Shallow 5-15 6(1199 54.6 1.0 u 2.41 0 66.7 2.1 u 0
W-31s' North Plume Shallow 5-15 6/10199 1.10 1.0 0.89 0.784 0.4 1.31 0.9 3.8 0
W-31s North Plume Shallow 5-15 12/6199 0.492 0.95 0.252 0.3 0.597 1.6 3.8 0
W-31s Dup North Plume Shallow 5-15 12/16199 0.51 1.4 4.4 22
W-31s North Plume Shallow 5-15 6/5/00 4.82 1.7 0.176 J 0 6.33 1.1 3.9 0
W-31i North Plume Intermediate 34-44 11/1198
W-31i North Plume lntennediate 34-44 11/19198 1.6 0.50 0.0045 u 0.0399 u 11 u
W-31i North Plume lntennediate 34-44 12/16198 0.6 0.60 0.0048 B 0.15 0.0208 B 0.1 6.6 u
W-31i North Plume Intermediate 34-44 6(1/99 0.546 0.6 0.93 0.0101 B 0 0.336 0.8 15 2
--W-31i-North Plume . Intermediate 34-44. -12/6199 0.087-0.6 0.56 0.0057 0 -0.107 0.3 9.7 -0.1
W-31i North Plume Intermediate 34-44 615/00 0.0818 B 0.6 0.45 0.0054 BJ 0 0.0915 B 0.25 9.6 0
W-32i South Plume Intermediate 112-132 11/1198
W-32i South Plume Intermediate 112-132 11/19198 10' 0.59 0.0288 u 1.2 14 u
W-32i South Plume Intermediate 112-132 12/18198 1.0 0.74 0.0122 B 0.1 0.344 u 10 u
W-32i South Plume Intermediate 112-132 619199 0.143 B 0.8 0.53 0.0154 0 0.217 0.1 8.8 0
W-32i South Plume Intermediate 112-132 12/7199 0.101 1 0.36 0.0142 0 0.157 0.1 10 0
W-32i South Plume Intermediate 112-132 618100 0.0906 BJ 0.2 0.32 0.0172 J 0 0.0879 B 0.5 9.6 0.7
P:\proj\60313. 015~une-0O-t03.xls Page 15 of26
-.., -· ---· --· ----.. ---.. --Table 3. Data from Monitoring Wells Used for Evaluation of Monitored Natural Attenuation 10/27/00
FCX-Statesville Superfund Site OU3
Well Information Products of Degradation
e
Monitoring Screened Sampling Volatile Fatty
Well Zone Well Type Depth Dale co, Alkalinity Alkalinity Methane Ethene Ethane Acids Chloride
(ft) (mg/I.) (mg/I.) (mg/I.) (µg/1.) (µg/1.) (µg/1.) (mg/I.) (mg/I.)
W-1s Side Gradient Shallow 38-48 12/19/98 16 13 13 0.14 0.007 0.011 u u
W-5s South Plume Shallow 32-42 4/1/94
W-5s South Plume Shallow 32-42 1011194
W-5s South Plume Shallow 32-42 4130198 112 u u u u u 12 34
W-5s South Plume Shallow 32-42 12/17/98 234 7.6 7.6 6.2 0.024 0.30 6.0 5.3
w-ss• South Plume Shallow 32-42 619199 105 9.3 4.5 0.12 O.D15 4.3
W-5s South Plume Shallow 32-42 1217/99 85 7.8 u u u 13 4.7
W-5s Dup South Plume Shallow 32-42 12/17/99 9.8 9.8 6.48 0.03 0.14 3.0 5.6
W-5s South Plume Shallow 32-42 6/6100 85 10 <5.0 <1.0 <1.0 <7.8 5.2
W-5i South Plume Intermediate 56-66 1011/94
W-5i South Plume Intermediate 56-66 5/5198 40 39 39 u u u 14 2.0
W-5i South Plume Intermediate 56-66 12/19/98 38 52 52 0.56 0.36 0.15 3.0 1.3
W-5i South Plume Intermediate 56-66 6/8199 60 51 0.48 0.072 0.091 2.4
W-5i South Plume Intermediate 56-66 12/8/99 20 56 u u u 5.5 2.2
W-5i South Plume lntennediate 56-66 619100 40 59 <5.0 <1.0 <1.0 39 2.4
W-5i Dup South Plume lntennediate 56-66 619100 40 60 <5.0 <1.0 <1.0 <7.8 2.5
W-6s Side Gradient Shallow 22-37 4130198
W-6s Dup Side Gradient Shallow 22-37 4130198
W-6i Side Gradient Intermediate 83-93 12/16198 2 110 110 0.77 27 0.15 3.0 9.2
-. --W-9s . Treatment sfi'affow 34-49 515198 u u u u u 5.7 4.9
W-9s Dup Treatment Shallow 34-49 515198 u u u u u 4.6 4.7
W-9s Treatment Shallow 34-49 12/17/98 2.2 2.2 0.51 0.009 0.12 u 3.1
W-10i Side Gradient Intermediate 59-69 1011/94
W-10i Side Gradient Intermediate 59-69 111195
W-10i Side Gradient Intermediate 59-69 12/1195
W-10i Side Gradient Intermediate 59-69 4130/98 15 38 38 u u u 12 u
W-10i Side Gradient Intermediate 59-69 12/19/98 10 39 39 1.6 0.010 0.016 u u
W-10i Side Gradient Intermediate 59-69 6/8199 15 39 540 0.63 u 1.1
W-10i Side Gradient Intermediate 59-69 12/9/99 10 38 u u u u 1.1
W•10i Side Gradient lntennediate 59-69 616100 10 55 93 <1.0 <1.0 <7.8 1.3
P :\Proj\60313.01 S\june-OO-t03.xls Page 16 of 26
---· ---· --------- --.. -Table 3. Data from Monitoring Wells Used for Evaluation of Monitored Natural Attenuation 10/27/00
FCX-Statesville Superfund Site OU3
Well Information Products of Degradation
e
Monitoring Screened Sampling Volatile Fatty
Well Zone Well Type Depth Date co, Alkalinity Alkalinity Methane Ethane Ethane Acids Chloride
(ft) (mg/L) (mg/L) (mg/L) (µg/L) (µg/L) (µg/L) (mg/L) (mg/L)
W-11s Side Gradient Shallow 25--40 4/30/98
W-12s Background Shallow 18-33 10/1/94
W-12s Background Shallow 18-33 1/1/95
W-12s Background Shallow 18-33 4/30/98 24 u u u u u 5.7 1.9
W-12s Background Shallow 18-33 12/8/99
W-12i Background Intermediate 73-1!3 10/1/94
W-12i Background Intermediate 73-1!3 1/1/95
W-12i Background Intermediate 73-1!3 4/30/98 60 25 25 u u u 34 30
W-12i Background Intermediate 73-1!3 12/16/98 55 31 31 2.2 0.028 0.26 u 31
W-12i Background Intermediate 73-1!3 617/99 120 32 1.7 0.026 u 28
W-12i Background Intermediate 73-1!3 12/9/99 30 33 u u u 70 33
W-12i Background Intermediate 73-83 617/00 50 50 230 <1.0 <1.0 39 33
W-16s Treatment Shallow 35-50 5/5/98
W-16s Treatment Shallow 35-50 12/17/98
W-16i Treatment Intermediate 77-1!7 5/5/98
W-16i Treatment Intermediate 77-1!7 12/17/98
W-17s Source Shallow 29.5-44.5 10/1/94
W-17s Source Shallow 29.5-44.5 1/1/95 C'
W-17s Source Shallow 29.5-44.5. -5/5/98-· -46 . u u -u u u 5.7 27
W:\is Source Shallow 29.5-44.5 12/18/98 32 3.9 3.9 1.9 0.06 0.12 3.0 29
W-17s' Source Shallow 29.5-44.5 12/9/99 u u u
W-17s Source Shallow 29.5-44.5 6/6/00
W-18s Background Shallow 22.5-37.5 12/1/95
W-18s Background Shallow 22.5-37.5 4/30/98 90 u u u u u 23 u
W-18s Background Shallow 22.5-37.5 12/16/98 3.3 3.3 0.37 0.006 0.1 3.0 u
W-18s Background Shallow 22.5-37.5 6/8/99 30 3.5 0.14 u u 1.7
W-18s Background Shallow 22.5-37.5 12/6/99 30 2.2 u u· u u u
W-18s Background Shallow 22.5-37.5 6/6/00 50 3.4 <5.0 <1.0 <1.0 <7.8 1.3
P:\Proj\60313.015\june'.-O0-t03 .xis Page 17 of26
--- --.. -------------Table 3. Data from Monitoring Wells Used for Evaluation of Monitored Natural Attenuation 10/27/00
FCX-Statesville Superfund Site OU3
Well Information Products of Degradation
e
Monitonng Screened Sampling Volatile Fatty
Well Zone Well Type Depth Date co, Alkalinity Alkalinity Methane Ethene Ethane Acids Chlonde
(ft) (mg/L) (m9/L) (m9/L) (µ9/L) (µ9/L) (µ9/L) (m91L) (m9/L)
W-19s North Plume Shallow 17-27 12/1195
W-19s North Plume Shallow 17-27 5/5198 100 26 26 u u u 18 31
W-19s North Plume Shallow 17-27 12/17198 15 15 0.34 0.012 0.083 3.0 34
W-19s North Plume Shallow 17-27 6/10199 73 16 0.33 u u 43
W-19s North Plume Shallow 17-27 12/7199 55 13 u u u 13 48
W-19s North Plume Shallow 17•27 6/6/00 55 18 <5.0 <1.0 <1.0 <7.8 44
W-20s North Plume Shallow 4-14 12/1195
W-20s North Plume Shallow 4-14 4/29198 40 28 28 u u u 12 u
W-20s Dup North Plume Shallow 4-14 4/29/98 29 29 u u u 2.9 u
W-20s North Plume Shallow 4-14 12/20/98 14 33 33 0.097 u 0.014 3.0 u
W-20s North Plume Shallow 4-14 6/8199 40 31 0.074 u u t.6
W-20s North Plume Shallow 4-14 12/7/99 14 37 u u u 8.8 2.0
W-20s Dup North Plume Shallow 4-14 12/7199 37 .u u u 8.8 2.1
W-20s North Plume Shallow 4-14 6/8/00 15 34 <5.0 <1.0 <1.0 <7.8 1.8
W-20s Dup North Plume Shallow 4-14 6/8/00 15 34 <5.0 <1.0 <1.0 <7.8 1.9
W-20i North Plume Intermediate 84-94 3/1/96
W-20i North Plume Intermediate 84-94 4/29198 14 56 56 u u u 26 14
W-20i North Plume Intermediate 64-94 12/15/98 16 64 64 1.4 0.55 0.22 u 36
W-20i North Plume Intermediate 64-94 1/26/99
W-20i North Plume Intermediate 64-94 1/27199
W-20i North Plume Intermediate 64-94 6/8/99 20 61 1.6 0.028 -0.025 23
W-20i North Plume ln~rmediate _ -84-94 --12/7/99 · · 10 -·68 u u u 13 35
W•20i North Plume lntennedlate 84-94 6/8/00 10 64 130 <1.0 <1.0 <7.8 30
W-20d' North Plume Deep 152-166 9/23198
W-20d North Plume Deep 152-166 12/17/98 610 610 4.1 0.43 0.26 u 6.7
W-20d North Plume Deep 152-166 6/9/99 510 1.8 0.59 0.064 2.9
W-20d North Plume Deep 152-166 12/9/99 saturated 460 u u u 7.4 2.6
W-20d North Plume Deep 152-166 6/9/00 saturated 180 <5.0 <1.0 <1.0 <7.8 2.7
W-22s South Plume Shallow 20-35 12/1195
W-22s South Plume Shallow 20-35 5/1/98 55 u u u u u 14 9.9
W-22s South Plume Shallow 20-35 12/20/98 60 u u 0.26 0.011 0.013 3.0 8.4
W-22s' South Plume Shallow 20-35 12/8/99 <1.0 u u u u 7.3
W-22s South Plume Shallow 20-35 6/7/00 5.7 <5.0 <1.0 <1.0 <7.8 6.8
P:\Proj\60313. 015\june-0O-t03 .x1s Page 18 of26
------ -----1111 -----· --Table 3. Data from Monitoring Wells Used for Evaluation of Monitored Natural Attenuation 10127100
FCX-Statesville Superfund Site OU3
Well lnfonnation Products of Degradation
e
Monitoring Screened Sampling Volatile Fatty
Well Zone Well Type Depth Date co, Alkalinity Alkalinity Methane Ethene Ethane Acids Chloride
(ft) (mg/I.) (mg/I.) (mg/I.) (µgit.) (µgit.) (µgit.) (mg/I.) (mg/I.)
W-22i South Plume Intermediate 57-67 311/96
W-22i South Plume Intermediate 57-67 511/98 105 49 49 u u u 34 16
W-22i South Plume Intermediate 57-67 12120/98 100 45 45 1.1 0.011 0.013 3.0 14
W-22i South Plume Intermediate 57-67 619/99 85 57 33 0.69 0.262 9.9
W-22i South Plume Intermediate 57-67 1218199 65 53 420 u u u 7.9
W-22i Dup South Plume Intermediate 57-67 . 1218199 53 420 u u u 7.7
W-24s South Plume Shallow 5-20 1211195
W-24s South Plume Shallow 5-20 511198 15 15 0.408 u u 17 14
W-24s South Plume Shallow 5-20 1/27199 90 14 14 51 0.041 u 3.0 29
W-24s Dup South Plume Shallow 5-20 1/27199
W-24s South Plume Shallow 5-20 619199 55 17 0.34 u u 18
W-24s South Plume Shallow_ 5-20 1218199 80 14 u u u u 12
W-24s South Plume Shallow 5-20 617100 65 15 16 <1.0 <1.0 16 28
W-26i · Side Gradient lntemnediate 103-118 12116198 14 86 86 1.3 1.3 0.16 30 14
W-28i North Plume lntemnediate 73-68 1211/95
W-28i North Plume Intermediate 73-68 515198 2 84 84 u u u 40 5.2
W-28i North Plume Intermediate 73-68 12118/98 120 120 1.5 0.43 0.24 3.0 3.2
W-28i North Plume Intermediate 73-68 618199 130 0.66 0.85 0.11 4.3
W-28i North Plume lntemnediate 73-68 1217/99 saturated 120 u u u u 2.6
W-28i North Plume lnteJ'!!lajiate . 73-68 _ 616100 --saturated 150 <5.0 <1.0 <1.0 39 2.8
W-29i South Plume Intermediate 88-98 1211/95
W-29i South Plume Intermediate 88-98 511/98 50 8.1 8.1 u u u 17 23
W-29i South Plume lntemnediate 88-98 12120/98 60 8.7 8.7 0.26 0.009 0.019 3.0 21
W-29i Dup South Plume lntemnediate 88-98 12120198 58 11 11 0.24 0.01 0.02 3.0 21
W-29i South Plume Intermediate 88-98 6/9199 80 12 0.33 0.034 0.007 15
W-29i Dup South Plume Intermediate 88-98 6/9199 80 12 0.43 0.050 0.016 14
W-29i South Plume Intermediate 88-98 1219/99 45 9.4 u u u 5.5 19
W-29i Dup South Plume lntemnediate 88-98 1219/99 9.4 u u u 5.5 19
W-29i South Plume Intermediate 88-98 6/7100 50 10 <5.0 <1.0 <1.0 <7.8 21
W-29i Dup South Plume Intermediate 88-98 6/7100 50 15 <5,0 <1.0 <1.0 <7.8 22
P:\Proj\60313. 01 5\june-0O--t03 .xis Page 19 of26
-- -----------.. - ----Table 3. Data from Monitoring Wells Used for Evaluation of Monitored Natural Attenuation 10/27/00
FCX-Statesville Superfund Site OU3
Well Information Products of Degradation
e
Monitoring Screened Sampling Volatile Fatty
Well Zone Well Type Depth Date co, Alkalinity Alkalinity Methane Ethene Ethane Acids Chloride
(ft) (mg/L) (mg/L) (mg/L) (µg/L) (µg/L) (µg/L) (mg/L) (mg/L)
W-30i North Plume lntennediate 37.5-47.5 12/1/95
W-30i North Plume Intermediate 37.5-47.5 4/30/98 19 170 170 u u u 49 30
W-30i North Plume lntennediate 37.5-47.5 12/19/98 18 140 140 1.4 0.46 0.095 9.0 22
W-30i North Plume Intermediate 37.5-47.5 1/26/99
W-30i North Plume Intermediate 37.5-47.5 1/27/99
W-30i North Plume Intermediate 37.5-47.5 6/9/99 5 130 1.7 0.99 0.45 19
W-30i North Plume Intermediate 37.5-47.5 12/8/99 saturated 140 u u u 11 21
W-30i North Plume Intermediate 37.5-47.5 617/00 saturated 190 <5.0 <1.0 <1.0 16 23
W-31s North Plume Shallow 5-15 11/1/98
W-31s North Plume Shallow 5-15 11/19/98 45 61 61 11.6 7.6 1.2 u 4.6
W-31s Dup North Plume Shallow 5-15 11/19/98 50 55 55 11.5 5.9 1.2 u 4.6
W-31s North Plume Shallow 5-15 12/16/98 26 64 64 3.8 0.D15 0.27 3.0 5.5
W-31s' North Plume Shallow 5-15 6f//99 43 0.48 u u 5.5
W-31sc North Plume Shallow 5-15 6/10/99 25 39 0.19 u u 4.1
W-31s North Plume Shallow 5-15 12/6/99 20 39 u u u u 3.1
W-31s Dup North Plume Shallow 5-15 12/16/99 64 64 3.3 0.011 0.23 u 6.1
W-31s North Plume Shallow 5-15 6/5100 25 32 <5.0 <1.0 <1.0 <7.8 3.4
W-31i North Plume Intermediate 34-44 11/1/98
W-31i North Plume Intermediate 34-44 11/19/98 12 34 34 0.18 1.8 0.022 u 1.1
W-31i North Plume Intermediate 34-44 12/16/98 10 31 31 0.80 0.019 0.21 u 1.5 -
W-31i N9rth .Pl_ume Intermediate. 34-44. _ 6f//99 - - --15 . 58 --0.20 u u 2.5
W-31i North Plume Intermediate 34-44 12/6/99 10 30 u u u u 1.7
W-311 North Plume Intermediate 34-44 6/5/00 15 33 <5.0 <1.0 <1.0 <7.8 1.6
W-32i South Plume Intermediate 112-132 11/1/98
W-32i South Plume Intermediate 112-132 11/19/98 10 65 65 0.20 1.4 0.023 3.0 1.7
W-32i South Plume lntennediate 112-132 12/18/98 16 67 67 0.52 0.061 0.097 3.0 1.9
W-32i South Plume lntennediate 112-132 6/9/99 20 62 0.61 0.15 0.020 2.6
W-32i South Plume lntennediate 112-132 12/7/99 8 61 u u u 83 2.5
W-32i South Plume Intermediate 112-132 6/8/00 5 68 <5.0 <1.0 <1.0 <7.8 2.0
P :\P roj\60313.015\june-OO-t03 .xis Page 20 of26
------- ----.. -------Table 3. Data from Monitoring Wells Used for Evaluation of Monitored Natural Attenuation 10/27/00
FCX-Statesville Superfund Site OU3
Well lnfonnation Nutrients Geochemical Parameters
e
Monitoring Screened Sampling
Well Zone Well Type Depth Date TOC Phosphate TKN Ammonium Ni~ate/ Nitrite Conductivity Temperature pH Eh
(ft) (mg/I.) (mg/I.) (mg/I.) (mg/I.) (mg/I.) (µmhos) ('C) (unitless) (mv)
W-1s Side Gradient Shallow 38-48 12/19/98 u 0.58 15 21 5.5 300
W-5s South Plume Shallow 32-42 411194
W-5s South Plume Shallow 32-42 10/1/94
W-5s South Plume Shallow 32-42 4/30/98 9.4 u u u 1.2 157 21.3 4.7 216
W-5s South Plume Shallow 32-42 12/17/98 5.6 1.9
W-5s1 South Plume Shallow 32-42 6/9/99 3.6 2.3 70 22.5 6.8 298
W-5s South Plume Shallow 32-42 12/7/99 6.4 2.6 70 17.4 4.9 205
W-5s Dup South Plume Shallow 32-42 12/17/99 5.6 2.0
W-5s South Plume Shallow 32-42 6/6/00 6.1 3.2 80 19.4 5.0 85
W-5i South Plume Intermediate 56-66 10/1/94
W-5i South Plume Intermediate 56-66 5/5198 1.0 0.11 u u u 161 19.8 8.3 136
W-5i South Plume Intermediate 56-66 12/19/98 u u 120 16 6.8 132
W-5i South Plume Intermediate 56-66 6/8/99 3.6 u 150 19 7.7 320
W-5i South Plume Intermediate 56-66 12/8199 u 0.26 140 16.4 6.5 100
W-5i South Plume Intermediate 56-66 619/00 1.7 0.32 140 19.3 6.9 114
W-5i Dup South Plume Intermediate 56-66 6/9/00 1.5 <0.25 140 19.3 6.9 114
W-6s Side Gradient Shallow 22-37 4/30/98 188 19.4 5.1
W-6s Dup Side Gradient Shallow 22-37 4/30/98 188 19.4 5.1
W-Bi Side Gradient Intermediate 83-93 12/16/98 36 u 390 17 8.5 139
W-9s Treatment Shallow 34-49 5/5/98 u 0.050 u u 1.3 37 20.1 6.4 230
W-9s Dup Treatment Shallow 34-49 5/5198 1.0 0.050 u u 1.3 37 20.1 6.4 230
W-9s Treatment Shallow 34-49 12/17198 u 1.8
W-10i Side Gradient Intermediate 59-69 10/1194
W-10i Side Gradient Intermediate 59-69 1/1/95
W-10i Side Gradient Intermediate 59-69 12/1/95
W-10i Side Gradient Intermediate 59-69 4/30/98 u 0.022 u u u 87.7 18.2 7.2 310
W-10i Side Gradient Intermediate 59-69 12/19/98 u 0.31 80 17 7.7 350
W-10i Side Gradient Intermediate 59-69 6/8199 u u 100 16 7.5 124
W-10i Side Gradient Intermediate 59-69 12/9/99 1.2 u 110 15.9 7 205
W-10i Side Gradient Intermediate 59-69 6/6/00 1.4 0.31 110 17.4 7.1 28
P:\Prof\60313.015\june-0O-t03.x1s Page 21 of 26
- ----------... ----- --Table 3. Data from Monitoring Wells Used for Evaluation of Monitored Natural Attenuation 10/27/00
FCX-Statesville Superfund Site OU3
Well Information Nutrients Geochemical Parameters
e
Monitoring Screened Sampling
Well Zone Well Type Deplh Dale TOG Phosphate TKN Ammonium Nitrale/ Nitrite Conductivity Temperature pH Eh
(ft) (mg/L) (mg/L) (mg/L) (mg/L) (mg/L) (µmhos) (°C) (unitless) (mv)
W-11s Side Gradient Shallow 25-40 4/30/98 68 19.1 5.1 302
W-12s Background Shallow 18-33 10/1/94
W-12s Background Shallow 18-33 1/1/95
W-12s Background Shallow 18-33 4/30/98 u u u u 1.7 43.7 19.3 4.9 305
W-12s Background Shallow 18-33 12/8/99
W-12i Background Intermediate 73.S3 10/1/94
W-12i Background Intermediate 73.S3 1/1/95
W-12i Background Intermediate 73.S3 4/30/98 1.3 0.027 u u 2.7 281 20 6.0 284
W-12i Background Intermediate 73.S3 12/16/98 u 3.1 200 17 5.0 22
W-12i Background Intermediate 73.S3 617/99 u 3.3 200 20 6.0 -168
W-12i Background Intermediate 73.S3 12/9/99 1.1 2.9 260 15.8 5.7 -90
W-12i Background Intermediate 73-83 6moo 28 <0.25 280 18.8 6.0 -124
W-16s Treatment Shallow 35-50 5/5/98 75 20 5.4 192
W-16s Treatment Shallow 35-50 12/17/98 75 20 5.4 323
W-16i Treatment Intermediate 77.S7 5/5/98 250 22 7.3 180
W-16i Treatment Intermediate 77.S7 12/17/98
W-17s Source Shallow 29.5-44.5 10/1/94
W.-11s _ jource _ Shallow 29.5-44.5 -1/1/95--. ---W-17s Source Shallow 29.5-44.5 5/5/98 1.9 0.041 u u 24 320 27 4.9 230
W-17s Source Shallow 29.5-44.5 12/18/98 u 27 300 23 4.4 252
W-17s' Source Shallow 29.5-44.5 12/9/99 490 21.1 4.5
W-17s Source Shallow 29.5-44.5 6/6/00
W-18s Background Shallow 22.5-37.5 12/1/95
W-18s Background Shallow 22.5-37.5 4/30/98 u 0.088 u u 0.43 20 18.4 5.2 498
W-18s Background Shallow 22.5-37.5 12/16/98 u u
W-18s Background Shallow 22.5-37.5 6/8/99 u 0.47 20 15 6.1 351
W-18s Background Shallow 22.5-37.5 12/6/99 u 0.32 20 14.7 5.6 225
W-18s Background Shallow 22.5-37.5 6/6/00 <1.0 0.40 20 18.6 5.1 108
P:\ProJ\60313.015\june-OO-t03.xls Page 22 of 26
------------.. --- ----Table 3. Data from Monitoring Wells Used for Evaluation of Monitored Natural Attenuation 10/27/00
FCX-Statesville Superfund Site OU3
Well lnfonnation Nutrients Geochemical Parameters
e
Monitoring Screened Sampling
Well Zone Well Type Depth Date TOC Phosphate TKN Ammonium Nitrate/ Nitrite Conductivity Temperature pH Eh
(ft) (mgll) (mgll) (mgll) (mg/L) (mgll) (µmhos) ("C) (unitless) (mv)
W-19s North Plume Shallow 17-27 12/1/95
W-19s North Plume Shallow 17-27 5/5/98 u 0.031 u u 0.45 269 17.8 6,3 196
W-19s North Plume Shallow 17-27 12/17/98 1,3
W-19s North Plume Shallow 17-27 6/10/99 1,4 0.83 230 16 5.5 228
W-19s North Plume Shallow 17-27 12/7/99 u 1.2 270 16.6 5.4 326
W•19s North Plume Shallow 17•27 6/6/00 <to 0.94 270 17,7 5.6 129
W-20s North Plume Shallow 4-14 12/1/95
W-20s North Plume Shallow 4-14 4/29/98 u 0.045 u u u 70.4 14,8 7,4 131
W-20s Dup North Plume Shallow 4-14 4/29/98 u 0.069 u u u
W-20s North Plume Shallow 4-14 12/20/98 u 0.21 55 15 6.9 252
W-20s North Plume Shallow 4-14 6/8/99 u u 60 16 6.1 243
W-20s North Plume Shallow 4-14 12/7/99 u 0.37 80 13.5 6.6 321
W-20s Dup North Plume Shallow 4-14 12/7/99 u u
W-20s North Plume Shallow 4-14 6/8/00 <1.0 <0.25 80 14.5 6.7 273
W-20s Dup North Plume Shallow 4-14 6/8/00 <1.0 <0.25 80 14.5 6.7 273
W-20i North Plume Intermediate 84-94 3/1/96
W-20i North Plume Intermediate 84-94 4/29/98 u u u u 0.32 172 15.2 8.6 -328
W-20i North Plume Intermediate 84-94 12/15/98 u 0.067 190 15 7.6 199
W-20i North Plume Intermediate 84-94 1/26/99
W-20i North Plume Intermediate 84-94 1/27/99
W-20i North Plume Intermediate 84-94 6/8/99 u 0.48 210 16 7.3 227
W-20i North Plume Intermediate 84-94 12/7/99 u 0.71 250 13.8 7.4 -199
W-20i North Plume lntennediate 84-94 6/8/00 1.6 _<0.25 250 15.4_ -7.6 163
W-20d" North Plume Deep 152-166 9/23/98
W-20d North Plume Deep 152-166 12/17/98 4.6 -237
W-20d North Plume Deep 152-166 6/9/99 5.7 u 1700 16 11.9 136
W-20d North Plume Deep 152-166 12/9/99 4.8 u 1750 14 11.7 -350
W-20d North Plume Deep 152-166 6/9/00 1.8 <0.25 760 16 11.9 -335
W-22s South Plume Shallow 20-35 12/1/95
W-22s South Plume Shallow 20-35 5/1/98 u u u u 9.5 108 18.9 4.7 332
W-22s South Plume Shallow 20-35 12/20/98 u 9 85 18 4.7 230
W-22s' South Plume Shallow 20-35 12/8/99 1.0 5.9 120 16.4 4.8
W-22s South Plume Shallow 20-35 6/7/00 1.1 6.9 120 18.3 4.5
P:\Proj\60313.01 5~une-00-t03.xls Page 23 of 26
-.. --.. -------.. --- ---Table 3. Data from Monitoring Wells Used for Evaluation of Monitored Natural Attenuation 10/27/00
FCX-Statesville Superfund Site OU3
Well Information Nutrients Geochemical Parameters
e
Monitoring Screened Sampling
Well Zone Well Type Depth Dale TOG Phosphate TKN Ammonium Nitrate/ Nitrite Conductivity Temperature pH Eh
(ft) (mgll) (mgll) (mgll) (mgll) (mgll) (µmhos) ('C) (unitless) (mv)
W-22i South Plume lntem,ediate 57-87 3/1/96
W-22i South Plume lnlen11ediate 57.f,7 5/1/98 1.0 u u u 4.2 176 19.1 6.2 222
W-22i South Plume Intermediate 57-87 12120/98 1.3 4 140 19 6.0 136
W-22i South Plume Intermediate 57-87 6/9/99 2.4 2.9 170 16 6.3 145
W-22i South Plume Intermediate 57-87 1218/99 u 3.2 220 6.2 94
W-22i Dup South Plume Intermediate 57.f,7 1218/99 1.0 3.3
W-24s South Plume Shallow 5-20 1211/95
W-24s South Plume Shallow 5-20 5/1/98 1.3 0.12 u u 0.25 185 20.5 5.7 230
W-24s South Plume Shallow 5-20 1/27/99 1.2 u 240
W-24s Dup South Plume Shallow 5-20 1/27/99
W-24s South Plume Shallow 5-20 6/9/99 1.4 u 90 15.5 5.9 204
W-24s South Plume Shallow 5-20 1218/99 u 0.55 130 13 5.8 237
W-24s South Plume Shallow 5-20 6/7/00 1.5 <0.25 210 16.9 5.5 209
W-26i Side Gradient lnten11ediate 103-118 12116/98 u 2 240 17 7.1 237
W-28i North Plume Intermediate 73-88 1211/95
W-28i North Plume Intermediate 73-88 5/5/98 6.0 0.13 u u 0.14 604 19.8 9.8 158
W-28i North Plume Intermediate 73-88 12118/98 2.5 0.52 220 18 10.0
W-28i North Plume Intermediate 73-88 6/8/99 3.6 u 390 19 10.5 280
W-28i North Plume Intermediate 73-88 1217/99 2.5 0.44 270 15.9 9.9 41
W-28i North Plume Intermediate 73-88 6/6/00 2.3 0.32 380 21.9 10.6 120
W-29i South Plume Intermediate 88-98 1211/95 -
-W-29i South Plume~ Intermediate-88'98_ 5/1/98 u u u u 8.5 167 17.2 5.3 235
W-29i South Plume Intermediate 88-98 12120/98 u 7.5 120 17 4.9 239
W-29i Dup South Plume Intermediate 88-98 12120/98 1.7 7.4 120 17 4.9 247
W-29i South Plume lntem,ediate 88-98 6/9/99 1.4 5.8 110 16 5.6 228
W-29i Dup South Plume lnlen11ediate 88-98 6/9/99 u 5.7 110 16 5.6 228
W-29i South Plume Intermediate 88-98 1219/99 u 6.0 180 15.4 5.8 331
W-29i Dup South Plume lnten11ediate 88-98 1219/99 u 6.8
W•29i South Plume Intermediate 88-98 6/7/00 <1.0 6.8 180 18.6 5.4 219
W-29i0up South Plume Intermediate 88-98 6/7/00 <1.0 7.1 180 18.6 5.4 219
P:\Proj\60313.01 5\,june-OO-t03 .xis Page 24 of 26
---- ---------------Table 3. Data from Monitoring Wells Used for Evaluation of Monitored Natural Attenuation 10/27/00
FCX-Statesville Superfund Site OU3
Well Information Nutrients Geochemical Parameters
e
Monitoring Screened Sampling
Well Zone Well Type Depth Date TOC Phosphale TKN Ammonium Nitralei Nitrite Conductivity Temperature pH Eh
(ft) (mgll) (mgll) (mgll) (mg/L) (mgll) (µmhos) ("C) (unitless) (mv)
W-30i North Plume Intermediate 37.5-47.5 12/1/95
W-30i North Plume Intermediate 37.5-47.5 4130/98 14 0.078 u 1.2 u 409 18 9.3 -230
W-30i North Plume lntenmediate 37.5-47.5 12/19/98 5.4 u 295 16 8.4 162
W-30i North Plume Intermediate 37.5-47.5 1/26/99
W-30i North Plume Intermediate 37.5-47.5 1/27/99
W-30i North Plume Intermediate 37.5-47.5 6/9/99 4.8 u 370 20 8.4 -245
W-30i North Plume Intermediate 37.5-47.5 12/8/99 3.7 u 390 14.6 9.3 -353
W-30i North Plume Intermediate 37.5-47.5 617/00 3.4 <0.25 390 17.4 9.9 -325
W-31s North Plume Shallow 5-15 11/1/98
W-31s North Plume Shallow 5-15 11/19/98 u 0.16 u u 125 18 6.9 -SB
W-31s Dup North Plume Shallow 5-15 11/19/98 u 0.29 u u 125 18 6.9 -63
W-31s North Plume Shallow 5-15 12/16/98 u 0.50 130 18 6.7 142
W-31s' North Plume Shallow 5-15 6f//99 u u 120 16 7.6 257
W-31s' North Plume Shallow 5-15 6/10/99 1.4 0.89 110 14.5 6.9 342
W-31s North Plume Shallow 5-15 12/6/99 u 0.95 120 16.9 6.4 188
W-31s Dup North Plume Shallow 5-15 12/16/99 u u 0.51 130 18 6.7
W-31s North Plume Shallow 5-15 6/5/00 <1.0 1.7 100 16.2 6.2 101
W-31i North Plume lntenmediate 34-44 11/1/98
W-31i North Plume Intermediate 34-44 11/19/98 u u 0.50 85 17 7.0 -118
W-31i North Plume Intermediate 34-44 12/16/98 u 0.60 80 16 7.0 142
W-31i North Plume Intermediate 34-44 6f//99 u 0.93 210 15 7.7 119
W-31i North Plume Intermediate -----. -34-44 12/6/99-· -1.9-0.56 120 15.6 6.8 107
-W-31I--Noitli Plume Intermediate 34-44 6/5/00 1.3 0.45 100 16.9 7.1 126
W-32i South Plume Intermediate 112-132 11/1/98
W-32i South Plume lntenmediate 112-132 11/19/98 u u u u 0.59 160 17 8.8 -102
W-32i South Plume Intermediate 112-132 12/18/98 1.3 0.74 120 16 8.0 250
W-32i South Plume Intermediate 112-132 6/9/99 2.4 0.53 180 16 8.4 214
W-32i South Plume Intermediate 112-132 1217/99 1.8 0.36 150 14.2 8 109
W-32i South Plume Intermediate 112-132 6/8/00 2.0 0.32 140 16.1 8.6 120
P :\Proj\60313. 015\june-OO-t03 .xis Page 25 of 26
--- -
P:\Proi\60313.015\june--00-t03.xls
-- --.. ------Table 3. Data from Monitoring Wells Used for Evaluation of Monitored Natural Attenuation
FCX-Statesville Superfund Site OU3
TABLE FOOT NOTES·
'Monitoring well W-5s was sampled but not purged; the sample was taken on June 8, 1999, and the NAPS were collected on June 9, 1999.
'voe data for W-20d from September 1998 are DQL Ill.
cMonitoring well W-31s was ~mpled on 6/10/99 using a slower purge rate.
dAdditional aluminum data can be found in Table 3-4 of the Pre-Design Investigation Report
General Notes:
Data qualifiers are as follows:
B indicates the analyte was detected in a blank sample.
D indicates that the result is from a diluted sample.
J indicates the result is estimated.
•-• indicates that there was not an analysis or measurement pelformed.
NR indicates the result is not reportable because it was determined as unusable by the data validator.
U indicates that the result was less than one-fifth of the contract-required quantitation limit (CRQL): the reporting limit precedes the •u• quaLifier.
Elevated DOs may be due to pumping the well dry and then collecting water that has been aerated.
Monitoring well W-12s was dry during December 1998, June 1999, and June 2000 sampling events.
Monitoring well W-22s was dry during the June 1999 sampling: W-17s did not have enough water to purge or sample during the June 1999 sampling. voe data from December 1999 sampling has been rounded to two (2) significant figures.
- ---10/27/00
Page 26 of 26
--------- ------ ----Table 4. Analytical Parameters and Weighting for Preliminary Screening of Natural Attenuation'
FCX-Statesville Superfund Site OU3
Analysis
Oxygen (DO)"
Nitrate•
Iron (II)•
Sulfate•
Sulfide•
Methane•
Oxidation reduction potential•
(ORP) against Ag/AgCI
electrode
Tolaj Orga_r,_i<e <::arb9n (TOC) _
Temperature•
Carbon dioxide
Alkalinity
Chloride"
Hydrogen
P:\P ROJ\60313.01 5~une-00-t04. doc
Most Contaminated
Zone Concentration
< 0.5 mg/L
> 5 mg/L
< 1 mg/L
> 1 mg/L
< 20 mg/L
> 1 mg/L
< 0.5 mg/L
> 0.5 mg/L
<50 mV
<-100mV
5 <pH< 9
5 >pH> 9
> 20 mg/L_
> 2 x background
> 2 x background
> 2 x background
> 1 nM
< 1 nM
Interpretation
Tolerated, suppresses the reductive pathway at higher concentrations
Not tolerated; however, VC may be oxidized aerobically ·
At higher concentrations may compete with reductive pathway
Reductive pathway possible; VC may be oxidized under Fe(lll)-reducing
conditions
Al higher concentrations may compete with reductive pathway
Reductive pathway possible
VC oxidizes
Ultimate reductive daughter product, VC accumulates
Reductive pathway possible
Reductive pathway likely
Optimal range for reductive pathway
Outside optimal range for reductive pathway
_ Carbon and energy source; drives dechlorination; can be natural or anthropogenic
At T > 20°C, biochemical process is accelerated
Ultimate oxidative daughter product
Results from interaction between carbon dioxide and aquifer minerals
Daughter product of organic chlorine
Reductive pathway possible; VC may accumulate
VC oxidized
Point
Value
3
-3
2
3
2
3
0
3
1
2
0
-2
2
1
1
1
2
3
0
Page 1 of2
-------------------Table 4. Analytical Parameters and Weighting for Preliminary Screening of Natural Attenuation•
FCX-Statesville Superfund Site OU3
Analysis
Volatile (VOA) fatty acids
BTEX"
Tetrachloroethene (PCE)
Trichloroethene (TCE)"
Dichloroethene (DCE)"
Vinyl Chloride (VC)"
1, 1, 1-Trichloroethane (TCA)"
Dichloroethane (DCA)"
Carbon Tetrachloride
Chloroethane•
Ethene/Ethane
Chloroform
Dichloromethane
Concentration in
Most Contaminated Zone Interpretation
> 0.1 mg/L
> 0.1 mg/L
> 0.01 mg/L
> 0.1 mg/L
Intermediates resulting from biodegradation of more complex compounds; carbon
and energy source
Carbon and energy source; drives dechlorination
Material released
Material released
Daughter of product of PCE
Material released
Daughter product of TCE; if amount of cis is greater than 80% of total DCE it is
likely a daughter product. 1, 1-DCE can be chemical reaction product of TCA
Material released
Daughter product of DCE
Material released
Daughter product of TCA under reducing conditions
Material released
Daughter product of DCA or VC under reducing conditions
Daughter product of VC/ethene
Daughter product of VC/ethene
Material released
Daughter product of Carbon Tetrachloride
Material released
Daughter product of Chloroform
Point
Value
2
2
0
0
2c
0
2c
0
2
0
2
2
3
0
2
0
2
'Based on "Technical Protocol for Evaluating Natural Attenuation of Chlorinated Solvents in Ground Water" EPA/600/R-98/128, September 1998.
"Required analysis.
cPoints awarded only if it can be shown that the compound is a daughter product (i.e., not a constituent of the source NAPL).
P:\PROJ\60313.01 5~une..Q0-t04.doc Page2of2
- - - - ------ --- - -----Table 5. Application of USEPA Screening Method to Groundwater Sampling Results from December 1998 and January 1999'
FCX-Statesville Superfund Site OU3
Background North Shallow Plume Area South Shallow Plume Area
W-12s W-17s W-19s W-20s W-31s W-5s W-22s W-24s
Parameter Units (April 1998) Result Pointsb Result Points Result Points Result Points Result Points Result Points Result Points
Oxygen (DO) mg/L 7.0 4.0 0 NA' 0 4 0 0.4 3 NA NA 4.5 0 0.9 0
Nitrate/Nitrite mg/L 1.7 27 0 NA 0 0.21 2 0.5 2 1.9 0 9 0 0.6 2
Iron (II) mg/L 0.25 0.8 0 NA 0 0.2 0 2.9 3 NA NA 2.2 3 1.2 3
Manganese (II) mg/L o' 0.3 0 NA 0 0 0 0.3 0 NA NA 0.2 0 0.1 0
Sulfate mg/L 5.8 0 2 31 0 NA 0 10 2 0 2 NA 0 3.3 2
Sulfide mg/L 0 NA 0 NA 0 0 0 0 0 0 0 0 0 0 0
Methane mg/L 0 0.0019 0 0.00034 0 0.000097 0 0.0038 0 0.0062 0 0.00026 0 0.051 0
Eh(ORP) mV 305 252 0 NA 0 252 0 142 0 NA 0 230 0 240 0
TOG mg/L 0 0 0 1.3 0 0 0 0 0 5.6 0 0 0 1.2 0
Carbon Dioxide mg/L 24 32 0 NA 0 14 0 26 0 234 60 1 90
Alkalinity mg/L 0 3.9 1 15 1 33 1 64 1 7.6 0 0 14
Chloride mg/L 1.9 29 2 34 2 0 0 5.5 2 5.3 2 8.4 2 29 2
Phosphate mg/L 0 NA 0 NA 0 NA 0 NA 0 NA 0 NA 0 NA 0
TKN mg/L 0 NA 0 NA 0 NA 0 NA 0 NA 0 NA 0 NA 0
Ammonium mg/L 0 NA 0 NA 0 NA 0 NA 0 NA 0 NA 0 NA 0
Conductivity µmhos 43.7 300 0 NA 0 55 0 130 0 NA 0 85 0 NA 0
Temperature 'C 19.3 23 NA 0 15 0 18 0 NA 0 18 0 NA 0
pH 4.9 4.4 -2 NA 0 6.9 0 6.7 0 NA 0 4.7 -2 NA 0
VOA Fatty Acids mg/L 5.7 3 2 3 2 3 2 3 2 6 2 3 2 3 2
PCE mg/L 0 72 0 0.250 0 0.0270 0 0 0 0 0 0.004 0 0 0
TCE mg/L 0 0 0 0.005 2 0.001 2 0 0 0.053 2 0 0 0 0
cis-1,2-DCE mg/L 0 0 0 0 0 0.004 2 0.00004 2 1.6 2 0.002 2 0 0
Vinyl Chloride mg/L 0 0 0 0 0 0 0 0 0 0.05 0 0.0004 2 0 0
Ethene/Ethane mg/L 0 0.0002 0 0.0001 0 0.00001 0 0.0003 0 0.0003 0 0.00002 0 0.00004 0
1,1,1-TCA mg/L 0 0 0 0 0 0 0 0 0 0.085 0 0.0006 0 0 0
1,1-0CA mg/L 0 0 0 0 0 0 0 0 0 0.270 2 0.0006 2 0.0002 2
1,1-DCE mg/L 0 0 0 0.0003 2 0 0 0 0 0.Q76 2 0 0 0.0001 2
Total Points Awarded (Score): 6 g• 9 17 16 12 17
p:\PROJ\60313.015'4une-OO-t05.xls Page 1 of 2
- --- - ---- -- ---- - ---Table 5. Application of USEPA Screening Method to Groundwater Sampling Results from December 1998 and January 1999•
FCX-Statesville Superfund Site OU3
North Intermediate Plume Area South Intermediate Plume Area
Background W-28i W-30i W-20i W-31i W-5i W-22i W-29i W-32i
Parameter Units W-12i Result Points Result Points Result Points Result Points Result Points Result Points Result Points Result Points
Oxygen (DO) mg/L 3.5 2.5 0 0.3 3 0 0.6 0 NA NA 0 4 0 0
Nitrate/Nitrite mg/L 3.1 0.52 2 0 2 0.07 2 0.6 2 0 2 4 0 7.5 0 0.74 2
Iron (II) mg/L 0.1 0.1 0 0.7 0 0 0 0.1 0 0.2 0 1.9 3 0 0 0 0
Manganese (II) mg/L NA 0 0 0.1 0 0 0 0.15 0 0 0 0 0 0 0 0.1 0
Sulfate mg/L 46 24 0 NA 0 13 2 6.6 2 NA NA NA 0 NA 0 10 2
Sulfide mg/L NA 0 0 0.3 0 0 0 0 0 0 0 0 0 0 0 0 0
Methane mg/L 0.0022 0.0015 0 0.0014 0 0.0014 0 0.0008 0 0.00056 0 0.0011 0 0.00026 0 0.0005 0
Eh (ORP) mV 22 NA 0 162 0 199 0 142 0 132 0 136 0 239 0 250 0
TOC mg/L 0 2.5 0 5.4 0 0 0 0 0 0.0 0 1.3 0 0 0 1.3 0
Carbon Dioxide mg/L 55 NA 0 18 0 16 0 10 0 38 0 100 0 60 0 16 0
Alkalinity mg/L 31 120 140 1 64 31 0 52 0 45 0 8.7 0 67 1
Chloride mg/L 31 3.2 0 22 0 36 0 1.5 0 1.3 0 14 0 21 0 1.9 0
Phosphate mg/L NA NA 0 NA 0 NA 0 NA 0 NA 0 NA 0 NA 0 NA 0
TKN mg/L NA NA 0 NA 0 NA 0 NA 0 NA 0 NA 0 NA 0 NA 0
Ammonium mg/L NA NA 0 NA 0 NA 0 NA 0 NA 0 NA 0 NA 0 NA 0
Conductivity µmhos 200 220 0 295 0 190 0 80 0 120 0 140 0 120 0 120 0
Temperature 'C 17 18 0 16 0 15 0 16 0 16 0 19 0 17 0 16 0
pH 5 10 -2 8.4 0 7.6 0 7 0 6.8 0 6 0 4.9 -2 8 0
VOA Fatty Acids mg/L 0 3 2 9 2 0 0 0 0 3 2 3 2 3 2 3 2
PCE mg/L 0.002 0.64 0 0.56 0 1.1 0 0.0001 0 0.028 0 0.11 0 0.032 0 0.0004 0
TCE mg/L 0 0.024 2 0.046 2 0.Q75 2 0 0 0.004 2 0.010 2 0.002 2 0.0002 2
cis-1,2-DCE mg/L 0 0.009 2 0.028 2 0.12 2 0 0 O.Q1 2 0.14 2 0.007 2 0 0
Vinyl Chlonde mg/L 0 0 0 0 0 0 0 0 0 0.0003 2 0.003 2 0.0002 2 0 0
Ethene/Ethane mg/L 0.0003 0.0007 0 0.0006 0 0.0008 0 0.0002 0 0.0005 0 0.00002 0 0.00003 0 0.0002 0
1,1,1-TCA mg/L 0 0 0 0 0 0 0 0 0 0 0 0.012 0 0 0 0 0
1,1-DCA mg/L 0.0005 0 0 0 0 0 0 0 0 0.005 2 0.058 2 0.004 2 0 0
1,1-DCE mg/L 0 0.014 2 0 0 0 0 0 0 0.004 2 0.02 2 0.003 2 0 0
Total Points Awarded (Score): 9 12 9 4 14 15 10 9
1Analytical data used in this table were derived from data presented in Table 3.
bRefer to Table 4 for attenuation point assignment for parameters.
cNA indicates not applicable. -
d•o• was entered for results which were not detected above the reporting limit
9Several parameter.; were not analyzed for.
p:\PRO.l'o0313.01 5\june-00-!05.xls Page 2 of 2
------- -- ----------Table 6. Application of USEPA Screening Method to Groundwater Sampling Results from June 1999•
FCX-Statesville Superfund Site OU3
Background North Shallow Plume Area South Shallow Plume Area
W-12sb W-17s W-19s W-20s W-31s W-5s W-22s W-24s
Parameter Units (April 1998) Result Pointl Result Points Result Points Result Points Result Points Result Points Result Points
Oxygen (DO) mg/L 7.0 NA' o• 4.0 0 3.5 0 1.0 0 1.0 0 NA 0 2.0 0
Nitrate/Nitrite mg/L 1.7 NA 0 0.83 2 0 2 0 2 2.3 0 NA 0 0 2
Iron (II) mg/L 0.25 NA 0 0.4 0 0.2 0 2.1 3 0.3 0 NA 0 2.0 3
Manganese (II) mg/L 0 NA 0 NA 0 0 0 0 0 0.4 0 NA 0 0.3 0
Sullate mg/L 5.8 NA 0 25 0 0 2 0 2 1.8 2 NA 0 0 2
Sulfide mg/L 0 NA 0 NA 0 NA 0 NA 0 NA 0 NA 0 NA 0
Methane mg/L 0 NA 0 0.00033 0 0.000074 0 0.00048 0 0.0045 0 NA 0 0.00034 0
Eh (ORP) mV 305 NA 0 228 0 243 0 257 0 298 0 NA 0 204 0
TOC mg/L 0 NA 0 1.4 0 0 0 0 0 3.6 0 NA 0 1.4 0
Carbon Dioxide mg/L 24 NA 0 73 40 0 NA 0 105 NA 0 55
Alkalinity mg/L 0 NA 0 16 31 43 9.3 1 NA 0 17 1
Chloride mg/L 1.9 NA 0 43 2 1.6 0 5.5 2 4.3 2 NA 0 18 2
Phosphate mg/L 0 NA 0 NA 0 NA 0 NA 0 NA 0 NA 0 NA 0
TKN mg/L 0 NA 0 NA 0 NA 0 NA 0 NA 0 NA 0 NA 0
Ammonium mg/L 0 NA 0 NA 0 NA 0 NA 0 NA 0 NA 0 NA 0
Conductivity µmhos 43.7 NA 0 230 0 60 0 120 0 70 0 NA 0 90 0
Temperature 'C 19.3 NA 0 16 0 16 0 16 0 22.5 NA 0 15.5 0
pH 4.9 NA 0 5.5 0 6.1 0 7.6 0 6.8 0 NA 0 5.9 0
VOA Falty Acids mg/L 5.7 NA 0 NA 0 NA 0 NA 0 NA 0 NA 0 NA 0
PCE mg/L 0 NA 0 0.33 0 0.048 0 0 0 0.19 0 NA 0 0.0005 0
TCE mg/L 0 NA 0 0.0074 2 0.0019 2 0 0 0.057 2 NA 0 0 0
cis-1,2-DCE mg/L 0 NA 0 0 0 0.0051 2 0 0 1.1 2 NA 0 0 0
Vinyl Chloride mg/L 0 NA 0 0 0 0 0 0 0 0 0 NA 0 0 0
Elhene/Elhane mg/L 0 NA 0 0 0 0 0 0 0 0.000135 0 NA 0 0 0
1,1,1-TCA mg/L 0 NA 0 0 0 0 0 0 0 0.094 0 NA 0 0 0
1,1-DCA mg/L 0 NA 0 0 0 0 0 0 0 0.24 2 NA 0 0 0
1,1-DCE mg/L 0 NA 0 0 0 0 0 0 0 0.072 2 NA 0 0 0
To1al Poin1s Awarded (Score): NA B 9 10 15 NA 11
P:\PROJ\60313.015\iune-OO-t06.xls Page 1 of 2
---- ---.. ----- --- ---Table 6. Application of US EPA Screening Method to Groundwater Sampling Results from June 1999'
FCX-Statesville Superfund Site OU3
North Intermediate Plume Area South Intermediate Plume Area
Background W-28i W-30i W-20i W-31i W-5i W-22i W-29i W-32i
Parameter Units W-12i Result Points Result Points Result Points Result Points Result Points Result Points Result Points Results Points
Oxygen (DD) mg/1. 3.0 0.5 0 0.6 0 1.1 0 0.6 0 2.0 0 0.8 0 4.0 0 0.8 0
Nitrate/Nitrite mg/1. 3.3 0 2 0 2 0.48 2 0.93 2 0 2 2.9 0 5.8 0 0.53 2
Iron (11) mg/1. 0 0 0 0.4 0 0.1 0 0.8 0 0.4 0 1.6 3 0.1 0 0.1 0
Manganese (11) mg/1. 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
Sulfate mg/l 0 29 0 35 0 9.8 2 15 2 19 2 1.3 2 0 2 8.8 2
Sulfide mg/1. NA NA 0 NA 0 NA 0 NA 0 NA 0 NA 0 NA 0 NA 0
Methane mg/1. 0.0017 0.00066 0 0.0017 0 0.0016 0 0.0002 0 0.00048 0 0.033 0 0.00033 0 0.00061 0
Eh(DRP) mV -168 280 0 -245 2 227 0 119 0 320 0 145 0 228 0 214 0
TDC mg/1. 0 3.6 0 4.8 0 0 0 0 0 3.6 0 2.4 0 1.4 0 2.4 0
Carbon Dioxide mg/1. 120 NA 0 5 0 20 0 15 0 60 0 85 0 80 0 20 0
Alkalinity mg/1. 32 130 1 130 1 61 0 58 0 51 0 57 0 12 0 62 0
Chloride mg/1. 28 4.3 0 19 0 23 0 2.5 0 2.4 0 9.9 0 15 0 2.6 0
Phosphate mg/1. NA NA 0 NA 0 NA 0 NA 0 NA 0 NA 0 NA 0 NA 0
TKN mg/1. NA NA 0 NA 0 NA 0 NA 0 NA 0 NA 0 NA 0 NA 0
Ammonium mg/1. NA NA 0 NA 0 NA 0 NA 0 NA 0 NA 0 NA 0 NA 0
Conductivity µmhos 200 390 0 370 0 210 0 210 0 150 0 170 0 110 0 180 0
Temperature •c 20 19 0 20 0 16 0 15 0 19 0 16 0 16 0 16 0
pH 6 10.5 -2 8.4 0 7.3 0 7.7 0 7.7 0 6.3 0 5.6 0 8.4 0
VOA Fatty Acids mg/1. 0 NA 0 NA 0 NA 0 NA 0 NA 0 NA 0 NA 0 NA D
PCE mg/1. 2.5 0.25 0 1.1 0 0.44 0 0 0 0.048 0 0.086 0 0.05 0 0.00063 0
TCE mg/1. 0 0.04 2 0.071 2 O.D3 2 0 0 0.0046 2 0.011 2 0.005 2 0.00022 2
cis-1,2-0CE mg/1. 0 0.0,5 2 0.034 2 0.023 2 0 0 0.0069 2 0.096 2 0.0079 2 0 0
Vinyl Chloride mg/1. 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
Ethene/Ethane mg/1. 0.000026 0.00096 0 0.00144 0 0.000053 0 0 0 0.000163 0 0.000952 0 0.000041 0 0.00017 0
1,1,1-TCA mg/1. 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
1,1-DCA mg/1. 0.0005 0 0 0 0 0 0 0 0 0.0045 2 0.046 2 0.0047 2 0 0
1,1-DCE mg/1. 0 0 0 0 0 0 0 0 0 0.0046 2 0.011 2 0.0044 2 0 0
Total Points Awarded (Score): 5 9 8 4 12 13 10 6
aAnalytical data used in this table were derived from data presented in Table 3.
bDue to the unavailability of W-12s data from the June 1999 sampling event background well data are presented from the previous sampling event
cRefer to Table 4 for attenuation point assgnment for parameters.
dNA indicates not applicable.
9•0· was entered for results which were not detected above the reporting limit
P :\PROJ\B0313.015\june-00-t06.xls Page 2 of 2
---- --1111 - ---- --- ----Table 7. Application of USEPA Screening Method to Groundwater Sampling Results from December 1999'
FCX-Statesville Superfund Site OU3
Background North Shallow Plume Area South Shallow Plume Area
W-12s' W-17s W-19s W-20s W-31s W-5s W-22s W-24s
Parameter Units (Apnl 1998) Result Pointsc Result Points Result Points Result Points Result Points Result Points Result Points
Oxygen (DO) mg/L 7.0 NA' o• 2.0 0 5 0 1.0 0 1.0 0 NA 0 1.0 0
Nitrate/Nitrite mg/L 1.7 NA 0 1.2 0 0.37 2 0.95 2 2.6 0 5.9 0 0.55 2
Iron (II) mg/L 0.25 NA 0 0.1 0 0.1 0 1.6 3 1.6 3 NA 0 1.5 3
Manganese (II) mg/L 0 NA 0 0 0 0.1 0 0.3 0 0.3 0 NA 0 0.1 0
Sulfate mgll 5.8 NA 0 17 2 1.3 2 3.8 2 2.3 2 1.3 2 0 2
Sulfide mg/L 0 NA 0 NA 0 NA 0 NA 0 NA 0 NA 0 NA 0
Methane mg/L 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
Eh (ORP) mV 305 NA 0 326 0 321 0 188 0 205 0 NA 0 237 0
TOG mgll 0 NA 0 0 0 0 0 0 0 6.4 0 1 0 0 0
Carbon Dioxide mg/l 24 NA 0 55 14 0 20 0 85 NA 0 80
Alkalinity mg/l 0 NA 0 13 1 37 1 39 1 7.8 1 <1.0 0 14
Chloride mg/l 1.9 NA 0 48 2 2 0 3.1 0 4.7 2 7.3 2 12 2
Phosphate mgll 0 NA 0 NA 0 NA 0 NA 0 NA 0 NA 0 NA 0
TKN mg/L 0 NA 0 NA 0 NA 0 NA 0 NA 0 NA 0 NA 0
Ammonium mg/L 0 NA 0 NA 0 NA 0 NA 0 NA 0 NA 0 NA 0
Conductivity µmhos 43.7 490 0 270 0 80 0 120 0 70 0 120 0 130 0
Temperature 'C 19.3 21.1 1 16.6 0 13.5 0 16.9 0 17.4 1 16.4 0 13 0
pH 4.9 4.5 -2 5.4 0 6.6 0 6.4 0 4.9 -2 4.8 -2 5.8 0
VOA Fatty Acids mg/L 5.7 NA 0 13 2 8.8 2 0 0 13 2 0 0 0 0
PCE mg/L 0 108.7 0 0.42 0 0 0 0 0 0.221 0 0.011 0 0.002 0
TCE mg/l 0 0 0 0.011 2 0.0029 2 0 0 0.075 2 0.0002 2 0 0
cis-1,2-DCE mg/L 0 0.5097 2 0.022 2 0.008 2 0 0 1.12 2 0.003 2 0.0003 2
Vin~ Chlonde m9/l 0 0 0 0 0 0 0 0 0 0 0 0.00043 2 0 0
Ethene/Ethane mg/l 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
1,1,1-TCA mg/L 0 0 0 0 0 0 0 0 0 0.128 0 0.0008 0 0 0
1,1-DCA mg/l 0 0 0 0 0 0 0 0 0 0.284 2 0.001 2 0.0003 2
1,1-DCE mg/L 0 0 0 0 0 0 0 0 0 0.073 2 0.001 2 0.0002 2
Total Points Awarded (Score): NA 12 11 8 18 12 17
P:\PROJ\60313.01 ~une-00--t07 .xis Page 1 of 2
------------ - -- ----Table 7. Application of USEPA Screening Method to Groundwater Sampling Results from December 1999•
FCX-Statesville Superfund Site OU3
North lntennediate Plume Area South Intermediate Plume Area
Background W-28i W-30i W-20i W-31i W-5i W-22i W-29i W-32i
Parameter Uni1s W-12i Result Points Result Points Result Points Result Points Result Points Result Points Result Points Results Points
Oxygen (DO) mg/I. 4.0 0.8 0 0.9 0 0.8 0 0.6 0 1.5 0 1.0 0 3.0 0 1.0 0
Nitrate/Nitrite mg/I. 2.9 0.44 2 0 2 0.71 2 0.56 2 0.26 2 3.2 0 6 0 0.36 2
Iron (11) mg/I. 0.3 0 0 0.1 0 0.1 0 0.3 0 2.5 3 3.1 3 0.1 0 0.1 0
Manganese (II) mg/I. 0.1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
Sulfate mg/I. 32 14 2 27 0 13 2 9.7 2 18 2 2.6 2 2.3 2 10 2
Sulfide mg/I. NA NA 0 NA 0 NA 0 NA 0 NA 0 NA 0 NA 0 NA 0
Methane mg/I. 0 0 0 0 0 0 0 0 0 0 0 420 3 0 0 0 0
Eh(ORP) mV -90 41 1 -353 2 -199 2 107 0 100 0 94 0 331 0 109 0
TDC mg/I. 1.1 2.5 0 3.7 0 0 0 1.9 0 0.0 0 0.0 0 0 0 1.8 0
Carbon Dioxide mg/I. 30 saturated saturated 10 0 10 0 20 0 65 45 0 8 0
Alkalinity mg/I. 33 120 140 1 68 1 30 0 56 0 53 0 9.4 0 61 0
Chlonde mg/I. 33 2.6 0 21 0 35 0 1.7 0 2.2 0 7.9 0 19 0 2.5 0
Phosphate mg/I. NA NA 0 NA 0 NA 0 NA 0 NA 0 NA 0 NA 0 NA 0
TKN mg/I. NA NA 0 NA 0 NA 0 NA 0 NA 0 NA 0 NA 0 NA 0
Ammonium mg/I. NA NA 0 NA 0 NA 0 NA 0 NA 0 NA 0 NA 0 NA 0
Conductivity µmhos 260 270 0 390 0 250 0 120 0 140 0 220 0 180 0 150 0
Temperature 'C 15.6 15.9 0 14.6 0 13.6 0 15.6 0 16.4 0 NA 0 15.4 0 14.2 0
pH 5.7 9.9 -2 9.3 -2 7.4 0 6.6 0 6.5 0 6.2 0 5.6 0 8 0
VOA Faity Acids mg/I. 70 0 0 11 2 13 2 0 0 5.5 2 0 0 5.5 2 83 2
PCE mg/I. 2.197 0.307 0 1 0 0.265 0 0 0 0.055 0 0.065 0 0.052 0 0.001 0
TCE mg/I. 0 0.043 2 0.071 2 0.025 2 0 0 0.006 2 0.008 2 0.003 2 0.0003 2
cis-1,2-DCE mg/I. 0 0.014 2 0.03 2 0.019 2 0 0 0.0, 2 0.077 2 0.008 2 0 0
Vinyl Chloride mg/I. 0 0 0 0 0 0 0 0 0 0 0 0.0 0 0 0 0 0
Ethene/Ethane mg/I. 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
1,1,1-TCA mg/I. 0 0 0 0 0 0 0 0 0 0 0 0.005 0 0 0 0 0
1,1-0CA mg/I. 0.5859 0 0 0 0 0 0 0 0 0.008 2 0.04 2 0.006 2 0 0
1,1-DCE mg/I. 0.1656 0 0 0 0 0 0 0 0 0.007 2 0 2 0.004 2 0 0
Total Points Awarded (Score): 9 10 13 4 17 17 12 8
8Analytical data used in this table were derived from data presented in Table 3.
bOue to the unavailability of W-12s data from the December 1999 sampling event background well data are presented from a previous sampling event
eRefer to Table 4 for attenuation point assignment for parameters.
dNA indicates not applicable.
'•o· was entered for results which were not detected above the reporting limit
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-- ------- --- --- ----Table 8. Application of US EPA Screening Method to Groundwater Sampling Results from June 2000'
FCX-Statesville Superfund Site OU3
Background North Shallow Plume Area South Shallow Plume Area
W-12s" W-17s W-19s W-20s W-31s W-5s W-22s W-24s
Parameter Units (Apnl 1998) Result Pointsc Result Points Result Points Resull Points Result Points Result Points Result Points
Oxygen (00) mg/L 7.0 NA' O' 1 0 3 0 0 1 0 NA 0 3 0
Nitrate/Nitrite mg/L 1.7 NA 0 0.94 2 0 2 1.7 0 3.2 0 6.9 0 0 2
Iron (11) mg/L 0.25 NA 0 0.2 0 0.2 0 1.1 3 0.5 0 NA 0 3 3
Manganese (11) mg/L 0 NA 0 0 0 0 0 0 0 0.3 0 NA 0 0.3 0
Sulfate mg/L 5.8 NA 0 19 2 1.1 2 3.9 2 1.6 2 1.6 2 100 0
Sulfide mg/L 0 NA 0 NA 0 NA 0 NA 0 NA 0 NA 0 NA 0
Methane mg/L 0 NA 0 0 0 0 0 0 0 0 0 0 0 16 3
Eh (ORP) mV 305 NA 0 129 0 273 0 101 0 85 0 NA 0 209 0
TOG mg/L 0 NA 0 0 0 0 0 0 0 6.1 0 1.1 0 1 .5 0
Carbon Dioxide mg/L 24 NA 0 55 15 0 25 0 85 NA 0 65
Alkalinity mg/L 0 NA 0 18 1 34 32 1 10 1 5.7 1 15
Chloride mg/L 1.9 NA 0 44 2 1.8 0 3.4 0 5.2 2 6.8 2 28 2
Phosphate mg/L 0 NA 0 NA 0 NA 0 NA 0 NA 0 NA 0 NA 0
TKN mg/L 0 NA 0 NA 0 NA 0 NA 0 NA 0 NA 0 NA 0
Ammonium mg/L 0 NA 0 NA 0 NA 0 NA 0 NA 0 NA 0 NA 0
Conductivity µmhos 43.7 NA 0 270 0 80 0 100 0 80 0 120 0 210 0
Temperature "C 19.3 NA 0 17.7 0 14.5 0 16.2 0 19.4 0 18.3 0 16.9 0
pH 4.9 NA 0 5.6 0 6.7 0 6.2 0 5.0 0 4.5 -2 5.5 0
VOA Fatty Acids mg/L 5.7 NA 0 0 0 0 0 0 0 0 0 0 0 16 2
PCE mg/L 0 70 0 0.62 0 O.Q35 0 0 0 0.19 0 0.058 0 0.00055 0
TCE mg/L 0 0 0 0.013 2 0.0013 2 0 0 0.05 2 0 0 0 0
cis-1,2-0CE mg/L 0 2 0.025 2 0.0048 2 0 0 1. 1 2 0 0 0 0
Vin~ Chlonde mg/L 0 0 0 0 0 0 0 0 0 0 0 0.00023 2 0 0
Ethene/Ethane mg/L 0 NA 0 0 0 0 0 0 0 0 0 0 0 0 0
1,1,1-TCA mg/L 0 0 0 0 0 0 0 0 0 0.1 0 0 0 0 0
1,1-0CA mg/L 0 0 0 0 0 0 0 0 0 0.220 2 0 0 0 0
1,1-0CE mg/L 0 0 0 0 0 0 0 0 0 0.064 2 0.00071 2 0 0
Total Points Awarded (Score): NA 12 9 6 14 7 14
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---- - - - - - --- -------Table 8. Application of USEPA Screening Method to Groundwater Sampling Results from June 2000•
FCX-Statesville Superfund Site OU3
North Intermediate Plume Area South Intermediate Plume Area
Background W-28i W-30i W-20i W-31i W-5i W-22i W-29i W-32i
Parameter Units W-12i Result Points Result Points Result Points Result Points Result Points Result Points Result Points Results Points
Oxygen (DO) mg/I. 3 0.3 3 0.05 3 0.8 0 0.6 0 1.0 0 NA NA 3.0 0 0.2 3
Nitrate/Nitrite mg/I. <.25 0.32 2 0 2 0 2 0.45 2 0.32 2 NA NA 6.8 0 0.32 2
Iron (II) mg/I. 0.25 0 0 0.1 0 0.2 0 0.25 0 0 NA NA 0.2 0 0.5 0
Manganese (II) mg/I. 0 0 0 0 0 0 0 0 0 0 0 NA NA 0 0 0 0
Sulfate mg/I. 11 12 2 32 0 13 2 9.6 2 18 2 NA NA 1.6 2 9.6 2
Sulfide mg/I. 0 NA 0 NA 0 NA 0 NA 0 NA 0 NA NA NA 0 NA 0
Methane mg/I. 230 0 0 0 0 130 3 0 0 0 0 NA NA 0 0 0 0
Eh(ORP) mV -124 120 0 -325 2 163 0 126 0 114 0 NA NA 219 0 120 0
TOC mg/I. 28 2.3 0 3.4 0 1.6 0 1.3 0 1.7 0 NA NA 0 0 2 0
Carbon Dioxide mg/I. 50 saturated saturated 10 0 15 0 40 0 NA NA 50 0 5 0
Alkalinity mg/I. 50 150 1 190 64 0 33 0 59 0 NA NA 10 0 68 0
Chloride mg/I. 33 2.8 0 23 0 30 0 1.6 0 2.4 0 NA NA 21 0 2 0
Phosphate mg/I. NA NA 0 NA 0 NA 0 NA 0 NA 0 NA NA NA 0 NA 0
TKN mg/I. NA NA 0 NA 0 NA 0 NA 0 NA 0 NA NA NA 0 NA 0
Ammonium mg/I. NA NA 0 NA 0 NA 0 NA 0 NA 0 NA NA NA 0 NA 0
Conductivity µmhos 280 380 0 390 0 250 0 100 0 140 0 NA NA 180 0 140 0
Temperature 'C 18.8 21.9 1 17.4 0 15.4 0 16.9 0 19.3 0 NA NA 18.6 0 16.1 0
pH 6.0 10.6 -2 9.9 -2 7.6 0 7.1 0 6.9 0 NA NA 5.4 0 8.6 0
VOA Fatty Acids mg/I. 39 39 2 16 2 0 0 0 0 39 2 NA NA 0 0 0 0
PCE mg/I. 1.3 0.58 0 0.81 0 0.23 0 0 0 0.073 0 NA NA 0.06 0 0.00059 0
TCE mg/I. 0 0.033 2 0.059 2 0.02 2 0 0 0.0067 2 NA NA 0.0017 2 0 0
cis-1,2-0CE mg/I. 0 0.011 2 0.034 2 O.Q16 2 0 0 0.012 2 NA NA 0.0098 2 0 0
Vinyl Chloride mg/I. 0 0 0 0 0 0.00019 2 0 0 0 0 NA NA 0 0 0 0
Ethene/Ethane mg/I. 0 0 0 0 0 0 0 0 0 0 0 NA NA 0 0 0 0
1,1,1-TCA mg/I. 0 0 0 0 0 0 0 0 0 0 0 NA NA 0 0 0 0
1,1-0CA mg/I. 0 0 0 0 0 0 0 0 0 0.008 2 NA NA 0.0069 2 0 0
1,1-0CE mg/I. 0 0.007 2 0.0021 2 0.00034 2 0 0 0.011 2 NA NA 0.004 2 0 0
Total Poin1s Awarded (Score): 16 15 15 4 14 NA 10 7
'Analytical data used in this table were derived from data presented in Table 3.
bOue to the unavailability of W-12s data from the June 2000 sampling evenL background well data are presented from a previous sampling event
cRefer to Table 4 for attenuation point assignment for parameters.
dNA indicates not applicable.
e•o• was entered for results which were not detected above the reporting limit
P;\PROJ\60313.015'-june-00-108.xls Page 2 of 2
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Table 9. Interpretation of Points Awarded during Screening Process of Natural Attenuation'
FCX-Statesville Superfund Site OU3
Score
Oto 5
6 to 14
15 to 20
>20
Interpretation
Inadequate evidence for biodegradation of chlorinated organics
Limited evidence for biodegradation of chlorinated organics
Adequate evidence for biodegradation of chlorinated organics
Strong evidence for biodegradation of chlorinated organics
'Taken from "Technical Protocol for Evaluating Natural Attenuation of Chlorinated Solvents in Ground
Water", EPA/600/R-98/128, September 1998.
P: \P ROJ\60313.01 5~une-00-t09. doc Page 1 of 1