DEQ-CFW_00001217

Division of Water Quality
January 23, 2008
MEMORANDUM
To: Elizabeth Kountis
From: Harold Quidley X(
Laura Spell
Through: Jimmie Overtola
Subject: Cape Fear River Reclassification Study 2007
(subbasins 03-06-15 and 03-06-16)
Findings: 1. Based on fecal coliform sampling (5 events in 30 days), one-time chemical sampling and
review of historical DWQ Ambient Monitoring data, the Cape Fear River in the designated study
area will meet Water Supply IV standards during normal seasonal flow conditions.
2. A single parameter (Bromodichloromethane) was found at levels slightly above the DWQ
water quality standard of 0.55 µg/L in 3 volatile organic (VOA) samples collected in the lower
study reach.
3. It should be noted that the reduction of dilution of the Cape Fear River, in association with the
ongoing drought might have attributed to the slightly increased Bromodichloromethane levels
detected during the study.
Background:
At your request, the Intensive Survey Unit (DWQ) conducted a reclassification study in an approximate 10-mile
reach of the Cape Fear River in Bladen and Cumberland Counties, The Lower Cape Fear River Water and
Sewer Authority (LCFWASA) has requested that the section be reclassified from C to Water Supply -IV [WS-IV
CA and WS-IV (PA)]. The request states that the reclassification is needed in order to install a raw water
(supply) intake. If approved, the raw water intake would supply a 4 MGD surface water treatment plant
(SWTP). The initial water to be withdrawn would be used by Smithfield Packing for all requirements of pork
processing and employee use. The study area includes a 9.97 mile river segment from (Lat34.9601 I I Long —
78.815278) downstream to (Lat 34.771389 Long-78.797778) near Tar Heel. The proposed intake is located
approximately 1 mile upstream from SR1316 (Myers St. Tar heel).
Drought and hydrology information:
The Cape Fear River reclassification study request was received by the ISU during March 2007, however due to
the extreme drought persisting throughout the summer and fall, field sampling was repeatedly postponed to
assure that study results would reflect water quality in the Cape Fear River during normal seasonal conditions.
During October 2007 it was decided to proceed with a preliminary study even though extreme drought and
unusually low water levels continued to affect the region. On 12/04/07 ISU staff completed the 5-week study
that included physical profiles and chemical sampling at 7 sites in the requested reclassification reach of the
Cape Fear River, (Station Locations Table 1 and Map Figure 1). Resulting data from the study will also be used
as part of the ongoing drought monitoring effort being conducted by DWQ during 2007-2008. A review of 25-
years of USGS data for William O'Huske Lock and Dam #3 indicates that the mean of monthly discharges for
Environmental Sciences Branch rr utur vuuuay uci cwii
DEQ-CFW 00001217

the month of November is 3,020 cfs with a range from 978.3 cfs to 10,190 cfs. Preliminary data from the USGS
site for the month of November 2007 (Cape Fear Reclassification Study) indicates that the mean monthly
discharge was < 600 cfs. A total of 0.23 inches of precipitation was recorded at the Lock during the study with
a maximum of 0.17 inches occurring during one event on 11/15/07. River stage remained relatively stable
throughout the study with gage height measurements fluctuating within a relatively narrow range of 0.17 inches.
Mean discharge, gage height (stage) and precipitation data (USGS 02105500 Cape Fear River at William 0'
Huske Lock nr Tar Heel, NC) for the month of November 2008 can be found in Table 2.
Table 1 Cape Fear River Reclassification Study Site Locations
CPF1 Cape Fear River at upper boundary of requested reclassification reach. Cumberland Co.
Lat 34.906111 Long-78.815278
CPF2
Cape Fear River 0.3 miles downstream from the mouth of Grays Creek.
Cumberland Co.
Lat 34.887694 Long-78.815639
CPF3
Cape Fear River 1.5 miles upstream from Willis Creek.
Cumberland Co.
Lat 34.872028 Long-78.819444
CPF4
Cape Fear River 250 feet upstream William O'Huske Lock and Dam 3.
Bladen Co.
Lat 34.837083 Long-78.823111
CPF5
Cape Fear River 0.73 miles downstream from Georgia Branch.
Bladen Co.
Lat 34.807056 Long-78.813611
CPF6
Cape Fear River 0.48 miles downstream from UT
Bladen Co.
Lat 34.789111 Long-78.801167
CPF7
Cape Fear River at lower boundary of requested reclassification reach.
Bladen Co.
Lat 34.771389 Long-78.797778
Study Parameters:
1. Physical profiles (dissolved oxygen, temperature, pH and conductivity) measured at the surface, mid -depth
and bottom at each site during each sampling event.
2. Fecal coliform samples collected weekly at each site during study, (5 sampling events conducted during a 30-
day period).
3. A one-time sampling event at each site for water chemistry consisting of the following parameters:
Nitrogen & Phosphorus, (NH3, TKN, NO2 + NO3, NO3, P-Total)
Sulfate
Methylene -Blue -Active Substances (MBAS)
Metals (nickel, calcium and magnesium)
Organochlorine Pesticides
Acid Herbicides
Base/Neutral & Acid Extractable Organics
Purgeable Organics (VOA)
4. Review of DWQ Ambient Monitoring Station Summary (138305000 Cape Fear River at SR1316 at Tar Heel).
Environmental Sciences Branch
Water guatity Section
DEQ-CFW 00001218

Figure 1
Cape Fear River Reclassification Study Sites - 2007
CPF3
i
v
Lock and Dam #3
r
rS
PF 5
_ Tar Heel Landing at SR 1316
— Ambient Station: 66305000
CPF6
Y
-
�
f.PF7
s
J
,.Till eel
t t
N
�h�51es
DEQ-CFW 00001219

Study Results and Discussion:
Physical Parameters
Physical measurements, (temp, dissolved oxygen, pH and conductivity) were taken at the surface, mid -depth and
bottom during each sampling event at all sites during the study (Table 3). Physical parameters were measured
using a Hydrolab Quanta multi -parameter meter. Meters were calibrated (initial and terminal) using the DWQ
ISU Standard Operating Procedures for Physical and Chemical Monitoring, Version 1.3. Physical profiles
indicated all values to be within acceptable seasonal levels with temperatures gradually decreasing throughout
the month of November. Dissolved Oxygen (D.O.) ranged from 8.01 mg/L to 9.89 mg/L in the study reach with
% saturation levels reaching 90.7% well within the 110% water quality standard. Conductivity values were
typical for this area of the Cape Fear River ranging from 108 umhos/cm to 180 umhos/cm with the lowest values
recorded during the first week of sampling. A storm event occurred during the week proceeding 11/06/07 (1"
sampling event) resulting in an increase in flow and dilution and a subsequent reduction in conductivity values
in the Cape Fear River. Decreasing flow and stage can be seen at Lock and Dam #3 during the first week of the
study (Discharge, Gage Height and Precipitation, Table 2). Values for pH ranged from 6.0 su to 7.9 su at the 7
sites with slightly higher values measured at the surface. These higher values at the surface are likely the result
of minimal algal productivity resulting from increased sunlight in the upper portion of the water column. A
review of DWQ Ambient Monitoring System Station Summaries (Table 4) for station B8305000 (Cape Fear
River at SR1316 at Tar Heel) found that all physical parameters measured during the Cape Fear River
reclassification study were typical of water conditions occurring during the period from 01/15/02 through
12/06/06. DWQ ambient monitoring station B8305000 is located 2.07 miles downstream from CPF7.
Fecal Coliform
One focus of the 2007 study was to assess whether the section of the Cape Fear River would meet fecal coliform
bacteria requirements of a geometric mean of less than 200/100 ml (MF count) based on at least five consecutive
samples examined during any 30-day period. The 7 sampling sites were sampled five consecutive times during a
thirty -day period between 11/06/07 and 12/04/07. The resulting data (Table 3) indicated that the geometric
mean for all six sites did not exceed 200/100 ml and did not exceed 400/100 ml in more than 20% of the
samples. Geometric means for each site were well below the limits and ranged from 5.86 /100 ml to 44.7 with
the highest mean detected at CPF1, the uppermost site. The lowest geometric means occurred at the 3 most
downstream sites CPF5 through CPF7 with geometric means ranging from 5.86 to 8.16/100 ml. These values
are consistent the DWQ Ambient Monitoring System Station Summary for station B8305000 (Table 4) which
provides a geometric mean of 47/100 ml for a total of 58 samples (02/01/31 to 06/12/12).
Chemical Parameters
Chemical sampling was conducted at sites CPF5, CPF6 and CPF7 on 12/03/07 and at sites CPF1, CPF2, CPF3
and CPF4 on 12/04/07. The DWQ Chemistry Laboratory performed all chemical analyses for the Cape Fear
River reclassification study.
Metals samples collected during the Cape Fear River reclassification study included nickel (Ni), calcium (Ca)
and magnesium (Mg). All nickel values were reported as "not detected". Calcium and magnesium results were
used to calculate hardness data for the study. Resulting hardness values ranged from 26.35 mg/L to 27.77 mg/L,
below the water quality standard of 100 mg/L. The DWQ Ambient Monitoring System Station Summary for
station B8305000 at Tar Heel (01/15/02 through 12/06/06) indicated 17 sampling events for the following
metals; aluminum (Al), arsenic (As), cadmium (Cd), chromium (Cr), iron (Fe), lead (Pb), mercury (Hg), nickel
(Ni) and zinc (Zn). Results of arsenic, cadmium, chromium, mercury, lead and nickel were reported as "non
detect" for all samples. A total of 17 copper samples resulted in 2 "non detect" and 2 samples above the action
level standard of 7 µg/L. A total of 17 iron samples resulted in 5 samples greater than the 1.0 mg/L action level
standard. Analysis for Zinc resulted in 11 samples as "non detect" with the remaining 6 samples below the
water quality standard of 50 µg/L. Metals data for the Cape Fear River reclassification study can be found in
Table 4 (Ambient Monitoring System and Station Summary) and Table 5 (Cape Fear River Water Samples —
Nutrients, Metals, MBAS, Sulfate and Hardness).
Environmental Sciences Branch Water Quality Section
DEQ-CFW 00001220

Chlorinated Pesticides
Pesticide samples were collected at each site with analysis resulting in all 51 target compounds reported as "non
detect" (Table 6). All 7 sites, had additional unidentified peaks ranging in numbers from 1 to 9. Unidentified
peaks are usually found in pesticide scans and are not considered significant.
Acid Herbicides
Herbicide sample analysis for each site resulted in all 15 target compounds reported as "non detect" with the
number of unidentified peaks ranging from 5 to <10 (Table 6). Unidentified peaks are usually found in
herbicide scans and are not considered significant.
Semivolatile Organics (BNA's)
Semivolatile Organics samples were collected at each site with analysis resulting in all 66 target compounds
reported as "non detect" with 0 unidentified peaks (Table 6).
Volatile Organics (VOA's)
Volatile organic samples were collected at each site and were analyzed for 60 targeted compounds (Table 6);
Chloroform was detected in all samples and ranged from 0.1 µg/L to 0.91 µg/L with the lowest value detected at
CPF7, the most downstream site. Chloroform is commonly used as a solvent, a reagent and may also be used in
the production of dyes and pesticides. Chloroform values reported for the Cape Fear River reclassification are
below the DWQ water quality standard of 5.6 µg/L.
Bromodichloromethane was detected in VOA samples from all of the Cape Fear River sites with the exception
of CPF4. Reported values for bromodichloromethane were 0.46 µg/L (CPF1), 0.33 µg/L (CPF2), 0.34 µg/L
(CPF3), 0.60 µg/L (CPF5), 0.58 µg/L (CPF6) and 0.61 µg/L (CPF7). Sample results from 3 of the sites listed
above were slightly higher than the DWQ water quality standard of 0.55 µg/L. Most bromodichloromethane is
formed as byproduct when chlorine is added to water -supply systems to kill bacteria.
VOA analysis detected 1,2,4-Trimethylbenzene in samples from Sites CPF6 and CPF7. Trimethylbenzene is
primarily used as a gasoline additive. Trimethylbenzene was detected at 0.37 µg/L at site CPF6 and 0.39 µg/L
at site CPF7, both values well below the DWQ water quality standard of 850 µg/L.
Toluene was detected in very low levels in VOA samples collected at CPF6 (0.12 µg/L) and CPF7 (0.14 µg/L).
Both sample results were qualified as (N3) = Estimated concentration is <PQL and >MDL. Also detected at
very low levels at CPF6 and CPF7 was m,p-Xylene (0.41 and 0.42 respectively). Both sample results were
qualified as (N3) = Estimated concentration is <PQL and >MDL.
Nutrients
Nutrient levels for NH3, TKN, NO2 + NO3, Nitrate and P total were collected at each of the seven sites (Table
5). NH3 values ranged from 0.03 mg/L to 0.05 mg/L and may be considered lower than typically measured in
this reach of the Cape Fear River. This is evident when comparing these values to DWQ Ambient Monitoring
System Station Summaries for station B8305000 (Cape Fear River at SR1316 at Tar Heel) Table 4. This range
of NH3 values fall between the 10`h and 25`h percentile of total observations at the Tar Heel ambient site. This
was likely the result of the drought conditions occurring during the study that provided residence time necessary
for nitrification to take place. This can also be seen in moderately low TKN values (ranging from 1.2 mg/L to
1.5 mg/L) and relatively higher than expected NO2 + NO3 values (ranging from 1.2 mg/L to 1.5 mg/L). Values
for TKN fall between the 10`h and 50`h percentile while NO2 +NO3 values fall in the 90`h percentile indicating
little localized drainage entering the system resulting from low flow conditions. Total phosphorus values ranged
from 0.17 mg/L to 0.23 mg/L and were found at levels normally detected in the area. Nitrate values ranged from
1.2 mg/L to 1.5 mg/L, below the 10.0 mg/L water quality standard for Class WS-IV waters.
Environmental Sciences Branch Water Quality Section
DEQ-CFW 00001221

Additional Chemical Parameters(Sulfate MBAS Fluoride and Chloride)
Sulfate levels were detected in a relatively narrow range of 18 mg/L to 20 mg/L at the study sites, below the 250
mg/L water quality standard for Class WS-IV. MBAS results were found to be at "non detect" levels or at 0.1
mg/L with the water quality standard for Class WS-IV at 0.5 mg/L. Fluoride levels were "non detect" or 0.4
mg/L within the Class WS-IV standard of 1.8 mg/L. Chloride results were reported at 19 mg/L or 20 mg/L at all
sites, below the 250 mg/L water quality standard for Class WS-IV. Sulfate, MBAS, fluoride and chloride data
can be found in Table 5.
cc: Belinda Henson (FRO)
Dianne Reid (Basinwide Plannng Program Unit)
Danny Strickland (FRO)
Environmental Sciences Branch
Water Quality Section
DEQ-CFW 00001222

Table 2. William O'Huske Lock and Dam #3 USGS Site 02105500
Mean Daily Discharge, Gage Height and Precipitation
Date Mean Discharge Mean Gage Height Precipitation
mm/dd/yy cfs ft (stage) in. daily total
11 /06/07
669
1.08
0.00
11107/07
578
0.99
0.00
11 /08107
533
0.94
0.00
11 /09/07
506
0.91
0.00
11 /10/07
520
0,93
0.00
11 /11 /07
528
0.93
0.00
11 /12/07
518
0.92
0.00
11 /13/07
503
0.91
0.00
11 /14107
506
0.91
0,00
11/15/07
517
0.92
0.17
11 /16/07
528
0.93
0.00
11 /17/07
542
0.95
0.00
11 /18/07
546
0.95
0.00
11 /19/07
552
0.96
0.00
11 /20/07
542
0.95
0.00
11 /21 /07
540
0,95
0.00
11 /22/07
546
0.95
0.02
11 /23/07
560
0.97
0.00
11 /24/07
539
0.95
0.00
11 /25/07
519
0.92
0.01
11 /26/07
558
0.97
0.01
11 /27107
623
1.03
0.01
11/28/07
651
1.07
0.00
11 /29/07
1.05
0.00
11/30/07
630
1.04
0.00
12/01 /07
615
1.03
0.00
12/02/07
601
1.01
0.00
12/03/07
603
1.01
0.01
12/04/07
558
1,00
0.00
* no discharge data available for this day
DEQ-CFW 00001223

Table 3. Cape Fear River Physical Data (surface, mid, bottom) and Coliform (surface only, 5 samples in 30 days)
Station
Date
Depth
Time
Temp
DO
pH
Cond
Fecal Coliform
Geometric Mean
mm/ddmyy
s/m/b
hrs
(°C)
(mg/L)
(su)
umhos/cm
#/100 ml
Fecal #/100 for Site
Cape Fear River
11/06/07
surface
1105
14.5
8.16
6.9
112
38
Site: CPF1
11/06/07
mid
1105
14.5
8.01
6.8
112
11/06/07
bottom
1105
14.5
8.06
6.9
112
11/14/07
surface
1115
11.9
8.70
6.6
149
70 (64)
11/14/07
mid
1115
11.9
8.65
6.7
150
11/14/07
bottom
1115
11.9
8.69
6.5
149
11/19/07
surface
1050
11.6
8.61
7.4
168
150
11/19/07
mid
1050
11.6
8.78
7.3
168
11/19/07
bottom
1050
11.6
8.67
7.2
169
11/28/07
surface
1120
11.8
8.66
7.0
172
41
11/28/07
mid
1120
11.8
8.59
7.0
172
11/28/07
bottom
1120
11.8
8.85
6.9
172
12/04/07
surface
1200
10.4
9.24
7.4
179
11
12/04/07
mid
1200
10.4
9.26
7.3
179
12/04/07
bottom
1200
10.4
9.23
7.2
179
44.77
Cape Fear River
11/06/07
surface
1045
14.8
8.01
6.9
114
36
Site: CPF2
11/06/07
mid
1045
14.6
7.80
6.8
114
11/06/07
bottom
1045
14.6
7.95
6.8
114
11/14/07
surface
1055
12.3
8.41
6.7
148
9
11/14/07
mid
1055
12.0
8.42
6.8
150
11/14/07
bottom
1055
12.0
8.41
6.6
150
11/19/07
surface
1030
11.7
8.60
7.5
169
150
11/19/07
mid
1030
11.7
8.62
7.4
170
11/19/07
bottom
1030
11.7
8.60
7.4
170
11/28/07
surface
1100
11.9
8.66
7.2
165
5
11/28/07
mid
1100
11.8
8.70
7.1
165
11/28/07
bottom
1100
11.8
8.58
7.0
165
12/04/07
surface
1120
10.6
8.86
7.5
169
15
12/04/07
mid
1120
10.6
8.82
7.4
169
12/04/07
bottom
1120
10.6
8.84
7.3
169
20.52
Cape Fear River
11/06/07
surface
1020
14.8
7.77
6.8
108
39
Site: CPF3
11/06/07
mid
1020
14.7
7.70
6.8
109
11/06/07
bottom
1020
14.7
7.77
6.8
109
11/14/07
surface
1025
12.1
8.41
6.7
146
20
11/14/07
mid
1025
12.0
8.40
6.8
148
11/14/07
bottom
1025
12.0
8.45
6.6
146
11/19/07
surface
1015
11.9
8.40
7.7
167
150
11/19/07
mid
1015
11.8
8.47
7.6
168
11/19/07
bottom
1015
11.8
8.37
7.5
168
11/28/07
surface
1045
11.7
8.69
7.2
166
39
11/28/07
mid
1045
11.8
8.66
7.1
166
11/28/07
bottom
1045
11.7
8.57
7.0
167
12/04/07
surface
1115
10.8
8.74
7.5
172
17
12/04/07
mid
1115
10.8
8.83
7.3
172
12/04/07
bottom
1115
10.8
8.51
7.3
172
37.83
DEQ-CFW 00001224

Table 3 (continued)
Cape Fear River Physical Data (surface, mid, bottom) and Coliform (surface only, 5 samples in 30 days)
Date
Depth
Time
Temp
DO
pH
Cond
Fecal Coliform
Geometric Mean
Station
mm/ddmyy
s/m/b
hrs
(*Q
(m /L)
(su)
umhos/cm
#/100 ml
Fecal #/100 for Site
Cape Fear River
11/06/07
surface
1000
15.1
7.43
6.9
108
43 (B1)
Site: CPF4
11/06/07
mid
1000
15.0
7.45
6.8
108
11/06/07
bottom
1000
15.0
7.58
6.8
108
11/14/07
surface
1005
12.5
8.51
6.9
135
20
11/14/07
mid
1005
11.9
8.14
6.8
138
11/14/07
bottom
1005
11.9
8.17
6.6
137
11/19/07
surface
0955
12.0
8.79
8.1
160
61
11/19/07
mid
0955
11.8
8.40
7.9
159
11/19/07
bottom
0955
11.8
8.40
7.7
159
11/28/07
surface
1020
12.1
8.06
7.3
167
10
11/28/07
mid
1020
12.0
8.04
7.2
167
11/28/07
bottom
1020
12.1
7.90
7.1
167
12/04/07
surface
1000
11.0
8.49
7.8
171
12
12/04/07
mid
1000
11.0
8.50
7.9
171
22.89
12/04/07
bottom
1000
11.0
8.61
7.8
171
Cape Fear River
11/07/07
surface
1050
14.3
8.60
6.3
118
11
Site: CPF5
11/07/07
mid
1050
14.3
8.64
6.3
117
11/07/07
bottom
1050
14.3
8.69
6.0
118
11/20/07
surface
1055
12.1
9.43
7.1
174
7
11/20/07
mid
1055
12.1
9.42
7.0
175
11/20/07
bottom
1055
12.1
9.40
6.9
175
11/26/07
surface
1010
11.9
9.72
7.6
178
5
11/26/07
mid
1010
11.8
9.68
7.6
180
11/26/07
bottom
1010
11.8
9.82
7.6
180
11/29/07
surface
1015
11.9
9.65
7.8
172
9
11 /29107
mid
1015
11.9
9.65
7.6
172
11/29/07
bottom
1015
11.9
9.70
7.6
172
11/30/07
surface
0915
11.6
9.81
7.1
173
2
11/30/07
mid
0915
11.6
9.82
7.1
173
11/30/07
bottom
0915
11.6
9.89
6.9
173
12/03/07
surface
1000
11.4
9.57
7.7
176
'
12/03/07
mid
1000
11.3
9.56
7.6
176
12/03/07
bottom
1000
11.3
9.55
4.4
175
5.86
Cape Fear River
11/07/07
surface
1035
14.4
8.80
6.3
122
18
Site: CPF6
11/07/07
mid
1035
14.4
8.73
6.4
122
11/07/07
bottom
1035
14.4
8.70
6.1
122
11/20/07
surface
1030
12.4
9.51
7.1
172
4
11/20/07
mid
1030
12.4
9.39
6.9
172
11/20/07
bottom
1030
12.4
9.50
6.9
172
11/26/07
surface
1030
11.9
9.64
7.5
180
9
11/26/07
mid
1030
11.9
9.65
7.4
180
11/26/07
bottom
1030
11.9
9.65
7.3
180
11/29/07
surface
1035
12.1
9.52
7.6
173
8
11/29/07
mid
1035
12.0
9.51
7.3
173
11/29/07
bottom
1035
12.0
9.61
7.3
173
11/30/07
surface
0936
11.7
9.80
7.3
173
7
11/30/07
mid
0936
11.7
9.83
7.2
173
11/30/07
bottom
0936
11.7
9.84
7.1
173
12/03/07
surface
1030
11.4
9.57
7.6
174
12/03/07
mid
1030
11.3
9.56
7.4
175
12/03/07
bottom
1030
11.3
9.56
7.3
175
8.16
DEQ-CFW 00001225

Table 3 (continued)
Cape Fear River Physical Data (surface, mid, bottom) and Coliform (surface only, 5 samples in 30 days)
Station Date
Depth
Time
Temp
DO
pH
Cond
Fecal Coliform Geometric Mean
mm/ddmyy
s/m/b
hrs
(*C)
(mg/L)
(su)
umhos/cm
#/100 ml Fecal #/100 for Site
11/07/07
surface
1015
14.6
8.81
6.3
122
33
11/07/07
mid
1015
14.6
8.63
6.3
122
11/07/07
bottom
1015
14.6
8.60
6.1
122
11/20/07
surface
1005
12.2
9.38
7.3
168
8
11/20/07
mid
1005
12.2
9.40
7.1
169
11/20/07
bottom
1005
12.2
9.51
6.9
168
11/26/07
surface
1055
12.0
9.36
7.4
180
10
11/26/07
mid
1055
11.9
9.46
7.2
180
11/26/07
bottom
1055
11.9
9.43
7.2
180
11/29/07
surface
1055
12.2
9.51
7.5
173
1
11/29/07
mid
1055
12.3
9.52
7.3
173
11/29/07
bottom
1055
12.3
9.50
7.3
173
11/30/07
surface
0950
11.7
9.65
7.3
173
20
11/30/07
mid
0950
11.7
9.66
7.2
173
11/30/07
bottom
0950
11.7
9.70
7.1
173
12/03/07
surface
1105
11.6
9.51
7.4
175
12/03/07
mid
1105
11.4
9.54
7.3
176
12/03/07
bottom
1105
11.4
9.54
7.2
176
8.8
Qualifier Codes:
61 - Countable membranes with <20 colonies; Estimated
B4 - Filters have counts of both <60 or 80 and <20; Estimated
* - No sample needed
DEQ-CFW 00001226

Ambient Monitoring System Station Summaries
Table 4
NCDENR, Division of Water
Quality
Basinwide Assessment Report
Location: CAPE FEAR RIV
AT SR 1316
AT TAR HEEL
Station #: B8305000
Subbasin:
CPF16
Latitude: 34.74477
Longitude:
-78.78563
Stream
class:
C
Agency: NCAMBNT
NC stream index:
18-(26)
Time period: 01/15/2002
to 12/06/2006
#
#
Results not meeting
EL
Percentiles
result
ND
EL
# % %Conf
Min
loth
25th
50th
75th
90th
Max
Field
D.O. (mg/L)
49
0
<4
1 2
3
5.1
5.9
7.7
10
10.9
14.9
49
0
<5
4 8.2
3
5.1
5.9
7.7
10
10.9
14.9
pH (SU)
48
0 -
<6
2 4.2
5.4
6.2
6.3
6.7
6.9
7.1
7.3
48
0
>9
0 0
5.4
6.2
6.3
6.7
6.9
7.1
7.3
Spec. conductance
49
0
N/A
53
79
98
118
150
181
289
(umhos/cm at 25°C)
Water Temperature(°C)
49
0
>32
0 0
5.9
7.9
11.2
18.1
24.7
27.7
29.6
Other
TSS (mg/L)
16
0
N/A
7
7.7
9
14
20.8
27.6
29
Turbidity (NTU)
48
0
>50
3 6.2
1.9
8.1
9.9
16
22.8
36.9
90
Metals (ug/L)
Aluminum, total (Al)
17
0
N/A
230
318
360
570
660
2080
2400
Arsenic, total (As)
17
17
>10
0 0
5
5
5
5
10
10
10
Cadmium,.total (Cd)
17
17
>2 "
0 0
2
2
2
2
2
2
2
Chromium, total (Cr)
17
17
>50
0 0
25
25
25
25
25
25
25
Copper, total (Cu)
17
2
>7
2 11.8 76.2
2
2
2
3
4
8
9
Iron, total (Fe)
17
0
>1000
5 29.4 99.5
370
482
670
840
1100
2400
2400
Lead, total (Pb)
17
17
>25
0 0
10
10
10
10
10
10
10
Mercury, total (Hg)
17
17
>0.012
0 0
0.2
0.2
0.2
0.2
0.2
0.2
0.2
Nickel, total (Ni)
17
17
>88
0 0
10
10
10
10
10
10
10
Zinc, total (Zn)
17
11
>50
0 0
10
10
10
10
13
17
20
Fecal coliform (#/100mL)
# results: Geomean
# > 400: % > 400: %Conf.
45 82
8
18
Key:
# result: number of observations
# ND: number of observations reported to be below detection level (non -detect)
EL: Evaluation Level; applicable numeric or narrative water quality standard or action level
Results not meeting EL: number and percentages of observations not meeting evaluation level
%Conf : States the percent statistical confidence that the actual percentage of exceedances is at least 10% (20% for Fecal Coliform)
Stations with less than 10 results for a given parameter were not evaluated for statistical confidence
DEQ-CFW 00001227

Ambient Monitoring System Station Summaries
NCDENR, Division of Water Quality
Table 4(continued) Basinwide Assessment Report
Location: CAPE FEAR RIV AT SR 1316 AT TAR HEEL
Station #: B8305000 Subbasin: CPF16
Latitude: 34.74477 Longitude:-78.78563 Stream class: C
Agency: MCFRBA NC stream index: 18-(26)
Time period: 01/31/2002 to 12/12/2006
# # Results not meeting EL Percentiles
result ND EL # % %Conf Min loth 25th 50th 75th 90th Max
Field
D.O. (mg/L)
84
0
<4
1
1.2
2.9
5.8
6.4
7.5
8.8
10.8
13.1
84
0
<5
4
4.8
2.9
5.8
6.4
7.5
8.8
10.8
13.1
pH (SU)
84
0
<6
2
2.4
5.6
6.3
6.5
6.8
7
7.2
7.9
84
0
>9
0
0
5.6
6.3
6.5
6.8
7
7.2
7.9
Spec. conductance
84
1
N/A
57
90
106
124
158
194
371
(umhos/cm at 25°C)
Water Temperature (°C)
84
0
>32
0
0
3
7.6
15.3
23.3
27
29.1
30.6
Other
Chlorophyll a (ug/L)
35
6
>40
0
0
1
1
2
3
4
8
17
TSS (mg/L)
59
0
N/A
4
5.3
7.3
12
16
28.3
98
Turbidity (NTU)
59
0
>50
2
3.4
4
6
7.5
10
16
30
130
Nutrients (mg/L)
NH3 as N
59
4
N/A
0.02
0.03
0.05
0.06
0.09
0.17
0.33
NO2 + NO3 as N
57
0
N/A
0.36
0.51
0.71
0.93
1.12
1.4
3.44
TKN as N
59
3
N/A
0.1
0.4
0.5
0.6
0.9
0.9
3.1
Total Phosphorus
59
1
N/A
0.01
0.11
0.13
0.16
0.26
. 0.34
0.93
Fecal coliform (#/100mL)
# results: Geomean
# > 400:
% > 400: %Conf:
58 47
5
9
Key:
# result: number of observations
# ND: number of observations reported to be below detection level (non -detect)
EL: Evaluation Level; applicable numeric or narrative water quality standard or action level
Results not meeting EL: number and percentages of observations not meeting evaluation level
%Conf : States the percent statistical confidence that the actual percentage of exceedances is at least 10% (20% for Fecal Coliform)
Stations with less than 10 results for a given parameter were not evaluated for statistical confidence
DEQ-CFW 00001228

Table 5
Cape Fear River Water Samples - Nutrients,
Metals, MBAS, Sulfate,
Hardness, Fluoride
and Chloride
Station
Date
Time
NH3 TKN
NOX
Nitrate
P Total
Ni
Ca
Mg
MBAS
Sulfate
Hardness
Fluoride
Chloride
mm/dd/yy
hrs.
mg/L mg/L
mg/L
mg/L
mg/L
ug/L
mg/L
mg/L
mg/L
mg/L
mg/L
mg/L
mg/L
Cape Fear River
12/04/07
1135
0.04 0.50 (J2)
1.5
1.5
0.23
10 (U)
6.3
2.8
0.1 (U)
19
27.61
0.4 (U)
20
Site: CPF1
Cape Fear River
12/04/07
1100
0.03 0.42 (J2)
1.2
1.2
0.19
10 (U)
6.5
2.8
0.1
18
27.77
0.4 (U)
19
Site: CPF2
Cape Fear River
12/04/07
1035
0.03 0.47 (J2)
1.3
1.3
0.20
10 (U)
6.3
2.7
0.1
18
26.85
0.4 (U)
20
Site: CPF3
Cape Fear River
12/04/07
1000
0.04 0.53
1.2
1.2
0.20
10 (U)
6.3
2.8
0.1
18
26.61
0.4 (U)
20
Site: CPF4
Cape Fear River
12/03/07
1000
0.06 0.49
1.3
1.3
0.19
10 (U)
6.2
2.8
0.1 (U)
20
27.01
0.4
19
Site: CPF5
Cape Fear River
12/03/07
1030
0.05 '0.36
1.3
1.3
0.17
10 (U)
6.1
2.7
0.1 (U)
20
26.35
0.4
19
Site: CPF6
Cape Fear River
12/03/07
1105
0.05 0.42
1.3
1.3
0.17
10 (U)
6.2
2.8
0.1 (U)
20
27.01
0.4
19
Site: CPF7
WS-IV & C Standards
-
10 mg/L
25 ug/L
-
0.5 mg/ L
250 mg/L
100 mg/L
1.8 mg/L
250 m/L
Qualifier Codes:
(U) - Samples analyzed for this compound but
not detected
(J2) - Reported value
failed to meet QC criteria for either precision or accuracy; Estimated
■
91
6
n
I
0
0
0
o
N
N
Cfl ^

Table 6
Cape Fear River Water Samples
Pesticides, Herbicides and Semivolatile Organics, Volatile Organics (VOAs)
Pesticides and Organics
Cape Fear River - CPF1
Cape Fear River - CPF2
Cape Fear River - CPF3
12/04/07 1135
12/04/07 1100
12/04/07 1100
mm/dd/
mm/dd/
mm/dd/yy
Chlorinated Pesticides
all 51 target compounds (U) not deteced
all 51 target compounds (U) not deteced
all 51 target compounds (U) not deteced
3 unidentified peaks detected
3 unidentified peaks detected
3 unidentified peaks detected
Acid Herbicides
all 15 target compounds (U) not deteced
all 15 target compounds (U) not deteced
all 15 target compounds (U) not deteced
<10 unidentified peaks detected
<10 unidentified peaks detected
<10 unidentified peaks detected
Semivolatile Organics (BNAs)
all 66 target compounds (U) not deteced
all 66 target compounds (U) not deteced
all 66 target compounds (U) not deteced
0 unidentified peaks detected
0 unidentified peaks detected
0 unidentified peaks detected
Volatile Organics (VOAs)
58 target compounds (U) not detected
58 target compounds (U) not detected
58 target compounds (U) not detected
identified peaks:
identified peaks:
identified peaks:
Chloroform 0.79 ug/L
Chloroform 0.57 ug/L
Chloroform 0.57 ug/L
Bromodichloromethane 0.46 ug/L
Bromodichloromethane 0.33 ug/L
Bromodichloromethane 0.34 ug/L
sample not analyzed for this compound:
sample not analyzed for this compound:
sample not analyzed for this compound:
Chloroethyl vinyl ether
Chloroethyl vinyl ether
Chloroethyl vinyl ether
Table 6 (continued)
Cape Fear River Water Samples
Pesticides, Herbicides and Semivolatile Organics, Volatile Organics (VOAs)
Pesticides and Organics
Cape Fear River - CPF4
Cape Fear River - CPF5
Cape Fear River - CPF6
12/04/07 1000
12/03/07 1100
12/03/07 1030
mm/ddtyy
mmldd/
mm/ddtyy
Chlorinated Pesticides
all 51 target compounds (U) not deteced
all 51 target compounds (U) not deteced
all 51 target compounds (U) not deteced
9 unidentified peaks detected
3 unidentified peaks detected
1 unidentified peaks detected
Acid Herbicides
all 15 target compounds (U) not deteced
all 15 target compounds (U) not deteced
all 15 target compounds (U) not deteced
<10 unidentified peaks detected
5 unidentified peaks detected
<10 unidentified peaks detected
Semivolatile Organics (BNAs)
all 66 target compounds (U) not deteced
all 66 target compounds (U) not deteced
all 66 target compounds (U) not deteced
0 unidentified peaks detected
0 unidentified peaks detected
0 unidentified peaks detected
Volatile Organics (VOAs)
59 target compounds (U) not detected
57 target compounds (U) not detected
55 target compounds (U) not detected
identified peaks:
identified peaks:
identified peaks:
Chloroform 0.59 ug/L
Chloroform 0.85 ug/L
Chloroform 0.91 ug/L
Bromodichloromethane 0.60 ug/L
Bromodichloromethane 0.58 uglL
sample not analyzed for this compound:
1,2,4-Trimethylbenzene 0.36 ug/L
Toluene (N3) 0.12 ug/L
Chloroethyl vinyl ether
m,p-Xylene (N3) 0.41 ug/L
sample not analyzed for this compound:
1,2,4-Trimethylbenzene 0.37 ug/L
Chloroethyl vinyl ether
sample not analyzed for this compound:
Chloroethyl vinyl ether
Qualifier Codes:
(U) - Samples analyzed for this compound but not detected
(N1) - The component has been tentatively identified based on mass spectral library search and has an estimated value
(N3) - Estimated concentration is <PQL and >MDL
Table 6 (continued on the following page)

Table 6 (continued)
Cape Fear River Water Samples
Pesticides, Herbicides and Semivolatile Organics, Volatile Organics (VOAs)
Pesticides and Organics
Cape Fear River- CPF7
12/03/07 1115
mmIdd/yy
Chlorinated Pesticides
all 51 target compounds (U) not deteced
<3 unidentified peaks detected
Acid Herbicides
all 15 target compounds (U) not deteced
<10 unidentified peaks detected
Semivolatile Organics (BNAs)
all 66 target compounds (U) not deteced
0 unidentified peaks detected
Volatile Organics (VOAs)
55 target compounds (U) not detected
identified peaks:
Chloroform 1.0 ug/L
Bromodichloromethane 0.61 uglL
Toluene (M) 0.14 ug/L
m,p-Xylene (M) 0.42 ug/L
1,2,4-Tdmethylbenzene 0.39 ug/L
sample not analyzed for this compound:
Chloroethyl vinyl ether
Qualifier Codes:
(U) - Samples analyzed for this compound but not detected
(M) -The component has been tentatively identified based on mass spectral library search and has an estimated value
(M) - Estimated concentration is <PQL and >MDL