NC0005762_Fecal Coliform POA_20031029

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WESTPOINT STEVENS
October 29, 2003
Ms. Belinda S. Henson
North Carolina Department of Environment & Natural Resources
Fayetteville Region — Department of Environmental Quality
225 Green Street — Suite 714
Fayetteville, NC 28301
Re: Fecal Coliform Plan of Action
WestPoint Stevens Wastewater Treatment Plant
Wagram, Scotland County
NPDES Permit NC0005762
Dear Ms. Henson:
LOUT S 2003
`%'
Please find attached two copies of Plan of Action — Fecal Coliform Compliance
Improvement, which outlines actions taken to date and future work that is designed to
address periodic fecal coliform compliance issues at our Wagram Complex. This
document is submitted according to your request dated August 27, 2003. If you have any
questions or need additional information, please give me a call at 706-645-4515.
Sincerely,
Eddie Lanier, ' .
Director — Environmental Department
attachment
POST OFFICE BOX 71, 507 W. 10TH STREET, WEST POINT, GEORGIA 31833 • AREA 706 645-4000

Plan of Action
Fecal Coliform Compliance Improvement
WestPoint Stevens - Wagram Complex
Wagram, Scotland County, North Carolina
NPDES Permit No. NC0005762
Prepared by:
WestPoint Stevens Environmental Department
3300 23rd Drive
Valley, Alabama 36854
October 30, 2003

_
[[gT )3 !I 2003
Plan of Action
Fecal Coliform Compliance Improvement
WestPoint Stevens - Wagram Complex
Wagram, Scotland County, North Carolina
NPDES Permit No. NC0005762
Prepared by:
WestPoint Stevens Environmental Department
3300 231d Drive
Valley, Alabama 36854
October 30, 2003
Prepared by:
Eddie Lanier, P.E.
Director — Environmental Department
WestPoint Stevens Inc.
t
Date

Table of Contents
Page No.
I. Introduction 1
II. Background 2
III. Conclusions 6
IV. Recommendations 7
Tables
1. History of Fecal Coliform Exceedances 8
Appendices
A. Fecal Coliform Study performed by Arcadis
December 30, 1999

L Introduction
The WestPoint Stevens (WPS) Wagram Complex is located in Wagram, North Carolina.
The Complex includes a terry yarn and weaving plant (Scotland Plant), and a dyeing and
finishing plant (Bob Stevens Plant) that produces finished towels from woven fabric
received from several plants in the Southeast. It also houses a carpet dyeing and finishing
operation that is owned by Gulistan Carpets. These operations had formerly been a part of
J. P. Stevens. The process water used at all three plants is withdrawn from the Lumber
River and treated in a water filter plant owned by WPS.
All of the wastewater produced by these facilities is discharged to a wastewater treatment
plant (WWTP) that is owned by WPS and operated by Bob Stevens Plant personnel. This
plant is permitted to discharge up to 7.0 million gallons per day of treated wastewater to the
Lumber River under NPDES Permit No. NC0005762. One of the parameters monitored by
this permit is fecal coliform bacteria (coliform). Over the past few years, the WWTP has
periodically exceeded the permitted limit for coliform of 400 colonies/100 ml (daily
maximum) and/or 200 colonies/100 ml (monthly geometric mean). Despite several actions
to address the situation, the WWTP continues to experience occasional permit exceedances
for coliform. The North Carolina Department of Environment and Natural Resources
(NCDENR) has requested a Plan of Action (Plan) that addresses the causes of the
noncompliance and outlines the actions that will be taken to prevent the recurrence of
future violations. The Plan is also required to have a timeframe for the implementation of
the proposed actions. The following is intended to fulfill these requirements.

r-
II. Background
The Bob Stevens Plant began operation in 1965 as a Springs Mills (now Springs Industries)
plant. The WWTP was constructed in the late 60's or early 70's after the passage of the
Clean Water Act. The facility was purchased by J. P. Stevens in 1974 and later by
WestPoint Pepperell (WPP) in 1988. WestPoint Pepperell's name was changed to
WestPoint Stevens in 1993. As stated above, the WWTP receives wastewater from three
different manufacturing operations.
1. Bob Stevens Plant, which is the largest contributor, discharges wastewater from
towel bleaching, dyeing, and finishing operations.
2. Gulistan Carpets owns a carpet dyeing operation located inside the Bob Stevens
facility and also discharges to the WWTP.
3. WPS Scotland Plant is a yarn -making, yarn -dying and weaving facility that
discharges only a small percentage of the total flow. It has two wet manufacturing
process, slashing (which is a low -water -use operation) and yarn dyeing.
A central boiler room supplies steam to all three plants and discharges boiler blowdown to
the WWTP. All three facilities discharge sanitary wastewater to the WWTP. This sanitary
flow is collected in a separate sewer system within each plant and does not join the process
sewer system until it gets outside the building. In addition, there are several detached
buildings (filter plant, boiler room, wastewater lab, guard houses, etc.) that have rest rooms
and which also discharge into the main outfall to the WWTP. The percentage of sanitary
flow in the total flow to the WWTP is very small (<1 %).
The WWTP was upgraded in 1991 with the addition of an equalization basin, mixer-
flocculator, sludge thickener, and sludge digester. It was upgraded again in 1993 to handle
an increased rate of production in manufacturing. This upgrade included an enlargement of
both the equalization basin and the aeration basin, the replacement of the aeration
equipment and the addition of mixers in the aeration basin, and the installation of a third
clarifier. At the time the 1993 addition was made, coliform compliance was discussed, and
the consultant believed that the combination of the high pH of the incoming wastewater
with the longer retention time in the equalization basin would effectively kill any coliform
bacteria contained in the water.
The compliance history of the WWTP for coliform prior to the purchase by WPP-(now
WPS) is not known. In 1991, the year that the WWTP was first upgraded by WPS, the
WWTP effluent exceeded the fecal coliform limit a total of ten times, five daily maximum
exceedances and five monthly average exceedances. In 1992, after the upgrade, there was
only one monthly average violation for the entire year (325 versus a limit of 200
colonies/100 m1). In 1993 there were five exceedances (four daily maximums and one
monthly average). After the completion of the 1993 upgrade, the WWTP had no
exceedances of the fecal coliform limit during the entire year of 1994.
2

For the next few years the plants experienced occasional elevated fecal coliform levels,
usually on one day during a month. These were typically separated by extended periods of
compliance, and could usually be attributed to a particular situation. As each apparent
cause was addressed, compliance would follow for a while and then another exceedance
would occur. Most of the elevated results during the period of 1995-2000 occurred during
the spring (March -June). See Table No. 1 fora summary of all coliform testing results from
1991 to the present.
In 1998, WPS was approached by Scotland County, who was installing a collection system
to expand their wastewater collection capability in that area. The contact was made to
determine whether the WPS might be interested in routing their sanitary sewage to the
County system. An investigation was made to identify any possible grant money that might
be available to assist in this connection. When it was discovered that grant money was not
available, WPS received estimates of the costs to pipe the sanitary sewage to the new
County sewer line. Because of the size of the facility and the location where the connection
to the complex's sanitary sewer system would need to be made, it was judged that this
alternative was not economically feasible.
i— In 1999, WPS retained ARCADIS Geraghty & Miller (ARCADIS) to perform a coliform
study to identify the sources of coliform and to make recommendations on the best way to
address the occasional permit exceedances. A copy of this report is attached in Appendix
A. It identified several potential sources of coliforms for the WWTP:
1. Sanitary waste from the manufacturing facility,
2. Filter backwash from the water filter plant (coliform levels in the raw river water
were as high as 2500), and
3. Water removed from the sludge in the thickener and returned to the aeration basin.
ARCADIS further identified several actions that could be taken, and recommended that a
preliminary design and cost study be undertaken for the following, so that the most feasible
actions could be taken:
1. Isolating the sanitary wastewater from the plant discharge and directing it to the
County sewer system,
2. Disinfecting the raw river water at the intake,
3. Installing a grinder pump on the sanitary discharge to improve the disinfection of
the solids by the high -pH wastewater in the equalization basin,
4. Operating the equalization basin at a high level to increase the contact time with the
high -pH process wastewater,
5. Installing a filter plant backwash water clarifier to thicken the solids from the filter
plant (allowing the solids to be directed to the WWTP sludge digester rather than to
the equalization basin),
6. Evaluating the possibility of subdividing the equalization basin to prevent the
potential short-circuiting of coliform from the influent pipe to the exit end of the
basin, and

7. Modifying the mixing equipment in the equalization basin to reduce solids buildup
and to increase solids contact with the high -ph process wastewater.
Since Option No. 1 had previously been evaluated and gauged not economically feasible (it
was also noted to that Option No. 1 alone could not guarantee compliance given the
coliform levels in the river water and filter plant sludge), and Option No. 4 would have
compromised the purpose of the equalization basin, WPS elected to pursue Option No. 5:
removing the filter plant solids from the equalization basin. It was hoped that by removing
this source of solids, then the need for No. 7 (improving equalization basin mixing) would
be unnecessary. The action was accomplished by routing the filter backwash to a holding
tank and then to an existing sludge thickener (which had been idle following the
installation of a gravity belt thickener) to remove excess water before sending the solids on
to the WWTP digester. The water removed was sent to the equalization basin for contact
with the elevated pH. In order to remove another potential source of excess coliforms, the
permeate from the sludge gravity belt thickener was also rerouted from the aeration basin
to the equalization basin to provide additional contact with the higher pH to kill any
residual coliform.
An additional expected benefit to removing the filter plant solids from the equalization
basin was the control of organic acid production in the anaerobic sludge deposits that they
had been producing. These acids tend to moderate the pH (which hinders coliform
treatment) and also stimulate the growth of certain strains of filamentous bacteria that
inhibit settling in the clarifiers. Loss of solids also raises the potential of elevated coliform
levels in the effluent, based on the coliform population found in the digester solids.
Option No. 2 is partially addressed by adding bleach at the water filter plant and
maintaining a chlorine residual in the process water. Some estimates of the costs associated
with Option No. 3 were prepared but were not pursued at that time because of concern that
this approach would not address the problem of coliform in the filter plant sludge. It was
felt that by removing the filter plant sludge from the equalization basin, one source of
coliform would be removed and the remaining coliform would receive improved treatment
for the reasons outlined above. Design work for Option No. 5 was done and the filter plant
sludge dewatering system was placed in operation in late 2002. In conjunction with this
work, a new bar screen was also installed on the influent line with the hope that this would
assist in breaking up fecal material before it reached the equalization basin. However, the
WWTP has continued to have occasional elevated coliform levels in the effluent, and the
occurrence has gradually become more frequent during the past three years. Even -so, most
elevated results have been typically followed by several readings that are compliant.
The wastewater consultant for the plant believes that the occasional high coliform results
are caused by small particles of fecal matter that are able to make it through the treatment
system intact. The sanitary sewage flows by gravity to the WWTP and is lifted up to the
equalization basin by a screw pump, which does little to break up fecal particles. The
surviving particles provide the coliform bacteria a refuge from the high -pH water in the
equalization basin and the disinfection that would normally be provided. It is likely that the
presence of one of these particles in the effluent composite sample produces the occasional

high coliform results. It also appears that the opportunity for this situation is increased
when the WWTP experiences settling problems.
For the past two or three years, the WWTP has battled a persistent filamentous bacteria
problem that has resulted in periodic episodes of poor settling. This correlates with the
increased number of fecal exceedances. WPS has tried many different ways to address the
situation, including chlorination of the return sludge, the addition of polymer at the
clarifiers, and dredging the equalization basin (twice). Each time there is some initial
improvement but the filamentous bacteria eventually return. Since the request for this Plan
was received from the NCDENR, WPS has discussed the situation with their wastewater
treatment consultant who has recommended that the Food to Microorganisms Ratio (F:M)
in the system be reduced. He believes that the type filament that is persistent at the WWTP
is one that thrives in a high F:M system and that the adjustment will reduce the population
of that filament while also improving the performance of the WWTP. The mixed liquor
suspended solids level had gradually been reduced over the past couple of years to allow
the WWTP to handle the settling problem. Following his recommendation, WPS has taken
steps to reduce the F:M and has seen an apparent reduction in the filamentous population.
At this point the full effect of the change cannot yet be determined because one of the three
clarifiers drives failed last week and the WWTP has been running on only two clarifiers.
Once the third clarifier is back in normal operation, it is hoped that settling will improve
and any surviving fecal particles will be retained in the sludge.
I

III. Conclusions
As mentioned above, it is believed that the occasional lapses in coliform treatment
efficiency are the result of small particles of fecal matter that make their way through the
WWTP intact, and which are occasionally collected in the composite sample. This
phenomenon appears to be more likely to occur during periods of poor settling. The actions
already taken by WPS related to the adjustment of the F:M Ratio are expected to reduce the
frequency of coliform exceedances. Additional action may be required to guarantee that
future coliform exceedances do not occur.
1

IV. Recommendations
In order to further reduce the chance of coliform exceedances, WPS is proposing to assess
four potential courses of additional action. These include the following:
1. Install a chlorination/dechlorination system on the effluent from the WWTP.
2. Install a solids grinder on the sanitary wastewater stream before it reaches the
point where it is co -mingled with the process wastewater. This would require
similar equipment at any location where a remote restroom facility connects to
the combined flow, or the rerouting of each of these sites to a septic tank.
Alternatively, a larger unit could be installed on the combined flow after it
passes through the bar screen.
3. Reroute the sanitary flow to the Laurinburg-Maxton sewer system. Although
this alternative has previously been deemed not economically feasible, there
may be other sources of money now available to assist in the project.
4. Install baffles in the equalization basin to maximize contact time and to
minimize the chance of short-circuiting.
Following this assessment, WPS will prepare a summary report that outlines the findings
and identifies the recommended course of action. This report will be submitted to
NCDENR for approval before any work is begun. The report will include the estimated
cost and the expected time required to implement each alternative. WPS proposes to
provide that report within 90 days of the approval by NCDENR of this Plan.
Fi
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I-i
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Table No. 1
History of Fecal Coliform Exceedances
Date
Monthly Maximum
(Colonies/100m1)
Limit is 400
Monthly Average
Geometric Mean
(Colonies/100m1)
Limit is 200
Jan-93
234
142
Feb-93
397
20
Mar-93
230
127
Apr-93
688
185
May-93
TMTC
52
Jun-93
310
15
Jul-93
114
77
Aug-93
643
409
Sep-93
754
123
Oct-93
104
18
Nov-93
113
62
Dec-93
84
42
Jan-94
123
121
Feb-94
31
25
Mar-94
200
89
Apr-94
250
67
May-94
44
22
Jun-94
26
25
Jul-94
250
157
Aug-94
128
92
Sep-94
3
1
Oct-94
68
12
Nov-94
7
4
Dec-94
32
18
Jan-95
40
15
Feb-95
3
2
Mar-95
.. 900
157
Apr-95
5000
98
May-95
108
70
Jun-95
11
9
Jul-95
60
24
Aug-95
23
5
Sep-95
73
31
Oct-95
6-
5
Nov-95
16
6
Dec-95
7
6
Jan-96
5
3
Feb-96
8
3
Mar-96
2
1
Apr-96
3
1

Date
Monthly Maximum
(Colonies/100m1)
Limit is 400
Monthly Average
Geometric Mean
(Colonies/100m1)
Limit is 200
May-96
16
4
Jun-96
5400
1125
Jul-96
98
63
Aug-96
60
49
Sep-96
104
27
Oct-96
8
3
Nov-96
2
1
Dec-96
33
13
Jan-97
5
2
Feb-97
20
5
Mar-97
54
40
Apr-97
2200
78
May-97
2500
46
Jun-97
580
144
Jul-97
50
12
Aug-97
2
2
Sep-97
13
5
Oct-97
3
2
Nov-97
8
5
Dec-97
2
2
Jan-98
98
57
Feb-98
210
61
Mar-98
230
48
Apr-98
2000
127
May-98
3
3
Jun-98
56
24
Jul-98
300
24
Aug-98
240
168
Sep-98
310
198
Oct-98
25
5
Nov-98
270
255
Dec-98
98
91
Jan-99
430
185
Feb-99
55
43
Mar-99
50
20
Apr-99
27
16
May-99
56
13
Jun-99
84
44
Jul-99
270
66
Aug-99
41
35
Sep-99
90
89
Oct-99
15
7
Nov-99
31
10
Dec-99
72
12
Jan-00
220
21
Feb-00
21
6
Mar-00
2100
20
9

Date
Monthly Maximum
(Colonies/100m1)
Limit is 400
Monthly Average
Geometric Mean
(Colonies/100m1)
Limit is 200
Apr-00
2
2
May-00
1100
99
Jun-00
13
5
Jul-00
11
5
Aug-00
4
3
Sep-00
25
17
Oct-00
3
2.4
Nov-00
50
16
Dec-00
90
38
Jan-01
560
167
Feb-01
106
11
Mar-01
3800
152
Apr-01
154
68
May-01
88
2
Jun-01
15
7
Jul-01
1100
62
Aug-01
240
31
Sep-01
1000
139
Oct-01
100
20
Nov-01
600
179
Dec-01
100
56
Jan-02
260
56
Feb-02
154
21
Mar-02
28249
631
Apr-02
49100
562
May-02
118
59
Jun-02
290
92
Jul-02
62
48
Aug-02
24
5
Sep-02
240
93
Oct-02
2000
49
Nov-02
410
10
Dec-02
5100
49
Jan-03
310
150
Feb-03
86
26
Mar-03
380
18
Apr-03
2300
260
May-03
5900
267
Jun-03
400
33
Jul-03
240
45
Aug-03
56
14
10

Appendix A

i
i
II
w: .
ARCADIS
GERAGHTY & MILLER
Fecal Coliform Study
December 30, 1999
PRE P A R E D FOR
WestPoint Stevens, Wagram NC

Fecal Coliform Study
December 30, 1999
PREPARED FOR
WestPoint Stevens, Wagram NC

r
Prepared by:
Senior Project Engineer
Water and Waste Management
Feca/ Col/form Study
Prepared for.
WestPoint Stevens
Bath Products Division
PO Box 388
Wagram, NC 28396
Prepared by:
ARCADIS Geraghty & Miller, Inc.
420 Park Avenue
Greenville
South Carolina 29601
Tel [phone]
Fax [phone]
Our Ref.:
G5023210.0000
Date:
December 30, 1999
This document is intended only for the use
of the individual or entity for which it was
Reviewed b►:, prepared and may contain information that
is privileged,confidential, and exempt from
disclosure under applicable law. Any
dissemination, distribution, or copying of
IWW Department Manager 7 thisIdocument is strictly prohibited.
Water and Waste Management

Table of Contents
I. EXECUTIVE SUMMARY 1
II. BACKGROUND 2
III. SUMMARY OF FECAL COLIFORM SAMPLING RESULTS 5
IV. OPERATIONAL ISSUES 7
V. CONCLUSIONS AND RECOMMENDATIONS 8
TABLES
1 FECAL COLIFORM RESULTS 5
FIGURES
1. FACILITY SITE SAMPLING LOCATION PLAN 3
2. WWTP FLOW SCHEMATIC 4
APPENDICES
A. Project Progress Reports and Meeting Minutes
B. Laboratory Analyses for Fecal Coliform
GS023210.0002/Rpt.docrev1
12/30/99

z�•
ri
WestPoint Stevens
Bath Products Division
Fecal Coliform Study
I. EXECUTIVE SUMMARY
The WestPoint Stevens textile manufacturing facilities located in Wagram, NC, have a
wastewater treatment plant (WWTP) that discharges to the Lumber River. The treatment
facility operates without a conventional wastewater disinfection process to control fecal
coliform. The facility meets fecal coliform permit levels the majority of the time, however,
over the years has had occasional excursions. WestPoint Stevens has determined to take an
active role in investigating viable alternatives to conventional disinfection by source
control, operational or physical plant modifications to reduce fecal coliform organisms in
the WWTP discharge. This proactive response is designed to eliminate the occasional fecal
coliform excursion.
ARCADIS Geraghty & Miller (AG&M) has been contracted to assist in this effort by
examining the river water, wastewater and areas within the plant and treatment systems.
As described in this report, AG&M found fecal coliform levels in various locations: the
Lumber River intake water, the water plant backwash, the combined process and sanitary
wastewater and parts of the wastewater treatment plant.
Based upon the evaluation presented in this report, it is our opinion that there is the
potential to isolate or treat these fecal coliform sources for better control and to provide
additional attenuation in the wastewater treatment plant.
ARCADIS Geraghty & Miller recommends that WestPoint Stevens proceed with a
preliminary design and cost study to evaluate the implementation of the following actions:
• Isolate the sanitary sewer collection from the process wastewater system and treat the
sanitary wastewater separately with disinfection or pump it to a local municipality.
• Disinfect the river water at the river intake structure.
• Pretreat the sanitary sewer wastewater by using grinder pumps to improve
contact/disinfection of the solids with the high pH process wastewater.
• Isolate the water plant filter backwash water and associated solids from the wastewater
equalization basin
• . Reduce the solids accumulation in the wastewater equalization basin by improving the
basin mixing.
• Reduce wastewater equalization basin short-circuiting by installing curtains
WestPoint Stevens should achieve additional fecal coliform reduction as the fecal coliform
sources are treated or eliminated and plant modifications are made. In the event that these
modifications are found to be insufficient to consistently meet the NPDES wastewater
discharge limits, a positive means of disinfection such as the addition of chlorine,
hypochlorite or ozone to the discharge effluent will be required:
GS023210.00021pptdo evl
1213099

WestPoint Stevens
Bath Products Division
Fecal Coliform Study
II. BACKGROUND
WestPoint Stevens operates a textile manufacturing and wastewater treatment facility
located in Wagram, NC. WPS has two facilities on this site, the Scotland and Bob Stevens
plants. Gullistan owns and operates a carpet facility also located on the site. The Scotland
plant produces -bath goods thread and woven fabric from cotton. The Bob Stevens plant
bleaches, dyes, and finishes the fabric into bath goods. The two WPS plants and the carpet
mill produce a combined waste stream of approximately 3.0 MGD. This flow is comprised
of both process and sanitary wastewater. The site layout is shown on Figure 1.
These plants require a significant volume of water for the production of these textile goods.
The WPS facility operates a water treatment facility to supply water from the Lumber
River for the production processes. The water plant uses coagulation, flocculation, filtration
and chlorination to remove particulate, color and bacterial contamination. Treatment plant
solids are accumulated and wasted to the WWTP equalization basin for disposal.
The textile plants use the treated river water in various process and utility operations. The
wastewater is collected in a gravity system along with the sanitary wastewater from all
three manufacturing facilities and piped to the wastewater treatment plant (WWTP). The
WWTP facility is permitted for a flow of 4.5 MGD and operates under NPDES Permit
NC0005762 The discharge permit has a fecal coliform limit of 200 fecal coliform / 100
ml average and 400 / 100 ml maximum. Figure 2 is a schematic of the WWTP.
ARCADIS Geraghty & Miller investigated the sources of fecal coliform and, as sampling
results became available, the initial sampling regime was modified to further identify and
confirm sources. AG&M completed a series of four sampling events. The sampling events
included periodic project updates and discussions between WPS and ARCADIS that are
included in Appendix A.
GS023210.0002/Rpt-0oval
2
12/3099

NOTE:
Numbers represent
sampling locations as
shown in Table 1
WestPoint Stevens, Wagram NC Site and Sampling Location Plan
Taken from Hydroscience Preliminary Engineering Report January 25, 1991 Figure 1
G5023210.000LRpFdot
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a
i

WestPoint Stevens
Bath Products Division
Fecal Coliform Study
III SUMMARY OF THE FECAL COLIFORM SAMPLING RESULTS
Wastewater samples were taken to determine the fecal coliform present at various locations
in and around the facility. Grab samples were collected from locations at the river inlet,
water plant clearwell basin, filter backwash trough, manufacturing plant process area,
WWTP equalization basin, aeration basin, thickener filtrate, digester and the WWTP
effluent. These locations are numbered on Table 1 and shown on Figure 1 and Figure 2.
Samples were delivered to PACE Laboratories in Charlotte, NC for analysis. All samples
were delivered within the required holding time. The results of these analyses are shown
in Table 1 and the lab reports are included in Appendix B.
Table 1 Fecal Coliform Results
#
Sample Location
Fecal Coliform Results (# FC/100mL)
8/18/99
9/2/99
9/30/99
10/26/99
1
River Intake
140
ND
2500,
620
-
2
Water Filter Backwash
180
ND
-
-
3
Raw Waste Influent
400
ND
-
-
4
Digester Solids
140,000
7,000
-
-
5
EQ Basin —Discharge
1,000
ND
-
-
6
Sludge Thickener — Filtrate
300
ND
-
-
7
Final Effluent
ND
ND
-
-
8
Aeration Basin
ND
ND
-
-
9
EQ Basin — Solids
ND
ND
ND x 3
*ND x 6
10
Dye Range
-
-
NDx2
11
Water Plant Filter Basin
-
-
ND x 2
ND x4
* pH readings of the equalization basin solids, 7.3, 8.6, 11.9, 9.9, 11.0, 7.9
Fecal Coliform NPDES Permit Limits are 200 FC/100 ml average; 400 FC/100 ml max.
ND = None Detected
G502321O.OoO ppt-0ocayt
12/3W99
5

WestPoint Stevens
Bath Products Division
Fecal Coliform Study
The results in Table 1 show that some of the samples had fecal coliform results in excess of
the permit limits. The river intake water, filter plant backwash, raw waste influent,
thickener filtrate, digester and equalization basin discharge were the locations identified
with fecal coliform levels exceeding permit levels. These are discussed below.
River Water and Filter Backwash (#1,2): The river water samples had fecal coliform
results well above the effluent limits placed upon the WPS discharge. It is assumed that
these fecal coliform are from warm-blooded animal discharges upstream of the intake.
These fecal coliform in the river water appear to be the source of fecal coliform found in
the filter plant backwash. The backwash water and solids are discharged into the
wastewater equalization basin and are a source of fecal coliform found in the WWTP.
Influent Wastewater (#3): The WWTP influent is a mix of sanitary and process wastewater.
The influent was found to contain fecal coliform. The combined influent wastewater along
with the filter backwash water is screened, pumped and stored in the 3.0-MG equalization
basin.
Sludge Thickener and Digester (#4,6): Fecal coliform were detected in the sludge thickener
filtrate and WWTP digester solids. Normally, when the sludge is transferred to the digester
from the aeration basin, the fecal coliform are in the waste MLSS. As the sludge moves
through the thickener, some of the coliform are lost to the thickener filtrate.
Aeration Basin and Effluent (#5,6,7,8): The aeration basin and effluent samples did not
detect fecal coliform. This is somewhat inconsistent with the equalization and
thickener/digester results since the equalization basin wastewater enters the aeration basin
and the MLSS is wasted to the digester via the thickener. This may be due to the natural
attenuation of the fecal coliform organisms that occur with water temperatures less than 98
degrees F. during the cooling and detention in the aeration basin.
Filter Plant and EQ Basin Solids (9,11): The water plant filter basin solids had ND results
when the river intake had positive readings. This would seem to indicate that the chlorine
in the water plant is providing disinfection or the fecal coliform naturally attenuate in the
basin solids. The last sample of solids collected was also a ND and this sample was taken
when the chlorination system was out of service.
G50I3210.0002/Rpt-dpQey1
iv3099
6

WestPoint Stevens
Bath Products Division
Fecal Coliform Study
IV OPERATIONAL ISSUES
In addition to sampling for fecal coliform, AG&M has addressed operational issues that
could affect fecal coliform levels. There were two sources identified, the first was the
fecal coliform found in water plant backwash solids. To confirm this as a source, AG&M
collected several extra sets of solids samples from the bottom of the filter backwash basin.
Based on the sample data from the six basin solids samples, fecal coliform were not found.
The second concern was contamination of the equalization basin solids from the fecal
coliform in the manufacturing facility effluent. As mentioned previously, the WWTP
influent is mixed sanitary and process waste and is typically at pH 11 to 12 due to caustic
used in the manufacturing finishing and bleaching processes. This high pH is important
and has a significant effect in reducing the fecal coliform bacteria in the wastewater.
However, when the WWTP influent is pumped to the equalization basin some of the fecal
material may settle as solids to the bottom of the equalization basin and survive the high
pH. The equalization basin has limited mixing capabilities that allow a significant build up
of solids in the basin. These solids degrade forming organic acids that lower the pH in the
solids. The equalization basin solids sampled October 26 indicate that the pH varies from
7.3 to 11.9 but the samples taken did not contain fecal coliform.
Fecal coliform do not survive in a high pH environment but they do survive in warm
neutral pH conditions. Although the samples of the equalization basin solids did not
indicate the presence of fecal coliform, it appears that the solid accumulation may
negatively affect the attenuation of fecal coliform provided by the high pH in the plant
influent.
In addition to the solids buildup in the equalization basin, there is concern that there is
short-circuiting between the influent pipe location and the equalization basin pump
suctions due to the absence of basin baffles. The basin is also occasionally operated at low
levels that reduces the detention time significantly.
GS023210.0 02/Rpt.doaev1
12/3099
7

WestPoint Stevens
Bath Products Division
Fecal Coliform Study
V. CONCLUSIONS AND RECOMMENDATIONS
River Water as a Fecal Coliform Source
The samples collected confirm that the river is contaminated with fecal coliform. This may
year. samples
should be periodically taken of the backwash water until results indicate consistent Lv/ 1}4 ,gitG
7-13
Gd
be seasonal, the result of high summer river water temperatures, and this source should be 0 A/L 7 f} Pdb
verified by monthly fecal coliform sampling during rest of the Additional disinfection of the river water. The location of the disinfection may need to be relocated to
the river water intake pump discharge. This will improve mixing and contact time UnAiiP
resulting in disinfection that is more consistent.
Sanitary Wastewater as a Fecal Coliform Source
The fecal coliform data collected from the influent wastewater confirmed the presence of
fecal coliform. The sample of process wastewater (#10) indicated no fecal coliform. There
are several options for controlling or treating the sanitary waste as a source.
The first option is to treat and/or disinfect the sanitary waste separately prior to combining
with the process waste. This method has been tried at other facilities with limited success
and complete control or segregation is difficult. This WWTP receives sanitary waste from
the manufacturing plants plus sanitary waste at the water and wastewater plants. The
success of this option would depend on the ability to identify and segregate all sanitary
sources and that they would remain segregated. It would also depend on adequate
disinfection before combining with the process wastewater for discharge.
The second option is to segregate the sanitary waste and pump it to a local municipality
(POTW) for treatment. This has some of the same disadvantages as the first because it is
difficult to eliminate all cross connections. This option has the advantage of not needing
separate treatment and disinfection but the loss of nutrients to the process waste treatment
system may require supplemental nutrient addition
The third option is to identify the sources of sanitary waste connections to the process
sewer and install sanitary sewage grinder pumps in each source to macerate the sewage
solids into a slurry. This pretreatment would increase the exposure of the solids to the
process waste resulting in better attenuation of the fecal coliform bacteria
hi
SooPe&�
it) Lim rArs Wdua
,tom c CiOtP
pus -Mt '
5-6 ni JAI
CoviimAn
GS023210.0002A1p1.dooevt
12/3099
8

WestPoint Stevens
Bath Products Division
Fecal Coliform Study
Equalization Basin as a Treatment Process
The equalization basin provides the detention of wastewater containing fecal coliform in
the presence of high pH that is known to be an effective disinfectant. The level of
disinfection will depend on the time, temperature and pH in the basin. The effectiveness is
improved by increasing detention and having good mixing to contact the fecal coliform 45 S d1P72511
bacteria with the high pH. The settled solids from the wastewater and filter plant along
with inadequate mixing contribute to the inconsistent fecal coliform removal.
Recommendations
ARCADIS Geraghty & Miller recommends that WestPoint Stevens address the fecal
coliform sources, increase the effectiveness of the equalization basin disinfection and
reduce solids accumulation in the equalization basin by considering the following:
— • Disinfect the river intake water prior to entering the water treatment facility, possibly at
the discharge of the river pumps to maximize the contact time and mixing.
• Install a filter plant backwash water clarifier for water plant solids thickening. The
solids would be wasted directly to the WWTP sludge digester or a sludge disposal
truck. Water would be returned to the filter plant intake.
— • Install sanitary sewage grinder pumps on all sources of sanitary wastewater to reduce
fecal coliform containing solids to a slurry.
• Operate the equalization basin at a high water level to increase the detention time of
influent with the high pH of the process waste.
• Evaluate the possibility of dividing the equalization basin into multiple sections to
prevent short-circuiting of fecal coliform from the influent pipe area to the aeration
basin.
• Evaluate/modify/replace mixing equipment to reduce solids buildup and increase solid
contact with the wastewater
cao-7-Li
23e:3/6A/2/„Ap-71_,
Based on the results of this fecal coliform study and the above recommendations,
ARCADIS Geraghty & Miller proposes that WestPoint Stevens proceed with a preliminary
design and cost/benefit study for the recommended corrective actions for fecal coliform
compliance. WPS would then evaluate the cost and benefit analysis to select the options
that are appropriate to proceed with. The design study would then be developed into a
Preliminary Engineering Report (PER) for submittal to NCDENR .
GS023210.0002/Rpttlovevl
12/3099
9

Appendix A

ARCAD1S GERAGHTY&MILLER
Yancy D. Helton
Division Director of Engineering
Bath products Division
Westpoint Stevens Inc.
19320 Airbase Rd.
Wagram, NC 28396
910-369-4111
Subject
Meeting Minutes and Summary of Activity 8/12/99
ARCADIS Geraghty & Miller Project No. GS023210.0000
Dear Yancy,
Thanks again for taking the time to meet with Dave Holland and me on August 18th.
To keep you apprised of the results of our sampling activities we will send regular
updates. Included in this letter are both sampling program, meeting minutes and a
summary of the fecal coliform results from samples taken during our visit.
Meeting Minutes:
Attending: Dave Holland, Scott Bolo, Yancy Helton, Wesley Adams, and Herman
Benton
ARCADIS briefly explained the sampling locations and procedures and
discussed the various forms of coliform bacteria. Westpoint Stevens (WPS) asked
several questions about conditions contributing to fecal coliform levels.
Temperature was suspect as discharge water has a relatively high water
temperature. Several areas for coliform proliferation were identified as suspect.
For example, ARCADIS noted that the EQ basin was at a low level and as such
would have a reduced detention time. ARCADIS recommends raising the water
level to increase detention time. ARCADIS was asked to consider operational
changes and options (other than chlorination) that would reduce the fecal coliforms.
Sampling Program:
Samples were collected from sites located around the plant as identified in
Table 1 (attached). The results varied from non -detect in the effluent to 140,000
per 100 mL in the digester solids.
ARCADIS Geraghty & Miller is the worldwide name of Piedmont Olsen Hensley
ARCADIS Geraghty & Miller. Inc
420 Park Avenue
Greenville
South Carolina 29601
Tel [phone]
Fax [phone]
WATER AND WASTE
MANAGEMENT
Date:
24 August 1999
Contact
Scott Bolo
Extension:
241-5112

ARCADIS GERAGHTY&MILLER
Table 1. Results of Fecal Colifi
SAMPLE LOCATION
SAMPLE RESULTS
(CoVl00ml)
RIVER INTAKE
140
WATER FILTER BACKWASH (w/Cl)
180
RAW WASTE INFLUENT
400
DIGESTER SOLIDS
140000
EQ BASIN DISCHARGE
1000
SLUDGE THICKENER FILTRATE
300
EFFLUENT SAMPLE
Non -Detect
AERATION BASIN MLSS
Non -Detect
EQ BASIN SOLIDS (edge of liner)
Non -Detect
Page:
2/3

ARCADIS GERAGHTY&MILLER
Yancy D. Helton
Division Director of Engineering
Bath Products Division
WestPoint Stevens Inc.
19320 Airbase Rd.
Wagram, NC 28396
910-369-4111
Subject
Summary of Sampling Activity 9/2/99
ARCADIS Geraghty & Miller Project No. GS023210.0000
Dear Yancy,
On Thursday, September 2nd ARCADIS Geraghty & Miller collected a second set
of samples from various locations on your site. Collecting a second set of
samples/data points, should confirm the presence of fecal coliforms in the system.
Since fecal coliforms from the sanitary waste andriver water are in the system then
the potential for fecal coliforms in the effluent is present. The following activities
may help to minimize the proliferation of fecal coliforms:
1. Continue to maintain a high equal;ization basin water level and hence longer
retention.
2. Keep the pH of the incoming wastestream as high as possible.
3. Minimize in plant process water discharge temperatures - fecal coliforms like
warm water.
4. Continue chlorination of incoming river water, prior to the filtration plant.
Nonetheless, there will always be the potential for violations when the system is
treating both sanitary and process wastewater.
As the follow-up to a request by WestPoint Stevens, ARCADIS Geraghty & Miller
have evaluated opportunities for upgrade of the facility. At this time, it appears that
segregating the sanitary waste from the process waste would prove beneficial and
should be investigated as an option. We recommend moving some of the sampling
upstream. This will allow us to evaluate the fecal coliform content in the process
wastestreams. If sampling confirms that no fecal coliforms are present in the
process wastestream then we could investigate segregating the sanitary waste and
disinfecting it with either Chlorine, Ozone or UV light.
This strategy of testing upstream will ensure that fecal colifonns are not entering the
WWTP through the process wastestream.
ARCADIS Geraghty & Miner is the worldwide name of Piedmont Olsen Hensley
ARCADIS Geraghty & Miller, Inc
420 Park Avenue
Greenville
South Carolina 29601
Tel [phone]
Fax [phone]
WATER AND WASTE
MANAGEMENT
Date:
3 September 1999
Contact
Scott Bolo
Extension:
241-5112

ARCADIS GERAGHTY&MILLER
Hence, the likelyhood of success of segregation can be confirmed prior to
investigation of the segregation effort and capital investment. The source of the
fecal coliforms can be eliminated and compliance can be assured for the WestPoint
Stevens Wagram Facility.
In an effort to optimize the sampling regime and complete an inital review of the
requirements for segregation, ARCADIS Geraghty & Miller would like to review
the facility drawings. These drawings will be used to find process outfalls. These
locations will then be sampled following Westpoint Stevens approval.
We will call in a few days with results of the second sampling event and discuss
these additionalsampling options. If you have any questions please do not hesitate
to call Dave Holland or myself.
Best Regards,
Scott T. Bolo M.E.
Project Engineer
ARCADIS Geraghty & Miller
Report Completed by: Scott Bolo
Copies:
Dave Holland

ARCADIS GERAGHTY&MILLER
Yancy D. Helton
Division Director of Engineering
Bath Products Division
WestPoint Stevens Inc.
19320 Airbase Rd.
Wagram, NC 28396
Subject:
Fecal Coliform Project Summary of Activity Sept, 8, 1999
ARCADIS Geraghty & Miller Project No. G5023210.0000
ARCADIS Geraghty & Miller, Inc.
420,Park Avenue
Greenville
South Carolina 29601
Tel [phone]
Fax [phone]
WATER AND WASTE
MANAGEMENT
i
Dear Yancy, Date:
September 23, 1999
ft
As mentioned in our letter of August 1999, to keep you apprised of the results of
our sampling activities we will send regular updates. Included in this letter you will
find a summary of both of the sampling events.
Sampling Summary
A second set of fecal coliform samples were collected on 9/2/99 from the same sites
located around the water and wastewater plant. The September results are as shown
in the following table
. Results of Fecal
SAMPLE LOCATION
SAMPLE
8/10/99
(FC/100m1)
SAMPLE
9/2/99
(FC/100m1)
RIVER INTAKE
140
ND
WATER FILTER BACKWASH (w/Cl)
180
ND
RAW WASTE INFLUENT
400
ND
DIGESTER SOLIDS
140,000
7,000
EQ BASIN DISCHARGE
1,000
ND
SLUDGE THICKENER FILTRATE
300
ND
EFFLUENT SAMPLE
ND
ND
AERATION BASIN MLSS
ND
ND
EQ BASIN SOLIDS (edge of liner)
ND
ND
This second set of samples contained significantly less fecal coliform when
compared to the first set of samples. The cooler weather and the higher equalization
basin level and longer equalization time may have resulted in these decreases in
fecal coliform levels. The time and temperature both have an effect on the increase
or decrease of fecal coliform contamination in the water. ARCADIS Geraghty &
Miller recommends that the water level in the equalization basin be maintained as
ARCADIS Geraghty & Miller is the worldwide name of Piedmont Olsen Hensley
Contact:
Scott Bolo
Extension:
241-5112

ARCADIS GERAGHTY&MILLER
high as possible to maximize the detention times. This is a factor that can be
controlled without the expenditure of additional capital.
I would like to schedule another sampling event and meeting with you the week of
September 27th. At this meeting I would like to discuss the opportunity for
sampling upstream in the process and plant wastewater collection system. If you
have drawings of the collection system and locations of the process discharges
available for this meeting, it would help in identifying possible sampling locations.
I will call you early next week and try to firm up a date and time for this meeting to
take place.
If you have any questions or comments please feel free to contact me at your
convenience.
Regards,
Scott T. Bolo, ME
Project Engineer
c: Wesley Adams
Dave Holland
Page:
2/2

RE
ARCAD1S GERAGHTY&MILLER
Yancy D. Helton
Division Director of Engineering
Bath Products Division
WestPoint Stevens Inc.
19320 Airbase Rd.
Wagram, NC 28396
910-369-4111
Subject
Meeting Minutes and Summary of Activity 9/30/99
ARCADIS Geraghty & Miller Project No. GS023210.0000
Dear Yancy,
Thanks again for taking the time to meet with me on Thursday, September 30.
Included in this letter are meeting minutes.
Meeting Minutes:
Attending: Scott Bolo, Yancy Helton, and Herman Benton
ARCADIS Geraghty & Miller reviewed the plant drawings with WestPoint
Stevens (WPS) staff. Sanitary waste lines were confirmed to tie into the process
wastewater. It appears as if the sanitary lines can be segregated from the process
lines without a major effort. However, the accuracy of the as -built drawings is
uncertain. WPS indicated a walk through on the plant would be necessary to
identify all of the sanitary lines that tie into process wastewater piping.
WPS voiced concerns over the level of fecal coliforms in the river water.
Recent articles in the local newspaper have documented high levels of fecal
coliform in the river water. WPS uses this water as process water for the plant. As
the water enters the water plant sludge builds up in the receiving basin. If fecal
coliforms are present in the river in high levels this sludge could be another source
of fecal coliform bacteria.
Based on servations of WPS staff, fecal levels appear to increase in the river
water when thereobare high levels of precipitation. Given several recent rain events
of significance, WPS and ARCADIS Geraghty & Miller agreed that filter basin
solids and equalization basin solids should be checked again for presence of fecal
coliforms.
WestPoint Stevens (WPS) asked several questions about conditions
contributing to coliform analytical positives and the statistical variability of
biological tests. WPS is concerned with the accuracy of the fecal coliform test.
ARCADIS Geraghty & Miller is the worldwide name of Piedmont Olsen Hensley
ARCADIS Geraghty 8 Miller. Inc
420 Park Avenue
Greenville
South Carolina 29601
Tel [phone]
Fax [phone]
WATER AND WASTE
MANAGEMENT
Date:
1 October
Contact
Scott Bolo
Extension:
241-5112

1
1
•
ARCADIS GERAGHTY&MILLER
ARCADIS Geraghty & Miller and WPS agreed that multiple samples would be
taken from the same locations in an effort to evaluate the variability of both the test
and fecal coliforms in adjacent but discrete locations.
If fecal coliforms are not found in the river water or water plant then the
coliforms are almost certainly from the WPS plant. Dye Range/ Bleaching Line
wastewater was sampled In the event that segregation were chosen as the preferred
management method. If coliforms are found to be present in the process line
wastewater then it wouldn't make sense to segregate it.
Table 1. Testing on 9/30/9
SAMPLE LOCATION
SAMPLE TAKEN
RIVER INTAKE
2
DYE RANGE / BLEACHING
2
WATER PLANT FILTER BASIN
SOLIDS
3
EQ BASIN SOLIDS
3
We will forward the lab results and when they are reported. If you have any
questions or comments please feel free to give me a call.
Sincerely,
Scott T. Bolo, ME
Project Engineer
ARCADIS Geraghty & Miller
864/242-1717
[e-mail]
cc: Dave Holland, Herman Benton

ARCADIS GERAGHTY&MILLER
Yancy D. Helton
Division Director of Engineering
Bath Products Division
WestPoint Stevens Inc.
19320 Airbase Rd.
Wagram, NC 28396
Subject
Fecal Coliform Project Analytical Summary
ARCADIS Geraghty & Miller Project No. GS023210.0000
Dear Yancy,
As mentioned in our letter of August 1999, to keep you apprised of the results of
our sampling activities we will send regular updates. Included in this letter you will
find a summary of all three of the sampling events.
Sampling Summary
A third set of fecal coliform samples were collected on 9/30/99 from sites located in
and around the water and wastewater plants and production areas. The results from
these three sampling events are as shown in the following table.
Results of Fecal Coliform Testing at WPS Wa ram NC
ARCADIS Geraghty & Miller, Inc.
420 Park Avenue
Greenville
South Carolina 29601
Tel [phone]
Fax [phone]
WATER AND WASTE
MANAGEMENT
Date:
October 2, 1999
Contact
Scott Bolo
Extension:
241-5112
g
SAMPLE LOCATION
SAMPLE 8/10/99
(FC/100m1)
SAMPLE
9/2/99
(FC/100m1)
SAMPLE*
9/30/99
(FC/100m1)
RIVER INTAKE
140
ND
2500, 620
WATER FILTER BACKWASH (w/C1)
180
.ND
-
RAW WASTE INFLUENT
400
ND
DIGESTER SOLIDS
140,000
7,000
EQ BASIN DISCHARGE
SLUDGE
1,000
ND
THICKENER FILTRATE
300
ND
EFFLUENT SAMPLE
ND
ND
-
AERATION BASIN MLSS
ND
ND
EQ BASIN SOLIDS (edge of liner)
ND
ND
ND, ND, ND
DYE RANGE
-
-
ND, ND
WATER PLANT BASIN
*Du licate 1
-
-
ND, ND
p samp es were collected from each location. Therefore, each location
has multiple data.
ARCADIS Geraghty & Miller is the worldwide name or Piedmont Olsen Hensley

ARCADIS GERAGHTY&MILLER
As we suspected the river water did contain high levels of fecal coliform. However,
fecal coliforms were not detected in the water plant basin. This would seem to
indicate that the chlorination being used at the water plant can be effective in
removing fecal coliform from the water. However, this was not the case with the
August sampling event. Additional confirmation tests should be taken during the
next sampling event. It may be that the carbon in the filter bed offset the chlorine
activity for a brief period of time.
Fecal coliforms were not detected in the equalization basin solids either. As
mentioned in the notes from the second sampling event, the cooler weather, higher
equalization basin level and longer equalization time may be causing these decreases
in fecal coliform levels.
I would like to schedule another sampling event and meeting with you the week of
October 18th. I would like to discuss additional sampling in the process and plant
wastewater collection system. We should also discuss the findings of the plant
walk through to identify cross connects between sanitary and process wastewater
(including the Scotland Plant).
I will call you early next week and firm up a date and time for this meeting.
If you have any questions or comments please feel free to contact me at your
convenience.
Regards,
Scott T. Bolo, ME
Project Engineer
ARCADIS Geraghty & Miller
[e-mail]
cc: Wesley Adams
Herman Benton
Dave Holland

LZIL
ARCADIS GERAGHTY&MILLER
Yancy D. Helton
Division Director of Engineering
Bath Products Division
WestPoint Stevens Inc.
19320 Airbase Rd.
Wagram, NC 28396
910-369-4111 _
Subject
Meeting Minutes and Summary of Activity 10/30/99
ARCADIS Geraghty & Miller Project No. GS023210.0000
Dear Yancy,
Thanks again for taking the time to meet with me on Tuesday, October 30. Included
in this letter are meeting minutes and a DRAFT outline of the report detailing
findings etc.
Meeting Minutes:
Attending: Scott Bolo, Yancy Helton, Wesley Adams, Herman Benton and George
Brown
ARCADIS Geraghty & Miller (AG&M) reviewed both historical findings and
the findings from the three sampling events completed to date. WPS indicated that
a disinfection system does not appear to meet their goals/needs. Instead WPS
indicated that the following items were a priority for the fmal report.
The following list are items that were identified as most important:. _.,,,_
1) Handling of filter plant sludge - Action: propose a method for segregation;
2) Better mixing in the equalization basin - Action: propose methods;
3) Improved aeration in aeration basin- Action: propose methods;
4) Installation of grinder pumps on sanitary lines - Action: evaluate options.
Please note these items are a change from the original scope and would require
additional information to complete. We will need facility drawings of the water
plant, equalization basin, aeration basin, and sanitary collection system. We will
also need operating schedules, volumes and wastewater characteristics for the water
plant in order to properly size equipment for a preliminary estimate of probable
cost. At your request, we will prepare an estimate of time and expense to complete
this additional work.
ARCADIS Geraghty & Miller. Inc.
420 Park Avenue
Greenville
South Carolina 29801
Tel [phone]
Fax [phone]
WATER AND WASTE
MANAGEMENT
Date:
November 2, 1999
Contact
Scott Bolo
Extension:
241-5112
ARCADIS Geraghty & Miller Is the worldwide name of Piedmont Olsen Hensley

ARCADIS GERAGHTY& MILLER
WPS and AG&M agreed that based on the available data the equalization basin
and filter backwash and water plant basin solids are a source of fecal coliforms. A
portion of the solids come from the water plant. As these solids settle in the
equalization basin they promote anaerobic degradation of the organic material in
the solids. This anaerobic activity lowers pH in the equalization basin in some
locations (see included data) thereby: reducing the effect of high pH plant effluent.
WPS and AG&M agreed that the equalization basin and water plant would be
sampled again. The location and quantity of samples are listed in Table 1. The
water plant chlorine feed was temporarily out of order.
Table 1. Testing on 10/26/99 at
SAMPLE LOCATION
SAMPLE TAKEN
pH of Samples
WATER PLANT FILTER BASIN
SOLIDS
4 (spaced evenly)
_
EQ BASIN SOLIDS
6 (spaced evenly in dead -zones)
7.3, 8.6, 11.9, 9.9,
11.0, 7.9
Equalization Basin Sampling
1
2
ID
3
4
6
5
Numbers = Sample Points
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2/3

ARCADIS GERAGHTY&MILLER
If you have any questions or comments please feel free to give me a call.
Sincerely,
•
Scott T. Bolo, ME
Project Engineer
ARCADIS Geraghty & Miller
864/242-1717
[e-mail]
cc: Dave Holland, Wesley Adams, Herman Benton
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Appendix B