NC0086924_Permit Issuance_20010323

State of North Carolina
Department of Environment
and Natural Resources
Division of Water Quality
Michael F. Easley, Governor
William G. Ross, Jr., Secretary
Kerr T. Stevens, Director
March 23, 2001
Mr. J.D. Brickhouse, County Administrator
Tyrrell County
108 S. Water Street
Columbia, North Carolina 27925
Dear Mr. Brickhouse:
L
NCDENR
NORTH CAROLINA DEPARTMENT OF
ENVIRONMENT AND NATURAL RESOURCES
Subject: NPDES Permit Issuance
Tyrrell County Reverse Osmosis Discharge
Permit No. NCO086924
Tyrrell County
In accordance with the application for discharge permit, the Division is forwarding
herewith the subject NPDES permit. This permit is issued pursuant to the requirements of North
Carolina General Statute 143-215.1 and the Memorandum of Agreement between North Carolina
and the U.S. Environmental Protection Agency dated May 9, 1994.
The Division of Water Quality received significant comments from the Division of Marine
Fisheries (DMF) regarding the potential impact of the discharge into Bull Bay. The DMF had
requests for more extensive monitoring to determine the potential impact to the ecosystem. Based
on their concerns and comments, as well as the Division of Water Quality's concerns that limits
can be consistently met, the permit has been modified as follows:
• The predicted salinity of the discharge is a. concern in this area. Predicted values are higher
than current values in the area due to the fresh water inflow from Bunton and Deep Creeks
into Bull Bay and may have an adverse effect on aquatic life. Because there is uncertainty in
predicting the full extent of this type of discharge, instream monitoring for salinity at various
areas in the Bay is required. Special Condition A.4. has been inserted into the permit
indicating the instream monitoring locations and frequencies. Tyrrell County may request that
the Division re-evaluate the instream monitoring requirements after 2 years of data has been
collected.
• Another concern regarding the discharge is the elevated value of ammonia as nitrogen in the
deep well sample. This compound can adversely affect aquatic life and deplete oxygen levels in
Bull Bay. Monitoring for ammonia as nitrogen has been included in the permit. Instream
monitoring for dissolved oxygen, along with temperature, will be included as part of the
required monitoring in the special condition discussed previously.
• A settleable solids limit has been added to the permit. Should the county demonstrate that
there are not settleable solids in the effluent, after one year of data has been collected, the
county may request that monitoring for this parameter be reduced or eliminated from the
permit.
• An additional comment submitted by the DMF pertained to a holding basin or lagoon, sized to
hold all effluent flow "until such times that dilution is maximized and impacts are minimized."
At this time, the Division is unsure of how long those times would be and when they would be.
so this condition has not been added to the permit. However, should the limits given in the
permit not be consistently met, the DWQ may require that a holding lagoon or other type of
treatment be installed at the plant.
• The DMF has requested that they be copied on, at minimum, all instream monitoring data.
Please forward copies of instream monitoring data in care of Sara Winslow, DMF, at the
address listed on the next page of this letter.
1617 MAIL SERVICE CENTER, RALEIGH, NORTH CAROLINA 27699-1617 - TELEPHONE [phone]/FAX [phone]
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VISIT US ON THE WEB AT http://h2o.enr.state.nC.us/NPDES r

Mr. Brickhouse
Page 2
Please take notice that this permit is not transferable except after notice to the Division of
Water Quality. The Division of Water Quality may require modification or revocation and
reissuance of the permit.
This permit does not affect the legal requirements to obtain other permits which may be required
by the Division of Water Quality, the Division of Land Resources, the Coastal Area Management Act, or
any other federal or local governmental permit.
If you have any questions regarding the final NPDES permit, please contact Susan Wilson
at (919) 733 - 5083, extension 510.
Sincerely,
•�,.,pcerr T. Stevens
cc: Central Files
Point Source Compliance and Enforcement Unit
Washington Regional Office/Water Quality Section/ Alton Hodge
NPDES Unit
Aquatic Toxicology Unit
Eric Weatherly, HU&Ass. P.O. Drawer 1929
Nags Head, NC 27959
Robin Peele, DEH/PWS
Sara Winslow, Northern District Manager, DMF
P.O. Box 769
Morehead City, NC 28557

Permit No. NCO086924
STATE OF NORTH CAROLINA
DEPARTMENT OF ENVIRONMENT AND NATURAL RESOURCES
DIVISION OF WATER QUALITY
PERMIT
TO DISCHARGE WASTEWATER UNDER THE
NATIONAL. POLLUTANT DISCHARGE ELIMINATION SYSTEM
In compliance with the provisions of North Carolina General Statute 143-215.1, other lawful
standards and regulations promulgated and adopted by the North Carolina Water Quality
Commission, and the Federal Water Pollution Control Act, as amended,
Tyrrell County
Tyrrell County Reverse Osmosis Water Treatment Plant Discharge
is hereby authorized to discharge wastewater from a facility located at
Tyrrell County RO Plant
Off NCSR 1202
Tyrrell County
to receiving waters designated as Bull Bay in the Pasquotank River Basin
in accordance with the discharge limitations, monitoring requirements, and other conditions set
forth in Parts I, II, III, and IV hereof.
This permit shall become effective May 1, 2001.
This permit and the authorization to discharge shall expire at midnight on December 31, 2002.
Signed this day March 23, 2001.
r
rr T. Stevens, Director
Division of Water Quality
By the Authority of the Environmental Management Commission
Tyrrell County Reverse Osmosis
NPDES Permit No. NCO086924

Permit No. NCO086924
SUPPLEMENT TO PERMIT COVER SHEET
Tyrrell County Reverse Osmosis Water Treatment Plant
RO Reject Discharge Wastewdter
is hereby authorized to:
1. After receiving an Authorization to Construct permit from the Division of Water Quality,
construct outfall and other applicable appurtenances for treatment of reverse osmosis
water treatment plant reject water to be located off NCSR 1202, Tyrrell County, and
2. Discharge reject wastewater from said treatment works at the location specified on the
attached map into Bull Bay which is classified SB waters in the Pasquotank River
Basin.
Tyrrell County Reverse Osmosis
NPDES Permit No. NCO086924

B A Y
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Latitude: 35*56-16" Sub -Basin: 03-01-53
Facility �
Lonpl IdP.: 76021'15" Location
Llua�#. C295W, Columbia West
Stream Class: 513 11
ger .ivina S rpam• Bull Bay, Pasquotank River Basin Tyrrell Count
Permitted -Flow: 0.216 MGD Y y
Reverse Ocmoeia Reject Water
NC0056924

U,
A (1). EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS
During the period beginning on the effective date of the permit and lasting until expiration, the
Permittee is authorized to discharge from outfall(s) serial number 001- Reverse Osmosis Reject
Water. Such discharges shall be limited and monitored by the Permittee as specified below:
EFFLUENT
CHARACTERISTICS
DISCHARGE LMTATIONS .
Monitoring Requirements ._
Monthly Average
`. Daily Maximum..
Measurement
Frequency
Sample Type
Sample
- Location1
Flow (MGD)
0.216 MGD
Continuous
Recording
I or E
Total Suspended Solids
30.0 m /L
45.0 m /L
Monthly
Grab
E
TurbiditV2
Monthly
Grab
E
Iron
Monthly
Grab
E
Settleable solids
0.1 m2/1
0.2 ml/1
Monthly
Grab
E
Dissolved Oxygen
1
Grab
Instream
Temperature
1
Grab
Instream
NH3-N
Monthly
Grab
E
H3
Monthly
Grab
E
Total Residual Chlorine
Monthly
Grab
E
Aluminum
Monthly
Grab
E
Arsenics
50 u /L
Monthly
Grab
E
BerylliUM5
0.117 u /L
Monthly
Grab
E
Cadmiums
42 u /L
Monthly
Grab
E
Chromium (Total)5
Monthly
Grab
E
anide5
1 u /L
Monthly
Grab
E
Iron
Monthly
Grab
E
Leads
221 u /1
Monthly_Grab
E
Mercurv5
0.025 u /L
Monthly
Grab
E
Nickels
75 u /L
--IRonthly
Grab
E
Seleniums
71 u /L
Monthly
Grab
E
Silvers
Monthly
Grab
E
Zincs
Monthly
Grab
E
Copper5
Monthly
Grab
E
Salinity
Monthly'
Grab
E & Instream
Chloride
Monthly
Grab
E
TOC
Monthly
Grab
E
Fluorides
Monthly_Grab
E
Total Phosphorus
Monthly
Grab
E
Acute ToxiCity4
Quarter!
Grab
E
NOTES:
1 Sample Locations: I - Influent; E - Effluent, Instream - see Part 1, Special Condition A.(4). for locations
and frequencies.
2 The discharge shall not cause the turbidity of the receiving water to exceed 25 NTU. If the turbidity
exceeds this level due to natural background conditions, the discharge level cannot cause any increase in
the turbidity of the receiving water.
3 The pH shall not be less than 6.8 standard units or greater than 8.5 standard units.
4 Acute Toxicity Monitoring (Mysid) 24hr P/F ® 90%, Quarterly; January, April, July, and October. See
Special Condition A(2).
s Upon sampling for 12 months, the Permittee may request a review of reasonable potential for monitoring
and effluent limitations.
THERE SHALL BE NO DISCHARGE OF FLOATING SOLIDS OR VISIBLE FOAM IN OTHER THAN TRACE
AMOUNTS.
Tyrrell County Reverse Osmosis
NPDES Permit No. NCO086924

A (2). ACUTE TOXICITY PASS/FAIL MONITORING (QRTRLY)
The permittee shall conduct acute toxicity tests on a guarterlu basis using protocols defined in the
North Carolina Procedure Document entitled "Pass/Fail Methodology For Determining Acute
Toxicity In A Single Effluent Concentration" (Revised -July, 1992 or subsequent versions). The
monitoring shall be performed as a Mysidopsis bah.ia 24 hour static test. The effluent
concentration defined as treatment two in the procedure document will be 90%. Effluent samples
for self -monitoring purposes must be obtained during representative effluent discharge below all
waste treatment. The tests will be performed during the months of January, April, July, and
October.
All toxicity testing results required as part of this permit condition will be entered on the Effluent
Discharge Monitoring Form (MR-1) for the month in which it was performed, using the parameter
code TGE3E. Additionally, DWQ Form AT-2 (original) is to be sent to the following address:
Attention: Environmental Sciences Branch
North Carolina Division of
Water Quality
1621 Mail Service Center
Raleigh, N.C. 27699-1621
Test data shall be complete and accurate and include all supporting chemical/physical
measurements performed in association with the toxicity tests, as well as all dose/response data.
Total residual chlorine of the effluent toxicity sample must be measured and reported if chlorine is
employed for disinfection of the waste stream.
Should there be no discharge of flow from the facility during a month in which toxicity monitoring
is required, the permittee will complete the information located at the top of the aquatic toxicity
(AT) test form indicating the facility name, permit number, pipe number, county, and the
month/year of the report with the notation of "No Flow" in the comment area of the form. The
report shall be submitted to the Environmental Sciences Branch at the address cited above.
Should the permittee fail to monitor during a month in which toxicity monitoring is required, then
monthly monitoring will begin immediately until such .time that a valid test is submitted. Upon
submission of a valid test, this monthly test requirement will revert to quarterly in the months
specified above.
Should any test data from this monitoring requirement or tests performed by the North Carolina
Division of Water Quality indicate potential impacts to the receiving stream, this permit may be
re -opened and modified to include alternate monitoring requirements or limits.
NOTE: Failure to achieve test conditions as specified in the cited document, such as minimum
control organism survival and appropriate environmental controls, shall constitute an invalid test
and will require immediate follow-up testing to be completed no later than the last day' of the
month following the month of the initial monitoring.
A (3). DISCHARGE SPECIAL CONDITION
The effluent diffuser must be designed to prevent surface turbulence and bottom scour. Should
the location of the discharge cause visible turbulence within Bull Bay, the Division may require
that the discharge be relocated.
Tyrrell County Reverse Osmosis
NPDES Permit No. NCO086924

A (4). INSTREAM MONITORING REQUIREMENTS
The following parameters shall be monitored within Bull Bay (at the locations indicated) 2/month
year round. Stratified samples [surface (within 1 foot) and bottom) shall be taken for each
parameter.
Parameter
Location
Frequency
Months
Salinity (ppt)
B, DR, M1,
2/month
January through
M2, M3, M4,
December (year round)
M5, M6
Temperature ( Q
B, DR, M1,
2/month
January through
M2, M3, M4,
December (year round)
M5, M6
D.O. (mg/1)
B, DR, M1,
2%month
January through
M2, M3, M4,
December (year round)
M5, M6
B - Background sample should be taken at or near the mouth of Bunton Creek, in the estuary,
outside the influence of the discharge
DPt - at the discharge point (approximately 100 feet from the shoreline)
M 1 - along a southwest/northeast transect from the discharge point, approximately 50 feet
northeast of the discharge
M2 - along a southwest/northeast transect from the discharge point, approximately 200 feet
northeast of the discharge
M3 - along a north/south transect from the discharge point, approximately 50 feet north of the
discharge
M4 - along a north/south transect from the discharge point, approximately 200 feet north of the
discharge
M5 - along a north/south transect from the discharge point, approximately 50 feet south of the
discharge
M6 - along a northwest/southeast transect from the discharge point, approximately 50 feet
northwest of the discharge
Should instream monitoring indicate little to no effect of the discharge on the salinity or dissolved
oxygen of the receiving water after 2 years of monitoring, the permittee may request that the
monitoring requirements be re-evaluated.
NOTE: Map on the following page is not to scale. The transect attempts to approximate the
optimal sampling points for prevailing winds.
Tyrrell County Reverse Osmosis
NPDES Permit No. NCO086924

A (4). INSTREAM MONITORING REQUIREMENTS (continued)
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Tyrrell County Reverse Oswmosis
NPDES Permit No. NCO086924

State of North Carolina
Department of Environment
and Natural Resources
Division of Marine Fisheries
Michael F. Easley, Governor
William G. Ross, Jr., Secretary
Preston P. Pate, Jr., Director
1�
NCDENR
NORTH CAROLINA DEPARTMENT OF
ENVIRONMENT AND NATURAL RESOURCES
MEMORANDUM
N
TO: David A. Goodrich R-
NC Division Of Water Quality
-2i
FROM: Preston P. Pate, Jr., Director
Division of Marine Fisheries
DATE: 3-2-01
SUBJ: NPDES / Tyrrell County Reverse Osmosis Treatment Plant
# NC 0086924
I have reviewed the comments provided by the District Manager and/or Bio-Supervisor
and concur with their recommendation(s).
Director, Date
Preston P.Pate, Jr.
Deputy Director, Date
Michael G. Bu
Habitat Protection ection Date
Section Chief,
Michael W. Street
P.O. Box 769, Morehead City, North Carolina 28557-0769 Telephone [phone] FAX [phone]
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State of North Carolina
Department of Environment
and Natural Resources
Division of Marine Fisheries
Michael F. Easley, Governor ^ n NCDENR
William G. Ross, Jr., Secretarypr,lr I i11��TAT
.+
NORTH CAROLINA DEPARTMENT OF
Preston P. Pate, Jr., Director ENVIRONMENT AND NATURAL RESOURCES
MEMORANDUM:
TO: David A. Goodric NC Division of Water Quality, NPDES Unit Supervisor
THROUGH: Mike St e , f, Habitat Protection Section
FROM: Sara E. Winslow, NC Division of Marine Fisheries, Northern District Manager
DATE: March 1, 2001
SUBJECT: Tyrrell County Reverse Osmosis Treatment Plant,
Draft NPDES Permit # NCO086924
The following comments by the North Carolina Division of Marine Fisheries (NCDMF)
on the subject permit are offered pursuant to G.S. 113-131. The NCDMF objects to the proposed
permit due to the toxic and habitat altering effects that the discharge will have on the biota of
Bull Bay and Albemane Sound. NCDMF sample data indicate that Bull Bay is an important
nursery and adult foraging area for many commercially and recreationally important fishes (e.g.,
striped bass, white perch, yellow perch, catfish, alewife, blueback herring, American eel, blue
crab, spot, croaker, flounder, menhaden, sunfish (Lenomis sp.) and largemouth bass).
This project will degrade the receiving waters, severely affecting existing uses. Such
degradation is a violation of the federal Clean Water Act, as well as applicable state laws, rules,
and policies. The NCDMF is extremely concerned that the discharge (108,000 GPD initially and
216,000 GPD at design capacity) would even be considered given that the Division of Water
Quality (DWQ) "has concerns that the limits can be consistently met". The limits that may not
be consistently met were not identified in the permit. Therefore, design modifications should be
explored prior to permit issuance to assure: (1) that limits can be met at design capacity; and (2)
that the concerns identified in this correspondence are considered based on design capacity
discharge. It appears therefore that sufficient information exists to support that the discharge as
presented should not be allowed into this very low salinity estuarine (brackish water) system.
The potential toxicity to aquatic resources and habitat altering effects of ammonia (NH4),
a nutrient, in the discharge is a principle concern. The estimated discharge concentration of
ammonia (NH4) is 15.86 mg/l. The ammonia nitrogen (NH3-N) of well -oxygenated waters is
relatively low (Wetzel 1975). Ammonia, while in its ionized form, NH4, is relatively nontoxic to
aquatic life. However, ammonia it its un-ionized form, NH3, is very toxic. As pH increases
above 6.0 ammonia as NH4 readily converts to NH3. Ammonia (NH3) is acutely toxic to aquatic
organisms at 4.0 mg/1 and may stress or cause death in some organisms at much lower levels. As
P.O. Box 769, Morehead City, North Carolina 28557-0769 Telephone [phone] FAX [phone]
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part of the natural nitrogen cycle, ammonia is oxidized and converted to nitrite (NO2). Nitrite can
be toxic to aquatic species, and the toxicity increases as pH falls below 7.5. Even if the ammonia
and nitrite levels are not toxic or stressful, the discharge will likely produce a net decrease in
dissolved oxygen as oxygen is consumed through nitrification. Reduced oxygen levels may
stress aquatic organisms or cause fish kills. Ammonia/nitrogen is readily utilized in the growth
processes of submerged aquatic vascular plants (SAV) and phytoplankton (algae). The discharge
may contribute to increased growth of SAV and algae in the bay. Algal blooms of some species
can be toxic to aquatic species, cause disruption of the aquatic food chain, and further reduce
oxygen levels.
Another concern is that the salinity of the discharge will be considerably higher than the
receiving waters. If our estimates are correct, the salinity of the discharge will be approximately
14,576 mg/1(ppm) or 14.6 ppt. DMF water quality data (bottom sample 8-9 ft depth) from Bull
Bay (one mile north of the proposed discharge) show that salinity ranged from 0.3 - 6.0 ppt
during July - October of 1996 - 1999. Salinity in this area is normally at its peak level during the
summer -fall season. Salinity (ppt) ranges for each year were: 0.3 - 1.9 in 1996; 1.8 - 3.6 in 1997;
0.5 - 3.5 in 1998; and 0.4 - 6.0 in 1999. Due to the influence of fresh water inflows from Bunton
and Deep creeks, natural background salinity at the discharge location should be less than these
sample data levels.
Many of the aquatic organisms endemic to this area are able to tolerate wide fluctuations
in salinity, however some species cannot. Prey items of larval and juvenile fishes could be
destroyed by the proposed discharge, and the eggs and larvae of some species would certainly be
affected. Also, the high salinity discharge will very likely disrupt the movement and migration
patterns of some fish species.
Another problem with the high salinity discharge is that salt water is heavier than fresh
water, and the discharge will likely produce or exacerbate (worsen) stratification of the water
column. A frequently occurring result of fresh water over salt water stratification is a condition
known as "dead water". "Dead water" is water that is hypoxic (low oxygen) or anoxic (no
oxygen). Hypoxic and anoxic conditions result in stress (e.g., poor body condition, reduced
resistance to disease) or death to most aquatic organisms.
The problems with ammonia as previously discussed can be intensified by anoxic
stratification. Wetzel (1975) noted that where appreciable amounts of organic matter reach the
hypolimnion of stratified lakes, NH3-N tends to accumulate. The accumulation of NH3-N greatly
accelerates under anoxic conditions, resulting in a marked release of NH4 from the sediments.
Bull Bay is an embayment of the Albemarle Sound and has at times significant to little or
no inflow. Based on our knowledge of area waters, wind tides have a significant effect on water
levels and movement in Bull Bay. These wind tides may cause periods of stagnation (no flow or
little movement at times) and reverse flow in the discharge area; thus, significantly reducing
dilution and increasing impacts of the discharge on the aquatic ecosystem. Mixing in the
discharge area of Bull Bay is further restricted by an extensive 3-4 foot shoal that extends across
the bay. The only deep -water (10-15 ft.) inlet/outlet is through a relatively small channel in the
shoal. The dilution factor in the receiving waters will greatly influence the potential impacts of
the salinity and nutrient loading of the discharge. The salinity and nutrient concentrations of the
discharge compared to background levels are sufficient to cause any and all of the situations
described above. When combining the potential effects of salinity and nutrients, it appears they
may complement each other to enhance the cumulative negative impacts on the ecosystem.
P.O. Box 769, Morehead City, North Carolina 28557-0769 Telephone [phone] FAX [phone]
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The NCDMF offers the following recommendations prior to further action on this permit:
1) Alternatives to the proposed discharge to Bull Bay should be fully evaluated (e.g.,
discharge to a deep salt water aquifer, transporting the effluent to a more suitable discharge
point located away from fresh waters).
2) The permittee should be required to do an Environmental Impact Study or Environmental
Assessment to evaluate the impacts of the discharge on water quality and biota in Bull Bay
and Albemarle Sound.
3) All evaluations and testing to assess the impacts of the discharge should be done based on
worst case scenarios for the receiving waters and effluent design capacity of the system.
If the discharge is permitted over our strong objections, the NCDMF requests that the following
conditions be included in the effluent limitations and monitoring requirements.
1) Conduct a weekly biological assessment before and after the discharge begins to document
changes in water quality, fauna, and flora in Bull Bay, both upstream and downstream of the
discharge for a period of at least four years.
2) The effluent should be stored and discharged when conditions are such that dilution is
maximized and impacts are minimized. This will require regular monitoring of the receiving
waters to determine opportune conditions.
3) Add acute toxicity testing of the effluent prior to the initial discharge for aquatic species that
are endemic to Bull Bay for various dilution rates similar to those expected in the bay near the
discharge.
4) Add instream monitoring throughout the bay to include sampling at the surface and bottom of
the water column.
5) Add effluent and instream monitoring for ammonia, nitrite, nitrate, and total nitrogen.
6) Add effluent and instream monitoring for conductivity and salinity and the components that
make up salinity (i.e., Ca, Mg, Na, K, CO3, HCO3, SO4, and Cl).
7) Add instream monitoring for temperature, dissolved oxygen, and pH.
8) Add limits for settleable solids.
Literature Cited
Wetzel, R.G. 1975. Limnology. W.B. Saunders Company. 743 p.
P.O. Box 769, Morehead City, North Carolina 28557-0769 Telephone [phone] FAX [phone]
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RE: RO Plants
Subject: RE: RO Plants
Date: Tue, 13 Mar 2001 14:20:07 -0500
From: Ed Lawler <[e-mail]>
To: 'Susan Wilson' <[e-mail]>
Ms. Wilson,
Here's our best shot at estimating the costs associated with the containment
structures you requested.
Assumptions:
* shallow water table will require each structure to be built at grade
utilizing berms.
* additional land can be acquired adjacent to each site.
* Stumpy Pt. site is all wetlands and will require additional wetland
and CAMA permits
* The following unit cost estimetes were used:
* lagoon & liner @ $3.00/sq. ft.
* seeding of berm @ $5,000/ acre
* Stumpy Pt. piping @ $6,000, additional pump station @ $100,000
* Tyrrell Co. Piping @$10,000, additional pump station @ $150,000
* Engineering and contingencies @ 30%
Cost estimates are as follows.
* Stumpy Pt. w/ 5-day containment pond $192,000
* Stumpy Pt. w/ 30-day containment pond $375,000
* Tyrrell Co. w/ 5-day containment pond $550,000
* Tyrrell Co. w/ 30-day containment pond $2,047,000
The final assumption is that money is available.
Sincerely,
Ed
-----Original Message -----
From: Susan Wilson (mailto:[e-mail])
Sent: Tuesday, March 13, 2001 12:57 PM
To: Ed Lawler
Subject: Re: RO Plants
How about looking at both a 5 day and 30 day holding time for both plants?
This
is similar to our 'requirements for spray discharges and will provide some
holding time should upsets or instream problems require. DWQ realizes that
30
day holding may not be an economically feasible option for Tyrrell, but
please
look into them and provide costs for lined basins (concrete or HDPE).
I'm aware that monitoring at the discharge point is a good place to monitor.
However, DMF (as well as DWQ) would be interested in transects through the
area
to determine the influence of the mixing zone. Likely, from your response,
I'll
put a special condition in stating that we will determine exact locations at
a
later time (and that you or they will work with DMF and our folks to come up
with feasible locations).
Ed Lawler wrote:
> Susan
> An RO plant takes water from the ground and pushes the water through a
1 of 2 3/15/01 8:55 AM

RE: RO Plants
> membrane. The membrane is fine enough to allow water to pass through but
> not the impurities in the ground water such as salts. The impurities pass
> straight through and are rejected in the discharge. The discharge during
> plant operation is continuous. A typical amount is that you can utilize 3
> gallons out of 4 gallons of ground water, the other gallon is discharge.
> The ground water impurities that were in the 4 gallons are concentrated
into
> the 1 gallon of discharge. RO treatment removes and discharges impurities
> continuously while conventional treatment removes impurities, concentrates
> them over time and then discharges a much higher concentration.
> Assume we are operating the plant 7124. That means we are discharging 75
> gpm times 1440 minutes per day equals 108,000 gal/day. It is impractical
> and has never been done to our knowledge to store the discharge. A lagoon
> sized to hold the discharge volume of varying duration ???? is impossible
to
> design for. What environmental conditions are favorable??? Salinity in
the
> Albemarle sound estuary typically demonstrates wide fluctuations in
salinity
> on a seasonable basis. After the water is stored, the discharge rate goes
> up proportionally.
> Regarding instream monitoring, both plants discharge to a bay which opens
to
> a sound. The monitoring locations are unlimited, however one would think
> that the area to monitor would be at the discharge location.
> Thanks
> Ed
> -----Original Message -----
> From: Susan Wilson[mailto:[e-mail]]
> Sent: Tuesday, March 13, 2001 11:19 AM
> To: El awl er@Hobbs Upchurch. com
> Subject: RO Plants
> Ed,
> Here's the exact verbage of the comment regarding the holding basin.
> Please provide me with information as to if or if not the discharge will
> be continuous and the feasibility of a holding basin/lagoon at both
> sites.
> -"The effluent should be stored and discharged when conditions are such
> that dilution is maximized and impacts are minimized. This will require
> regular monitoring of the receiving waters to determine opportune
> conditions."
> We'll likely add toxicity testing (full range) prior to operation and
> discharge. The permit already requires quarterly toxicity monitoring
> after discharge.
> Another comment ( we will include instream monitoring at both plants)
> was with regard to instream monitoring. If you can, please provide
> possible areas of instream monitoring around the discharge point which
> would provide the best information regarding salinity (to include
> surface and bottom). it may be that we include this as a special
> condition and work with our folks and Marine Fisheries to assess the
> best areas for instream monitoring.
2 of 2 3/15/01 8:55 AM

RE: Tyrre,11 Co and Dare Co. RO plants
Subject: RE: Tyrrell Co and Dare Co. R4 plants
Date: Tue, 6 Mar 2001 17:19:56 -0500
From: Ed Lawler <[e-mail]>
To: 'Susan Wilson' <[e-mail]>
-----Original Message -----
From: Susan Wilson [mailto:[e-mail]]
Sent: Monday, March 05, 2001 2:42 PM
To: [e-mail]
Subject: Tyrrell Co and Dare Co. RO plants
Ed (and please pass to Eric if necessary):
I received significant comments from the Div. of Marine Fisheries that
we'll have to resolve prior to issuance. Here's what we are proposing
to try to expedite and resolve their concerns (could you please inform
your client):
1) NH3-N monitoring will be required (why are the levels elevated in the
groundwater/well tests? - or what is typical).
2) Salinity values are a concern (freshwater influence in this area and
values are currently fairly low) and instream monitoring will be
required for this parameter and possibly others(do the permittees
currenity have access to or own a boat?). Also, could you please again
give me your RO concentrate estimates for salinity and how you arrived
at them?
3) Adding the requirement of a holding tank/equalization basin prior to
discharge to provide some opportunity for settling and a more
continuous/even flow. What size basin would you estimate?
Also, the plans and specs that I received recently for Tyrrell Co. - is
the proposed discharge point the same? (I have not yet opened the
plans).
I'm still planning to submit this for issuance prior to March 15, but
need these items commented on prior to issuance.
Thanks.
Ms. Wilson,
I would like to respond to your concerns mentioned above.
1.)The Tyrrell County NH3 does appear to be high and I have called the
certified lab to check on the reported results. When we did a preliminary
aquifer (Castle Hayne) analysis from a similar deep well located on a fish
farm about a mile away the ammonia level was 1.63 mg/l. Still a bit high but
not 3.4 mg/l. Preliminary design indicates a concentrate (discharge) flow of
75.2 gpm with a TDS of 13,547mg/l.This number is derived from an RO design
program. You put in about 17 raw water elements and depending on what type
of membrane you select it generates the discharge concentration(s). Thus far
the discharge points for Tyrrell & Dare are the same as what is dipicted on
the plans. I think the relatively shallow water allows for quicker
dispersion of the concentrate. Both sites should be able to supply some sort
of boat if monitoring requires.
The Dare County raw water analysis uses a completely different feed water
source to the membrane (Yorktown). Their raw water analysis did not call for
an ammonia analysis.However, their projected discharge concentration is 4320
mg/l.TDS
I think items 2&3 refer to a NPDES application we have for a water treatment
1 of 2 3/7/01 8:57 AM

RE: Tyrrell Co and Dare Co. RO plants
plant in Washington Co. The proposed discharge site is Kendrick Creek. Last
Friday (3/2) we got a list of alternatives from Mr. Goodrich and we are
working on that now. That plant has the backwash holding basin. The RO's
discharge as they process water.
I hope this clears things up but feel free to contact me if I can be of
further assistance.
Regards,
Ed Lawler
2 of 2 3/7/01 8:57 AM

Re: ammonia
Subject: Re: ammonia
Date: Mon, 05 Mar 2001 11:27:23 -0500
From: Dianne Reid <[e-mail]>
To: Susan Wilson <[e-mail]>
CC: Matt Matthews <[e-mail]>, Jason Wynn <[e-mail]>
We have never had an saltwater ammonia standard, as far as I can tell. The
new EPA criteria is for freshwater only. EPA did promulgate national
criteria for ammonia in saltwater in 1989. However, from what I can tell
there was too much uncertainty around the calculations to give us any
comfort in defending the criteria.
EPA's criteria is in unionized ammonia and is 0.035 mg/L for the chronic
values. To get to total ammonia there are equations that are salinity,
temperature and pH dependent. For temperatures & pHs in the coastal
plain range, the total ammonia chronic standard would be between 5.3 mg/L
and 1.8 mg/L at 10 ppt salinity; 5.6 and 1.9 mg/L at 20 ppt salinity; and
5.9 and 2.0 mg/L at 30 ppt salinity. The lower values are summer time
temperatures. The lowest pH they use is 7.0 which may be a little high
for saltwater.
Susan Wilson wrote:
> Matt, way back when, did NC develop any criteria for ammonia in salt:
> waters? i only see coastal plain and sandhills freshwaters (for the
> lower part of the state) - that Larry (or you and Larry) developed way
> back when.
> Dianne - do you have any info on ammonia in salt waters? and...i am
> having trouble making heads or tails out of the new proposed fed'l
> criteria (unless i sit here for a couple of hours reading it!). but i
> also can't find in there its applicability to salt waters.
DIANNE REID
DWQ PLANNING BRANCH
DEPT OF ENVIRONMENT & NATURAL RES
1617 MAIL SERVICE CENTER
RALEIGH NC 27699-1617
[phone] ext. 568
[phone] (fax)
"At one time, one blade of grass is as effective as a sixteen -foot
golden Statue of Buddha. At another time, a sixteen -foot golden
Statue of Buddha is as effective as a blade of grass." WU-MEN
1 of 1 3/5/01 12:17 PM

NORTH CAROLINA DEPARTMENT OF
ENVIRONMENT AND NATURAL RESOURCES
DIVISION OF MARINE FISHERIES
HABITAT PROTECTION SECTION
POST OFFICE BOX 769
MOR]EHEAD CITY, NC 28557
1-800-682-2632 OR 252-726-7021
PAX: 252-727-5127
To: S z'_ S "rt n 1q.
office-, 2)Ce2�� 4
Fag Number:
From: 6�fi6e p eZ` � f V)- CA(--S
Date: ✓(Cc�r�i�t Z)
Number of Pages Including Cover Sheet:.
Urgent FYI Per Your Instructions Please Reply Please Comment
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1'
State of North'Camlina
Npartment of Environment
and Hatural RAs aurcm
Division of Marine Rsheries
Michael F. Easley, Govemor
Willam G. Ross, jr., Secretary
PresW* n P. Pate, Jr., Director
NCDENR
Nofma CARaUm A CknUWMRW all
EWvtRONmg T AND N ftmmcas
1MMORANDUM:
TO: David A. GoodriA NC Division of Water Quality, NpDES Unit Supervisor
OUGH.: Mike S , - f, Habitat Pwtection Section
FROM: Sara E. Winslow, NC Division of Marine Fisheries, Northern District Manager
DATE: March 1., 2001
SUBJECT: Tyrrell County Reverse Osmosis Treatnient plant,
Draft NPDES permit # NCO086924
Thc. following comments by the North Carolina Division of Marine Fisheries (NCDW
ch the subject permit are offered pursuant to G.S.113-131. The NCDMI+ objects to the proposed
permit due to the toxic and habitat altering effects that the discharge will have on the biota of
Bull Bay and Albemarle Sound. NCDMF sample data indicate that Bull Bay is an important
nursery and adult foraging area for many commortially and recreationally important fishes (e.g.,
striped bass, white perch, yellow perch, catfish, alewife, bluebaok herring, American eel, blue
crab, spot, croaker, flounder, menhaden, sunfish (Loomis .) and largemouth bass).
This project will degrade the receiving waters, severely affecting existing uses. Such
degradation is a violation of the federal Clean Water Act, as well as applicable state laws, rules,
and policies. The NCDMp is extremely concerned that the discharge (108,000 GPD initially and
216,000 GPD at design capacity) would even be considered given that the Division of water
Quality (DWQ) "has concerns that the limits can be consistently met". The limits that may not
be consistently met were not identified in the permit. Therefore, design modifications should be
explored prior to permit issuance to assure: (1) that limits can be met at design capacity; and (2)
that the concems identified in this correspondence are considered based on design capacity
discharge. it appears therefore that sufficient information exists to support that the discharge as
presented should, not be allowed into this very low salinity estuarine (brackish water) system.
The potential toxicity to aquatic resources and habitat altering effects of ammonia, (NH4
a nutrient, in the discharge is a principle concern. The estimated discharge concentration of
ammonia (NH4) is 15.86 mg/l. The ammonita. nitrogen (NH3-N) of well -oxygenated waters its
relatively low (Wetzel 1975). Ammonia, while in its ionized form, NHL, is relatively nontoxic to
aquatic life. However, ammonia it its un-ionized form, NH3, is very toxic. As pH increases
above 6.0 ammonia as NH4 readily converts to N%. Ammonia (NH3) is acutely toxic to aquatic
organisms at 4.0 mg/l and may stress or cause death in some organisms at much lower levels. As
P.O. Box 769, Morehead City, North Carolina 28557-0769 Telephone [phone] FAX 2S2.726-0254
An Equal Opportunity Affirmative Action Employer SO% recycled/1096 post -consumer paper
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park of the natural nitrogen cycle, ammoma is oxidized and converted to nitrite (NO2). Nitrite can
be tonic to aquatic species, and the toxicity increases as pH falls below 7.5. $ven if the ammonia
and nitrite levels are not toxic or stressful, the discharggo will likely produce a net decrease in
w, *d ge oxygen M cm nlhed trough nitrification. Refted oxygen levels may
stress aquatic organisms or cause fish bills. AnvnOnia/nitrogen is readily utilized in the growth
processes of submerged aquatic vascular plants (SAV) and phytoplarddon (algae). The discharge
may contribute to increased growth of S" and algae in the bay. Algal blooms of some species
can be toxic to aquatic species, cause disruption of the aquatic food chain, and further reduce
oxygen levels.
Another concern is that the salinity of the discharge will be considerably higher than the
receiving waters. If our estimates are correct, the salinity of the discharge will be approximately
14,576 mg/i (ppm) or 14.6 ppt. ]aW water quality data (bottom sample 9-9 ft depth) from Bull
Bay (one mile north of the proposed discharge) show that salinity ranged from 0.3 - 6.0 ppt
during July - October of 1996 -1999. Salinity in this area is normally at its peak level during the
summer -fall season. Salinity. (ppt) ranges for each year were: 0.3 -1.9 in 1996;1.8 - 3.6 its 1997;
0.5 - 3.5 in 1998; and 0.4 - 6.0 in 1999. Due to the influence of fresh water inflows from Bunton
and Deep creeks, natural background salinity at the discharge location should be less than these
sample data levels.
Many of the aquatic organisms endemic to this area are Bible to tolerate wide fluctuations
in salinity, howevcr some species cannot, prey items of larval aid juvenile fishes could be '
destroyed by tho proposed discharge, and the eggs and larvae of some species would certainly be
affected. Also, the,high salinity discharge will very likely. disrupt th movement and migration
patterns of some fish species.
Another problem with the high salinity discharge is that salt water is heavier than fresh
water, and the discharge will likely produce or exacerbate (worsen) stratification of the water
column. A frequently occurring result of fresh water over salt water stratification is a condition
Imo'wn as "dead water". "Dead water" is water that is hypoxic (low oxygen) or anoxic (no
oxygen). Hypoxic and anoxic conditions result in stress (e.g., poor body condition, reduced
resistance to disease) or death to most aquatic organisms.
The problems with ammonia as previously discussed can be intensified by anoxic
stratification. Wetzcl (1975) noted that where appreciable amounts of organic mutter reach the
hypolimnion of stratified lakes, NH3-N tends to accumulate. The accumulation ofNli3-N greatly
accelerates under anoxio conditions, resulting in a marred release of NH4 from the sediments.
Bull Bay is an embayment of the Albemarle Sound and has at times significant to little or
no inflow. Based on our knowledge of agea waters, wind tides havo a significant offoet on water
levels and movement in Bull Bay. These wind tides may cause periods of stagnation (no flow or
little movement at times) and reverse flow in the discharge area; thus, significantly reducing
dilution and increasing impacts of the discharge on the aquatic ecosystem. Mixing in the
discharge area ofBull Bay is further restricted by an extensive 3-4 foot shoal that extends across
the bay, The onl deep Water (10-15 ft.) inletr'outlet is thtough a relatively small channel in the
shoal. The dilution factor in the receiving waters will greatlyinfluence the potential impacts of
the salinity and nutrient loading of the discharge. The salinity and nutrient concentrations of the
ditschasge compared to background levels are sufficient to cause any and all of the situations
described above. When combining the potential effects of salinity and nutrients, it appears they
may complement each other to enhance the cumulative negative impacts on the ecosystems.
P.O. Sox 769, Morehead City, Narth Carolina 28557-0769 Telephone Z5a-726-7021 FAX [phone]
An Equal 0wortunity Affirmative Action Employer 50% reayeladl10% post -Consumer paper
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The CDMF o the followxn recommendatio riot to finther action on this it:
iy Alu uuves to Ic prapose4 mscharge to Bull Bay should be fully evaluated (e.g.,
dischargo to a deep salt water aquifer, transporting the effluent to a more suitable discharge
point locatod, away from fresh waters).
2) The permittee should be requircd to do art Environmental Impact Study or Environmental
Assessment to evaluate the impacts of the discharge on water quality and biota in Bull Bay
and Albemarle Sound.
3) All evaluations and testing to assess the impaots of the discharge should be done based on
worst case scenarios for the receiving waters and effluent design capacity of the system.
If the discharge isD=mitted�over dur strong objections, the TQDW requests that tb►e�foi]oo
conditions be included in the effluent limitation , n ma-itorina require�aents.
1) Conduct a weekly biological assessment before and after the discharge begins to document
changes in water quality, fauna, and flora in Bull Bay, both upstream and dovurl$trearn of the
discharge for a period of at least four years.
2) The effluent should be stored and discharged when conditions are such that dilution is
maximized and impacts are mm iulized. This will require regular monitoring of the receiving
waters to determine opportune conditions.
3) Add acute toxicity testis& of the effluent prior to the initial discharge for aquatic species that
axe endemic to Bull Bay for various dilution rates siu d ar to those expected in the bay near the
discharge.
4) Add instream monitoring throughout the bay to include sampling at the surface and bottom of
the water column.
5) Add effluent amd instream monitoring for ammonia, nitrite, nitrate, and total nitrogM.
6) Add effluent ' and instream monitor for conductivity and salinity and the a mpon nts that
make up salinity (Le., Ca, Mg, Na, K, CO3, HCO3, SO4, and Q.
7) Add instream monitoring for temperature, dissolved oxygen, and pH.
8) Add• limits for settleable solids.
Literatwre Cited
Wetzel, R.G. 1975. Limnology. W.B. Saunders Company. 743 p.
P.0► Box 769, Morehead City, North Carolina 28557.0769 Telephone [phone] FAX [phone]
An Equal Opportunity Affirmative Action Employer 6094 racyclad/10% post-consurner paper
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Comments on Tyrrell WTP
Subject: Comments on Tyrrell WTP
Date: Fri, 02 Mar 2001 17:40:41 -0500
From: Lynn Henry <[e-mail]>
Organization: NC Division of Marine Fisheries
To: Susan A Wilson <[e-mail]>
Susan,
I sent the Tyrrell Co. RO WTP comments to Morehead for approval and they Faxed them this afternoon
(Friday). I was told they faxed 2 copies. The final copy is the one that has "dissolved oxygen" in Item # 7
on the last page. I omitted this on one of the copies.
Thank you in advance for your consideration of these comments.
Thanks for the additional info. on Stumpy Point, I guess it is too late to comment on that permit.
The ammonia level for the Tyrrell Co. raw water is 3.4 mg/l. I don't consider that as low. When U look up
the fed. doc. on ammonia let me know what U find.
LYNN
Lynn Henry <L,ynn.Henry@ncmai].net>
Marine Biologist
NC Division of Marine Fisheries
1 of 1 3/5/01 8:20 AM

NORTH CAROLINA
WASHINGTON COUNTY.
AFFIDAVIT OF PUBLICATION
Before the undersigned, a Notary Public of said County and
State, duly commissioned, qualified, and authorized by law
to administer oaths, personally appeared 9.\
_N�Q AmIr Ahnto .
who being first duly sworn, deposes and says: that he is pub-
lisher of The Roanoke Beacon engaged in the publication of
a newspaper known as The Roanoke Beacon, published, is-
sued, and entered as periodical mail in the Town of Plymouth,
in said County and State; that he is authorized to make this
affidavit and sworn statement; that the notice or other legal
advertisement, a true copy of which is attached hereto, was
puNshed in The Roanoke Beacon on the following dates:
1. Z-00
and that said newspaper in which such notice, paper, docu-
ment, or legal advertisement was published was, at the time
of each and every such publication, a newspaper meeting all
of the requirements and qualifications of Section 1-597 of
the General Statutes of North Carolina and was a qualified
newspaper within the meaning of Section 1-597 of the Gen-
eml Statutes of North Caolina.
This 1 8 }day of`1f1M.LLQLA A 20gLj_
Sworn to and subscribed before me, this -Lit-
day of L-�Il/Vl.0 OL" .20DA- t
try Public
Commission Expires June 2, 20H
= 1 ':
.,�,i, TON G(001'�
,rulntttttt
PUBLIC NOTICE
. STATE OF NORTH CAROLINA
ENVIRONMENTAL
MANAGEMENT COMMISSION/
NPDES UNIT
1617 MAIL SERVICE CENTER
RALEIGH, NC 27699-1617
NOTIFICATION OF INTENT TO
I§SUE A NPDES WASTEWATER
PERMIT
On the basis of,thorough staff
review. and application of NC Gen-
eral Statute 143.21, Public law 92500
and other lawful' standards and regu-
lations the North Carolina Environ-
mental Management Commission
proposes to issue a National Pollut-
ant Discharge Elimination System
(NPDES) wastewater discharge per-
mit to the person(s) listed below ef-
fective.45 days from the publish date
of this notice.
Written comments. regarding the
proposed permit will beaccepted
until 30'days after the publish date
of this notice. All, comments received
prior toithat date are considered in
the Trial determinations regarding the
proposed permit. The Director of the
NC Division of Water Quality may
decide to hold a public meeting for
the proposed permit should the Divi-
sion receive a significant degree of
public interest.
Copies of the draft permit and
other supporting information on file
used to determine conditions present
in thedraftpermit are available upon
request and payment of the costs of
reproduction. Mail comments and/or
requests for information to the NC
Division of Water Quality at the.
above address or call Ms. Christie
Jackson at(919) 7335083, extension
538. Please include the NPDES per-
mit.number (below) in any commu-
nicatiod. Interested persons may
also visit the DivisionofWater Qual-
ity at 512 N. Salisbury. Street, Ra-
leigh, NC 27604-1148 between the
hours of_8:00 a.m. and 5:00 p.m. to
review information on file. -
NPDES Permit',. ;Number
NC6086924, Tyrrell County/Tyrrell
County Reverse Osmosis Water
Treatment Plant, P.O. Box 449, Co-
lumbia, NC 27925 has applied for a
new "permit for a facility located in
Tyrrell County discharging treated
wastewater into Bull Bay y in the
Pasquotank River Basin. Currently
some metals parameters are, water.
quality limited. This discharge may'
affectfutureallocations in this per-
fion of the receiving stream.
'NPDES Permit Number
NCr0087A09, Washington County
(WTP), PO. Box 1007, Plymouth, NC
27962 has applied for a new permit
for -.a facitity, located in Washington
Countydischarging trebled -waste-
water into Kendrick�Creek in the
Pasquotank- River Basin. Currently
no parareters are water quality lim-
ited. This dscharge may affect future
allocations in this portion of the re-
ceiving stream. 01/17

TYRRELL COUNTY RO REJECT WW
NC0086924
AIVIMENDMENT TO THE FACT SHEET
The Division of Water Quality received significant comments from the Division of Marine
Fisheries (DMF) regarding the potential impact of the discharge into Bull Bay. The DMF
had requests for more extensive monitoring to determine the potential impact to the
ecosystem. Based on their concerns and comments, as well as the Division of Water
Quality's concerns that limits can be consistently met, the permit has been modified as
follows:
The predicted salinity of the discharge is a concern in this area. Predicted values
are higher than current values in the area due to the fresh water inflow from
Bunton and Deep Creeks into Bull Bay and may have an adverse effect on aquatic
life. Because the full extent of this type of discharge cannot be assessed, instream
monitoring for salinity at various areas in the Bay is recommended. Special
Condition A.4. has been inserted into the permit indicating the instream monitoring
locations and frequencies. Tyrrell County may request that the Division re-evaluate
the instream monitoring requirements after 2 years of data has been collected.
Another concern regarding the discharge is the elevated value of ammonia as
nitrogen in the deep well sample. This compound can adversely affect aquatic life
and deplete oxygen levels in Bull Bay. Monitoring for ammonia as nitrogen has
been included in the permit. Instream monitoring for dissolved oxygen, along with
temperature, will be included as part of the required monitoring in the special
condition discussed previously.
A settleable solids limit has been added to the permit. Should the county
demonstrate that there are not settleable solids in the effluent, after one year of data
has been collected, the county may request that monitoring for this parameter be
reduced or eliminated from the permit.
An additional comment submitted by the DMF pertained to a holding basin or
lagoon, sized to hold all effluent flow "until such times that dilution is maximized
and impacts are minimized." At this time, the Division is unsure of how long those
times would be and when they would be, so this condition has not been added to
the permit. However, the Division does have continued concerns that this
wastewater may not consistently meet the limits presented in the permit. Should
the limits not be consistently met, the DWQ may require that a holding lagoon or
other type of treatment be installed at the plant.
The DMF has requested that they be copied on, at minimum, all instream
monitoring data. Please forward copies of instream monitoring data in care of Sara
Winslow, DMF, at the address listed on the next page of this letter.
Aaf& I&, S6, V , kr O CN A" 2A59-P ON ApLATIZ UFC , fu-r CIWA J
kS V104 MA* VAIACe7-
Iz3 /10\

DENR/DWQ
FACT SHEET FOR NPDES PERMIT DEVELOPMENT
NPDES No. NC0086924, Tyrrell County RO Plant
Facility Information
Applicant/ FacilitName:
Tyrrell County/Tyrrell
Co. RO Plant Discharge WW
Applicant Address:
P.O. Box 449, Columbia, NC 27925
Facility Address:
Unknown at this time
Permitted Flow
Variable
Type of Waste:
Non domestic
Facility/Permit. Status:
New
County:
ell
Miscellaneous
Receiving Stream:
Bull Bay
Regional Office:
WaRO
Stream Classification:
SB
Quad
D33NE, Col West
303(d) Listed?:
No
Permit Writer:
S. Wilson
Subbasin:
030153/ Pas .
Date:
December 29, 2000-,
Drainage Area (mi2):
unknown
%
Summer 7Q10 (cfs)
0
Winter 7Q10 (cfs):
Average Flow (cfs):
IWC (%):
100
Primary SIC Code:
SUMMARY
Tyrrell County proposes to discharge reject water from its RO plant. The county will tap the
deep Castle Hayne aquifer. The proposed plant is to be built in phases of 300 gpm production
up to 600 gpm production. The reject water is proposed as 75 gpm up to 150 gpm (0.108 to
0.216 MGD) to be discharged to Bull Bay.
Data was collected from the Castle Hayne aquifer and a predictive model was used to determine
the potential parameters of concern and their concentrations.
Due to the elevated chloride levels, the engineer states that land application is not a feasible
option (plus, loading rates would be restrictive). Connection to a POTW is not feasible due to
the distance. Discharge appears to be the most economically feasible, environmentally sound
alternative as long as limits are are attained.
This RO facility proposes no treatment; most other existing ROs have no treatment. The
Division does have concerns about the ability to consistently achieve limits imposed in the
permit. Due to the limited discharge options and the need for potable water in the county,
discharge appears to be the only option at this time.
TOXICITY TESTING:
Based on the ultimate reject flow of 0.216 MGD and current policy for RO plants, Quarterly
Acute Limit, P/F at 90%, mysid 24 hour testing will be required.
INSTREAM MONITORING:
No instream monitoring will be required.
PROPOSED REQUIREMENTS:
Per the Division's current policy regarding RO discharges, for the wasteflow of 0.216 MGD,
monthly monitoring will be required for all parameters of concern.
PROPOSED SCHEDULE FOR PERMIT ISSUANCE:
Draft Permit to Public Notice: January 17, 2001 (est.)
Permit Scheduled to Issue: March 3, 2001 (est.)
Tyrrell Co. RO w,rP
NPWiS Renewal
Page I

STATE CONTACT:
If you have any questions on any of the above information or on the attached permit, please
contact Susan Wilson at [phone] ext. 510.
Tyn-el Co. Ro WT11
NPDES Renewal
Nee 2

Hobbs, Upchurch & Associates, P.A.
Consulting Engineers
NO 2522 S. Croatan Highway • Suite 2A • P.O. Drawer 1929 • Nags Head, North Carolina 27959
November 15, 2000
Susan A. Wilson
NCDENR
Division of Water Quality
NPDES Unit
1617 Mail Service Center
Raleigh, NC 27699-1617
RE: NPDES Permit Applications
Information Request/Reverse Osmosis
Tyrrell County RO Plant
NPDES Permit No. NC0086924
HUA No.: TY0001 — Permits
Dear Ms. Wilson:
Reference is made to your letter dated October 26, 2000 requesting additional
information for the above referenced project. The following information is provided in
reference to your comment letter regarding the Tyrrell County project.
Before addressing your specific comments, I wish to provide additional background
information. The original project was conceived in early 1999 and was proposed as a 300
gallon per minute pressure filtration and ion exchange softening plant utilizing waters
from the surficial aquifers. A Preliminary Engineering Report (PER) was written based
on this concept and grant applications were made for the newly passed Clean Water Bond
Funds and the N.C. Rural Economic Development Center. During the funding
application stages and as more and more data was collected in the region, it was the
primary concern of the County Commissioners to not install a conventional treatment
plant utilizing the surficial aquifers but instead to install a reverse osmosis water
treatment plant into the Castle Hayne aquifers. The reasoning was that the surficial
aquifers in the region are very limited in quantity and also tend to deteriorate over time in
quality primarily through upconing of chlorides from the lower aquifers. This is
presently being experienced at the County's existing plant just south of Columbia.
Reverse osmosis treatment technology is the only available technology to treat chlorides
and should be capable of meeting future regulations as they become more strenuous.
Nags Head, NC • Telephone [phone] • Fax [phone] • e-mail: info@ hobbsupchurch.com
Southern Pines • Myrtle Beach • Raleigh • Charlotte

Susan A. Wilson
HUA No.: TY0001 —Permits
November 15, 2000
Page 2
The discharge for the conventional treatment process included backwash water from the
pressure filters and a brine solution from backwash of the ion exchange softening vessels.
This discharge was to be into the Scuppernong River. The PER contained in the attached
Engineering Alternatives Analysis (EAA) indicates the location of the original discharge.
Before converting the project to a reverse osmosis treatment technology, discussions with
the Division of Water Quality indicated that the Scuppernong River would not be suitable
for a reverse osmosis discharge and that the Albemarle Sound should be utilized. This
change has been approved by the funding agencies and we have since proceeded with the
application for a discharge into the Albemarle Sound. Additional background
information can be seen in various attachments to the EAA.
In addition to the change from conventional treatment to reverse osmosis treatment, the
Commissioners have asked us to size the plant to allow for future expansion. The first
phase of the plant is to be 300 gallons per minute as is documented in the NPDES permit
application. It is the desire of the Commissioners to allow for a future phase of the plant
for a total of 600 gallons per minute. This will allow the County to supplement the
existing water plant with water. The existing water plant is approximately 30 years old
and the wells are experiencing reduced flows and reduced water quality due to upconing
of chlorides. Secondly, a test well has now been dug at the actual treatment plant site and
samples. taken from the aquifers to be utilized for the project. The results indicated that
the plant could be designed for an 80% recovery instead of the 75% recovery in the
original NPDES application. This means that an additional 5% of the water can be used
as potable water and the discharge amount is reduced by 5%. For example, the original
concept of 75% would result in wells that produce 400 gallons per minute with 300
gallons per minute as potable water and 100 gallons per minute as concentrate discharge.
At 80% recovery, the project will now utilize 375 gallons per minute wells with 300
gallons per minute of potable water and 75 gallons per minute of discharge water. In the
future when the plant is expanded, the discharge will increase from 75 gallons per minute
to 150 gallons per minute.
The result of the above discussion is that the NPDES permit needs to be changed from
100 gallons per minute discharge to a 75 gallon per minute discharge with a future
expansion to 150 gallons per minute discharge. Please let us know how we can handle
this change and what information or changes we need to make to the discharge permit
application.
\WIIAR MMjM%TYRRELL COUNTYMYOWI Water System ImprovemenbUW PERMITSM0 PERMIT APPLICATION -SUBMITTAL INFORMATIONW.C.
DEPARTMENT OF ENVIRONMENT AND NATURAL RESOURCES\WATER QUALFFYtNPDES PERMITIEAMW I SONA.,

Susan A. Wilson
HUA No.: TY0001 — Permits
November 15, 2000
Page 3
1. Item number 1 of your comment letter requests an Engineering Alternatives
Analysis Report. Please find this report attached as requested.
2. As previously discussed, an actual test well has now been performed at the
proposed water treatment plant site. The test well was constructed in early
October 2000, samples were collected on October 4, 2000, and the analysis was
received on October 25, 2000. The test well determined there were two water
bearings stratas in the area and are located at depths of 100-150 feet for the first
bearing strata and a depth of 405-480 feet for the second bearing strata. We
believe these stratas to be the Yorktown aquifer and the Castle Hayne aquifer
respectively. Attached for your use is the laboratory analysis of the constituents
from each aquifer. We propose to utilize the deep well strata or the Castle
Hayne for our reverse osmosis project. This aquifer had better yields and
should meet the future quantity needs of the project. Based on the deep aquifer,
a computerized reverse osmosis design program was utilized to project the
concentrate discharge for the project. Also attached for your use is a copy of
the program that illustrates the quality of the discharge. The results can be seen
on the second page listed under concentrate. The concentration of metals listed
in the raw water analysis can be converted to the discharge parameters by
multiplying by a factor of 5. For example, if copper and zinc were 0.005
milligrams/liter in the raw water, the discharge would be 0.025 milligrams per
liter. However, both copper and zinc were below detectable hints.
3. Item number 3 does not specifically apply to Tyrrell County; however, it is
pointed out that according to the computerized model, the pH of the discharge
will be 7.88.
4. The sounds in northeastern North Carolina are naturally shallow. At the point
of discharge, the depth ranges between 3-4 feet and fluctuates with the wind
tides. From our experience with the same discharge header at the Cape Hatteras
water treatment facility, the discharge header arrangement proposed creates
very little disturbance at the surface even in two feet of water. At the low flows
we are proposing at this water treatment facility, no disturbance would be seen
in two feet of water or greater. The arrangement of the discharge head also is
such to create no scouring to the sound floor.

Susan A. Wilson
HUA No.: TY0001 —Permits
November 15, 2000
Page 4
Please note that the drawings for the discharge contained in the EAA have been
revised to indicate a depth of three feet rather two feet based on actual field
measurements. To reach a depth of six feet of water, the pipeline would have to
be extended 1,600 feet. It is our experience and opinion that this discharge
header in three feet of water would provide adequate dispersion and dissolution
as well as minimize any surface turbulence and sound bottom scouring.
If you have any questions or if additional information is needed, please do not hesitate to
call.
Sincerely,
HOBBS, UPCHURCH & ASSOCIATES, P.A.
Eric T. Weatherly, P.E.
Division Manager
ETW/hb
Attachments
Cc: J.D. Brickhouse, Tyrrell County Administrator
\UR/A Mpmj"\TYRRELL COUNTY\TY0001 Water System Imp.v...nUWPERMITSV20 PERMIT APPLICATION -SUBMITTAL WFORMATIONW.C.
DEPARTMENT OF ENVIRONMENT AND NATURAL RESOURCEMWATER QUALITYWPDES PERMMEAA\WILSON.d.

Oct725-00 03:03P Envlrochiam 910 392 4424 P.Ol
Environmental Chemists, Inc.
6602 Windmill Way - Wilminyron, Ncnh C"niina 28405
(510) 392-0.23 (Lab) • (910) 392- 24 (F. )
CONSULTING Flhem W <etoLenm
CHFMISTS NCDENR: D WQ CERTIFICATE #94, DLS CERTIFICATE #37729
Customer:
SKIPPER'S WELL DRILLING Date of Report: October 25, 2000
P.O. Box 250 RESULTS TO DATE
Leland, N.C. 29480 Purchase Order No.:
Atta: Charlie Skipper
Report Number: 0-3495
REPORT OF ANALYSIS
Date Collected: 10/04/00 Report To: Charlie Skipper
Sampled By; Client Project: Tyrell County Weus
WATER • ` ' Page I or 2
S . pie ED Deep Well Shallow Well
# 8366 N 9367
P-Alkalinity as CiiCO.�, ntg/I,
< 0.5
< 0.5
Total ABulinity as CeC% mg/L
434
311
Carbonate, as CO: tng/L
0
0
EFix 1c as OH mg/L%45W22
0
Total Hardaeas as CaCO, mg/283
Calcium Hardness as CaCO' m235
Magnesium as Cat mg/L
48
Caldnat, Ca mg/L94.0
Color, C.U. (Color Units)12
Silica as Si:0. >�,23.3
Conductivity as pnikos/cm709
Iron. Fe mg/L
0.030
1.28
PotAssium, K ntg/L
75-3
9.69
Copper, Cu mg/L
< 0.005
< 0.005
Manganese, Mn mg/L
.. < 0.005,
0.076
Phosph ste, POa MWL
< 0.02
0.13
Chloride, Cl- mY/-
1375
52.9
Fluoride, F" mW./L
0.86
0.22
10/25/00 16:32 TX/RX N0.9101 P.002

Oct-25-00 03:03P Envirochem
910 392 4424 P-02
Environmental Chemists, hie.
6602 Windmill Way • Wilminewa, NOM't CJm"w U405
=I
k [phone] (Lab) • [phone] (F; I
F.chem W �eo3.�m
CONSULYING
CHEWST9 NCDENR: DWQ CERTIFICATE a94, DLs CERTIFICATE *37729
Customer: Skipper's Well OrMiog Report 0-3495 Page 2 of 2
WAIEH:
Sample ID
Deep wen
S 8366
shallow wen
N 8367
Nitrate Nitrogen, NO.r•N mg/L
0.045
0.075
Zinc, Za mg/L
< 0.005
< 0,005
Chlorine (Free C1z) mg/L
< 0.1
< 0.1
Ammonia as N14 mg[L
3.4
0.6
$cerium, Ba_:zng/L
0.030
0.025
Hydrogen Sulfide as H2S
0.04
< 0.01
Temperature as' C
16.7
16.7
Lead as Pb mg/L
0.019
0.014.. -
Corrosiveness
+ 0.72
+ 0.33
PH, units
plus, units
8.11
7.39
7.73
7,44
Turbidity as N.T.U.
Total Suspended Solids, TSS snglL
Total DisMved Solids, TDS mg/L
1.75
2674
5.80
455
$PUAte a9 504 mg/L
63
< 2
Sodium as Na mg/L
828
40.4
Sa de as S mg/L
0.4
< 0.01
Total Organic Carbon as TOC mg/L
TMW FP
3.5 6.4
THM POTENTIAL at pH =
Chlorine residual after incubation =
Chloroform 1gIL
Bromoform µg/L
CMorodibromomethane y4fL
Bromodichloromethane µgfL
TFP µg/L (as Chloroform) —
TFP µMolea/L = TFP ttr/L as Chloroform
119
10/25/00 16:32 TX/RX N0.9101 P.003

1-941-468-9400
Fluid Systems Corporation
Project: Tyrrell County, NC
Prepared By: Jon
PROJACT SubodARY
f--
941 P02 NOV 08 '00 16:09
ROPRO Ver. 6.1-CP _ Date: 08-Nov-2000
Description: w/o blend, 80% sac.
Type: Single Pass Design
PROCxSS XLOw DMA►JMRAK
Ro Recovery 113/41 - 80.06
Design Temperature + 16.7 Deg C
PASS 1
Array Racovery 113/4] - - 80.08
aleuent Age - 0.00 Years
8ouli.ng Allowance (PA) - 0.00
DI S CH AP.GC
Fluid
Overall 8ystan Roo I17/(4+15)1 w SO.Ot
Tubes ale"
Avg
Hank glement Type
/Hank /Tube
Flux
MID)
1 TM 8822HR-365
8 7
15.0
2 Tsrc 882113LP-365
4 7
12.3
System/rasa Total
14.1
Pressure Flow Rate
TDS 180C
Hardnman
Chloride
with FA
Stream (Paig)
(DSGIS"
(ag/L)
(C&CO3)
(mg/L)
1 0.0
375.0
2745.73
411.2
1375.0
4 0.0
373.0
2745.73
411.2
1375.0
5 215.3
375.0
2763.28
411.1
1373.0
13 0.0
300.0
69.76
2.1
30.5
14 0.0
300.0
69.76
2.1
30.5
16 0.0
7 O a
300.0
300 0
69.76
2.1
30.5
�18 183.3
75.0
13547.49
2046.9
6752.9
()ISCNA\2GE
11/08/00 16:08 TX/RX NO.9244 P.002

1-941-488-9400
Fluid Systems Corporation
Project: Tyrrell County, NC
Prepared By: jen
ARRAY SUMMARY - PASS I
Permeate Flow
Pass Recovery
Inlet Prey w/o FA
Inlet Pros w/rA
Bank Sloment Type
I TrC 8822HR-365
2 TrC 8821DLF-365
941 P03 NOV 08 '00 16:09
ROPRA ver. 6.1-CR Dnto: 00 Nov--2000
Description: w/o bland, 80% rec.
Type: Single Pass Design
300.0 DSGPM Tamp (Design/Avg)
90.0% Fouling Allowance
215.3 Paig Cono. Pras w/o FA
215.3 Psig
Tubs& 8lesss Blems Slem Boost
/Bank /Tube /Bank Age Pressure
() (*) (9) (Yr) (Psig)
8 7 56 0.00 0.0
4 7 28 0.00 0.0
16-7/ 16.7 Deg C
(FA) 0.06
183.3 Psig
Manifold Perm Back
Loaa Pressure
(Paig) (Paig)
0.0 0.0
0.0 0.0
Total
Tube
Total
Tube
Avg inlet
Avg
Bank rinal
Bank Feed
reed
Conn.
Conn. Flux Prey
Nor
DP Clssroent
(GPM)
(GvW
(GM
(GM (GVD) (Paig)
(Paig)
(Psig) Bsta
1 379.0
46.9
162.7
20.3 15.0 215.3
157.9
17.6 1.097
2 162.7
40.7
75.2
18.8 12.3 197.E
83.2
14.3 1.057
System
14.1 D1SLH RG.L
Not reed
RO Inlet
-
Permeate
a BtrsaNus`bes
�a.�•,
13
Concentration
(mq/L)
(mq/L)
(alg/L)
(mg/L)
Ca++
55.30
35.30
275.35
0.29
Mg++
66.29
66.29
330.00
0.34
Na+
828.00
828.00
4041.68
24.58
R+
75.30
75.30
364-90
2.88
NH4+
3.40
3-40
15.86
0.29
Sr++
0.00
0.00
0.00
0.00
Ba++
0.03
0.03
0.15
0.00
Fe++
0.03
0.03
0.15
0.00
NM++
0.00
0.00
0.00
0.00
CO3--
0.00
0.56
2.00
0.00
HCO3_
529.09
464.43
2241.51
20.24
B04--
63.00
113.74
566.97
0.44
Cl-
1375.00
1375.00
6752.89
30.53
NO3-
0.05
0.05
0.23
0.01
r-
0.86
0.86
4-26
0.01
S102
18.60
18.60
91.13
0.47
CO2
7.75
54.01
54.01
53.95
Sum of Tana
3014.95
3001.39
14688.04
00.06
TD9 (180 C)
2745.73
2765.26
13547.49
69.76
pH
6.10
7.20
7.88
j 5.84
Hardness (as
C&CO3)
411.09
411-09
2046.92
2.13
Osm Prassurs
(Pai(j)
29.01
26.77
140.78
0.77
Langlier Index
0.83
-0.13
1.95
-5.29
Stiff -Davis Index
0.83
-0.13
1.27
---
Mambrane data file version: Jun-12-00
Please review the Design Notes & warnings Page attached -
Concentrate exoeada solubility limit - 800 warnings sheat-
11/08/00 16:08 TX/RX NO.9244 P.003

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1

State of North Carolina
Department of Environment
and Natural Resources
Division of Water Quality
James B. Hunt, Jr., Governor
Bill Holman, Secretary
Kerr T. Stevens, Director
Mr. Eric Weatherly
Hobbs, Upchurch & Associates,
2009 S. Croatan Highway
Kill Devil Hills, North Carolina
Dear Mr. Weatherly:
I X:1111
27948
NCDENR
NORTH CAROLINA DEPARTMENT OF
ENVIRONMENT AND NATURAL RESOURCES
October 26, 2000
Subject: NPDES Permit Applications
Information Request/ Reverse Osmosis
Dare County/ Stumpy Point RO Plant
NPDES Permit No. NCO086932
Tyrrell County RO Plant
NPDES Permit No. NCO086924
Letters of reghest for an NPDES permit, along with supporting information and fees, for both
the Dare County/ Stumpy Point and Tyrrell County Reverse Osmosis plants were received June 6,
2000. As these two projects are somewhat similar in scope, the comments below shall apply to both,
unless otherwise stated.
The following items will need to be resolved prior to drafting an NPDES permit for reject water
from the proposed reverse osmosis plants:
1.) Speculative limits were submitted to you May 3, 1999 for several reverse osmosis facilities,
which included both Dare County/ Stumpy Point and Tyrrell County. The Division is aware
that circumstances since that time have changed and the descriptions and speculative limits
given may not be applicable. However, in paragraph 3 of that letter, you were notified that any
permit package should include a summary of alternatives to surface water discharges. Review
of both application packages and supporting information did not reveal that alternatives were
addressed (with the exception of a brief paragraph in the cover letter discussing alternatives to
reverse osmosis water treatment). The Division understands that options in this area may be
limited, however, they must be addressed [ref. 15A NCAC 2H .0105(c)(2), a copy of the
Engineering Alternatives Analysis is attached with this letter]
2.) More information is needed regarding the projected concentrate water discharge at both
plants. Please provide information as to how the projected concentrates were determined.
Also, provide when and at what depth the samples were taken to predict the reject water
concentrates. The total analysis list should be provided; if values that are in the influent
1617 Mail Service Center, Raleigh, North Carolina 27699-1617 919 733.5083, extension 510 (fax) 919 733-0719
An Equal Opportunity Affirmative Action Employer Susan.A.Wilson®ncmail.net

Mr. Eric Weatherly
Page 2 of 2
2.) Continued
water are projected to be zero (or below a minimum detection level) in the reject water, they
should be so noted. For example, were copper and zinc projected to be <2 ug/l in the reject
water from the Tyrrell County plant and so were not listed or were they not tested for? Unless
information can be provided regarding all metal parameters, the permittee will likely be
subject to limitations on those metals until additional data is collected. For Dare County,
what is the projected concentration of the water from the iron filter backwash?
3.) The Division does have concerns with the projected reject water concentrations for copper and
zinc at the Dare County RO plant. Specifically, the project concentrations are listed as 2600
ug/1 for copper and 80 ug/1 for zinc. The county should be aware that North Carolina's action
level water quality standards for copper and zinc are 3 ug/l and 86 ug/l, respectively. Unless
these concentrations are reduced in some manner, these elevated concentrations may effect
toxicity testing results which would be implemented in the permit. Additionally, North
Carolina's water quality standard for pH into saltwater bodies is 6.8 - 8.5 SU. The projected
pH value is 8.5 - 9.0 for the Dare county plant; instances of non-compliance may result from
this discharge, if not treated in some manner.
4.) The Division recommends that the diffuser be placed at a depth where the discharge would not
cause surface turbulence (the current proposal indicates a depth of 2 feet). Please consult
further with the Division's Washington Regional Office regarding potential location of the
discharge line and placement of the diffuser. Traditionally, the region has recommended a
minimum depth of 6 feet for discharges from diffusers into similar type waterbodies.
You may wish to discuss this further with Alton Hodge, Washington Regional Office, (252) 946-
6481 or me at [phone], ext. 510.
Sincerely,
son
NPDES Unit
cc: Al Hodge, Washington Regional Office/ Water Quality
J.D. Brickhouse, County Administrator
Robert Oreskovich, Director
Sid Harrell, DEH/ Parker Lincoln
NPDES Files
Tyrrell County
P.O. Box 449
Columbia, NC 27925
Dare County Water Department
600 Mustian Street
Kill Devil Hills. NC 27948

Hobbs, Upchurch & Associates, PA.
Consulting Engineers
IqJ2522 S. Croatan Highway • Suite 2A • PA. Drawer 1929 • Nags Head, North Carolina 27959
August 17, 2000
David A. Goodrich
NCDENR — Division of Water Quality
NPDES Unit
1617 Mail Service Center
Raleigh, NC 27699-1617
RE: NPDES Permit Application NCO086924
Tyrrell County Reverse Osmosis WTP
Tyrrell County
HUA No.: TY0001 —Permits
Dear Mr. Goodrich:
D_�� is
-�Fili,I
�l AUG 2 1 2000
L_
n —R- :, J
v:,ar
Please find attached a letter from Robin Peele of the Public Water Supply Section, State
Revolving Fund Branch, regarding the discharge permit for the above referenced project. The
State Revolving Fund Branch has stipulated a deadline of March 14, 2001 to receive the NPDES
permit or grant funds will be withdrawn. Please contact me if there is any further information
that your staff needs in the evaluation of the discharge application.
Your assistance in this matter is greatly appreciated.
Sincerely,
HOBBS, UP'CHUURCH & ASSOCIATES, P.A.
Eric T. Weatherly, P.E.
Division Manager
ETW/hb
Attachment
Cc: J.D. Brickhouse, Tyrrell County Administrator
Al Hodge, Division of Water Quality, Washington Regional Office
Susan Wilson, NPDES Unit
IWLAKDFPpuje.1TYRREU_ COMMMI Warn STnem Imppo mei 130OPF&VffMJ10PER.WTAPPLIC4nO.VZMtff7IALI.VFORW4TIONIKC. DF ARMEVT OF
6\ITR0.VWNTA.VD NATURAL RFSO(WC WATM QUAUMVPDF PFRWDGOODRICN.4.b
Nags Head, NC • Telephone [phone] • Fax [phone] • e-mail: [e-mail]
Southern Pines • Myrtle Beach • Raleiah • Charlotte

10 t~t.k. I YJ
At vo
NCDENR.
w-.'
JAMES B. HUNT JR." ""T
GOVERNOR
-�
Kra
BILL HOLMAN
SECRETARY
LINDA C SEWALL`7 {
DIRECTOR
-
JESSIGA•G. MILES~'
CHIEF
NORTH CAROLINA DEPARTMENT OF
ENVIRONMENT AND NATURAL RESOURCES
DIVISION OF ENVIRONMENTAL HEALTH
PUBLIC WATER SUPPLY SECTION
July 31, 2000
The Honorable Thomas W. Spruill
Chairman of Board Commissioners
Tyrrell County
Post Office Box 449
Columbia, North Carolina 27425
� � n �•i
A
AU
J
• .f
Re: Water Supply
Loan and Grant Program
Project Number DEH-0710
Tyrrell County
Dear Chairman Spruill:
Your July 7, 2000 provisional plans and specifications approval allowed this project
to retain its grant award. However, in accordance with G.S.159 G 8(b), G-9(3) and G-11
and 15A NCAC 1 J .0303(c) and .0901(f), if you have not been issued the necessary
National Pollutant Discharge Elimination System permit by March 14, 2001, your grant
award will be withdrawn for this round. However, this will not hinder any future consideration
for funding.
If you need additional information, please contact me at [phone] or Sid Harrell
at 919 715-3216
Sincerely,
�11 /-'O� � 2. 1 4
Robin D. Peele
State Revolving Fund Branch
RDP:kam
cc: Michael Bell, P. E., Regional Engineer
Eric Weatherly•P. E.
Project file -
)M AM6RlGA
2 0 1 0
1634 MAIL SERVICE CENTER, RALEIGH. NORTH CAROLINA 27699-1634
PHONE [phone]
MAIN FAX [phone] LAB FORMS FAX[phone]
AN EQUAL OPPORTUNITY / AFFIRMATIVE ACTION EMPLOYCR • 50%i RECYCLED/10% POST-CONSUMCR PAPER

State of North Carolina
Department of Environment
and Natural Resources
Division of Water Quality
James B. Hunt, Jr., Governor
Bill Holman, Secretary
Kerr T. Stevens, Director
June 12, 2000
Mr. J. D. Brickhouse
Tyrrell County Administrator
P.O. Box 449
Columbia, North Carolina 27925
AF
NCDENR
NORTH CAROLINA DEPARTMENT OF
ENVIRONMENT AND NATURAL RESOURCE5
Subject: NPDES Permit application NCO086924
Tyrrell County Reverse Osmosis WTP
Tyrrell County
Dear Mr. Brickhouse:
The Division received your permit application and fee of $715.00 (paid by check # 1090) on June 7,
2000. Thank you for submitting this package.
Ms. Susan Wilson of the NPDES Unit staff will review your application. Ms. Wilson will contact you if
further information is needed to complete the permit. Please note that the NPDES Unit has consistently had at
least 3 (and as many as 5) vacant positions since October 1998. Our remaining permit writers are currently
carrying extremely heavy workloads. While we do not expect severe delays in handling your request, be aware
that your request is one among many that our remaining staff must review.
The construction plans submitted with the application have been returned to your Authorized
Representative (Eric Weatherly of Hobbs, Upchurch & Associates). Plans and specifications for an
Authorization to Construct cannot be reviewed prior to the approval of the permit application. If technical
questions arise during the review of the application, we will handle them with your Authorized Representative.
If you have any additional questions concerning the subject application, please contact Ms. Wilson at
[phone], extension 510.
Sincerely,
Charles H. Weaver, Jr.
NPDES Unit
'. ! cc:
�` Central Files
kW, . •lam Regional Office, Water Quality Section
NPDES File if
Eric Weatherly / Hobbs, Upchurch & Associates
1617 Mail Service Center, Raleigh, North Carolina 27699-1617 919 733-5083, extension 511 (fax) 919 733.0719
VISIT US ON THE INTERNE @ h9p:#h2o.enr.state.nc.us/NPDES Chades.Weaver®ncroail.net

v 3 2000
i
PY Daive Goodrich, Supervisor NPDES Permitting Unit
Thru: Roger K. Thorpel, P.E., Permitting Group Leader, WARO
Attn: Mi mpleton, Environmental Engineer
From: AI Hodge, Environmental Engineer, WAROX— -L—
Date: June 20, 2000
Re: Reverse Osmosis Discharge, Tyrrell & Dare County
Memorandum
June 20, 2000
Please find attached a copy of a letter from Mr. Eric T. Weatherly, P.E. of
Hobbs, Upchurch & Associates, regarding the funding and the NPDES permitting of
two proposed water treatment plants. One of the proposed plants is in Tyrrell and the
other in Dare County. Mr. Weatherly indicates that in order for Tyrrell County and
the Stumpy Point Water and Sewer District (SPW&SD) to receive a Clean Water
Bond grant a permit to construct from the Public Water Supply Section (PWSS)
must be issued. In order for PWSS to issue a permit to construct a water treatment
plant a method of disposal of any reject or backwash water is required. In this case,
an NPDES permit would be required. W. Weatherly acknowledges that it is
impossible to process the NPDES permit application by the PWSS deadline (July 7,
2000). Mr. Weatherly has contacted Mr. Tony Chen of the Public Water Supply
Section, which has agreed that a letter from the DWQ will be adequate for PWSS to
issue a construction permit. The letter should indicate that "it is possible" for an
NPDES permit to be issued in the aforementioned cases.
I am familiar with both the Tyrrell County and Stumpy Point sites. I believe
that it is not only possible, but also likely that an RO reject water discharge from the
water treatment plants can be permitted. The Tyrrell County site would discharge
directly to Bulls Bay in the Albemarle Sound and the SPW&SD would discharge in
to Stumpy Point Bay in the Pamlico Sound.
It is recommended a letter addressing the possibility of issuing an NPDES
permit for both theses sites be sent to Mr. Weatherly.

Hobbs, Upchurch & Associates, P.A.
Consulting Engineers
H:J 2522 S. Croatan Highway • Suite 2A • P.O. Drawer 1929 • Nags Head, North Carolina 27959
May 24, 2000
David A. Goodrich
NCDENR
Division of Water Quality/NPDES Unit
1617 Mail Service Center
Raleigh, NC 27699-1617
RE: RO WTP Concentrate Discharges
Tyrrell County and Dare County
HUA No.: TY0001 —Permits
DR0004 — Permits
Dear Mr. Goodrich:
u�J i JUN 5 2000 J i
L"ASHIN REGIUNAL GFFiCE
Dw0
Tyrrell County and the Stumpy Point Water and Sewer District (Dare County) are
proposing to construct reverse osmosis water treatment facilities. On March 10, 2000,
both counties received grants from Clean Water Bond — DENR High Unit Cost Grant
Funds to construct their project. A stipulation of the grant is to receive the Public Water
Supply Section (PWSS) permit by July 7, 2000. Per a conversation with Mr. Tony Chen
of the PWSS, an NPDES permit will be required to receive a PWSS permit.
On May 15, 2000, the NPDES permit applications for both projects were submitted to the
NPDES Unit. On May 24, 2000, plans and specifications for both projects were
submitted to the NPDES Unit. Everyone understands that this does not allow the time
required to issue an NPDES permit. Mr. Tony Chen has agreed *eat a iener received
from your Unit by July 7, 2000 indicatin rtj.sy oss h1e _to receive the_I rmit will
be sufficient for the PWSS permit. This will allow the necessary time to hold public
hearings and/or address comments, etc.
Mr. Al Hodge of the Division of Water Quality, Washington Regional Office, is also
familiar with the projects and has visited the sites. Mr. Hodge pointed out that the
proposed projects are similar to previous projects with which he has been involved.
Nags Head, NC • Telephone [phone] • Fax [phone] • e-mail: [e-mail]
Southern Pines • Myrtle Beach • Raleigh • Charlotte

David A. Goodrich
HUA Nos.: TY0001 and DR0004
May 24, 2000 .
Page 2
The following is a brief outline of the projects:
TYRRELL COUNTY
A grant was received in the amount of $1,874,375 from Clean Water Bond funds for the
construction of a 300 gallon per minute reverse osmosis water treatment facility, a
300,000 gallon ground storage tank, two groundwater wells, 8-inch water transmission
main and discharge.
Water will be supplied by two wells drilled 'into the Castle Hayne aquifer. Although
there is an ample supply of water in this aquifer, the chlorides are at a level which will
require membrane treatment.
The -reverse osmosis concentrate discharge will be approximately 144,000 gallons per day
f. (100 gallons per minute) at full capacity. T.he-proposed-discharge will be into Bull Bay
off -the Albemarle Sound. The discharge will consist of a 4-inch directionally bored pipe
from the shore into Bull Bay. We propose to locate the discharge approximately 100 feet
from the shoreline. A discharge header will be installed at the end of the pipe on the
bottom of the bay.
STUMPY POINT WATER AND SEWER DISTRICT (Dare County)
A grant was received in the amount of $1,901,845 from Clean Water Bond funds for
construction of a 50 gallon per minute reverse osmosis water treatment facility, 75,000
gallon elevated storage tank, two groundwater wells, 8-inch water mains and discharge to
serve the Stumpy Point Community.
Water will be supplied by two wells drilled into the Yorktown aquifer. Although there is
an ample supply of water in this .aquifer, the chlorides are at a level, which will require
membrane treatment. The reverse osmosis concentrate discharge from the facility will be
approximately 38,880 (27 gallons per minute) gallons per day and a filter for iron
removal will have a backwash discharge of approximately 4,320 gallons per day at full
capacity_
We propose to locate the discharge in the Stumpy Point Bay near the intersection of N.C.
Highway 264 and Stumpy Point Road. The discharge will consist of a 4-inch
directionally bored pipe from the shore in the Stumpy Point Bay. The proposed

David A. Goodrich
HUA Nos.: TY0001 and DR0004
May 24, 2000
Page 3
discharge will be approximately 100 feet from the shoreline. A discharge header will be
installed at the end of the pipe on the bottom of the bay.
It is our opinion that any specific issues of these projects can be addressed given
sufficient time. However, the funding requirements are unique in that a short time frame
has been allowed by the grantors to receive an NPDES permit. Therefore, it is requested
that after your review of these projects and working through any major issues, letters be
written to the PWSS indicating that receipt of NPDES permits is possible.
The water treatment facilities for Tyrrell County and Stumpy Point are. needed and will
not occur without the grant funds. Your assistance in meeting the grant requirements will
be greatly appreciated. If you have any questions or if additional information is needed,
please do not hesitate to contact me.
Sincerely,
HOBBS, UPCHURCH & ASSOCIATES, P.A.
1
Eric T. Weatherly., P.E.
Division Manager
ETW/hb
Cc: Tommy Stevens, Director, Division of Water Quality
Coleen Sullins, Chief, Water Quality Section
Tony Chen, Public Water. Supply Section
Al Hodge, Division of Water -Quality .
Robin Peele, Public Water Supply Section
J.D. Brickhouse, Tyrrell County Administrator
Bob Oreskovich, Director, Dare County Water Department
Fred Hobbs, HUA
IWUAKDHiproJecosW.4RECOUN7MR0004 Scrimpy Point hater ct Sewrr District Commxtiip, Water s►stemi300 PERT 1OMGOODNCX.3.doc

Thomas W. Spruill, Chairman
Florence E. Bryant, Vice Chairperson
Mina B. Griswell
Tyrrell County Board of Commissioners
P. O. Box 449
Columbia, North Carolina 27925
Telephone [phone]
June 2, 2000
Charles H. Weaver, Jr.
NCDENR/Division of Water Quality
NPDES Unit
1617 Mail Service Center
Raleigh, NC 27699-1617
RE: NPDES Permit Application
Tyrrell County Reverse Osmosis WTP
Tyrrell County
Return # 2075
Dear Mr. Weaver:
486 9z9
�i0 9D
57f o0
Durwood M. Cooper, Jr.
Zacharias (Zack) Brickhouse
Connie Hopkins, Clerk
Tyrrell County wishes to designate Hobbs, Upchurch & Associates, P.A.
as the Authorized Representative for the above referenced project.
Please let me know if further information is needed.
Sincerel ,
9"24-r-
. D. Brickhouse
County Administrator
Cc: Eric Weatherly, Hobbs, Upchurch, & Associates, P.A.

1111 Hobbs, Upchurch & Associates, P.A.
Consulting Engineers
r%J 2522 S. Croatan Highway • Suite 2A • P.O. Drawer 1929 • Nags Head, North Carolina 27959
June 5, 2000
Charles H. Weaver, Jr.
NCDENR/Division of Water Quality
NPDES Unit
1617 Mail Service Center
Raleigh, NC 27699-1617
RE: NPDES Permit Application
Tyrrell County Reverse Osmosis WTP
Tyrrell County
Return # 2075
HUA No.: TY0001—Permits
Dear Mr. Weaver:
As per your comment letter dated May 30, 2000, the following is enclosed regarding the
above referenced project:
Letter from Tyrrell County designating Hobbs, Upchurch & Associates, P.A. as
the Authorized Representative for this project
. Check # 1090 in the amount of $715.00
. The original submittal package (3 sets of plans and specifications)
. The original NPDES Permit application
Please contact me if further information is needed.
Sincerely,
HOBBS, UPCHURCH & ASSOCIATES, P.A.
Eric T. Weatherly, P.E.
Division Manager
Cc: J.D. Brickhouse, Tyrrell County Administrator
IWUAKDHiypmj,aA7YRP.UL COUNMTrWO1 Wme,Synem PFJ"TS320 PFAWAPPL1C4770NSURMML 1 FOR 770HWPDFS
PFAWnW"VFAd.c
Nags Head, NC • Telephone [phone] • Fax [phone] • e-mail: info@ hobbsupchurch.com
Southern Pines • Myrtle Beach • Raleigh • Charlotte

NC0086924 (Tyrrell County) & NCO086932 (Dare County / Stumpy Point) R.O. plants
Subject: NCO086924 (Tyrrell County& NCO086932 (Daze County / Stumpy Point) R.O. plants
Date: Tue, 13 Jun 2000 14:15:14 -0400
From: Charles Weaver <[e-mail]>
To: Susan A Wilson <[e-mail]>, Dave Goodrich <[e-mail]>
CC: Bill Reid <[e-mail]>
Susan, I put these two new applications in your box. They're both from Hobbs, Upchurch & Associates (HUA).
Mark provided spec limits for both plants earlier, however, the applications don't match the specs he provided to HUA.
• The Tyrrell County application is for an R.O. plant, at a different location (further downstream, apparently) from the spec
request. The spec request was for a conventional WTP. The specs Mark prepared are probably no help for this application.
• The Dare County application is for a plant with much higher reject flow than the specs allow. As the Dare County site
discharges to an SA water, I don't know if the specs Mark prepared can be changed.
According to Eric Weatherly of HUA, Dare County needs a "response" from us by]uly 7th or they lose $4 million in grant funds to
build the facility. (The grant was awarded on March 11th and no application was submitted to us until the end of May, but that's a
separate issue). At Eric's behest, I talked to Tony Chen in Public Water Supply. Tony says that we only need to agree (or disagree)
in general terms to the request in order for his folks to either award a construction permit or deny it. We don't need to provide a
(draft or final) NPDES permit, just an indication of whether or not one will be issued. I told him I didn't know if we could do that,
given the lateness of the submission from HUA and the departure from the spec limits that were provided.
There is grant money tied to the Tyrrell County, request also, but no "deadline" has been communicated to me by the applicant or
HUA.
Proceed as you see fit - I just wanted to give you what background I have on these.
CHW
1 of 1 6/13/00 2:15 PM

/aft"
IdmbN
PROJECTED CONCENTRATE WATER DISCHARGE QUALITY
PROPOSED REVERSE OSMOSIS WATER TREATMENT FACILITY
TYRRELL COUNTY, NC
May 3, 2000
•
Ca
285.79 mg/1
•
Mg++
288.78 mg/I
•
Na++
4,928.21 mg/l —
•
K+_
_.__-318.79 mg/I
-NHS
•
SR
600 mg/1
•
Ba
2,740 mg/1
•
Fe++
242 mg/l
•
Mn++
22 mg/l
•
CO3""
2.8 mg/l
•
HCO3�
0.6 mg/l
•
SO4 "
< 0.1 mg/l
•
C1"
2.6 mg/l —
•
NO3"
0.08 mg/l
•
F"
50 mg/l
•
Si02
8.5 - 9 mg/l
• Sum of Ions
15,284.29 mg/l
• TDS ( 180 C)
14,2-19.92 mg/l
• pH
7.88 mg/l
• Hardness (as CaCO3)
1,902.90 mg/l
• Langlier Index
1.99 mg/l
• Stiff -Davis Index
1.27 mg/l
0

To:
Point Source Branch SOC Priority Project: Yes No
_X_
NPDES Unit
Water Quality Section If "Yes", SOC No.
Attn:
Susan Wilson;'I%vironmental Engineer D
NPDES Unit
Water Quality Section
JUL 2
Date:
7-12-00
NPDES STAFF REPORT AND RECOMMENDATION
J
_
Tyrrell County DE!'^ - .: ;
Permit No. NC0086924 PC
PART
-
I - GENERAL INFORMATION
1.
Facility and Address: Mr. J. D. Brickhouse, County Administrator, P.O.
Box 449, Columbia, North Carolina27925
2.
Date of Investigation: site visited on several occasions
3.
Report Prepared by: Al Hodge
4.
Contact Person and Telephone Number: J.D. Brickhouse-252-796-1371, Eric
T. Weatherly, PE, Hobbs, Upchurch & Associates-252-441-3913
5.
Directions to Site: Beginning at the intersection SR 1117 & SR 1200,
which is named Bay, in the northwest section of Tyrrell County, proceed
northeast along SR 1200 for approximately 0.3 miles to a private road on
the north side of the road, the water treatment plant is approximately
0.25 miles down this road; the discharge can be reached by continuing
along SR 1200 to its intersection with SR 1202, proceed along SR 1202 to
the terminus, the discharge line enters Bull Bay through a private lot
approximately 100 feet to the west of the end of SR 1202
6.
Discharge Point
Latitude: 35°-56'-16" Longitude: 760-21-'-18"
Attach USGS map extract and indicate treatment facility site and
discharge point on map.
USGS Quad Name: Columbia West
7.
Site size and expansion area consistent with application? Yes X No
If "No", explain:
8.
Topography (relationship to flood plain included): 20 ft. MSL
9.
Location of nearestdwelling: Discharge line reaches Bull Bay through a
private lot, the water treatment plant is several hundred feet from a
dwelling
10.
Receiving stream or affected surface waters: Bull Bay - Pasquotank River
Basin
a. Classification: SB
b. River Basin and Sub -basin No. 03-01-53
C. Describe receiving stream features and pertinent downstream uses:
full body contact, boating, fishing
PART
II - DESCRIPTION OF DISCHARGE AND TREATMENT WORKS
1.
a. Volume of Wastewater to be Permitted: 144,000 gpd

b. Description of proposed wastewater treatment facilities: No
treatment proposed. Reject water from a Reverse Osmosis
C. Possible toxic impacts to surface waters: Additional analysis is
to be required. A conclusion can not yet be reached.
2. Residuals Handling and Utilization Disposal Scheme: N/A
3. Treatment Plant Classification (attach completed rating sheet): N/A
4. SIC Code(s): 4941
Wastewater Code(s): 22
Main Treatment Unit Code: 00
PART III - OTHER PERTINENT INFORMATION
1. Is this facility being constructed with Construction Grant Funds or are
any public monies involved (municipals only)? YES!
2. Special monitoring or limitations (including toxicity) requests:
Toxicity monitoring, Additional monitoring may be requested upon
additional analysis of reject water
PART IV - EVALUATION AND RECObZWAMATIONS: I have reviewed the application and
have the following concerns and questions:
• Please discuss the manner in which the "Projected concentrate discharge"
was arrived at;
1. At what depth was the sample taken for the reject quality
determination?
2. What is the possibility of finding a different aquifer with a
higher quality of raw water?
3. Where is the well located the samples were taken from?
4. Does the absence of several heavy metals in the projected
concentrate mean the parameter was below detection levels or
the parameter was not tested for?
• The location of the proposed discharge is undesirable. The diffuser should
be in a depth of water where the discharge would not cause surface
turbulence. The discharge should also be at a location that offers the best
possible dilution reasonable in the area. It is my opinion that this
discharge does not do this.
• Has the County secured permission from the private land owner through which
the discharge pipe line goes to reach Bull Bay?
I am unable at this time to make a recommendation until additional information
is submitted.
Signature of report preparer
A -Water Quality Regional Supervisor
Date
NPDES Permit Staff Report
version 10/92

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I of 2 7/12/00 11:22 AM

H4:Jobbs, Upchurch & Associates, P.A.
i
Consulting Engineers
2522 S. Croatan Highway • Suite 2A • P.O. Drawer 1929 • Nags Head, North Carolina 27959
May 24, 2000 Q _ Y
LI JUN - 1 2000 I
_!
' �:::{;t _'n,i.il.I; fey; •. I?Y
David A. Goodrich
NCDENR
Division of Water Quahty/NPDES Unit
1617 Mail Service Center
Raleigh, NC 27699-1617
RE: RO WTP Concentrate Discharges
Tyrrell County and Dare County
HUA No.: TY0001 —Permits
I01R1111I471= rm� Iom
Dear Mr. Goodrich:
Tyrrell County and the Stumpy Point Water and Sewer District (Dare County) are
proposing to construct reverse osmosis water treatment facilities. On March 10, 2000,
both counties received grants from Clean Water Bond — DENR High Unit Cost Grant
Funds to construct their project. A stipulation of the grant is to receive the Public Water
Supply Section (PWSS) permit by July 7, 2000. Per a conversation with Mr. Tony Chen
of the PWSS, an NPDES permit will be required to receive a PWSS permit.
On May 15, 2000, the NPDES permit applications for both projects were submitted to the
NPDES Unit. On May 24, 2000, plans and specifications for both projects were
submitted to the NPDES Unit. Everyone understands that this does not allow the time
required to issue an NPDES permit. Mr. Tony Chen has agreed that a letter received
from your Unit by July 7, 2000 indicating it is possible to receive the NPDES permit will
be sufficient for the PWSS permit. This will allow the necessary time to hold public
hearings and/or address comments, etc.
Mr. Al Hodge of the Division of Water Quality, Washington Regional Office, is also
familiar with the projects and has visited the sites. Mr. Hodge pointed out that the
proposed projects are similar to previous projects with which he has been involved.
Nags Head, NC • Telephone [phone] • Fax [phone] • e-mail: info@ hobbsupchurch.com
Southern Pines • Myrtle Beach • Raleigh • Charlotte

*s
,-r
David A. Goodrich
HUA Nos.: TY0001 and DR0004
May 24, 2000
Page 2
The following is a brief outline of the projects:
TYRRELL COUNTY
A grant was received in the amount of $1,874,375 from Clean Water Bond funds for the
construction of a 300 gallon per minute reverse osmosis water treatment facility, a
300,000 gallon ground storage tank, two groundwater wells, 8-inch water transmission
main and discharge.
Water will be supplied by two wells drilled into the Castle Hayne aquifer. Although
there is an ample supply of water in this aquifer, the chlorides are at a level which will
require membrane treatment.
The reverse osmosis concentrate discharge will be approximately 144,000 gallons per day
(100 gallons per minute) at full capacity. The proposed discharge will be into Bull Bay
off the Albemarle Sound. The discharge will consist of a 4-inch directionally bored pipe
from the shore into Bull Bay. We propose to locate the discharge approximately 100 feet
from the shoreline. A discharge header will be installed at the end of the pipe on the
bottom of the bay.
STUMPY POINT WATER AND SEWER DISTRICT (Dare County)
A grant was received in the amount of $1,901,845 from Clean Water Bond funds for
construction of a 50 gallon per minute reverse osmosis water treatment facility, 75,000
gallon elevated storage tank, two groundwater wells, 8-inch water mains and discharge to
serve the Stumpy Point Community.
Water will be supplied by two wells drilled into the Yorktown aquifer. Although there is
an ample supply of water in this aquifer, the chlorides are at a level, which will require
membrane treatment. The reverse osmosis concentrate discharge from the facility will be
approximately 38,880 (27 gallons per minute) gallons per day and a filter for iron
removal will have a backwash discharge of approximately 4,320 gallons per day at full
capacity.
We propose to locate the discharge in the Stumpy Point Bay near the intersection of N.C.
Highway 264 and Stumpy Point Road. The discharge will consist of a 4-inch
directionally bored pipe from the shore in the Stumpy Point Bay. The proposed

David A. Goodrich
HUA Nos.: TY0001 and DR0004
May 24, 2000
Page 3
discharge will be approximately 100 feet from the shoreline. A discharge header will be
installed at the end of the pipe on the bottom of the bay.
It is our opinion that any specific issues ofthese projects can be addressed given
sufficient time. However, the funding requirements are unique in that a short time frame
has been allowed by the grantors to receive an NPDES permit. Therefore, it is requested
that after your review of these projects and working through any major issues, letters be
written to the PWSS indicating that receipt of NPDES permits is possible.
The water treatment facilities for Tyrrell County and Stumpy Point are needed and will
not occur without the grant funds. Your assistance in meeting the grant requirements will
be greatly appreciated. If you have any questions or if additional information is needed,
please do not hesitate to contact me.
Sincerely,
HOBBS, UPCHURCH & ASSOCIATES, P.A.
r1
Eric T. Weatherly, P.E.
Division Manager
ETW/hb
Cc: Tommy Stevens, Director, Division of Water Quality
Coleen Sullins, Chief, Water Quality Section
Tony Chen, Public Water Supply Section
Al Hodge, Division of Water. Quality
Robin Peele, Public Water Supply Section
J.D. Brickhouse, Tyrrell County Administrator
Bob Oreskovich, Director, Dare County Water Department
Fred Hobbs, HUA
I UYUAKDH1proJectsIDARE COUNn 1DR000d Stumpy Point Water & Sewer District Community Water Syslem000 PERA4MG00DRICH.3.doc

..
,.
Hobbs, Upchurch & Associates, P.A.
Consulting Engineers
2522 S. Croatan Highway • Suite 2A • P.O. Drawer 1929 • Nags Head, North Carolina 27959
May 15, 2000
David A. Goodrich
NCDENR
Division of Water Quality/NPDES Unit
1617 Mail Service Center
Raleigh, NC 27699-1617
RE: NPDES Permit Application
p ��L WI
MAY 19 MW
�i
DENR - WATER DUALITY
POINT SOURCE BRANCH
Tyrrell County Reverse Osmosis Water Treatment Facility
Tyrrell County, NC
HUA No.: TY0001 —Permits
Dear Mr. Goodrich:
Tyrrell County has received a Clean Water Bond Grant for the construction of a new
reverse osmosis water treatment facility. The facility will serve the northwest section of
the County and will be located in the Bull Bay community area. The existing water
treatment facility is near capacity and the proposed treatment facility is needed to meet
the growing demands of the County.
The proposed reverse osmosis treatment facility will have a capacity of 300 gallons per
minute. Water will be supplied by two wells drilled into the Castle Hayne aquifer.
Although there is an ample supply of water in this aquifer, the chlorides are at a level
which will require membrane treatment. The reverse osmosis concentrate discharge from
the facility will be approximately 144,000 gallons per day at full capacity.
The proposed discharge will be into Bull Bay off the Albemarle Sound. The discharge
will consist of a 6-inch directionally bored pipe from the shore into Bull Bay. We
propose to locate the discharge approximately 100 feet from the shoreline into the Bay.
A discharge header will be installed at the end of the pipe on the bottom of the Bay.
The following information is attached:
• U.S.G.S. Quadrangle Map illustrating discharge location
• Anticipated discharge water quality
Nags Head, NC • Telephone [phone] • Fax [phone] • e-mail: [e-mail]
Southern Pines • Myrtle Beach • Raleigh • Charlotte

!►,
1
s
David A. Goodrich
HUA No.: TY0001— Permits
May 15, 2000
Page 2
Your attention to this matter is greatly appreciated. If you have any questions or if
additional information is needed, please do not hesitate to call.
Sincerely,
HOBBS, UPCHURCH & ASSOCIATES, P.A.
Eric T. Weatherly, P.E.
Division Manager
ETW/hb
Attachments
Cc: J.D. Brickhouse, Tyrrell County Administrator
IIHUAKDHIprojects177RREU COUNT) 1770001 Water System lmprovenrents000 PERAMSI000DRICH.doc

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State of North Carolina
Department of Environment
and Natural Resources
Division of Water Quality
James B. Hunt, Jr., Governor
Wayne McDevitt, Secretary
Kerr T. Stevens, Director
May 3. 1999
Mr. Eric T. Weatherly. P.E.
Hobbs. Upchurch `& Associates, P.A.
2009 S. Croatan Highway
P.O. Drawer 429
Kill Devil Hills, North Carolina 27948
�0153
1�
���a
NCDENR
NORTH CAROLINA DEPARTMENT OF
ENVIRONMENT AND NATURAL RESOURCES
Subject: Speculative Limits Request
Proposed Dare County RO
Proposed Camden County RO
Proposed Tyrrell County WTP
Dear Mr. Weatherly:
On April 1. 1999, the Division received three requests for speculative effluent limitations,
one for each of the above referenced facilities.
Based on available information and current Division policy, the speculative effluent limitations
for the above referenced discharges are summarized in the attached tables. These speculative limits
are issued for discharges to waters of the state as summarized below:
Dare County RO - Stumpy Point Bay
Camden County RO - Pasquotank River
Tyrrell County WTP - Scuppernong River
Please note that should the County wish to pursue receipt of NPDES permits, application
packages should include a summary of alternatives to surface water discharge, source water data, and
expected effluent concentrations from each facility.
If you have any questions or comments regarding these speculative limitations, please do not
hesitate to contact Mr. Mark McIntire at telephone number [phone], extension 553.
Sincerely
404�rd
David A. Goodrich
NPDES Supervisor
Cc: Central Files
NPDES Permit File
Washington Regional Office. Water Quality
P.O. Box 29535, RALEIGH, NORTH CAROLINA 27626-0535 TELEPHONE [phone]/FAX [phone]
AN EQUAL OPPORTUNITY AFFIRMATIVE ACTION EMPLOYER 50% RECYCLED/ 10% POST -CONSUMER PAPER

A (1). EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS - Speculative Permit No. NCOOXXXXX '
During the period beginning on the effective date of the permit and lasting until expiration, the Permittee is authorized to discharge from outfall(s) serial number 001-
Sofener Backwash. Such discharges shall be limited and monitored by the Permittee as specified below:
.: `. , ,,.. f�, 4
EFFLUENT CHARACTEDrSTIC.S.L-�{i#xDISCHARGE;LIMITATIONSr_.j
... .. +T. i- T .... ,.. .. ..vr
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_ , . > _ � .,.,. E•. :.... .._._
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Estimate
E
Total Suspended Solids (TSS)
30.0 mg/L
45.0'mg/L
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Grab
E
Settleable Solids
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0.2 ml/L
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E

i
NCDENR/DIVISION OF WATER QUALITY
Water Quality Section/NPDES Unit
April 28, 1999
MEMORANDUM
To: File
From: Mark McIntire
Subject: WTP Speculative Limits Requests
On April 1, 1999, we received three speculative limits requests from Hobbs, Upchurch `Q
Associates. The requests are summarized below:
• Dare County- 0.015 MOD of RO reject into Stumpy Point Bay
• Camden County - 0.452 MOD of RO reject into the Pasquotank River
• Tyrrell County - Filter and softener backwash into the Scuppernong River
Stumpy Point Bav
• Classified SA waters
• Speculative limits drafted in accordance with the January 12, 1999 policy memo
Pasa uotank River
• Classified SB waters
• Speculative limits drafted in accordance with the January 12, 1999 policy memo
Scunnernona River
• Classified C Sw waters
• Speculative limits drafted in accordance with the September 50, 1992 policy memo

ENGINEERING ALTERNATIVES ANALYSIS
TO EVALUATE WASTE DISPOSAL ALTERNATIVES
Tyrrell County RO Plant
NPDES No. NCO086924
I. GENERAL INFORMATION
A. Basic Identification Information
► Facility Name: Tyrrell County Reverse Osmosis Water Treatment Plant
► County: Tyrrell
► Facility Address and Telephone Number:
The proposed water treatment plant has not been constructed and therefore
does not have a physical address or telephone number. Attachment 1 to this
report contains a location map for the proposed RO plant. The following is
the mailing address and telephone number of the point of contact with the
County:
J.D. Brickhouse, County Administrator
Tyrrell County
108 S. Water Street
P.O. Box 449
Columbia, NC 27925
[phone]
► EAA Preparer's Name, Address, and Telephone Number:
Eric T. Weatherly, P.E.
Hobbs, Upchurch & Associates, P.A.
P.O. Drawer 1929
Nags Head, NC 27959
[phone]
B. Project Description
Attachment 2 of the study contains a Preliminary Engineering Report (PER),
which was prepared in March of 1999. This study outlines the need for the
project, its sizing, location, and treatment process. In the PER, the treatment
process outline utilized conventional treatment consisting of pressure
filtration and ion exchange softening. Backwash water from the pressure
filters and the brine backwash from the softeners were to be discharged into
the Scuppernong River.
As the project proceeded, the Owners and Engineers began to realize the
problems associated with the shallow aquifers in the region and utilization of

conventional treatment in these shallow aquifers. Conventional treatment
was adequate for the shallow aquifers; however, there are major problems
with ample supply of water from these aquifers as well as a change in water
quality over a period of time primarily due to an upconing of chlorides from
the lower aquifers. It was determined that reverse osmosis treatment would
be best suited for this northeastern county with utilization of the deeper
aquifers where was sufficient quantity to meet future demands. The reverse
osmosis treatment will meet the long term changing regulations as well as be
able to treat the higher chlorides in the low aquifers. Attachment 3 to this
report contains an updated scope of the project.
As a result of the change in treatment process from conventional to reverse
osmosis, discussions were held with the Division of Water Quality to
discharge into the Scuppernong River. As a result of discussions, it was
determined it would be feasible to locate the discharge in the Albemarle
Sound in lieu of the Scuppernong River. Attachment 4 contains a location
map of the proposed discharge into the Albemarle Sound. Attachment 5
contains a letter from the Division of Water Quality indicating the feasibility
of discharge into the Albemarle Sound.
The PER in Attachment 2 illustrates the flow calculations for the water
treatment plant. It is anticipated that the RO plant will have a 25%
concentrate discharge; therefore, based on a supply of 400 gallons per
minute, 300 gallons per minute will be potable minute and 100 gallons per
minute will be discharged into the Albemarle Sound.
C. Existing Facilities
Existing facilities will not be a part of this project.
D. Project Phasing
The initial phase of the project will be a 300-gallon per minute RO plant. The
pipeline and building will be sized to allow future expansion of the treatment
process. The components of the facility will be sized to allow a future RO train to be
added to increase capacity from 300 gallons per minute to 600 gallons per minute. If
the building is properly sized, the addition of a RO train will be an easy addition in
the future.
It is not foreseeable that the growth of the County will require expansion of the plant
in the near future. It is more expected that the schedule for expansion of the
proposed plant will be dependent upon the life expectancy of the existing water
treatment plant located south of Columbia on N.C. Highway 94. The existing plant
is approximately 30 years old and is in need of major repairs and renovations. In
addition, the quality of the groundwater in the wells is deteriorating rapidly due to

intrusion of chlorides as well as a loss in flow capacity. Due to a lack of a discharge
in the area of the existing plant, reverse osmosis is not an alternative at this location.
With expansion of the proposed RO plant from 300 gallons per minute to 600
gallons per minute, the discharge would proportionally increase from 100 gallons per
minute to 200 gallons per minute or 144,000 gallons per day to 288,000 gallons per
day.
II. EVALUATE DISPOSAL ALTERNATIVES
A. Connecting to a Sewer Collection System
The nearest publicly or privately owned sewage treatment facility is located in the
Town of Creswell. This facility is approximately 7 miles from the proposed Tyrrell
County RO plant. The Town of Creswell's sewer facility is a lagoon system.
The distance to this sewage treatment facility will be much more expensive than a
discharge to the Albemarle Sound and is outside of the 5 mile radius of consideration
for the EAA. It is also pointed out that the chloride concentrations of reverse
osmosis treatment plant discharges are too high to be processed in any type of
biological sewage treatment facility. The RO discharge would quickly upset the
treatment process and render the facility useless.
In addition, there are no plans for future sewage treatment facilities within a 5-mile
radius within 5 years, public or private, in the area.
B. Land Based Disposal
Land application is not a feasible alternative for the disposal of RO concentrate.
Chloride levels in the RO co centrate would quickly kill plant life on land surfaces
including trees and grasses. Concentrate discharge from the RO plant is expected to
in the range of 6,000 ppm of chlorides. Typical land based plant life can withstand
chloride levels up to approximatley 1,100 ppm of chlorides.
There is an insufficient amount of suitable land in the area to land apply RO
concentrate. In addition, the cost for installation would be very high. As an
example, assuming a loading rate of 0.4 gallons per day/square foot would require
23 miles of drain lines or approximately 50 acres of land for the initial phase of the
RO plant.
C. Wastewater Reuse
Due to the chloride concentrations of the wastewater, wastewater reuse is not an
option for options such as land application.

D. Surface Water Discharge
1. The Albemarle Sound does not have an associated 7Q10 or 30Q2 flow.
2. Tertiary filtration on reverse osmosis concentrate will not provide quality
improvements.
3. Attachment 6 to this report contains plans and specifications of the discharge
piping for the project.
4. Land Easement Agreements
Attachment 7 contains information available to date on the land and
easements necessary to construct the discharge pipe.
5. Present Value of Cost Analysis
Attachment 8 to this report contains the present value of cost analysis for the
discharge pipe.
E. Disposal Combinations
The proposed discharge of the RO concentrate into the Albemarle Sound is the only
feasible alternative for the project.

ATTACHMENT 1

11
VICINITY MAP
ATTACHMENT 0
TYRRELL COUNTY
WATER TREATMENT FACILITY
VICINITY MAP
HOD13S UPCHURCH & ASSOCIATES. P.A.
DATE: AUGUST 22. 2000 SCALE: NOT TO SCALE
DRAWN: Ar DESIGNED: ETW SHEET 2 OF 2

J
BULL BAY
REVERSE OSMOSIS PLANT
CONCENTRATE DISCHARGE
4" PVC DISCHARGE MAIN
TYRRELL COUNTY WTF
VICINITY AND LOCATION MAP '"1,1WP
11111iLt�.`00%slI 7.'L 00
.
TYRRELL CO. WATER SYSTEM IMPROVEMENTS
FIGURE 1
R.O. PLANT CONCENTRATE DISCHARGE
I --
HOBBS,, UPCHURCH& ASSXIA TES P.A. SCALE: DESIGNED: ETW
COAGUL7W E GWEERS 1 "= 600' DRAWN: DCJ
NAGS hE4Q, A ORN CAROLWA 27Z9 DATE: CHECKED: ETW
lqj 25V 5 CROATAN W, &RE24 MAY 2000
252-441-M FAX 252 44f-2M SHEET: 1 OF 4

ATTACHMENT 2

PRELIMINARY ENGINEERING REPORT
ADDITIONAL WATER SUPPLY SYSTEM
TO SERVE
COUNTY OF TYRRELL
,���Ilittf/f�I
.•`'��N CAROC jy
gs�
4p q
�SE
'14996
Z.
IN
PREPARED BY
HOBBS, UPCHURCH & ASSOCIATES, P.A.
.2009 S. CROATAN HIGHWAY
KILL DEVIL HILLS, NORTH CAROLINA
MARCH 1999

I. General
Tyrrell County built a county water system in the mid 1970's primarily through a grant
from the USDA -Farmer's Home Administration Program. Since then, the system has
expanded through various Department of Commerce — Community Development Block
Grant programs. The system consists of approximately 115 miles of 8-inch and smaller
. water mains. Water is supplied by two wells and a conventional pressure
filtration/softening water plant.
There are approximately 1,121 residential users and 10 commercial. users. The County is
. very rural and the commercial users are primarily farmers.
The northwest corner of the County is isolated by the Scuppernong River. An 8-inch
subaqueous water main crossing this river in one location provides all the water to this
region. There are approximately 400 users in this section of the.county which would be
out of water if the water main crossing were ever to fail.
The water treatment facilities are nearing its rated capacity. An additional water source is
needed to meet the demands of the system as well as provide a water source in the
northwest corner of the County should the Scuppernong River water main crossing ever
fail. The State of North Carolina is building a 4-H Center in this section of the County.
Funds have been allocated with the 4-H Center to construct a 200,000 gallon elevated
storage tank. The County does not have the means to fill this tank at the present time.
A new water plant is needed to fill the new water tank, meet the needs to the northeast
section of the County and supplement the water source for the remaining areas of the
County.
II. Project Planning Area
A. Location
Tyrrell County is located in northeast North Carolina. Columbia is the
county seat and the only incorporated town in the county. Highways 64 and 94 bisect the
County.
The existing water treatment plant is located on Highway 94 approximately four miles
south of Columbia. An 8-inch water main extends from the water treatment plant and
crosses the Scuppernong River fo serve the northwest portion of the County.
The target area is the northwest corner of the County. There are approximately 400 users
in this area. There are also plans to construct a 4-H center and 200,000 gallon elevated
storage tank in the Bull Bay area. The purpose of this project is to build a new water
treatment facility and water source in the northwest portion of the County. The proposed
water facility will serve to provide additional water for the existing facility which is near
capacity, provide water for the northwest portion of the County should the 8-inch water

main that crosses the Scuppernong River ever need repairs and serve the proposed 4-H
Center and 200,000 gallon elevated storage tank.
B. Resources Present
Water resources in the area consist of surface water and ground water.
Surface waters in the area would be difficult to treat. The waters are brackish with
seasonal fluctuations in chlorides and are high in tannins as well as color and organics.
Water sources in the area are typically ground water. Wells in the area are typically
installed in the 100-150 foot range. Ground water in the area is characterized by high
levels of iron and calcium hardness.
III. Existing Facilities
The Tyrrell County water system was built in 1976 with funds from USDA -Farmer's
-Home Administration. Since then, small sections of the County have been expanded
through the Department of Commerce Community Development Block Grant programs.
The County is very rural with large users consisting primarily of farmers. The largest
user is a newly constructed prison in the northern portion of the County.
The water distribution system consists of approximately 115 miles of 8-inch and smaller
water mains. - Presently there are three existing elevated water storage tanks located
primarily in the northern portion of the County.
Tyrrell County presently has two wells and one water treatment plant to serve the entire
county water system. Water production facilities consist of two wells located adjacent to
the water treatment plant. The wells are rated at 280 gallons/minute and 283
gallons/minute for a twelve-hour safe yield of 405,000 gallons/day. The water treatment
plant consists of iron removal, pressure sand filters and hardness removal ion exchange
softeners. The water treatment facility is rated at approximately 500,000 gallons/day. A
finished water booster pump station delivers water to the three elevated water storage
tanks. The finished water booster pump station is rated at approximately 400,000
gallons/day. The facilities are approximately 25 years old. In the summer of 1998, one
of the wells had to be abandoned forcing the County to apply for emergency funds
through the Drinking Water State Revolving Loan state revolving funds.
Section IV. Need
Tyrrell County presently has approximately 1,121 residential users with an additional ten
commercial users and one industrial user. Water records for 1998 indicate an average
daily usage of 200,000 gallons per day. The average of the maximum day usage for each
month is 350,000 gallons per day. At a capacity of approximately 400,000 gallons per
day, the existing water treatment facilities are approximately 88% of the rated capacity.
Spikes in water usage have been as high as 600,000 gallons per day. Appendix A
contains 1998 water records.
2

The industrial user is a recently constructed prison. The prison presently has
approximately 250 prisoners and has an average water usage of approximately 18,400
gallons per day. The capacity is 650 prisoners with a projected usage of 65,000 gallons
per day. The prison has 164 employees and is expected to increase to 172 employees.
The State proposes to construct a new 4-H Center in Tyrrell County. Anticipated water
usage is 45,000 gallons per month putting water production and pumping facilities near
their total capacity.
Population projections for Tyrrell County are as follows:
Year
Population
1997
2,517
i 2000
2,700
` 2010
3,150
2020
3,600
This table represents a 30% increase in population over the next twenty years. At a
present maximum day water usage of 350,000 gallons per day, antidipated water use is as
high as 455,000 gallons per day. The prison is expected to utilize an additional 46,600
gallons per day and the 4-H Center will utilize an additional 1,500 gallons per day. Total
expected water use for the year 2020 is 503,100 gallons per day.
An additional water facility is needed to meet the future water demands of the County. In
addition, an additional water treatment facility is needed in the northwest corner of the
County should the 8-inch water main crossing the Scuppernong River presently serving
this portion of the County need repairs or become damaged.
V. Alternatives Considered
A. Do Nothing
Due to expected water demands in the future, this is not a viable
alternative for the County. With the widening of Highway 64, the northern section of the
County should experience water demand growth. In addition, should the water main
across the Scuppernong River ever break, approximately 400 users would be without
water for numerous days.
B. Expansion of Existing Facilities with Intermediate Pumping Facilities to
the 4-H Center Elevated Water Storage Tank
The County does not presently have the means to provide water to the new
4-H Center and proposed 200,000 gallon elevated water storage tank. One alternative is
to install a new booster pump station to fill this tank.
3

Installation of an intermediate booster pump station to serve the 4-H Center tank would
involve installation of a new booster pump station and ground storage tank in the vicinity
of the Scuppernong River water main crossing, new 8-inch water main from the booster
pump station to the elevated storage tank and installation of an additional river crossing
pipe. The cost estimate for this alternative is as follows:
Intermediate Booster Pump Station Facilities
1. Booster Pump Station
. $ 952000
2. Ground Storage Tank
$ 752000
3. Land (one acre)
$ 5,000
4. 25,000 feet 8-inch water main
$3002000
5. Telemetry
$ 52000
6' River crossing pipe (100' @ $175/foot)
$1752000
Total Construction
$6652000
Contingencies (10%)
$ 652500
Engineering (15%)
$ 983,250
Grand Total:
$818,750
In addition to the above mentioned pumping facilities the existing water treatment plant
facilities will still need to be upgraded in the near future. This facility is approximately
25 years old and is not set up for expansion. It is anticipated that expansion of the
existing plant would be as costly as construction of a new facility.
C. New water treatment plant facility
A new water treatment facility is needed to meet future water demands of
the County. This facility would be used to supply water to the northwest portion of the
County as well as supplement the water demands for the remainder portion of the
Countv. A new water treatment facility would be constructed in the northwest portion of
the County and would save the cost of the installation of an intermediate booster pump
station and additional river crossing pipe to serve the proposed 200,000 gallon 4-H
Center tank.
Proposed Project
A. Design
The 4-H Center and elevated water tank is proposed in the Bull Bay area
of Tyrrell County. The new water treatment facility would be constructed in the
Woodley area along NC Highway 64 west of Columbia. The new facility will be
approximately five miles from the proposed water tank and be located in a central
location to serve the County better and supplement the demand of the existing water
treatment facility. It is anticipated the water quality will be similar to the existing system
requiring pressure filtration for iron removal and ion exchange softeners for hardness
4

removal. A new 8-inch water main would be will extend from the treatment facility to
the 4-H Center tank. A project description layout map is presented in Appendix B of the
report.
1. Supply
Ground water from wells will be utilized for the water source.
Test wells will be performed for the actual design requirements for the water treatment
plant. Preliminary design of the plant is based on water quality and quantity from
existing wells in the area. Depth of wells in the area is approximately 100-150 feet and
are high in hardness and iron.
Two 300 gallon/minute wells are proposed. This will allow for a.3 00 gallon per minute
rwrater treatment plant with 12 hour run time for each well. One acre will be needed for
each well site. The wells will be placed at approximately 2,500 feet to prevent
overlapping of the cone of influence on the wells. A 6-inch water main will be installed
-from the remote well to the water treatment facility. The other well can be located
adjacent to the water treatment plant.
2. Treatment
The eater in the area must be treated. Iron and calcium hardness
must be removed to meet State limits. To meet future needs and water quality standards,
a 300 gallon/minute pressure filtration and softening plant is proposed.
Raw water from the wells would first be processed through an aerator. The aerator would
remove odor (hydrogen sulfide) and assist in oxidation of the iron. Two pressure filters
would be needed at 150 gallons per minute per filter. This would be followed by two
cation exchange softening units for hardness removal. Finished water from the plant
would be pumped into an on -site 100,000 gallon ground storage tank. Finished water
high service booster pumps would draw water from the ground storage tank and pump
water into the distribution system and fill the proposed 4-H Center elevated storage tank.
The water treatment facility including filters, softeners, and finished water booster pumps
would be housed in a 2,500 square foot pre-engineered metal building or block building.
Backwash water from the facility is expected to be in the range of 22,000 gallons per day.
It is proposed to install a 6-inch water main to discharge backwash water into the
Scuppernong River. An NPDES Permit will be needed to allow discharge of the
backwash water.
3. Storage
The County has three existing elevated storage tanks. The existing
tanks are as follows:
250,000 gallon tank at the existing water treatment plant

200,000 gallon tank at the prison facility
100,000 gallon tank in the Alligator Community area
The new 4-H Center in Bull Bay will include a 200,000 gallon elevated water storage
tank. The County has an ample supply of water storage to meet the future needs.
4. Distribution
An existing 8-inch water main extends from the existing water
treatment facility to the Woodley area.' The proposed water treatment facility is located
in the Woodley area. From this point, existing 6-inch and 4-inch water mains extend to
the Bull Bay area where the proposed 200,000 gallon elevated storage tank is located. A
j 300 GPM facility pumping water to the elevated storage tank in Bull Bay will exceed 125
psi.
A new 8-inch water main is proposed to extend from the proposed water treatment
"facility to the Bull Bay tank. Length of the proposed water main is approximately 25,000
feet. Location of the proposed treatment facilities in the Woodley area will provide an
amply supply of water to the northwest portion of the County while filling the proposed
Bull Bay elevated tank as well as the supplying water through the existing 8-inch water
main to the remaining portions of the County.
B. Cost Estimate
A breakdown of the project cost is as follows:
Water treatment plant building
Water treatment plant equipment
Water treatment plant electrical
and controls
Water treatment plant aeration and
backwash basin
100,000 gallon ground storage tank
300 GPM well
High service booster pump station
8-inch PVC finished water main
6-inch discharge main
Total construction
Contingencies (10%)
Engineering design (9%)
Engineering inspection (6%)
Land (2.5 acres)
Grand total
2,500 sq. ft. @ $95/sq. ft. $ 2373,500
lump sum @ $250,000 $ 2502000
lump sum @ $140,000 $ 1402000
lump sum @ $70,000 $ 701,000
lump sum @ $87,000
$
872000
2 EA @ $952000
$
1901,000
lump sum @ $652000
$
652000
251,000 LF @ $12/LF
$
3002000
152000 LF @ $10/LF
$
1502000
$1,489,500
$
1482950
$
1342055
$
89,370
$
12,500
$198742375
6

C. Annual Operating Budget
A copy of the annual operating budget is contained in Appendix C of this
report. Water revenues for Fiscal Year 1998-1999 are $392,104. The only immediate
increase in expected revenues are from the proposed 4-H Facility. At an expected 45,000
:. gallon per month additional revenue is $1,227 per month for a total water revenue of
$3937331.
The expenditures are not expected to increase a great deal immediately because water
production will be a gradual increase. However, several expenditure accounts will
increase due to the proposed plant. These expenditure increases are listed as follows:
• Lab test $ 850
• Chemicals $ 13900
• Salt $ 52400
• Insurance building $ 4,000
• Utilities $ 4,400
• Total $162550
The net increase in system operating cost is $15,323. Increase in expenditures charged to
1.131 users is an increase of $1.13 per month in the water bills. Average water bills are
presently at $14.79. The expected water bills will be $15.62. The high unit cost bill for
Tyrrell County is $13.02 per month.
VII. .Conclusion and Recommendation
A new water treatment facility and an 8-inch distribution main to the proposed 4-H
Center elevated storage tank is needed to meet the needs of the Tyrrell County- water
system. Total cost of the proposed facilities is $1,874,374. It is recommended that
Tyrrell County apply for the High Unit Grant Application Program through the
Department of Environment and Natural Resources. The present average residential
water bill is $14.79. To be eligible for the high unit cost grant, water bills must exceed
$13.02. These facilities are needed; however, the residents of Tyrrell County cannot
afford an increase in water bills to fund such a project nor does the County have the
bonding capacity to borrow the money. A 100% grant is needed to make this project
feasible.
7

Appendix A
1998 Water Records
8

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?. s 7 s 11501
142
/ 10 1
(�'
l.•5
1
?Q
- 2 �•( I
IZ(•
n
I I /2-
7-5
>
S�
Li25
/. ai
1
I
• I
1 '7
11.sa11
1 I I
7
I?V
!.v
1• �� I
?
I
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I I
I I� �:.
1
/
I 11. I
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I 11 v
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I 0•11.
o
6%
j 1 rl I
o
C)
1
I I
1
I
,5
7
,.• I
I j/._
--1
7. 5
.5 r s rJ
C) -I
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). c%
1 / • o
I
1
o
1
so ;, I
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• .S 7- /sei
:0
:-
I
l I
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7.
7.5 17-s lksu
I150
I. C;c
3
.1 I
OI.
7
°
T
17. � /. I ys. (1. C� I
i z•
Total Number `Wells
in System:
kva
I-
77.447.9
Remarks:
J"
' max. 1
7
/ Sr
I 'Ain.
7
Izi �k+a71
1 '
=HNR 2398 (Revised 2/92) 1
' Sioned: � l •� � Certification: Grade . � - No. .
ate Suoaly (Review 2/93)

PUBLIC WATER SYSTEM FOR: rr C� ! r' L/;-�C----- PWS1D: O�.S
ells Reporled:
OPERATION
CHEMICALS
USED I
OTHER
MONITORING PARAMETERS
c
.-.. �.
.. -.
PH I
Hardness (mo/I)
I Iron (mo/I)
Free
Chlorine
Residual (mo/I)
m
3�r C.
m
G ..
c N }
�.� "�� ��
O
c -.
C
<
0
h
c
o
_
E
;
E
c
System
SamDte Location
O
R
_ a C 7 m
O
_
q C v m A Z
u o r-
L
._ .�
_-
c ...
C
C
C >.
L• N
_m
c O
C N
�• O
V! C LL
>-
N
C
}
Vi
1) (
(2) I (3) j
(4)
(5) (6)
f%) ( (8)
f9) i (10) (Itt)
(12)
(13)
f (14)- 1.(15) (16) I (17)
(18) 1 (19) ' (20)
(21) (22)
(23)
(24) .
of
3.51
'7.51
.51 li.solCo
11•0
I
1
7.3
1
bo (
1
2 1
I I
,
7.
I .SI I
v I
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o • of
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r SDI
a l
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7. 17. j
50 l I
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a R. 0 1
7 1
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r
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d
l �-5
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o I
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I �•
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/ • i�
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/ //-
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2 I
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17
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I � S � I/
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5
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sc� I, n I
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7- S
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1
7 Iz
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7
I
1
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/ c I
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o
.v
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7 S
7. 6 17 S
1 tso
I I I
4-�
•7
I L� '
-
/r 5 ( / •
6'?) I
O • C�
( Total Number of welts
7
�
('
%
7� (/. �
/Jc�
/� 7 .O I
�'
/, (� In System:
%Va.
lax.
14
1 7
Remarks:
.
HNR 3398 (Revised 2/92) / -/jj% Certification• Grade r3' 1z 4--Al No. 1
. per SuDDty(Review 2/93) Sinned:
1

N.C. De1)anrnPn1 of environment. Health. and Natural Resources V f v r 1,. t «. , , .. , , -..•• • ••••• - - - --, . - - • . •
�ra fy f -9.2-- /S "
Month: %r"i''e ll CC.- PWSID.y
Year: PUBLIC WATER SYSTEM FOR:
Wets Reported: rf'.✓O
OPERATION
CHEMICALS
USED
OTHER
MONITORING PARAMETERS
-- -- --
0H
Harc(ness
(ma/1) I Iron Imo/11
Free Chlorine Residual. (mo/11
2 ^ A fa
a m
3 o M
„ „ „
ac
x 2
,,
a r
5
a o
2
0
0
_
System
Sample Locationit
068
O O M O
°: u
a — rz a
m
U
m 3 a,
Z
U
.. .., a �.
•�
u. rn
c[
N
to a vi
c
a
(3) (4)
(11 I (21 I
(5)~
(6)
(7) (8) (9I
(10)
(11)
(12)
(13) (14). 1.(15)
(16) I
(17) I
(t8) I (191 (20) (21) I
(22) I (231 ( (24) .
I
I
2
I I
3 ! I
4 I I
Ien
7 lz
I
7 1 1
I 1 x
17. 7
7. 1717 .r 1
i b
I
.0 I
17n11
5 o
6 I I
I
ro I I .�
�•. I/
o
7G o
1 1 7
I /3. I
7. I �.
1.410
1
0 1• v l I
8 1
/� 1, :.I
7. S 7, 5 I.
I
, 0 1 I I
fa 17
0
13 I /1
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l o
l
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I
10 ( o
. I 1•
I !s 7
12 I I 1 7
��
4 1 ,(�I
7. I I
7.7.
7S
501
1
I
I
C./.
.
11.0
n
.�
�3 I
14 I 7
l
to • I15.-7
7.5 1 •5
7•S
I
�J I
r.0
o
,6 1
( g.v
7 6 -
�•
1�sa1
170
. Q
1 o
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01
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17
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0.1
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o 1 10
17 I 7
/ Q
I 17.
of
IInI
.ol t o
I
18 I a l 1 7
19
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c l 3
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7.5 D-6
1�•6
I /5u
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l �t
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I I .v I
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I
'•
I
1 ,
20 •z I �
" s� I
i I I /�l. roI
I
I�,
I /Sc (
�
o o
1
1.
I
21 I 1 1 7
,td
/ 7 I I
7.
115 Q I
I %v
•
22 I 6, 1 17
W41pol
19, I
761
j4 C31
1 lv
/ C-1 I 1 0
l.
17 ' 1 /sol
I /. u 0
0
S
•
I
I
1
23 -1-7 7
eo
% S $.b
7. 5 17
24
s.K
7S 17_ s
715 isC
o
t. I
jz;to•
•
25 7
I I
5
S:
I. o o
o
I
26
6
S
75 11501
156.11.01
0y
I /. c. o
I
2; ( I -7
I�u 41-
I a I ii s l
7-5- ,75
. S 1 Svl
3 �0
7'
3 c
I I.O
.
2g
9( I I �+: I
I 1
7.
6
7 (i
17-
Isla
I c
C)
.s
2 .
20 6
i
30
31 I
I
�� I .I 10. I
I
•
7.6 7.6
17 � c.I
I v
I• o I o
Z
I
Tot.
I 7
GG 1
I• 5 0 1
1 i�'/P
I O
(
k
Total Number of Wells
Avo.
7
v
e I1►�
7. 5 1 7 rj
17.,6 I 5G
!G 2
/•v I 1S
l��
%
In System:
Max. 5
( 7
1
1
Remarks -
Min.
( 7
�•�
DEHNR 3398 (Revised 2/92) Certitecation• Grade '� No.
Water Suooiy (Review 2/931 Signed:

.10n1h.. v v.-►"
ear: My
0 y- 3-9-r'V5
veils Reported:
A rre- ��. PWSio:
PUBLIC WATER SYSTEM FOR: _
-7-
OPERATION
CHEMICALS
USED I
OTHER
MONITORING PARAMETERS
c
-
--
--
pH
Hardness (mo/1)
I
Iron (ma/1)
Free
Chlorine
Residual (mg/1)
3•oM
c
c
c.
=
o`.
y „ y
a
,.
m
o
o
,
c
-
Svstem
Samote OCaIIOR
m
m C' C
d c
`- o
C O
a O
C<
x O
m 3
p 2
` `-
�
•-• C .-
.. I
3 '" •n
C t% rn
3
C v°�
n
v}.•
3
C �.
w
N
E
W
C
I11 (
(2)
(3)
(4)
(5)
(6)
(�) I
(8) (9) I (10) , (tl)
(12)
_ (ta)- 1.0 5)
(t6) ((17)
(16) 1 (t9} 1 (20) I (21) (22)
(231 (
PA)
I/
1
7•
990
� I
I /z 1
-(13)
I• 17 5 -6 115ol
IY1
"0- f
o
I
7
u 1
I iZ.SI
.7
�. 51 .5
2 26 1
3
,
. ?. 1 I
7 12J
ch0
/2
I
I
1 •Z
111.6
7.5175 17•
7.517.6 17•
01
1
1
I
1.01 1 0 {
1• �i
e i
.2. I
7
ii
5
II a
-7- 5 7-5 I
1
1jig 11, !
o
'.
5 I • L5 I
5
1
/
�
7•
o
51
I
1
7
.I 17
1 .3 I
7.517.5
/ c1
(
•
6 l,^
1
1
7;
I
IjZ, I
7- 7. 17.5
G
o I!
I I
I
o
-7-7
r
1 -7
l' 7
7. 7•-67•SI
0
I It•,I
1. I
1
o f
I
1e
•:
.
-� 7
I 17
c
or,(
i
i z..�!
7. 7
1
AJ p
- 2 1
G
I 1
7
I- et
1
11 �. � I
17•.5 -2 5/
. I
.01
1
7��
I
6. l
`7.5 7 5 7-:5
/661
.
4 I,
_
30.
rl
7'
/�.
{7• 7-s . 1
o
5
.30-
7
7
Aisoo
o
liy.
I -3 I
1'7-S 7•S 7-
7.5 7• 'I7•
l50
150.
I I
l 0l
I ICal
1.01
n
6
- 1,,
1.
4 g•
I 17
I
7
1 ,I
,,1.
/
l 3, 51
17. 5
/bo
5- I
1.01
a
.7
7
1-. 1A
r
1is.
�> I
.s 7. 7• S
7 1
11.501
6o>.
o9
I
: (
T�
S
I
o I
I- I
/
5 0 I I 1
0
�o
'I I
z
I
1
17
-,0I
1 vol
li
(i3.7
7.5 7• 7.5
v)
o
-
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.I.,
:t
1 7
I�-I ��,)
t
�. v
7.5 7.5 I .5
JSD I
I -,
I
o
► %
Q•
.c
'.3
, 3 �
7
12 A
(
9
( r•3
7.5
I
0 1
1 0
0
1,01
1,01
p h i'
.4
I
7
12
�µ
5.5
I
•5
I
I I I I
•1
I
,
:5
{
I
1
1
I
I
•
I
1I
o
I
I
I
1
I I
I
I
I
Ot. I
(
oa
1;
I
139�a�I
. S 7 %'
1la 50
3
TotalNumbero ells
,
7
I
�5
1
7.5 7.5 l s 1150
/. 1
I o
11.43
.
In System:
-kvc1.
n a x.
I 7
..
I i
Remarks:
-1-av�.1� .
LcJo.�-c � 1.�
7L5 /3
•..�- 5 (.......t- c� e �..� �4 r
pc�:..�•;
..� -�- �
� c�
�•f�.�.-�
�'o :-�
,
.1 i n .
I
�•1
1
'i .. NR 3398 (Revised 2/92) r Certification: Grade No. 5KI /
ier Suooly(Review 2/93) Sioned: _
�1

Ut:Ud1 IIIt:111 d• �tIYIl UI.\IIt,'l/l. .�.u.111. Y.... .•Q.4. J.
�dv�.
_.. ..
PUBLIC WATER SYSTEM
FOR: �-�
����-'�
PWSID:
Y
!ells Reported:
CHEMICALS USED
OTHER
PH
MONITORING PARAMETERS
Hardness (mo/I) I Iron (mo/I) I Free Chlorine' Residual Im2/0
OPERATION
a 0
�'
a c
..
o
'° �
=
c
co
E
m
-
o
E
=
c
=
in
System
Samote L ocation
2
L
L
U.
to
G to
WI
CD
( (12) (13)
(ta).
-05) _
(16) (17) (18) I1�)
f20)
(21)
f221 (23) I
(24) .
(8) ` (g)
(1o)
(11)
Ili
(2)
(3) (a)
(5)
(6)
(7)
I
I
It�to
i
,c6.
7
Pu
?ti
1�
23.
I�
..
. 11.6
IJ.
2
I
�
/
•
�
�
I
3
.zz
�I
fl
ffo
C,
a
•Z3
7Iz7/
4-
/c I
.6
I
C
I17
I 7�
1?•�
c• I
I r
I
(
I I
I
. X-7
11. .i
r 17
I
5'
I
�a l
/ro
11•: I
I •; I
'
I
I
v l
s i
.a•
I 7
W
.z
Q
c
1
n
I )
I S
I
•�
�p
I 1
c
1 I
• p I
7
:jLI#oco,
I Ic
I ►..�-
?
.�
I c
1-I
I �;
I
.517.
'
1
­4i
2
I I
I
s
I ��
I i. o f
i d 1. o I
i
I
I
17 I
c 1
1 &-o
I/ - a
I
a I
,I
u•
i
q
l
••C-�I
{
*7. 4
7X
I. 25
I 'P
I W. I
I
001
l 13
I
I T• 5 I7. 17•
o
( o
•o I• 1
'-0
I
1
y µ
1
7,
I 17.
II o I
1 0.
I.01
C3
.o I
.
1
! 5
I
loI
1
/°
o
I
I .o
=z
7
1 1
l �,-,I
b
l
r7 l
i o
t o
I o
1,
I
. o I
23
I
II
I/ I1
.
M o
o
97
�a
.
3
.
i
D
I•
,
25
:6
7
I2.417•
17 •s
1 1
•I o
Lk
17S
%7.S
176
c
Gco
/..
I
:7
1?
VqM I1117
�'
17.
Iso
o
v
I 1
17.S
7.17.6IISo
ISO.
/'0
I
o
,a
.0 I
4-
.2-7
4--�-7
IMo
�
7.
7.6
I7.
o
I
od
I-0
v II
o
I•R3
;1
'
'7.
7
a
1
-S
-7-5
/501
�
Total Number of Wells
o1. I
I
7
0lvt94I
Wmne
7.5 17.5.
?
IS v
o •I
In System:
4vo.
i Max.1
1 %
Oo
Remarks.
Grade
�✓ ���`���
No.. 5 J/ I
=HNR
3398 (Revised 2/92)
Sionec:
4
Certification:
mer Suooly-(Review
2/93)

Aonth: �ln.•, t
PWSIf?:
4•
,ear, c1
PUBLIC
WATER SYSTEM
FOR'
/'
,
Hells Reported:
'
OPERATION
C.
CHEMICALS USED
r. •... •...
.-
OTHER
pH
MONITORING PARAMETERS
Hardness (moA) i Iron Imo/11
Free
Chlorine
Residual Imo/tl
m c m ' „ a.
'0_
_ _
c c
o
•m-_ t
co
N m 0 3 a
System
Sample Location
ar
m E c
0.o
a 0 v c o Z
C:
cr'
U.
o
C
C aN-
� N
3
C 0
to
u.
V1
E
C.
N
C
lo-aV'
op
C4
m3 � h-
"' '•'
{7) (81 �
{9)
(24) .
(10)
(11)
(12) (13) {la).
.(15) � (�6) (17) (18) � (19) I (20) I (21) I
(22) ,
(231
f.11 I
{21 �
{3)
I (4)
(5) (61
J �,+.
I
.-S 1
•S 17
I
1
c l
a
GI I
G
.O I
l
• ( d, I
7
I!
I
2
17
1
• I
I
S 17.
/40
3
1
5
'7
i
r1
ic.III
l
7. (/ c I
G I
o
d 1 7 pe{•
7 17tc-o
/7
I
517.
l
a
I e
6
�
I
7
I 17ca
o
J�
I I
I.'
7.5
. S
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I
i o I
I
I
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i� 1
(
5
I
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I
0
rc.
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I I
i 7.r
G o
i roi
17��.�s
^ !
I
I ,
'7•s
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7.
, j
I
J I G
I I
o
l I
.C�
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14 I n
7• i
J
I
-7 76oc4
5
I
7
.
I -9
i
7.
17•� I
o.l
I
�6
..
1
I J 5
1
�.
�• 7•
! o
i
I
G
6
i; I I 7 I
� s
..
7 17oob
I
I
1.0
I•
I I I
1/7-1
I
I
I
. S •5
17 •
17 • 7.
1
1 0 l
/So
I
I
I
.
I
19 1
20 I 7
odo I
21 l� S I l
«P
Iz.ro
,p
2z Xw I
I oen I
r' 3 i
13
I
7
ISE.ioo 1
...
r.
i, _.
_ I
1 �.
! -.
I
27
-.3 I
2s
. X1 I 1 7
29
.3 I I
30
7
3i•
(
Tot.
5 I1-2
Ava.
1 7
Max.
7
Min.
1 7
)EHNR 3398 (Revised 2/921
0 Jater Suoaly (Review 2/93)
i�
%►T•v -� i
7b I o I I I
? I I12.e.-I (/v11.6C
o 1.0
7.,5 7.5 I '7•� li I i
.1 I I I I
a G (x
I ,J ,� 7. 17. o I o II. I•3 5. Total Number of Wells
v 11 I .5 •5 7 5 11 c� 1,5 I 1 U G I In System:
I -•r'G� �rv,: M.. wwFc✓ t-c:.vzst� /ou:.. �,'-�- %r•-��``l
Remarks: P�a..�.�' j�i•••'r' dnw''�
Cenircation: Grace " • �+ No. Sal%7 I
Stoned:

Year: �.% PUBLIC WATER SYSTEM FOR: 7%rre11 C-o' PWS1D:
Wells Reported:
opEnATION
CHEMICALS
USED
MONITORING PARAMETERS
--
Hardness
(mq/1) I
Iron
e Chlorine Residua (mg/1)
System
Sample Local'ion
=s
FM
WA
=Mrmm
MM
=�wj
1�
MM
=dim
�l��Ct.»��
=
__m
�m®��-
=MDw_
-i"__gm
_®®®�-EMIM_MM-
'o
_®__
-_M
Mw_FMffM_"m_
_m
"
��
_WAEMMV
W-
m_
S
'
f
m_
__Im®®
'
I
_"®M
_ffm_
_k�aft-=Ewj
_EMWA_rfm
M
•
J
"'
_�__
• •
�rm®®
'
�MOA_IMM-
•Im
M-RMI
Mmr
M
Rfw
ra9
- •®�■�
• •
���
�r-��mr���r•�r�u
-m©-�--_�-�®®-���-��_
OEHNR 3396 (Revised 2/921
Water Supoly.(Aeview 2/93) Signed: Certllication: Grade No. Sk%�
i�
i
!i

N.C. Uepanm�ut gt tnvironmestt. @ &ealtss- 4. 0 9--t 1 ...:....,,...�_
Month: 1' _ �'rell i of'.'V � PWSID:
Year: 1-9-PE PUBLIC WATER SYSTEM FOR: - 22"
.
Wells Raoorted: ZZ-v
.
OPERATION
,
�. a +
MONITORING
__r�lron
Hardness
(M9A)
(mg/
1)
Free Chlorine Residual (mg/4
System
elm
Sample Location
mmZKO
grim
Me
M_
_
m
-
r
Mre■Mm
®
,old
rr�®®M
=I=
r�©
O
m��r
���
r
�■�•
r
�r�r��
c�r�r��r��
mac-
�MEWrr�_
- •
;
r
rs�
Mm
AMMOJEMM
--
MO■co
KAM
mmu
•
0m�
s
EM
.ItWI
,
IWAR
r
�
o"I
FMAM
1"o�
mmmmmmm■■�
In S
j DEHNR 3395 (Revised 2/92) Certification: Grade U ��Gll No. /—/
= 4 Waler Suooly. (Review 21931 Signed' 5 �

Montn. t/a,
Year. PUBLIC. WATER SYSTEM FOR: PVI'S1Q:
.r-
Wells Reoorted: i wC
I OPERATION
I CHSMICALS
USED
( OTHER
MONITORING PARAMETERS
m
3 :►
a� is C C
c e �'
o
� o
° C
=
= ;
a O •Y c �
` " ©2 a
- =
� �
"'
�
�:
...
"'
=
<
...
�.
r
O
o
s
,.
DH I Hardness
Imo/11 I Iron Imo/11
Free Chlorine Resrauat tmoll:
o
,,
c
c
�.
�"
M
3
_
h
=
c
Svstem .
Samole Location
L
t+i
(2) (3) I (4) (5)
( (6)
i')X
( (8)
(9) I (10KI
(11)
(12)
(13) (14). 1.(15) 1 (16)
1 (17) I (t8)Pi 1191;'-1 (20)
1 (21)9
(22)1 (23)
(24) .
43, I 1: I---trc'
17,s 17,5 11501
13 "' !l- I
10
21
/..7
"'
17.5 1 1 '. S 11so
I
I -5o IPCI I
i
12.0 1
I
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1 1 I 1--tvo 1
5
1 ' �. I
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-7. S I;. S
I.5 C
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i
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I
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i t I7 -7eW 1•
0
I
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I
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1 1715
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1 30
1 C
t
5
ti I 1 17a' !
i
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/.5 0
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or l
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'7
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I' .I
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-7
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a �•I
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13.0
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21 I
,/ I 1 "7
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I
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! 1
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1
;.
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-50
C>
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22
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24 I
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y I i>
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41 I
i. I
C'
25 I
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i
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y l
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7 S 1
•? S It I
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i. G I 1
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1 1
26
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qI
17
S 17
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ur I
I
y� •I
i. G' I
/ •�
27
l 6
I I/Af.
31
7. 5
7. 5 17.f1
/sn I
140
l
%• o f 1
!j 046
28 I
16
I 1
/.3 , 1
12
S
-2, S
7; S JIS01
Iq,
i •G 1 10 I r• -�- I
22 I /►• I 7
I
"t• 5 I 1
17.5
I?
•S 17
51 %Sul
I
'Yo . 11.0
1 10 1 j. y. 1 1
30 I 1
1
t1
17
.5
- 3' 17.5
?r 17
17.
1156 Ilie;
S 1/5 01 I
1/,&
-Rr 11,0
1 I c
1 t!�
I
-C-I I
31 I Jl5 I I7 17c.:..
5 I
I I./
I 1
Tot. 7
7v 7'.
1. S '? s �• S o o �/ �1 17
/� i I I/Li. �1 1 > 1 =', 1is�. 1 (S�, y3 . ` I i Total Number of
' I c~ V In System:
Remarks:
Avo. . 17 I 7
Max. 14 ( 1 -7 ! o -'•
I1
Min. _I ) 1 I 1 7 I let,,
I
DEH. NR 3398 (Revised 2/92)
Water Suaoiy (Review 2/931 Signed: 'L n�li - tt
j1 Certification; Grade No. 5 Si I

•ti.
Appendix B
Proposed Project Layout Map
9

200,000 GALLON BULL BA
ELEVATED WATER
STORAGE TANK
PROPOSED 8" La7e a
WATER MAIN
Creek
Bay
i
NECK RD
I
I SCUPPERNONG RIVER\
1 1
PROPOSED
WATER_
rRAws
..� J � a v
TREATMENT
PLANTI
A.
OLD
W000LEy
SrA nON
J�5
RC SCUPPERNONG RIVER I
PROPOSED 6" `
' DISCHARGE
64
\oJ
QLD err
CRESWELL,
DISCHARGE
POINT
� Sl
LAYOUT MAP
PROPOSED NRRELL COUNTY
WATER SYSTEM UPGRADE

Appendix C
Annual Operating Budget

.w..=. rwr
&i1
bl umd
Ili.
Lwa M
d Imm
Lwa
TYRRELL COUNTY
61 WATER
FINANCE
FUND
OFFICE
FISCAL
YEAR 1998-99
ANNUAL BUDGET
REVENUE ACCOUNTS
6/ 4/98
DESCRIPTION
STATE IMPACT FEE
3711
310
PREV YEAR
1996-1997
60948
C U R
BUDGETED
0
R E N T
1997-1998
-ACTUAL
FEB. 28
0
Y E A R
ESTIMATE',-ESTIM'$TE
MAR-JUN.. Y'EAR
0 0
C O !! I
1998-1999ACTUAL
REQUEST
0
N G Y
RECOMEND
0
E A R
BOARD
APPROVED
0
CONNECTION FEES
3711
510
3000
4000
9920
0
9920
6625
6625
6625✓ .
WATER CHARGES
3711
520
220227
344589
228492
116097
-344589
342738
342738
342536.E
LATE PENALTIES
3711
580
5000
5500
3718
1782
5500
4000
4000
4000✓
INTEREST
3711
581
'
3000
0
10168
0
10168
10000
10000
10000 ✓
FUND BALANCE
3711
800
271136
30000
0
30000
30000
36414
28943
28943(;/
MISCELLANEOUS REVENUE
3711
890
0
0
3165
0
3165
0
0
0
TOTAL
s r o w s s r w
563311
s s w r r r s s r
384089
s w r w s w w
255463
w r r w s w w s s s
147879
s s s s s s
403342
a s r s r w s r
399777
r r s r s r w r
392306
s r s r s s r s
392104
PAGE 73

TYRRELL COUNTY FINANCE
OFFICE FISCAL
YEAR 1998-99
ANNUAL BUDGET
6/ 4/98
61 7110 WATER
FUND
WATER
FUND
EXPENDITURE
ACCOUNTS
PREV YEAR
C U
R R E N T
Y E A R
C O M I
N G Y
E A R
DESCRIPTION
1996-1997
ACTUAL BUDGETED
1997-1998
ACTUAL ESTIMATE
r..
ESTIMATE
1998-1999
REQUEST
RECOMEND
FEB. 28 MAR-JUN
YEAR
BOARD
APPROVED
SALARIES
120
63822
71538
45032
26506
71538
75178
75132
✓ 75132L/
SOCIAL SECURITY EXPENSE
181
4882
5473
3406
2067
5473
5752
5748
_ t/5748'�
RETIREMENT EXPENSE
182
3142
3555
2220
1335
3555
3648
3645
3645,✓
INSURANCE
183
5809
6271
3534
2737
6271
6271
7794
7592[/
AUDITING
199
3500
3500
3500
0
3500
3500
3500
3500 ✓
INSTALLATION SUPPLIES
220
9460
10054
6910
3144
10054
11350
1'0350•
10350�
OFFICE SUPPLIES
233
1734
1800
909
891
1800
1800
1800
1800
UNIFORM RENTAL
i
234
0
0
0
0
0
1092
1092
1092
PAGER RENTAL
235
0
1300
764
536
1300
875
875
875 ✓
' WATER PURCHASE
�•
250
1328
1800
387
1413
1800
1800
1800
1800�/
. GAS
251
2500
2450
950.
1500
2450
2450
2450
'
2450 ✓
LAB TEST
I
260
4457
4500
1108
3392
4500
3400
3400
3400✓
CitEMICALS
261
4500
7500
2166
5334
7500
7500
7500
7500
SALT
262
18000
21578
4943
16635
21578
21578
21578
21578v/
TELEPHONE t POSTAGE
311
6000
7500
2256
5244
7500
7500
7500
7500✓
UTILITIES
313
16500
17500
8537
8963
17500
17500
175.00
17500
TRAVEL
314
2487
2950
1833
1117
2950
4100
3500
3500�
PAGE 74

WON momi;
1
i
TYRRELL•COUNTY
61 7110 HATER
FINANCE OFFICE
FUND
FISCAL
WATER
YEAR 1998-99
FUND
ANNUAL BUDGET
EXPENDITURE ACCOUNTS
6/ 4/98
DESCRIPTION
ADVERTISING
326
PR£V YEAR
1996-2997
BUDGETED
1000
C• U
1000
R R E N T
1997-2996
ACTUAL
FEB. 28
1313
Y E A
ESTIMATE
MAR-JUN
0
R
•• _�
ESTIMATE.
YEAR
1313
C O M I
1998-1999ACTUAL
REQUEST
1500
N G Y
RECOMEND
2500
E A R
R AO D
APPROVED
1500
REPAIRS &•:MAINTENANCE
350
15000
22500
11566
lb934
22500
20500
18000
18000
COMPUTER MAINTENANCE
351
2000
1000
1000
0
1000
1000
1000
1000/
RADIO REPAIR
353
.250•
250
109
1.41
250
250'
250
250�/
CDBG GRANT -MATCH
360•
•40000
30000
1057
28943
30000
28943
28943
28943i�
CONTRACT SERVICES
440
0
0
0
0
0
520
520
520
ENGINEERING FEES
441
6000
6000
1331
4 6*6 9
6000
6000
4000
4000
BOND
•
454
100
100
78
22
100
100
100•
10 0
INSURANCE BLDG
t
456
8500
8500
8500
0
8500
8500
8500
8500t�
DUES
491
368
448
430
18
448
550
550
550
CREDIT CARD FEES
!
495
100
100
0
100
100
100
100
100✓
CAPITAL EXPENDITURE
`
500
1833
411
1266
p
1266
17300
1.4459
14459 ✓
CAPITAL EXP/PRISON
510
224500
35
35
0
35
0
0
0
BONDED INDEBTNESS WATER 580
48692
48682
10108
.38574
48682
48722
48722
` 48722'"
!
LOAN/PRISON
�
585
60948
60948
30473
30475
60948
60948
60948
1
60948
' ±
CONTINGENCY
900
909
138.46
0
13846
13846
0
0
0
,
i
STORAGE TANK SINKING FD 910
6000
15000
0
15000
15000
15000
15000
15000/
PAGE 75

TYRRELL
COUNTY FINANCE
OFFICE FISCAL YEAR 1998-99
ANNUAL BUDGET
6/ 4/98
61 7110
WATER FUND
WATER FUND
EXPENDITURE
ACCOUNTS
PREY YEAR
C U R
R E N T
Y E A R
C O M I N G Y
E A R
1996-1997
1997-1998
1998-1999
DESCRIPTION
ACTUAL
BUDGETED
ACTUAL
ESTIMATE�ESTIM-ATE
REQUEST RECOMEND
HOARD
FEB. 28
MAR-JUN Y$AR
APPROVED
BACKHOE SINKING
FUND 910
1 0
6000
0
6000 6000
14550 14550
14550
TOTAL
7110
ws�awwoww
563311
aswassww swsssssw
384089
155721
wwwrawss swwrwsww
229536 385257
wwswwsww swwssssw
399777 392306
wsswswws
392104
i
t
t
PAGE 76
• 1

TYRRELL COUNTY FINANCE OFFICE FISCAL YEAR 1998-99 ANNUAL BUDGET 6/ 4/9'n
61 7110 WATER FUND WATER FUND SALARIES AND WAGES
DESCRIPTION
WATER SYS SUPERVISOR
3/
1/70
BRICKHOUSE JAMES D
120
5
WATER CLERK
10/
1/79
SAWYER CARLA L
120
15
WATER SYSTEM OPERATOR
12/15/92
SPENCER JOHNNY L
120
40
ASST WATER SYSTEM OPERAT
10/
2/95
NORMAN THOMAS DWAYNE
120
50
GROUNDS ATTENDANT
4/15/88
GIBBS OR WILLIAM JAMES
120
55
WATER SYSTEM POOL
0/
0/ 0
120
999
PREV YEAR
C U
R R E N T Y E A R
C O M I
N G Y
E A R
1996-1997
1997-1998
1998-1999
•
ACTUAL
BUDGETED
ACTUAL ESTIMATE ESTIMATE
REQUEST
RECOMEND
BOARD
FEB. 28 MAR -JUNK. YEAR
APPROVED'
8076
10404
10728
10728
10728
40
8868
9480
10750
9780
9780
40
24756
25332
27000
26172
26172
41
14880
15192
17250
19884
19884
40
6636
7140
8250
7368
7368
40
1200
1200
1200
40
WATER FUND
�j TOTAL WAGES AND SALARIES ' 6 0 63216 67 54 8 75178 75132 75132
TOTAL EMPLOYEES 0 0 5 5 6 6 6
i 1
PAGE 77
I
i
i

TYRRELL
COUNTY FINANCE
OFFICE FISCAL YEAR 1998-99
ANNUAL BUDGET
6/ 4/9'8
61
WATER FUND
FUND TOTALS
PREV YEAR
C U R
R E N T
Y E A
R C O M
I N G Y
E A R
1996-1997
1997-1998
1998-1999'
DESCRIPTION
ACTUAL
BUDGETED
ACTUAL
ESTIMATE
ESTIMATE REQUEST
RECOMEND
BOARD
FEB. 28
MAR-JUN',.
YEAR
APPROVED
TOTAL
REVENUES 61
563311
384089
255463
147879
403342 399777
392306
392104
TOTAL
EXPENSES 61
563311
384089
155721
229536
385257 399777
392306
392104
t
1 1
i I
i PAGE 78
.I
i

TYRRELL COUNTY FINANCE
OFFICE FISCAL
YEAR 1998-99
ANNUAL BUDGET
6/ 4/98
COUNTY WIDE
GRAND TOTALS'
PREV YEAR
1996-1997
C U
R R E N T
1997-1998
Y E A R C O M
•1998-1999
I N G Y
E A R
DESCRIPTION
ACTUAL
BUDGETED
ACTUAL
ESTIMATE. ESTIMATE REQUEST
RECOMEND
BOARD
FEB. 28
MAR-JUN" YEAR
APPROVED
TOTAL REVENUES
4525212
4578164
3022575
1618460 4641035 4433904
4399330
4418077
TOTAL EXPENSES
452.5212
4578-164
2460473
2120689 4581162 4433904
4399330
4418077
I
i
a •
I I PAGE 79

ATTACHMENT 3

PROPOSED REVERSE OSMOSIS WATER TREATMENT FACILITY
TYRRELL COUNTY
UPDATED SCOPE OF PROJECT
March 28, 2000
Northeast North Carolina relies entirely on groundwater for its potable water source. It is
getting increasingly difficult to treat groundwater through conventional methods in this
region. The shallow aquifers that require conventional treatment do. not have sufficient
quantity to meet the needs while the deeper aquifers are too brackish for conventional
treatment. For this reason, many water systems in northeastern North Carolina utilize or
are changing to reverse osmosis treatment.
Tyrrell County and its engineers have major concerns that wells drilled in the proposed
treatment facility area will experience declining water quality due to an upconing of
chlorides from lower aquifers. Our research has indicated that the additional $200,000
available from the Rural Center will provide sufficient funds to upgrade the proposed
treatment facility to a reverse osmosis facility. A reverse osmosis treatment facility will
provide the treatment technology to meet long term diminishing water quality of the
region.
The change in the project scope will be to utilize reverse osmosis treatment in lieu of
conventional pressure filtration and ion exchange softening. This also results in upsizing
the wells from 300 gpm to 400 gpm and upsizing the clearwell from 100,000 gallons to
300,000 gallons. All other design aspects remain the same.

ATTACHMENT 4

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VICINITY AND LOCATION MAP
TYRRELL CO. WATER SYSTEM IMPROVEMENTS FIGURE 1
R.O. PLANT CONCENTRATE DISCHARGE
HOBBS, UPCHURCH&ASSXCIATE�S; P.A. SCALE: DESIGNED: ETW
COAR L7W E GAESS 1 1 pp= 600 DRAWN: DCJ
X4GShE4Q, AORTH CAROUVA27969 DATE: CHECKED: ETW
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252-441-M FAX25247-2W MAY 2000 SHEET: 1 OF 4

ATTACHMENT 5

Memorandum
June 20, 2000
To: Dave Goodrich, Supervisor NPDES Permitting Unit
Thru: Roger K. Thorpe, P.E., Permitting Group Leader, WARO
Attn: Mike Templeton, Environmental Engineer
From: Al Hodge, Environmental Engineer, WARO
Date: June 20, 2000
Re: Reverse Osmosis Discharge, Tyrrell & Dare County
Please find attached a copy of a letter from Mr. Eric T. Weatherly, P.E. of
Hobbs, Upchurch & Associates, regarding the funding and the NPDES permitting of
two proposed water treatment plants. One of the proposed plants is in Tyrrell and the
other in Dare County. Mr. Weatherly indicates that in order for Tyrrell County and
the Stumpy Point Water and Sewer District (SPW&SD) to receive a Clean Water
Bond grant a permit to construct from the Public Water Supply Section (PWSS)
must be issued. In order for PWSS to issue a permit to construct a water treatment
plant a method of disposal of any reject or backwash water is required. In this case,
an NPDES permit would be required. Mr. Weatherly acknowledges that it is
impossible to process the NPDES permit application by the PWSS deadline (July 7,
2000). Mr. Weatherly has contacted Mr. Tony Chen of the Public Water Supply
Section, which has agreed that a letter from the DWQ will be adequate for PWSS to
issue a construction permit. The letter should indicate that "it is possible" for an
NPDES permit to be issued in the aforementioned cases.
I am familiar with both the Tyrrell County and Stumpy Point sites. I believe
that it is not only possible, but also likely that an RO reject water discharge from the
water treatment plants can be permitted. The Tyrrell County site would discharge
directly to Bulls Bay in the Albemarle Sound and the SPW&SD would discharge in
to Stumpy Point Bay in the Pamlico Sound.
It is recommended a letter addressing the possibility of issuing an NPDES
permit for both theses sites be sent to Mr. Weatherly.

ATTACHMENT 6

DIRECTIONAL BORE AND DISCHARGE
HEADER FOR THE REVERSE OSMOSIS
WATER TREATMENT FACILITY
CONTRACT V
TYRR.ELL COUNTY, NC
DENR SUBMITTAL
�ttt111iU1lf/!��
• S 9 6 • w
• w
..PREPARED BY
HOBBS, UPCHURCH & ASSOCIATES, P.A.
2522 S. CROATAN HIGHWAY, SUITE 2A
NAGS HEAD, NORTH CAROLINA
MAY 2000

DIRECTIONAL BORE AND DISCHARGE HEADER FOR THE
REVERSE OSMOSIS WATER TREATMENT FACILITY
TYRRELL COUNTY
SPECIAL PROVISIONS
01. The directional bore for this project is intended to avoid disturbance of the wetlands.and
to minimize disturbance of the waters of the Albemarle Sound.
The Contractor shall perform all work under this contract in accordance with conditions set forth
in the CAMA Permit.
02. Location of directional borehole shall be coordinated with and approved by the Engineer
prior to commencing boring operations.
L
'03. No vehicular traffic or construction activities are allowed in wetlands.
04. The Contractor shall restore all areas disturbed by construction activities to their original
condition.
05. The Contractor shall install a containment structure around the borehole exit to hold
excess drilling fluids and spoils. The drilling fluids and spoils shall be pumped from the
containment structure to the shore where the material will be removed and disposed of. No
drilling fluids or spoils shall be stored on site. Excess drilling fluid and spoils shall not be
discharged into sanitary or storm drain systems, ditches or waterways.
06. The Contractor shall submit details of the spoils containment structure and methods that
will be used to ensure that spoils are not discharged from the site.
07. The linear footage provided in the Bid Form is an estimate of the distance required to
avoid disturbance of the wetland areas and to locate the discharge header assembly 100' from
the edge of water.
08. The Contractor is responsible for connecting the new HDPE pipe to the existing 4" gate
valve. The Contractor shall remove the existing plug, connect to the 4" gate valve, and provide
all fittings required.
09. COMPLETION TIME: Work shall be commenced with adequate forces on the date
stipulated in the Notice to Proceed and the Project shall be fully completed within the following
times:
75 Consecutive Calendar Days
A two-year warranty period shall begin on the date of substantial completion as defined by the
General Conditions.
SP-1

If it becomes apparent that work is not proceeding to meet the project schedule, at the Owner's
request, the Contractor shall provide additional crews and/or crew members to assure
completion with the allocated time.
10. LIQUIDATED DAMAGES: If the project remains incomplete after the established
time of completion, the liquidated damages sustained by the Owner shall be $300.00 per day.
The Contractor will be liable for additional inspection costs incurred by the Owner for the time
by which contract time is exceeded.
11. SEDIMENTATION AND EROSION CONTROL: The Contractor is instructed to
control erosion and sedimentation run-off with methods approved by the Engineer during the
course of construction of this project. The Contractor shall implement approved erosion and
sedimentation control measures whenever necessary. Cost for erosion and sedimentation
control shall not be paid directly but shall be included in the line item for pipe installation in the
;Schedule of Bid Items. The Contractor is reminded that all work shall meet all applicable
requirements of the rules and regulations of Erosion and Sedimentation Control as published by
the Department of Natural Resources and Community Development, North Carolina
Sedimentation Control Commission. The Contractor shall be required to obtain written closeout
from the Land Quality Section - NCDENR.
12. SEEDING AND MULCHING: Payment for seeding and mulching the areas disturbed
during construction shall not be made directly but shall be included in the cost of the discharge
main.
13. INSTALLATION WITHIN NCDOT RIGHTS -OF -WAY: All work performed within
North Carolina Department of Transportation rights -of -way shall be performed in strict
accordance with the NCDOT Construction and Maintenance Operations Supplement to the
Manual on Uniform Traffic Control Devices. The Contractor shall be responsible for
performing the work and adhering to the Right -of -Way Encroachment Contract Special
Provisions. The Contractor shall be required to obtain written close-out from NCDOT.
14. WORK SCHEDULE: Prior to commencing work, the Contractor will submit to the
Engineer a schedule delineating the order in which the work will be performed and approximate
beginning dates for each.
15. SUBMITTALS: Approval for all shop drawings and submittals will be obtained before
the Contractor is allowed to begin work. The Contractor shall submit six sets of all shop
drawings and certification required by this Contract.
16. COMPACTION OF TRENCHES: All trenches shall be compacted to 95% density as
required by NCDOT. Any density test requested by the Engineer or NCDOT shall be paid for
by the Contractor.
17. AS -BUILT DRAWINGS AND SPECIFICATIONS AT THE JOB SITE: The
Contractor shall maintain, in readable condition at the job site, one complete set of working
SP-2

drawings and specifications for his work, including all shop drawings. Such drawings and
specifications shall be available for use by the Owner or his representative at all times. This set
shall be marked, or notes acceptable to the Engineer provided, in order to reflect as -built
conditions, changes indicating such conditions shall be kept current at all times. Upon
completion of the project, this complete set of drawings and specifications or notes, showing as -
built conditions, shall be returned to the Owner or his representative.
SP-3

DIRECTIONAL BORE AND DISCHARGE HEADER FOR THE
REVERSE OSMOSIS WATER TREATMENT FACILITY
TYRRELL COUNTY
SECTION 1
SITEWORK ON DISCHARGE
O1. SCOPE: This section shall include the clearing and grubbing of all required
construction areas together with disposal of materials, site preparation, and clean up as
specified herein.
02. SITE PREPARATION:
A. Existing Facilities: The Contractor shall provide protection for all existing
structures, buildings, and utilities against all construction activity. The Contractor shall
protect and preserve the Owner harmless against damage and claims resulting from these
activities.
B. Streets and Highways: Effective barricades, danger signals and signs on all
streets and in other locations where required for the protection of the work and the safety of
the public, shall be provided, erected and maintained by the Contractor. Barricades and
obstructions that encroach on, or are adjacent to, public rights of way shall be properly
lighted between the hours of sunset and sunrise. The Contractor shall conform to all city,
state and local laws and regulations in the use of streets and highways. The Contractor shall
be responsible for all damages occurring due to neglect or failure to meet these
requirements. When dictated by conditions that might endanger the public, a watchman
shall be provided to fulfill the requirements stated herein.
C. Traffic Flow and Continuance of Services: The work shall be arranged in a
manner that will cause a minimum of disturbance to vehicular and pedestrian traffic.
Adequate ingress and egress to both private and public property shall be provided by the
Contractor during all stages of construction. Without written approval from the city or
utility company, existing services shall not be interrupted by the construction work.
03. PRELIMINARY WORK:
A. Valuable Trees and Shrubs: When the construction work involves the
removal of valuable trees and shrubs on existing public rights of way, the work shall be
done in cooperation with the city, county, or state.
B. Protection of Private Property: The Contractor shall provide protection for
privately owned trees and shrubs bordering the right of way and shall take full responsibility
for any damage that does occur.

C. Existing roads, subject to interference by the Contractor's work, shall be kept
open in all cases. The Contractor shall provide, erect and maintain, at his own expense,
effective barricades on which shall be placed acceptable warning and/or detour signs at each
side of any road obstruction caused by the operations of the Contractor. All barricades shall
comply with OSHA requirements and State or local laws, whichever is most strenuous.
D. The Contractor shall protect all public roads which may be damaged by,
interfered with, or given undue wear by reason of the work, and shall repair or replace them
if damaged, at his own expense, to the satisfaction of governmental authorities and the
Owner.
E. When questions arise as to safe methods or suitable protection, the
Contractor shall confer with the Owner but full responsibility for results shall rest with the
Contractor.
04. DAMAGES AND COMPLAINTS
A. The Contractor shall provide protection which, in the opinion of the Owner,
will prevent damage to the property, such as lawns, roads, fences, buildings, drains, and
pipelines by passage of his equipment, and shall assume sole responsibility for damages
thereby incurred and shall notify the Owner immediately if and when damage occurs. The
Owner shall be promptly notified of all pipelines that are broken by the Contractor's
operations and immediate arrangements made for repairs. Damage to property shall be
repaired to a condition that is as good or better than original.
B. The Contractor shall promptly comply with all reasonable requests of the
landowners and tenants relative to access to right of way and to general conduct of his work;
however, he shall not enter into any agreements with property owners or tenants on other
matters such as the saving of logs or firewood or the disposal of brush without prior
approval of the Owner and Engineer. In cases of disagreement between any landowner or
tenant and the Contractor, the Contractor shall notify the Owner and Engineer immediately
and shall not perform any further operations against the objections of the property owner or
tenant without prior approval of the Owner and Engineer.
05. CLEARING AND GRUBBING: Clearing and grubbing shall be performed in areas
indicated and where required for construction. It shall include the complete removal and
disposal of all brush, weeds, timber, stumps, rubbish, and all other obstructions. All such
material shall be removed to a --depth of at least 1' below finished grade. In clearing and
grubbing areas where excavation is done, all timber, roots, or stumps removed that are
exposed by said excavation shall be removed to a depth of one foot below the excavated
surface.
06. DISPOSAL OF CLEARED AND GRUBBED MATERIAL: All refuse from the
clearing and grubbing operation shall be disposed of either by burning or removal to a dump
area that is approved by the Owner. The Contractor shall obtain a burning permit from the
city fire chief before any burning is started. Burning, if approved, shall be done in such a
K

manner that does not create hazards such as damage to existing structures, trees and
vegetation, interference with traffic and construction in progress. When the construction site
is outside the city limits and burning is required, proper permits shall be obtained from the
city, county, or state officials. All disposal by burning shall be kept under constant
supervision until all fires have been extinguished. All burning shall comply with all state
and local laws relative to the building of fires.
07. ARCHAEOLOGICAL: If the Contractor, during the prosecution of work,
encounters an unidentified archaeological or other cultural resource within the work area,
the Contractor shall immediately stop work and notify the Engineer.
08. PAYMENT: Work under this section is incidental to the work in this Contract.
A. Vegetation and Ornamental Items: The Contractor shall be fully responsible
for protection of or removal and replacement of ornamental trees, shrubs and grasses,
decorative items such as retaining walls and all other items with no additional payment or
compensation. Seeding and sodding shall be handled as outlined in Section 8.
3

DIRECTIONAL BORE AND DISCHARGE HEADER FOR THE
REVERSE OSMOSIS WATER TREATMENT FACILITY
TYRRELL COUNTY
SECTION 2
PIPE FOR DISCHARGE
01. SCOPE: This specification covers high density polyethylene (PE 3408) pressure
pipe intended for the transportation of reverse osmosis treatment plant concentrate
discharge.
y.
Unless otherwise noted, the materials listed below are acceptable to the Owner for use.
Should the Contractor desire to use other materials not listed in these specifications, written
permission must be obtained from the Owner's Engineer.
All material shall be free from defects impairing strength and durability and be of the best
commercial quality for the purposes specified. It shall have structural properties sufficient
to safely sustain or withstand strains and stresses to which it is normally subjected and be
true to detail.
02. SUBMITTALS: The Contractor shall submit to the Engineer six (6) copies of all
submittal data for review and/or approval. Submittals shall include at a minimum: (1) the
manufacturer's name, (2) type of material, (3) ASTM, ANSI, AWWA or other quality
standard and (4) pressure class. If the materials do not meet the quality standards specified,
the submittals will be rejected and other materials submitted as specified. The Contractor
must obtain approval of all pipe materials prior to commencing construction.
The Contractors shall submit to the Engineer two (2) copies of a certificate of inspection
from the pipe manufacturer that the pipe supplied has been inspected at the plant and meets
the requirements of these specifications.
03. PIPE DELIVERY, STORAGE AND HANDLING: Units shall be delivered,
handled, and maintained in a manner to avoid damage to the pipe. The pipe shall be stored
in an open area on high, well -drained land not subject to flooding, mud, or other means of
contamination.
4

04. HIGH DENSITY POLYETHYLENE PIPE:
A. General: Materials used for the manufacturing of polyethylene pipe and
fittings shall be PE 3408 High Density Polyethylene (HDPE) meeting the ASTM D3350
cell classification of 345434C.
The material used in the production of potable water pipe shall be approved by the National
Sanitation Foundation (NSF).
B. Pipe Thickness: The material shall have a minimum Hydrostatic Design
Basis (HDB) of 1600 psi at 73T when tested in accordance with PPI TR-3 and shall be
listed in the name of the pipe and fitting manufacturer in PPI TR-4.
Polyethylene pipe shall be manufactured in accordance with AWWA C906 for sizes 4"
through 54".
Permanent identification of piping service shall be provided by co -extruding longitudinal
blue stripes into the pipe's outside surface. The striping material shall be the same material
as the pipe material except for color.
C. Joints: Butt fusion or Electrofusion welded in accordance with ASTM
D3261.
D. Marking: The net weight, pressure class or nominal thickness, sampling
period and manufacturer shall be marked on each pipe.
05. METHOD OF MEASUREMENT: Pipe shall be measured per linear foot, complete
in place and accepted, including the furnishing of all labor, tools, materials, and equipment
necessary for trenching, laying, jointing, testing, backfilling, connections to existing mains,
and all other necessary incidentals.
06. PAYMENT: Payment shall be made at the contract unit price on items measured as
described above.
5

DIRECTIONAL BORE AND DISCHARGE HEADER FOR THE
REVERSE OSMOSIS WATER TREATMENT FACILITY
TYRRELL COUNTY
SECTION 3
GUIDED BORING INSTALLATION
01. GENERAL:
A. Scope: This section includes the installation of the discharge main by guided
.boring, including connecting to the existing discharge main. The Contractor will furnish all
labor, components, materials, tools, and appurtenances necessary or proper for the
;performance and completion of the contract.
B. General Description of Method: Guided boring is a method of trenchless
construction using a surface launched steerable drilling tool controlled from a mobile
drilling frame, and includes a field power unit, mud mixing system and mobile spoils
extraction system. The drilling frame is sited and aligned to bore a pilot borehole that
conforms to the planned installation of the main. The drilling frame is set back from an
access pit that has been dug (typically at the location of a proposed manhole or other
appurtenance) and a high-pressure fluidjet toolhead that uses a mixture of bentonite clay and
water is launched. Pits are normally dug at the start point and endpoint of the proposed pipe
installation and are used to align the toolhead, attach other equipment, and to collect and
remove excess spoils. Using an electronic guidance system, the toolhead is guided through
the soil to create a pilot borehole. Upon reaching the endpoint joint, the toolhead is removed
and a reamer with the product pipe attached is joined to the drill string and pulled back
through the borehole. In large diameter installations, pre -reaming of the borehole will
usually be done prior to attaching the product pipe for the final pullback. A vacuum spoils
extraction system removes any excess spoils generated during the installation. The
connections, manholes, or other appurtenances are then completed at both the start point and
endpoint locations and the surface restored to its original condition.
C. Qualifications:
1. Guided boring Contractors will have actively engaged in the
installation of pipe using guided boring for a minimum of three years.
2. Field supervisory personnel employed by the Guided Boring
Contractor will have at least three years experience in the performance of the work and tasks
as stated in the contract document.
6

D. Submittals:
1. Submit documentation showing three years of guided boring
experience. Information must include, but not be limited to, date and duration of work,
location, pipe information (i.e., length, diameter, depth of installation, pipe material, etc.),
project owner information, (i.e., name, address, telephone number, contact person), and
the contents handled by the pipeline (water, wastewater, etc.).
2. Submit a list of field supervisory personnel and their experience
with guided boring operations. At least one of the field supervisors listed must be at the
site and be responsible for all work at all times when guided boring operations are in
progress. Guided boring operations will not proceed until the resume(s) of the
Contractor's field supervisory personnel have been received and reviewed by the Project
��ngineer.
3. Submit the following drawings and documents:
a. Working drawings and written procedure describing in
detail the proposed method of installation. This will include, but not be limited to, size,
capacity and setup requirements of equipment; location and siting of drilling and
receiving pits; dewatering if applicable; method of fusion and type of equipment for
joining pipe; type of cutting tool head; and method of monitoring and controlling line and
depth. If the Contractor determines that modifications to the method and equipment as
stated in the submittal is necessary during construction, the contractor will submit a plan
describing such modifications, including the reasons for the modification.
b. Bentonite drilling mud products information (MSDS);
special precautions necessary; method of mixing and application; and method of
removing spoils.
E. Site Conditions:
1. Drilling operations must not interfere with, interrupt, or endanger
surface and activity upon the surface.
2. Contractor must comply with all applicable jurisdictional codes
and OSHA requirements.
3. When rock stratum, boulders, underground obstructions, or other
soil conditions that impede the progress of drilling operations are encountered, the
Contractor and Engineer shall review the situation and jointly determine the feasibility of
continuing drilling operations, making adjustments or switching to an alternative
construction method.

02. MATERIALS:
A. Material requirements:
1. Pipe and fittings.
a. High Density Polyethylene Pipe (HDPE) and fittings will
be used in accordance with the materials specifications. All additional appurtenances
such as tees, gaskets, flange adaptors, etc. will meet the material specifications. The
Contractor will supply the pipe and fittings and will include its price in the bid. All pipe
installed by guided boring will be joined by an approved butt fusion or electrofusion
technique according to the manufacturers specifications.
b. HDPE pipe shall be produced from resins with a material
designation PE3408, and a cell classification PE334434 as specified within ASTM
p3350, and dimensions and workmanship as specified by ASTM F714. It will also meet
the requirements of AWWA ASTM D3350. Pipe will be legibly marked at intervals of
no more than five feet with the manufacturer's name, trademark, pipe size, HDPE cell
classification, appropriate legend such as SDR 11, ASTM D3035, AVWVA C901 or
C906, date of manufacture and point of origin. Pipe not marked as indicated above will
be rejected.
2. Drilling fluid.
a. Drilling fluid will be a mixture of water and bentonite clay.
The fluid will be inert. The fluid should remain in the tunnel to ensure the stability of the
tunnel, reduce drag on the pulled pipe, and provide backfill with the annulus of the pipe
and tunnel.
b. Disposal of excess drilling fluid and spoils will be the
responsibility of the Contractor who must comply with all relevant regulations, right-of-
way, work space and permit agreements. Excess drilling fluid and spoils will be disposed
at an approved location. The Contractor is responsible for transporting all excess drilling
fluid and spoils to the disposal site and paying any disposal costs. Excess drilling fluid
and spoils will be transported in a manner that prevents accidental spillage onto
roadways. Excess drilling fluid and spoils will not be discharged into sanitary or storm
drain systems, ditches or waterways.
C. Drilling fluid returns (caused by fracturing of formations)
at locations other than the entry and exit points will be minimized. The Contractor will
immediately clean up any drilling fluid that surfaces through fracturing.
d. Mobile spoils removal equipment capable of quickly
removing spoils from entry or exit pits and areas with returns caused by fracturing will be
present during drilling operations to fulfill the requirements of paragraphs b and c above.
8

e. The Contractor will be responsible for making provisions
for a clean water supply for the mixing of drilling fluid.
03. EXECUTION:
A. General:
1. The Engineer shall be notified immediately if any obstruction is
encountered that stops the forward progress of drilling operations.
2. Dewatering of pits and excavations must meet the general
provisions and specifications for new water main construction in effect at Dare County.
The type of dewatering method will be at the option of the Contractor. When water is
encountered, the Contractor must provide a dewatering system of sufficient capacity to
remove water, keeping any excavations free of water until the backfill operation is in
progress. Dewatering shall be performed in a manner that removal of soil particles is
held to a minimum.
B. Preparation:
1. Excavate required pits in accordance with the working drawings.
2. The drilling procedures and equipment shall provide protection of
workers, particularly against electrical shock. As a minimum, grounding mats, grounded
equipment, hot boots, hot gloves, safety glasses, and hard hats shall be used by crew
members. The drilling equipment shall have an audible alarm system capable of
detecting electrical current.
3. Removal of trees, landscaping, pavement, or concrete shall be
performed as specified.
C. Guided Boring Operations:
1. Equipment.
a. The drilling equipment must be capable of placing the pipe
within the limits indicated on the contract plans.
b. Guided boring equipment shall consist of a surface
launched steerable drilling tool controlled from a mobile drilling frame, and include a
field power unit, mud mixing system and mobile spoils extraction system.
C. The number of access pits shall be kept to a minimum and
the equipment must be capable of boring the following lengths in a single bore. The
guided boring system will have the capability of boring and installing a continuous run
without intermediate pits of a minimum distance for the following pipe diameters:

Product Pipe Size Minimum Boring Distance
1-1 % inches 500 feet
2 — 4 inches 450 feet
6 inches 400 feet
8 inches 350 feet
10 —16 inches 300 feet
d. The guidance system shall have the capability of measuring
vertical (depth) position, horizontal position and roll. The guidance system must meet
the following specifications in soft homogenous soils:
Contractor and
"Submittals."
Accuracy
Vertical position: ± 1 inch at
18-96
inches of depth
± 2 inches at
97-144
inches of depth
± 4 inches at
145-180
inches of depth
± 6 inches at
181-300
inches of depth
± 10 inches at 301-480
inches of depth
Horizontal position: ± 2 inches at 18-96 inches of depth
± 4 inches at 97-144 inches of depth
± 6 inches at 145-180 inches of depth
± 12 inches at 181-300 inches of depth
± 24 inches at 301-480 inches of depth
e. Equipment set-up requirements shall be prepared by the
submitted to the Engineer per the requirements as stated under
f. Required Safety Equipment: During drilling operations, all
equipment shall be effectively grounded and incorporate a system that protects operating
personnel from electrical hazards. The system shall be equipped with an audible alarm
that can sense if contact is made with an energized electric cable. Proper operation of the
alarm system will be confirmed prior to the drilling of each tunnel. All equipment will be
connected to ground with a copper conductor capable of handling the maximum
anticipated fault current. Crew members operating drilling equipment and handling rods
will do so while standing on grounded wire mesh mats, ensuring that all equipment is
grounded, and wearing hot boots, hot gloves, safety glasses and hard hats. Crew
members operating handheld locating equipment will wear hot boots.
g. Equipment set-up requirements and locations shall be
determined by the Contractor and submitted to the Engineer per the requirements as
stated under "Submittals."
10

2. Pilot Hole Boring.
a. The entry angle of the pilot hole and the boring process will
maintain a curvature that does not exceed the allowable bending radii of the product pipe.
b. Alignment Adjustments and Restarts.
(1) The Contractor shall follow the pipeline alignment
as shown on the Drawings, within the specifications stated. If adjustments are required,
the Contractor shall notify the Engineer for approval prior to making the adjustments.
3. Installing Product Pipe
a. After the pilot hole is completed, the Contractor shall
install a swivel to the reamer and commence pullback operations. Pre -reaming of the
tunnel may be necessary and is at the option of the Contractor.
b. Reaming diameter will not exceed 1.5 times the diameter of
the product pipe being installed.
C. The product pipe being pulled into the tunnel will be
protected and supported so that it moves freely and is not damaged by stones and debris
on the ground during installation.
d. Pullback forces will not exceed the allowable pulling forces
for the product pipe.
e. The Contractor shall allow sufficient lengths of product
pipe to extend past the termination point to allow connections to the diffuser assembly.
Pulled pipe will be allowed 24 hours of stabilization prior to making tie-ins. The length
of extra product pipe will be at the Contractor's discretion.
D. Clean-up: The Contractor shall maintain the work site in a neat and
orderly condition throughout the period of work and after completing the work at each
site, remove debris, surplus material and temporary structures erected by the Contractor.
The site shall be restored to a condition equal to the existing condition prior to being
disturbed.
11

DIRECTIONAL BORE AND DISCHARGE HEADER FOR THE
REVERSE OSMOSIS WATER TREATMENT FACILITY
TYRRELL COUNTY
SECTION 4
SLIP-ON DIFFUSER CHECK VALVES
01. SCOPE: This section shall include the furnishing of four (4) Diffuser Check Valves
as shown on the drawings and specified herein.
02. SUBMITTALS:
A. Submit six (6) copies of product literature that includes information on the
performance and operation of the valve, materials of construction, dimensions and weights,
elastomer characteristics, flow data, headloss data, jet velocity data, and pressure ratings.
B. Provide shop drawings that clearly identify the valve dimensions.
03. QUALITY ASSURANCE:
A. Supplier shall have at least ten (10) years experience in the manufacture of
"duckbill" style elastomeric valves, and at least five (5) years experience with diffuser
applications, and shall provide references and a list of installations upon request.
04. "DUCKBILL" ELASTOMERIC DIFFUSER VALVES:
A. Diffuser Check Valves are to be all rubber of the flow operated check type
with a slip-on connection. The Check Valve is designed to slip over the specified pipe
outside diameter and attached by means of vendor famished stainless steel clamps. The port
area shall contour down to a duckbill which shall allow passage of flow in one direction
while preventing reverse flow. The flange and flexible duckbill sleeve shall be one-piece
rubber construction with nylon reinforcement.
B. The Diffuser Check Valves shall provide a variable orifice nozzle to
minimize variation in jet velocity with flow. The jet velocity vs. flow characteristics shall
follow a non -linear curve which maximizes jet velocity at low flow rates compared to fixed
orifice nozzles. Manufacturer shall have flow test data on diffuser check valves obtained by
an independent test facility verifying pressure drop and jet velocity vs. flow.
C. Company name, plant location, valve size, and serial number shall be bonded
to outside of the check valve. Valves shall be manufactured in the USA.
12

05. FUNCTION:
A. When line pressure inside the valve exceeds the backpressure outside the
valve by a certain amount, the line pressure forces the bills of the valve open, allowing flow
to pass. This restriction causes an increase in the jet velocity of the discharge, while the
shape of the opening creates a flattened plume -shaped discharge pattern to increase
dispersion. When backpressure exceeds the line pressure by at the same amount, the bills of
the valve are forced closed.
06. MANUFACTURER:
A. All valves shall be of the Series TF-D as manufactured by the Red Valve
Co., Inc. of Carnegie, PA 15106 or approved equal.
07. INSTALLATION:
A. Valve shall be installed in accordance with manufacturer's written
installation and Operation Manual and approved submittals.
08. MANUFACTURER'S CUSTOMER SERVICE:
A. Manufacturer's authorized representative shall be available for customer
service during installation and start-up, and to train personnel in the operation, maintenance
and troubleshooting of the valve.
B. Manufacturer shall also make customer service available directly from the
factory in addition to authorized representatives for assistance during installation and start-
up, and to train personnel in the operation, maintenance and troubleshooting of the valve.
13

J
BULL BAY
REVERSE OSMOSIS PLANT
CONCENTRATE DISCHARGE
4" PVC DISCHARGE MAIN
TYRRELL COUNTY WTF
loO
SR
VICINITY AND LOCATION MAP
TYRRELL CO. WATER SYSTEM IMPROVEMENTS FIGURE 1
R.O. PLANT CONCENTRATE DISCHARGE
HOBBS, UPCHURCH&ASSOCIATES, P.A. SCALE: DESIGNED: ETW
COVE AG B EW 1 600' DRAWN: DCJ
NAGS hE4fl, NORTH CAROLINA 279M DATE: CHECKED: ETW
2522 S CROATAN HWY, SUO2A MAY 2000
252-44 -3W FAX [phone]VO SHELM 1 OF 4

4" PVC DISCHARGE MAIN
'
(CONTRACT III BY OTHERS)
j EXISTING RIPRAP
BULKHEAD
•• ••••••••• �� ••.
'��, p•Q-��E� •'L9
EDGE OF WATER
SEAL _
14996
BULL BAY
I
< = 10
.. •4 100'
20' UTILITY
EASEMENT STA. 0+00 DISCHARGE
WATER MAIN
•� BEGIN 125' 4" HDPE
DIRECTIONAL BORE
A
STA. 0+00
PLAN
REMOVE EX. 4" PLUG
TIE
0 EX
STIN
5
- --
4" G
&JE
VALV
5
\,,EXISTING
GRADE
APPR
X.
MW
=3.
'
0
0
=
-5
' MI
COVER\-4?
DIS
HAR
E HEADER
-5
EW
25L
HDRE
IREC
ION
L BORE
P
PE
-10
1
-10
0+00 1 +00
2+00
PROFILE
TYRRELL CO. WATER SYSTEM IMPROVEMENTS
FIGURE 2
R.O. PLANT CONCENTRATE DISCHARGE
HOBBS, UPC HURCH & ASSX1A TES, P.A.
SCALE: 1 _ 50' (H)
DESIGNED: ETW
DRAWN: DCJ
COAMWB' NSW
1 „=5' (V)
NAGSkAQ NORNCAROUVA 27959
lqj
DATE:
CHECKED: ETW
222S CROATAN HWY, SWE2A
252�-44�-3W FAX[phone];00
MAY 2000
SHEET: 2 0F 4

10'
CONCRETE
ANCHOR
I 3
6"
4" HDPE DIRECTIONAL
BORE PIPE
3" DIFFUSER CHECK VALVES H
(4 TOTAL)
PLAN
2-XI/4- S.S. STRAP W/
6"X3/4" S.S. ANCHOR BOLTS.
WASHERS & NUTS
NOTE
PROVIDE NEOPRENE PADS BETWEEN S.S. STRAPS AND HDPE PIPE
AND BETWEEN CONCRETE ANCHOR AND HDPE PIPE.
18"
12" HDPE DIFFUSER
MANIFOLD
15' TYP
OOSTNG GRADE
4" HDPE DIRECTIONAL
BORE PIPE
SECTION A —A
4" W HDPE A
MITTERED ELL HDPE END CAP
3— — — — — —
30' II �'.. s Ik
4" HDPE DIRECTIONAL
BORE PIPE
EXISTING GRADE
14FAL
996
ELEVATION
T WEa
s/74 4" DISCHARGE HEADER DETAIL
TYRRELL CO. WATER SYSTEM IMPROVEMENTS FIGURE 3
R.O. PLANT CONCENTRATE DISCHARGE
hM,, U ICHURCH& AS50�CG4 TES, P�4. SCALE: DESIGNED: ETW
GYiLTirIK3� �2,-0,DRAWN: DCJ
W S�� NORTH CAROM VW DATE: CHECKED: ETVII
25122S CROATAN M�i�1; ME24 MAY 2000
' 4�= FAX 2a2-441-20 SHEET: 3 OF 4

CONSTRUCTION NOTES
AND SPECIFICATIONS
1. LOCATION OF DIRECTIONAL BOREHOLE SHALL BE COORDINATED WITH
AND APPROVED BY THE ENGINER PRIOR TO COMMENCING BORING
OPERATIONS.
2. NO VEHICULAR TRAFFIC OR CONSTRUCTION ACTIVITIES ARE ALLOWED
IN THE WELANDS BETWEEN RIPRAP AND THE EDGE OF WATER.
3. THE CONTRACTOR SHALL RESTORE ALL AREAS DESTURBED BY
CONSTRUCTION ACTIVITIES TO THEIR ORIGINAL CONDITIONS.
4. THE CONTRACTOR SHALL INSTALL A 10' X 10' CONTAINMENT FENCE
AROUND THE BOREHOLE TO HOLD EXCESS DRILLING FLUID AND
SPOILS. THE DRILLING FLUIDS AND SPOIL SHALL BE PUMPED FROM
THE CONTAINMENT STRUCTURE TO THE SHORE, WHERE THE MATERIAL
WILL BE REMOVED AND DISPOSED OF. NO DRILLING FLUIDS OR SPOILS
SHALL BE STORED ON SITE. EXCESS DRILLING FLUID AND SPOILS
SHALL NOT BE DISCHARGED INTO SANITARY OR STORM DRAIN
SYSTEMS, DITCHES OR WATERWAYS.
5. THE PIPE FOR THE DIRECTIONAL BORE SHALL BE HIGH DENSITY
POLYETHYLENE (PE 3408) DR11 IN ACCORDANCE WITH AWWA C906.
FITTINGS SHALL BE BUTT TYPE FITTINGS AND SHALL CONFORM TO
AWWA 906 AND SHALL BE BUTT FUSION WELDED TO THE PIPE IN
ACCORDANCE WITH ASTM D3261.
6. DIFFUSER CHECK VALVES SHALL BE FLOW OPERATED ALLOWING FLOW
IN ONE DIRECTION. THE VALVE SHALL BE OF ALL ONE-PIECE RUBBER
CONSTRUCTION WITH NYLON REINFORCEMENT. THE DIFFUSER CHECK
VALVE SHALL CONNECT TO THE DISCHARGE HEADER BY SLIPING OVER
THE DIFFUSER PORT ATTACHED WITH STAINLESS STEEL CLAMPS. THE
DIFFUSER CHECK VALVES SHALL BE AS MANUFACTURED BY THE RED
VALVE CO. OR APPROVED EQUAL.
7. CONCRETE ANCHORS SHALL BE CAST OFF -SITE AND SHALL HAVE A
MINIMUM COMPRESSIVE STRENGTH OF 3,000 PSI. THE ANCHORS
SHALL BE SHIPPED TO THE FINAL LOCATION AND PLACED IN HAND
EXCAVATED TRENCHES. NO MECHANICAL EXCAVATING EQUIPMENT
SHALL BE USED.
TYRRELL CO. WATER SYSTEM IMPROVEMENTS
R.O. PLANT CONCENTRATE DISCHARGE
HOBBS,, UPCHURCH&ASSOCIATES, PA
lqj NAGS ",, lVff H CMLWA 2/W
259 a CROATANW,, SUff V
22-44,h= FAX 22 441-M
SCALE:
NONE
DATE:
MAY 2000
SEAL
14996
FIGURE 4
DESIGNED: ETW
DRAWN: DCJ
CHECKED: ETW
SHEET: 4 OF 4

ATTACHMENT 7

P r
ar North Carolina State University is .;,jnd- - Office of Finance and Business
grant university and a constituent institution Facilities Division
of The University of North Carolina
An Equal Opportunity/Affirmative Action Employer Real Estate
Campus Box 7230 / Primrose Hall
Raleigh, North Carolina 27695-7230
July 12, 2000
i&. .rr T. i . "i viWvusv
County Administrator
Tyrrell County
P. O. Box 449
Columbia, N.C. 27925
i
Re: Brine Discharge Line Easement
Dear Mr. Brickhouse:
919.515.3235 (phone)
919.515.8426 (fax)
An easement at the 4-H Environmental Education and Conference Center in Tyrrell County
was approved by the Council of State at its meeting held on July 11, 2000 for your
installation of the brine discharge line to the sound from the planned Reverse Osmosis
Water Plant to be constructed adjacent to the Center. This non-exclusive easement will be
10 feet wide with an additional 10-foot temporary easement provided during construction.
The enclosed map shown as "Exhibit A" provides the general routing of this line.
Preparation of the easement document will be coordinated with the State Property Office.
A centerline survey of the easement including metes and bounds legal description will be
required from Tyrrell County for inclusion in this document. Please work with Mr. Floyd
Williams, Construction Project Manager of the 4-H Center, on the specific routing along
the property boundary for this survey. His telephone number is [phone]. Also, as
discussed in our earlier meeting and as a condition of this easement, the RO plant and
associated facilities must be screened from direct view from the 4-H Center. I will forward
a copy of the draft easement upon completion.
If you have any questions regarding this easement, please give me a call.
Sincerely,
fr'A
Howard Harrell <—
Director, Real Estate
Enclosure
cc: Charles Leffler
Floyd Williams
s1--3e,
��- 2,4Z�
5 A it
0%.A.)'tNrA
Ok . cA tA

EXHIBIT A
. • 13 •
J!/f 21 „
i C - /•,r
I i �
� - ..ram------- -----= •�+rd'Qoaeial S---- --------- ------
II
ua lira try Its er M03TA
i lt>u ,
rl r•, 1
Alraal• f t • � r • 1, j /
Dasaso.3ldg b��sa .M V
PROPOSED
t / DISCHARGE LINE
y 1
EASEMENT
TYRRELL COUNTY
REVERSE OSMOSIS WATER PLANT
' BRINE DISCHARGE LINE EASEMENT
4-H
ENVIRONMENTAL
`• 1 EDUCATION and
I CONFERENCE CENTER
m m touNn, Nor, ri CARoU:,4
+'•� „ S'K Qs6TWCf01 a rA?•NQ4'
NORTH CAROLINA
' STATE UNIVERSITY
4-H AND YOUTH
a
DEVELOPMENT
{ irA. =Ox 7ft+5
. .. UWGK, NORTH CAtOUNA ITdrfS

STATE OF NORTH CAROLINA
COUNTY OF TYRRELL
DRAFT
7-12-00
THIS NON-EXCLUSIVE EASEMENT, made and entered into this the day of
. 2JOQ, by and �erireea the STATE OF NORTH CART OL ENTA, a body polifsc and _
corporate, hereinafter referred to as GRANTOR, and the COUNTY OF TYRRELL, hereinafter
referred to as GRANTEE:
WITNESSETH:
THAT, WHEREAS, North Carolina State University has authorized and approved the
execution of this instrument for the purposes herein expressed; and,
WHEREAS, the execution of this instrument for and on behalf of the State of North
Carolina has been duly approved by the Council of State by resolution adopted at a meeting held
in the City of Raleigh, North Carolina, on the 11 ' day of July, 2000.
NOW, THEREFORE, in consideration of the sum of $1.00, the receipt of which is hereby
acknowledged, the Grantor does hereby grant unto Grantee, its successors and assigns, the right,
privilege and easement to construct, operate and maintain an underground brine water discharge
line across the lands of Grantor know as 4-H Environmental Education and Conference Center
from the reverse osmosis water plant to be constructed adjacent to the 4-H Center in Tyrrell
County and said easement being ten (10) foot wide with a ten (10) foot wide temporary
construction easement, and as more specifically described as follows:
[INSERT METES AND BOUNDS DESCRIPTION or
Recorded Map Reference]
IT IS UNDERSTOOD AND AGREED BETWEEN THE GRANTOR AND GRANTEE:
1. That the Grantee shall have the right to go in and upon said premises to construct,
reconstruct, repair, alter, inspect, and maintain, an underground pipeline for a
brine water discharge. The Grantee may further remove and keep removed from
the easement area any trees, shrubbery or other vegetation, to maintain and
operate said underground brine water discharge line for the aforesaid purpose.
2. That the Grantor may use said right of way and easement area for all purposes not
inconsistent with the rights herein granted.

3. That the Grantee agrees to restore and maintain the right of way area after
installation or any repairs of the said underground discharge line. This includes
the prevention of erosion of the soil, the protection of water quality, and the use of
generally accepted landscape methods
.4:...,.t That,it is understood and agrCcd that ties couveyarlcc is made subject to the
condition that the Grantee shall properly obtain all necessary permits required by
State and federal law. Failure to obtain such permits in a timely manner shall be
deemed an abandonment of said easement.
5. That it is understood that as a condition of this easement, the Grantee, upon
completion of the reverse osmosis plant and associated facilities, and prior to its
operation, shall screen the reverse osmosis plant and associated facilities from
direct view from the 4-H Environmental Education and Conference Center. A
plan for this screening will be provided to Grantor for review and prior written
approval before installation of brine discharge line.
6. That by acceptance of this easement, the Grantee binds itself and its successors,
agents and assigns to the foregoing conditions.
TO HAVE AND TO HOLD the aforesaid rights, privileges and easements unto said
Grantee, its successors and assigns, for so long as Grantee maintains said underground discharge
line and no longer.
IN TESTIMONY WHEREOF, the STATE OF NORTH CAROLINA has caused this
instrument to be executed in its name by JAMES B. HUNT, JR., Governor, attested by ELAINE
F. MARSHALL, Secretary of State, and the Great Seal of the State of North Carolina to be
hereto affixed by virtue of the power and authority aforesaid.
ATTEST:
M
STATE OF NORTH CA.ROLINA
2
Governor

1.
a
Secretary of State
APPROVED AS TO FORM:
MICHAEL F. EASLEY
ATTORNEY GENERAL
By
STATE OF NORTH CAROLINA
COUNTY OF WAKE
a Notary Public in and for the County and
State aforesaid, do hereby certify that ELAINE F. MARSHALL, Secretary of State of North
Carolina, personally appeared before me this day and acknowledged that she is Secretary of State
of North Carolina, and that by authority duly given and as the act of the State, the foregoing
instrument was signed in its name by JAM ES B. HUNT, JR., Governor of the State of North
Carolina, sealed with the Great Seal of the State of North Carolina, and attested by herself as
Secretary of State of North Carolina.
IN WITNESS WHEREOF, I have hereunto set my hand and Notarial Seal, this the
day of 32000.
My Commission Expires:
3
Notary Public

ATTACHMENT 8

PRESENT VALUE COST ANALYSIS
v
Capital Cost
1. 4" PVC Discharge Pipe
4,400 LF @ $10.00/LF
2. 4" Directional Bored Discharge Pipe
150 LF @ $150.00/LF
3. Discharge Header Assembly
LS @ $10,000
Total Construction
Engineering (15%)
Contingencies
Recurring Costs
Operation and Maintenance
(replacement costs)
Laboratory Costs
Operator and Support Staff Costs
Residual Disposal Costs
Connection and Subsequent User Fees
Permit and Compliance Fee
Utility Costs
$ 44,000
$ 22,500
$ 76,500
$ 11,475
$ 7,650
$ 95,625
$3,060/year
$1,200 - $4,000/year
N/A
N/A
N/A
$400/year
N/A
$7,460

Present Value of Costs
D
PV—Co+C (1+r)" —1
r(1 + r)"
PV = 7,460 + 73,460 (1 + 0)2s 251
0(1 + 0)
PV = $7,460
Note: r = 0 because the project is funded by a grant

M
^
DIRECTIONAL BORE AND DISCHARGE
HEADER FOR THE REVERSE OSMOSIS
WATER TREATMENT FACILITY
CONTRACT V
TYRRELL COUNTY, NC
DENR SUBMITTAL
on
no
S /zZtcU
ON
PREPARED BY
.o
HOBBS, UPCHURCH & ASSOCIATES, P.A.
2522 S. CROATAN HIGHWAY, SUITE 2A
NAGS HEAD, NORTH CAROLINA _
MAY 2000 �j l
MAY 30
UENR - WATER QUALITY
- ROIHT SM-!RCE BRANCH

DIRECTIONAL BORE AND DISCHARGE HEADER FOR THE
REVERSE OSMOSIS WATER TREATMENT FACILITY
TYRRELL COUNTY
SPECIAL PROVISIONS
O1. The directional bore for this project is intended to avoid disturbance of the wetlands and
to minimize disturbance of the waters of the Albemarle Sound.
The Contractor shall perform all work under this contract in accordance with conditions set forth
in the CAMA Permit.
02. Location of directional borehole shall be coordinated with and approved by the Engineer
prior to commencing boring operations.
03. No vehicular traffic or construction activities are allowed in wetlands.
04. The Contractor shall restore all areasdisturbed by construction activities to their original
condition.
O5. The Contractor shall install a containment structure around the borehole exit to hold
excess drilling fluids and spoils. The drilling fluids and spoils shall be pumped from the
containment structure to the shore where the material will be removed and disposed of. No
drilling fluids or spoils shall be stored on site. Excess drilling fluid and spoils shall not be
discharged into sanitary or storm drain systems, ditches or waterways.
06. The Contractor shall submit details of the spoils containment structure and methods that
will be used to ensure that spoils are not discharged from the site.
07. The linear footage provided in the Bid Form is an estimate of the distance required to
avoid disturbance of the wetland areas and to locate the discharge header assembly 100' from
.. the edge of water.
08. The Contractor is responsible for connecting the new HDPE pipe to the existing 4" gate
-� valve. The Contractor shall remove the existing plug, connect to the 4" gate valve, and provide
all fittings required.
09. COMPLETION TIME: Work shall be commenced with adequate forces on the date
stipulated in the Notice to Proceed and the Project shall be fully completed within the following
times:
75 Consecutive Calendar Days
A two-year warranty period shall begin on the date of substantial completion as defined by the
General Conditions.
SP-1

If it becomes apparent that work is not proceeding to meet the project schedule, at the Owner's
request, the Contractor shall provide additional crews and/or crew members to assure
completion with the allocated time.
10. LIQUIDATED DAMAGES: If the project remains incomplete after the established
time of completion, the liquidated damages sustained by the Owner shall be $300.00 per day.
The Contractor will be liable for additional inspection costs incurred by the Owner for the time
.. by which contract time is exceeded.
11. SEDIMENTATION AND EROSION CONTROL: The Contractor is instructed to
.. control erosion and sedimentation run-off with methods approved by the Engineer during the
course of construction of this project. The Contractor shall implement approved erosion and
sedimentation control measures whenever necessary. Cost for erosion and sedimentation
control shall not be paid directly but shall be included in the line item for pipe installation in the
Schedule of Bid Items. The Contractor is reminded that all work shall meet all applicable
requirements of the rules and regulations of Erosion and Sedimentation Control as published by
the Department of Natural Resources and Community Development, North Carolina
Sedimentation Control Commission. The Contractor shall be required to obtain written closeout
from the Land Quality Section - NCDENR.
12. SEEDING AND MULCHING: Payment for seeding and mulching the areas disturbed
during construction shall not be made directly but shall be included in the cost of the discharge
main.
13. INSTALLATION WITHIN NCDOT RIGHTS -OF -WAY: All work performed within
North Carolina Department of Transportation rights -of -way shall be performed in strict
accordance with the NCDOT Construction and Maintenance Operations Supplement to the
Manual on Uniform Traffic Control Devices. The Contractor shall be responsible for
performing the work and adhering to the Right -of -Way Encroachment Contract Special
Provisions. The Contractor shall be required to obtain written close-out from NCDOT.
14. WORK SCHEDULE: Prior to commencing work, the Contractor will submit to the
Engineer a schedule delineating the order in which the work will be performed and approximate
beginning dates for each.
15. SUBMITTALS: Approval for all shop drawings and submittals will be obtained before
the Contractor is allowed to begin work. The Contractor shall submit six sets of all shop
drawings and certification required by this Contract.
16. COMPACTION OF TRENCHES: All trenches shall be compacted to 95% density as
required by NCDOT. Any density test requested by the Engineer or NCDOT shall be paid for
by the Contractor.
17. AS -BUILT DRAWINGS AND SPECIFICATIONS AT THE JOB SITE: The
Contractor shall maintain, in readable condition at the job site, one complete set of working
SP-2

r
drawings and specifications for his work, including all shop drawings. Such drawings and
specifications shall be available for use by the Owner or his representative at all times. This set
shall be marked, or notes acceptable to the Engineer provided, in order to reflect as -built
conditions, changes indicating such conditions shall be kept current at all times. Upon
completion of the project, this complete set of drawings and specifications or notes, showing as-
r built conditions, shall be returned to the Owner or his representative.
r
r
SP-3

ram
go
DIRECTIONAL BORE AND DISCHARGE HEADER FOR THE
REVERSE OSMOSIS WATER TREATMENT FACILITY
TYRRELL COUNTY
ON SECTION 1
SITEWORK ON DISCHARGE
Im
01. SCOPE: This section shall include the clearing and grubbing of all required
construction areas together with disposal of materials, site preparation, and clean up as
specified herein.
02. SITE PREPARATION:
A. Existing Facilities: The Contractor shall provide protection for all existing
structures, buildings, and utilities against all construction activity. The Contractor shall
�■+ protect and preserve the Owner harmless against damage and claims resulting from these
activities.
F+ B. Streets and Highways: Effective barricades, danger signals and signs on all
streets and in other locations where required for the protection of the work and the safety of
the public, shall be provided, erected and maintained by the Contractor. Barricades and
obstructions that encroach on, or are adjacent to, public rights of way shall be properly
lighted between the hours of sunset and sunrise. The Contractor shall conform to all city,
state and local laws and regulations in the use of streets and highways. The Contractor shall
�+ be responsible for all damages occurring due to neglect or failure to meet these
requirements. When dictated by conditions that might endanger the public, a watchman
shall be provided to fulfill the requirements stated herein.
C. Traffic Flow and Continuance of Services: The work shall be arranged in a
manner that will cause a minimum of disturbance to vehicular and pedestrian traffic.
Adequate ingress and egress to both private and public property shall be provided by the
Contractor during all stages of construction. Without written approval from the city or
utility company, existing services shall not be interrupted by the construction work.
03. PRELIMINARY WORK:
A. Valuable Trees and Shrubs: When the construction work involves the
removal of valuable trees and shrubs on existing public rights of way, the work shall be
done in cooperation with the city, county, or state.
B. Protection of Private Property: The Contractor shall provide protection for
privately owned trees and shrubs bordering the right of way and shall take full responsibility
for any damage that does occur.
MR
0"

C. Existing roads, subject to interference by the Contractor's work, shall be kept
open in all cases. The Contractor shall provide, erect and maintain, at his own expense,
�. effective barricades on which shall be placed acceptable warning and/or detour signs at each
side of any road obstruction caused by the operations of the Contractor. All barricades shall
comply with OSHA requirements and State or local laws, whichever is most strenuous.
FW
D. The Contractor shall protect all public roads which may be damaged by,
interfered with, or given undue wear by reason of the work, and shall repair or replace them
,M if damaged, at his own expense, to the satisfaction of governmental authorities and the
Owner.
�., E. When questions arise as to safe methods or suitable protection, the
Contractor shall confer with the Owner but full responsibility for results shall rest with the
Contractor.
04. DAMAGES AND COMPLAINTS
�+ A. The Contractor shall provide protection which, in the opinion of the Owner,
will prevent damage to the property, such as lawns, roads, fences, buildings, drains, and
pipelines by passage of his equipment, and shall assume sole responsibility for damages
thereby incurred and shall notify the Owner immediately if and when damage occurs. The
Owner shall be promptly notified of all pipelines that are broken by the Contractor's
operations and immediate arrangements made for repairs. Damage to property shall be
�+ repaired to a condition that is as good or better than original.
B. The Contractor shall promptly comply with all reasonable requests of the
FMM landowners and tenants relative to access to right of way and to general conduct of his work;
however, he shall not enter into any agreements with property owners or tenants on other
matters such as the saving of logs or firewood or the disposal of brush without prior
"q approval of the Owner and Engineer. In cases of disagreement between any landowner or
tenant and the Contractor, the Contractor shall notify the Owner and Engineer immediately
and shall not perform any further operations against the objections of the property owner or
tenant without prior approval of the Owner and Engineer.
05. CLEARING AND GRUBBING: Clearing and grubbing shall be performed in areas
indicated and where required for construction. It shall include the complete removal and
disposal of all brush, weeds, timber, stumps, rubbish, and all other obstructions. All such
material shall be removed to a depth of at least P below finished grade. In clearing and
grubbing areas where excavation is done, all timber, roots, or stumps removed that are
exposed by said excavation shall be removed to a depth of one foot below the excavated
surface.
06. DISPOSAL OF CLEARED AND GRUBBED MATERIAL: All refuse from the
clearing and grubbing operation shall be disposed of either by burning or removal to a dump
oil" area that is approved by the Owner. The Contractor shall obtain a burning permit from the
city fire chief before any burning is started. Burning, if approved, shall be done in such a
2

' manner that does not create hazards such as damage to existing structures, trees and
vegetation, interference with traffic and construction in progress. When the construction site
is outside the city limits and burning is required, proper permits shall be obtained from the
city, county, or state officials. All disposal by burning shall be kept under constant
supervision until all fires have been extinguished. All burning shall comply with all state
and local laws relative to the building of fires.
07. ARCHAEOLOGICAL: If the Contractor, during the prosecution of work,
encounters an unidentified archaeological or other cultural resource within the work area,
the Contractor shall immediately stop work and notify the Engineer.
08. PAYMENT: Work under this section is incidental to the work in this Contract.
A. Vegetation and Ornamental Items: The Contractor shall be fully responsible
for protection of or removal and replacement of ornamental trees, shrubs and grasses,
decorative items such as retaining walls and all other items with no additional payment or
compensation. Seeding and sodding shall be handled as outlined in Section 8.
M
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DIRECTIONAL BORE AND DISCHARGE HEADER FOR THE
REVERSE OSMOSIS WATER TREATMENT FACILITY
TYRRELL COUNTY
ow SECTION 2
PIPE FOR DISCHARGE
01. SCOPE: This specification covers high density polyethylene (PE 3408) pressure
pipe intended for the transportation of reverse osmosis treatment plant concentrate
discharge.
Unless otherwise noted, the materials listed below are acceptable to the Owner for use.
'M Should the Contractor desire to use other materials not listed in these specifications, written
permission must be obtained from the Owner's Engineer.
FM All material shall be free from defects impairing strength and durability and be of the best
commercial quality for the purposes specified. It shall have structural properties sufficient
to safely sustain or withstand strains and stresses to which it is normally subjected and be
true to detail.
02. SUBMITTALS: The Contractor shall submit to the Engineer six (6) copies of all
submittal data for review and/or approval. Submittals shall include at a minimum: (1) the
manufacturer's name, (2) type of material, (3) ASTM, ANSI, AWWA or other quality
standard and (4) pressure class. If the materials do not meet the quality standards specified,
the submittals will be rejected and other materials submitted as specified. The Contractor
must obtain approval of all pipe materials prior to commencing construction.
rim The Contractors shall submit to the Engineer two (2) copies of a certificate of inspection
from the pipe manufacturer that the pipe supplied has been inspected at the plant and meets
the requirements of these specifications.
03. PIPE DELIVERY, STORAGE AND HANDLING: Units shall be delivered,
handled, and maintained in a manner to avoid damage to the pipe. The pipe shall be stored
in an open area on high, well -drained land not subject to flooding, mud, or other means of
contamination.
M"
FM
4

FM
fm
04. HIGH DENSITY POLYETHYLENE PIPE:
OW A. General: Materials used for the manufacturing of polyethylene pipe and
fittings shall be PE 3408 High Density Polyethylene (HDPE) meeting the ASTM D3350
cell classification of 345434C.
OR
The material used in the production of potable water pipe shall be approved by the National
Sanitation Foundation (NSF).
B. Pipe Thickness: The material shall have a minimum Hydrostatic Design
Basis (HDB) of 1600 psi at 73°F when tested in accordance with PPI TR-3 and shall be
listed in the name of the pipe and fitting manufacturer in PPI TR-4.
Polyethylene pipe shall be manufactured in accordance with AWWA C906 for sizes 4"
'am through 54".
Permanent identification of piping service shall be provided by co -extruding longitudinal
blue stripes into the pipe's outside surface. The striping material shall be the same material
as the pipe material except for color.
fan C. Joints: Butt fusion or Electrofusion welded in accordance with ASTM
D3261.
D. Marking: The net weight, pressure class or nominal thickness, sampling
period and manufacturer shall be marked on each pipe.
fm 05. METHOD OF MEASUREMENT: Pipe shall be measured per linear foot, complete
in place and accepted, including the furnishing of all labor, tools, materials, and equipment
necessary for trenching, laying, jointing, testing, backfilling, connections to existing mains,
FOR and all other necessary incidentals.
06. PAYMENT: Payment shall be made at the contract unit price on items measured as
described above.
W
MR
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FUR
DIRECTIONAL BORE AND DISCHARGE HEADER FOR THE
REVERSE OSMOSIS WATER TREATMENT FACILITY
TYRRELL COUNTY
MR SECTION 3
GUIDED BORING INSTALLATION
01. GENERAL:
A. Scope: This section includes the installation of the discharge main by guided
boring, including connecting to the existing discharge main. The Contractor will furnish all
labor, components, materials, tools, and appurtenances necessary or proper for the
performance and completion of the contract.
B. General Description of Method: Guided boring is a method of trenchless
construction using a surface launched steerable drilling tool controlled from a mobile
drilling frame, and includes a field power unit, mud mixing system and mobile spoils
extraction system. The drilling frame is sited and aligned to bore a pilot borehole that
conforms to the planned installation of the main. The drilling frame is set back from an
rM access pit that has been dug (typically at the location of a proposed manhole or other
appurtenance) and a high-pressure fluidjet toolhead that uses a mixture of bentonite clay and
water is launched. Pits are normally dug at the start point and endpoint of the proposed pipe
installation and are used to align the toolhead, attach other equipment, and to collect and
Mal remove excess spoils. Using an electronic guidance system, the toolhead is guided through
the soil to create a pilot borehole. Upon reaching the endpoint joint, the toolhead is removed
and a reamer with the product pipe attached is joined to the drill string and pulled back
through the borehole. In large diameter installations, pre -reaming of the borehole will
usually be done prior to attaching the product pipe for the final pullback. A vacuum spoils
extraction system removes any excess spoils generated during the installation. The
connections, manholes, or other appurtenances are then completed at both the start point and
endpoint locations and the surface restored to its original condition.
rM
C. Qualifications:
,m, 1. Guided boring Contractors will have actively engaged in the
installation of pipe using guided boring for a minimum of three years.
,., 2. Field supervisory personnel employed by the Guided Boring
Contractor will have at least three years experience in the performance of the work and tasks
as stated in the contract document.
Psi
MR 6

MR
MR
D. Submittals:
IM 1. Submit documentation showing three years of guided boring
experience. Information must include, but not be limited to, date and duration of work,
location, pipe information (i.e., length, diameter, depth of installation, pipe material, etc.),
MR project owner information, (i.e., name, address, telephone number, contact person), and
the contents handled by the pipeline (water, wastewater, etc.).
2. Submit a list of field supervisory personnel and their experience
with guided boring operations. At least one of the field supervisors listed must be at the
site and be responsible for all work at all times when guided boring operations are in
progress. Guided boring operations will not proceed until the resume(s) of the
Contractor's field supervisory personnel have been received and reviewed by the Project
Engineer.
3. Submit the following drawings and documents:
a. Working drawings and written procedure describing in
detail the proposed method of installation. This will include, but not be limited to, size,
capacity and setup requirements of equipment; location and siting of drilling and
receiving pits; dewatering if applicable; method of fusion and type of equipment for
joining pipe; type of cutting tool head; and method of monitoring and controlling line and
depth. If the Contractor determines that modifications to the method and equipment as
stated in the submittal is necessary during construction, the contractor will submit a plan
describing such modifications, including the reasons for the modification.
b. Bentonite drilling mud products information (MSDS);
special precautions necessary; method of mixing and application; and method of
removing spoils.
E. Site Conditions:
1. Drilling operations must not interfere with, interrupt, or endanger
surface and activity upon the surface.
2. Contractor must comply with all applicable jurisdictional codes
and OSHA requirements.
3. When rock stratum, boulders, underground obstructions, or other
soil conditions that impede the progress of drilling operations are encountered, the
Contractor and Engineer shall review the situation and jointly determine the feasibility of
continuing drilling operations, making adjustments or switching to an alternative
construction method.
PM
MM

MR
MR
02. MATERIALS -
No A. Material requirements:
1. Pipe and fittings.
a. High Density Polyethylene Pipe (HDPE) and fittings will
be used in accordance with the materials specifications. All additional appurtenances
such as tees, gaskets, flange adaptors, etc. will meet the material specifications. The
Contractor will supply the pipe and fittings and will include its price in the bid. All pipe
installed by guided boring will be joined by an approved butt fusion or electrofusion
technique according to the manufacturers specifications.
b. HDPE pipe shall be produced from resins with a material
designation PE3408, and a cell classification PE334434 as specified within ASTM
D3350, and dimensions and workmanship as specified by ASTM F714. It will also meet
the requirements of AWWA ASTM D3350. Pipe will be legibly marked at intervals of
no more than five feet with the manufacturer's name, trademark, pipe size, HDPE cell
classification, appropriate legend such as SDR 11, ASTM D3035, AWWA C901 or
C906, date of manufacture and point of origin. Pipe not marked as indicated above will
be rejected.
2. Drilling fluid.
a. Drilling fluid will be a mixture of water and bentonite clay.
The fluid will be inert. The fluid should remain in the tunnel to ensure the stability of the
tunnel, reduce drag on the pulled pipe, and provide backfill with the annulus of the pipe
and tunnel.
b. Disposal of excess drilling fluid and spoils will be the
responsibility of the Contractor who must comply with all relevant regulations, right-of-
way, work space and permit agreements. Excess drilling fluid and spoils will be disposed
at an approved location. The Contractor is responsible for transporting all excess drilling
fluid and spoils to the disposal site and paying any disposal costs. Excess drilling fluid
and spoils will be transported in a manner that prevents accidental spillage onto
roadways. Excess drilling fluid and spoils will not be discharged into sanitary or storm
drain systems, ditches or waterways.
C. Drilling fluid returns (caused by fracturing of formations)
at locations other than the entry and exit points will be minimized. The Contractor will
immediately clean up any drilling fluid that surfaces through fracturing.
d. Mobile spoils removal equipment capable of quickly
Im removing spoils from entry or exit pits and areas with returns caused by fracturing will be
present during drilling operations to fulfill the requirements of paragraphs b and c above.
fm
MR

MM
FM
am
e. The Contractor will be responsible for making provisions
for a clean water supply for the mixing of drilling fluid.
03. EXECUTION:
MR A. General:
1. The Engineer shall be notified immediately if any obstruction is
IM encountered that stops the forward progress of drilling operations.
2. Dewatering of pits and excavations must meet the general
MR provisions and specifications for new water main construction in effect at Dare County.
The type of dewatering method will be at the option of the Contractor. When water is
encountered, the Contractor must provide a dewatering system of sufficient capacity to
M+ remove water, keeping any excavations free of water until the backfill operation is in
progress. Dewatering shall be performed in a manner that removal of soil particles is
held to a minimum.
MR
B. Preparation:
1. Excavate required pits in accordance with the working drawings.
2. The drilling procedures and equipment shall provide protection of
workers, particularly against electrical shock. As a minimum, grounding mats, grounded
equipment, hot boots, hot gloves, safety glasses, and hard hats shall be used by crew
members. The drilling equipment shall have an audible alarm system capable of
detecting electrical current.
3. Removal of trees, landscaping, pavement, or concrete shall be
''' performed as specified.
F"
C. Guided Boring Operations:
1. Equipment.
am a. The drilling equipment must be capable of placing the pipe
within the limits indicated on the contract plans.
F' b. Guided boring equipment shall consist of a surface
launched steerable drilling tool controlled from a mobile drilling frame, and include a
MR field power unit, mud mixing system and mobile spoils extraction system.
C. The number of access pits shall be kept to a minimum and
FM the equipment must be capable of boring the following lengths in a single bore. The
guided boring system will have the capability of boring and installing a continuous run
without intermediate pits of a minimum distance for the following pipe diameters:
F"
9
MR

MR
FM
Product Pipe Size Minimum Boring Distance
1-1 %z inches 500 feet
2 — 4 inches 450 feet
6 inches 400 feet
8 inches 350 feet
10 —16 inches 300 feet
d. The guidance system shall have the capability of measuring
vertical (depth) position, horizontal position and roll. The guidance system must meet
the following specifications in soft homogenous soils:
Accuracy
Vertical position: ± 1 inch at 18-96 inches of depth
± 2 inches at 97-144 inches of depth
± 4 inches at 145-180 inches of depth
± 6 inches at 181-300 inches of depth
± 10 inches at 301-480 inches of depth
Horizontal position: ± 2 inches at 18-96 inches of depth
± 4 inches at 97-144 inches of depth
± 6 inches at 145-180 inches of depth
± 12 inches at 181-300 inches of depth
± 24 inches at 301-480 inches of depth
e. Equipment set-up requirements shall be prepared by the
Contractor and submitted to the Engineer per the requirements as stated under
"Submittals."
F,
f. Required Safety Equipment: During drilling operations, all
equipment shall be effectively grounded and incorporate a system that protects operating
personnel from electrical hazards. The system shall be equipped with an audible alarm
that can sense if contact is made with an energized electric cable. Proper operation of the
alarm system will be confirmed prior to the drilling of each tunnel. All equipment will be
connected to ground with a copper conductor capable of handling the maximum
anticipated fault current. Crew members operating drilling equipment and handling rods
will do so while standing on grounded wire mesh mats, ensuring that all equipment is
grounded, and wearing hot boots, hot gloves, safety glasses and hard hats. Crew
members operating handheld locating equipment will wear hot boots.
g. Equipment set-up requirements and locations shall be
determined by the Contractor and submitted to the Engineer per the requirements as
stated under "Submittals."
10

on
FM
2. Pilot Hole Boring.
a. The entry angle of the pilot hole and the boring process will
maintain a curvature that does not exceed the allowable bending radii of the product pipe.
b. Alignment Adjustments and Restarts.
(1) The Contractor shall follow the pipeline alignment
M* as shown on the Drawings, within the specifications stated. If adjustments are required,
the Contractor shall notify the Engineer for approval prior to making the adjustments.
MR
3. Installing Product Pipe
a. After the pilot hole is completed, the Contractor shall
install a swivel to the reamer and commence pullback operations. Pre -reaming of the
tunnel may be necessary and is at the option of the Contractor.
OW b. Reaming diameter will not exceed 1.5 times the diameter of
the product pipe being installed.
C. The product pipe being pulled into the tunnel will be
protected and supported so that it moves freely and is not damaged by stones and debris
on the ground during installation.
d. Pullback forces will not exceed the allowable pulling forces
for the product pipe.
e. The Contractor shall allow sufficient lengths of product
pipe to extend past the termination point to allow connections to the diffuser assembly.
Pulled pipe will be allowed 24 hours of stabilization prior to making tie-ins. The length
of extra product pipe will be at the Contractor's discretion.
D. Clean-up: The Contractor shall maintain the work site in a neat and
orderly condition throughout the period of work and after completing the work at each
site, remove debris, surplus material and temporary structures erected by the Contractor.
The site shall be restored to a condition equal to the existing condition prior to being
disturbed.
f"
MR
MM
I"

No
�. DIRECTIONAL BORE AND DISCHARGE HEADER FOR THE
REVERSE OSMOSIS WATER TREATMENT FACILITY
fop
TYRRELL COUNTY
SECTION 4
MR
SLIP-ON DIFFUSER CHECK VALVES
01. SCOPE: This section shall include the furnishing of four (4) Diffuser Check Valves
as shown on the drawings and specified herein.
02. SUBMITTALS:
mint A. Submit six (6) copies of product literature that includes information on the
performance and operation of the valve, materials of construction, dimensions and weights,
FW elastomer characteristics, flow data, headloss data, jet velocity data, and pressure ratings.
B. Provide shop drawings that clearly identify the valve dimensions.
`_' 03. QUALITY ASSURANCE:
A. Supplier shall have at least ten (10) years experience in the manufacture of
"duckbill" style elastomeric valves, and at least five (5) years experience with diffuser
applications, and shall provide references and a list of installations upon request.
04. "DUCKBILL" ELASTOMERIC DIFFUSER VALVES:
a•,
A. Diffuser Check Valves are to be all rubber of the flow operated check type
with a slip-on connection. The Check Valve is designed to slip over the specified pipe
outside diameter and attached by means of vendor furnished stainless steel clamps. The port
area shall contour down to a duckbill which shall allow passage of flow in one direction
while preventing reverse flow. The flange and flexible duckbill sleeve shall be one-piece
rubber construction with nylon reinforcement.
B. The Diffuser Check Valves shall provide a variable orifice nozzle to
minimize variation in jet velocity with flow. The jet velocity vs. flow characteristics shall
follow a non -linear curve which maximizes jet velocity at low flow rates compared to fixed
orifice nozzles. Manufacturer shall have flow test data on diffuser check valves obtained by
an independent test facility verifying pressure drop and jet velocity vs. flow.
C. Company name, plant location, valve size, and serial number shall be bonded
to outside of the check valve. Valves shall be manufactured in the USA.
rw 12

FOR
05. FUNCTION:
m.
A. When line pressure inside the valve exceeds the backpressure outside the
valve by a certain amount, the line pressure forces the bills of the valve open, allowing flow
to pass. This restriction causes an increase in the jet velocity of the discharge, while the
MR
shape of the opening creates a flattened plume -shaped discharge pattern to increase
dispersion. When backpressure exceeds the line pressure by at the same amount, the bills of
the valve are forced closed.
06. MANUFACTURER:
A. All valves shall be of the Series TF-D as manufactured by the Red Valve
Co., Inc. of Carnegie, PA 15106 or approved equal.
07. INSTALLATION:
A. Valve shall be installed in accordance with manufacturer's written
installation and Operation Manual and approved submittals.
08. MANUFACTURER'S CUSTOMER SERVICE:
A. Manufacturer's authorized representative shall be available for customer
service during installation and start-up, and to train personnel in the operation, maintenance
and troubleshooting of the valve.
B. Manufacturer shall also make customer service available directly from the
factory in addition to authorized representatives for assistance during installation and start-
up, and to train personnel in the operation, maintenance and troubleshooting of the valve.
13

REVERSE OSMOSIS PLANT
BULL BAY CONCENTRATE DISCHARGE
4" PVC DISCHARGE MAIN
TYRRELL COUNTY WTF
�20
iy�,i T WEP
VICINITY AND LOCATION MAP
TYRRELL CO. WATER SYSTEM IMPROVEMENTS FIGURE 1
R.O. PLANT CONCENTRATE DISCHARGE
HOBBS, UPCHURCH&ASSOCIATES, P.A. SCALE: DESIGNED: ETNONE
W
CONSULT EAGI11MS 1 = 600 DRAWN: DCJ
NA hE4Q, NORTHCAR00V 279M DATE: FJ4CHECKED: ETW
25228 CXOATANHWY, SUlIEV MAY 2000
252-441-30 FAX 252 44t-2M SHEET: 1 0 F 4

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4" PVC DISCHARGE MAIN
(CONTRACT III BY OTHERS)
EXISTING RIPRAP
BULKHEAD
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EDGE OF WATER
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BULL BAY
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20' UTILITY
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WATER MAIN
BEGIN 125' 4" HDPE
DIRECTIONAL BORE
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PROFILE
TYRRELL CO. WATER SYSTEM IMPROVEMENTS
FIGURE 2
R.O. PLANT CONCENTRATE DISCHARGE
URCH A6M 7ES P.A.
��� UPCH � �
SCALE: 1 'p=50, H
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DESIGNED: ETW
COAR L7A G B�
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1 = 5 V
DRAWN: DCJ
DATE:
CHECKED: ETW
NAGS hEAQ, ACM CA�ALM 2M%
2W S CROATAN hIW , ME2A
252-44F3? FAX 252-4*2M
MAY 2000
SHEET: 2 OF 4

1 0'
CONCRETE 18"
3' ANCHOR
v■v I 6"
I�.
18
- - _ 3
1
4" HDPE DIRECTIONAL 6..
�+ BORE PIPE
3" DIFFUSER CHECK VALVES ��
(4 TOTAL) 3'
2"X 1 /4' S.S. STRAP W/
6"X3/4" S.S. ANCHOR BOLTS,
WASHERS & NUTS
12" HDPE DIFFUSER
�1 J MANIFOLD
PROVIDE NEOPRENE um
PADS BETWEEN S.S. STRAPS AND HDPE PIPE
AND BETWEEN CONCRETE ANCHOR AND HDPE PIPE. 15' TYP -
EXISTING GRADE
4" HDPE DIRECTIONAL
BORE PIPE
SECTION A -A
4" 30' HDPE A
MITTERED ELL
1 HDPE END CAP
30' - - -
4" HDPE DIRECTIONAL ^ t 8" 5 < r 4 �, '
LL
BORE PIPE
3 r�l
EXISTING GRADE
14996
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SlW 4" DISCHARGE HEADER DETAIL
P"
TYRRELL CO. WATER SYSTEM IMPROVEMENTS
R.O. PLANT CONCENTRATE DISCHARGE FIGURE 3
UPCHW CH& ASSXC/A TES, P.A. SCALE: DESIGNED: ETW
DRAWN: DCJ
NAGS hEAD, ACM CAFaN 27969
,5228 �ATANHW RM24 DATE: CHECKED: ET�1I/
252-441-MO FAX[phone] MAY 2000
SHEET: 3 OF 4

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CONSTRUCTION NOTES
AND SPECIFICATIONS
1. LOCATION OF DIRECTIONAL BOREHOLE SHALL BE COORDINATED WITH
AND APPROVED BY THE ENGINER PRIOR TO COMMENCING BORING
OPERATIONS.
2. NO VEHICULAR TRAFFIC OR CONSTRUCTION ACTIVITIES ARE ALLOWED
IN THE WELANDS BETWEEN RIPRAP AND THE EDGE OF WATER.
3. THE CONTRACTOR SHALL RESTORE ALL AREAS DESTURBED BY
CONSTRUCTION ACTIVITIES TO THEIR ORIGINAL CONDITIONS.
4. THE CONTRACTOR SHALL INSTALL A 10' X 10' CONTAINMENT FENCE
AROUND THE BOREHOLE TO HOLD EXCESS DRILLING FLUID AND
SPOILS. THE DRILLING FLUIDS AND SPOIL SHALL BE PUMPED FROM
THE CONTAINMENT STRUCTURE TO THE SHORE, WHERE THE MATERIAL
WILL BE REMOVED AND DISPOSED OF. NO DRILLING FLUIDS OR SPOILS
SHALL BE STORED ON SITE. EXCESS DRILLING FLUID AND SPOILS
SHALL NOT BE DISCHARGED INTO SANITARY OR STORM DRAIN
SYSTEMS, DITCHES OR WATERWAYS.
5. THE PIPE FOR THE DIRECTIONAL BORE SHALL BE HIGH DENSITY
POLYETHYLENE (PE 3408) DR11 IN ACCORDANCE WITH AWWA C906.
FITTINGS SHALL BE BUTT TYPE FITTINGS AND SHALL CONFORM TO
AWWA 906 AND SHALL BE BUTT FUSION WELDED TO THE PIPE IN
ACCORDANCE WITH ASTM D3261.
6. DIFFUSER CHECK VALVES SHALL BE FLOW OPERATED ALLOWING FLOW
IN ONE DIRECTION. THE VALVE SHALL BE OF ALL ONE—PIECE RUBBER
CONSTRUCTION WITH NYLON REINFORCEMENT. THE DIFFUSER CHECK
VALVE SHALL CONNECT TO THE DISCHARGE HEADER BY SLIPING OVER
THE DIFFUSER PORT ATTACHED WITH STAINLESS STEEL CLAMPS. THE
DIFFUSER CHECK VALVES SHALL BE AS MANUFACTURED BY THE RED
VALVE CO. OR APPROVED EQUAL.
7. CONCRETE ANCHORS SHALL BE CAST OFF —SITE AND SHALL HAVE A
MINIMUM COMPRESSIVE STRENGTH OF 3,000 PSI. THE ANCHORS
SHALL BE SHIPPED TO THE FINAL LOCATION AND PLACED IN HAND
EXCAVATED TRENCHES. NO MECHANICAL EXCAVATING EQUIPMENT
SHALL BE USED. ,�#0`.��
o
TYRRELL CO. WATER SYSTEM IMPROVEMENTS
R.O. PLANT CONCENTRATE DISCHARGE
HOBBS, UPCHURCH& ASSOCIATES, P.A.
COMULTIJIdG FJUGtEEAS
lqj NAGS hW, XfflH CAXW 2/W
2522 S CROATMW,, S11TE 2A
252-44-M FAX 252 40-2M
SCALE:
NONE
DATE:
MAY 2000
SEAL
14996
Ao ._•-•�• �,�•`�`
T WEN
yn�erntgstt��` � 122.E
FIGURE 4
DESIGNED: ETW
DRAWN: DCJ
CHECKED: ETW
SHEET: 4 OF 4