WQ0018708_Flow Meter_20101008

FROM
FAX NO. :8435585003
Oct. 08 2010 07:07PM P1
J c$ J WHITE, INC
18124 CHOPP,EE ROAD
HEMINGWAY, SC 29554
1-800-456*6227; FAX [phone]
October 8, 2010
Mr. Bill Stafford, Operator
Bay Tree Lakes WWTP
Harrells, :NC 28444
FIX#910-588-4434
Bill:
This is to verify that the Stevens flow meter at Bay Tree Lakes WWTP was calibrated on April 15,
2010.
The calibration was completed by using the operation manual, staffgauge and ,'the Isco open channel
flow measurement handbook. By using these tools, we discovered that the flow meter was within one
percent (1%) of actual flow.
I appreciate the opportunity to provide you with this service. If I can be of further assistance, please
let me know.
Sincerely,
'X )4'
Joe E. White, Sr.

2 Installation.- & Calibration
2.1 Whenever possible, select a shelter or enclosure
with adequate space to service the equipment,
and suitable ventilation to keep the instrument as
dry as possible. A special weatherproof enclosure
is recommended whenever the instrument will be
directly exposed to the weather. Such an enclosure
is obtainable from the factory. A cartridge type
heater accessory is available for AC models and is
a wise choice for installations subject to high
humidity and dampness.
2.2 Unpack the instrument and inspect for shipping
damage.
2.3 Mount solidly on a level surface, high enough to
prevent counterweight submergence at maximum
head. The float Tine or tape furnished with the
instrument may be shortened to facilitate this.
Allow enough space behind the instrument for
access to the float pulley.
2.4 On Model 61 R, remove all packing material from
around the chart drive assembly.
2.5 Install the float pulley between the friction washer
and pulley flange. See Figure 3. Mount the pulley
with the flat side away from the instrument. Thread
the lock disc to within 1/16 inch of the friction
washer. Leave the two knurled lock screws loose
so that the pulley can be rotated freely on its shaft.
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2.6 Attach the float and counterweight to the float line
or tape. Place the float line or tape over the float
pulley with the float suspended from the left side of
the pulley. (Assuming you are facing the pulley
from behind the instrumnt.) Adjust the length of
the line or tape to permit full travel of the.
counterweightwithout obstruction, or submergence
at maximum head. Check that the holes in the
tape, or beads on the cable, engage the pulley
properly.
2.7. Check that the float is riding correctly on the fluid
surface and is not entangled. For most installations
a stilling well placed off to one side of the flow
channel is used to confine the float and to dampen
out surges and wave actions. This ,stilling well
should be at least 1 inch and preferably 2 inches
larger in diameter than the float. If it is not practical
to use a stilling well, a scow -type float arrangement
can be used so that the float rides directly on the
liquid surface in the flowchannel.
2.8 Refer to Figure 13. Move the cam locking screw 0
to the hole located approximately one inch up and
to the left of its initial position.
2.9 Measure the head in:the weir or flume. To do this
easily and accurately it is strongly recommended
that every installation include aporcelain enameled
iron staff gage mounted on the side of the flume or
weir box. This permits heads to be determined
visually and eliminates !the mess and bother of
placing a ruler in the flow. A variety of sites and
types of staff gages are "available from Leupold 8
Stevens, Inc. After the head or depth has been
determined, find the, corresponding flow from the
rating curve provided.
210 Depending on which model is being calibrated,
use the center of the pen tip 0 or the right ed
of the pointer 21 as the index. Rotate the cam. 10
until the index indicates the flow value determined
in the preceding step. While holding the cam in this
position, clamp the float pulley by tightening the
two knurled lock screws shown in Figure 3. Tighten
them evenly.
2

'" !'ermit Number: WQ0018708 Version: 2.l
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IMENT A - LIMITATIONS AND MONiTO„ NG REQUIREMENTS
a.
9105884434
LASERJET FABAY TREE
• WWTP Effluent (effective until completion and certification of expansion)
EFFLUENT CHARACTERISTICS
bescriptinn - ITS Code
(21iDeg. (') - 0031(1
al Swotted O(1530 __—
lmtnonia total l•.sNI - IMMO
Nitrate Total (as NI - (11)631) .
Fecal MI'. t14;f ( l3rotlt.t�.5�
31fith•'
Kieldaflti. tntallaaNN) 1111625
'I otal Residual - 5(1(IG()
otal Dissolved- 1R11 I)cg.(• _ 7113111
(as CI) - na94(I
conduit or thru treatment plant - 5(10S(1
•_ • n'ed tekfy if the Division ticteriuine5 that the data for this:parameter indicate or suggest wide range
•
torm* freq(ieiii;y-for-this parameter-mad•-be_cha � -- _ _(� �>,_e-- __-- _--
Mons.
•
:ar sampling shall be conducted every March. July. September and November.
;ar sampling shall he conducted every March. July and November.
sllall be no discharge of floating solids or visible foam in other than trace amounts.
EFFLUENT LIMITS ,
Weekly Average
Daily Maximum
MONITORING REQUIREMENTS
Measurement Sample
Frequency - Type
Grab
4 X year
4 X year
4 X p:ar
.1Xyear
- X ear_ — - _ Gratt
4 X Sear (;rah
(irab
_-_--(irab
2 X month Grab
2 X mantis ...._. -(;rah --• •
3 X tear
3 X dear Oral)
...... ---- ._ .. -_ -
( ontinunus Recorder
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