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PAGGI. MARTIN & DEL BENE LLP
Consulting Engineers & Land Surveyors
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54-56 Main Street
Poughkeepsie, New York 12601
914-471-7898
914-471-0905 (FAX)
VIA FAX & MAIL:
**** MEMORANDUM ***
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TO: Stuart Messinger, Chazen Environmental Services
Julie Hartman, Chazen Environmental Services
FROM: Joseph E. Paggi, Jr., P.E.
DATE: February 3, 1999
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RE: Pizzagalli Building 922
As per your request to Constance Smith, Supervisor, Town of Wappinger, dated January
22, 1999, you had asked for specific information regarding the Pizzagalli Building 922 and
it's water supply. In a follow-up conversation with our office, you had requested that we
limit our scope of research to Question No.9, which asks, "Is there a large enough water
supply to meet an average daily demand of approximately 30,000 GPD?"
In our initial analysis of this request, we find that we need to know certain information.
This information is as follows:
1. What is the daily flow period for the 30,000 GPD? We have heard conflicting
reports ranging from a low of 7 hours to a high of 10 hours. Could you kindly
confirm this.
2. What are the numbers of days in the week that this school will be in operation?
3. What is the peak hourly flow rate required by the school?
4. Will it be a necessity to utilize the existing domestic jockey pump system that
previously served the 922 building, and if so, what are the capacity of the
pump(s) and how are they controlled?
Could you kindly fax this information back to our office at (914) 471-0905 in order that
we may complete the study as efficiently as possible.
JEP:law
cc: Hon. Constance Q. Smith, Supervisor
Hon. Vincent Bettina, Councilman
Hon. Joseph Paoloni, Councilman
Hon. Joseph Ruggiero, Councilman
Hon. Robert Valdati, Councilman
Hon. Elaine Snowden
Michael Tremper via fax
Albert P. Roberts, ESQ.
Joseph E. PaggI. Jr., P.E.
Ernst Martin. Jr.. P.E., L.S.
Charles R. DelBene. Jr.. P.E.
,
POLLUTION CONTROL, INC.
Operation of Water and Wastewater Treatment Systems
191() ROUTE 376
WAPPINGERS FALLS, NY 12590
(914) 463.7310
Fax 1914} 462--7305
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M-E-M-O.R-A-N-D-U-M
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RE:
Constance O. Smith, Town of wappinger Supervisor
Vincent Bettina, Town of Wappinger Councilman
Joseph paoloni, Town of Wappinger Councilman
Joseph Ruggiero, Town of Wappinger Councilman
Robert L. Valdati, Town of Wappinger Councilman
Michael P. Tremper, CAMO Pollution Control, Inc. ~i/~
February 3, 1999
Pizzagalli Building #922 - Wappingers Central School District
TO:
FROM:
DATE:
The Town Engineer'S office has requested that CAMO Pollution
Control, Inc. respond to the operational concerns of the
Wappingers Central school District's proposed occupancy of the
Pizzagalli #922 building, which is part of the North Wappingers
Park Water District.
As you are aware, the North Wappingers Park Water District
has been plagued over the years with complaints of discolored
water. The causes are as follows:
1. The wells located at the North Wappingers Park Water
System have low levels of iron and manganese. The iron
and manganese are oxidized by the chlorination process
and it becomes a ~recipitant that settles in the water
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mains. when the velocity of the wCo.,-~er in the mains
changes, the water becomes stirred up and, as a result,
we have dirty water complaints. CAMO Pollution
Control, Inc. has been able to drastically redu~e these
complaints by installing ten fire hydrants and flushing
the mains twice per year.
The system pressure is achieved by using a Hydra-
numatic tank. As we have discussed previously, this
tank is significantly undersized. As a result, the
slightest changes in demand on the system causes
cycling of the pumps, resulting in significant velocity
changes in the water main and dirty water complaints.
CAMO pollution Controlr Inc. has sized one of the well
pumps so that it operates on a continuous basis without
turning en and off. However r during peak demand ~
periods or the summer months, demand exceeds the output
of this pump, the backup pump comes on, and dirty water
complaints follow.
Pizzagalli Building #922 is loc~t~~ at the far end of the
distribution syst.em of the Norti, Wappi -HS ,~"l.rk Water System.
Due to the elevation of the building, i~ has between 35 and 40
lbs. of pressure in the water main at that point. When IBM used
the building, they needed a higher pressure and installed and
operated a booster station at the water main. This booster
station cycled pumps on and off during different periods of the
day to ensure that there was adequate pressure within the
building, It was my understanding that their water usage, while
it was comparable to if not more than what the school district
would need, was spread over a 24 hour period. However, during
their peak periods when more than one of their booster pumps came
on, it would put a heavy demand on our system and increase the
number of dirty wat.er complaints and, at times, low p:r"essure
complaints. Since the building has been unoccupied and the
booster station secured and shut down by Pizzagalli, the number
of dirty water complaints received by CAMO Pollution Control,
Inc. has been drastically reduced in 1998 to three.
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According to ~hazen Companies, the schou~ district has
requested 30,000 gallons per day. I have had a discussion with
Julie Hartman of Chazen Companies who informed me that 30,000
gallons will be used over a seven hour period. If it was spread
out evenly over this seven hour period, it would be in excess of
70 gallons per minute. I have requested Ms. Hartman to research
the peak hourly rate of the building, the number of days per week
and, if the building is going to use the pressure booster
station, a description of the operation of the booster station,
including the control system and pump curves. This is important
information. Heavy draws on the end of the Atlas Water System
result in the cycling of the pumps at the well field, stirs up
the water mains, and results in dirty water and, possibly, low
pressure complaints.
With this building empty, water quality can be adequately
controlled by flushing hydrants and good operation. Occupancy of
the building magnifies t.he deficiencies of the system.
If you have questions or would like to discuss this matter
further, please contact me at (914) 463-7310.
cc: Joseph E. paggi, Town of Wappinger Engineer
Albert Roberts, Esq., Town of wappinger Attorney
MPT,d,t0454
North Wappingers park (Atlas)
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3ent By: THE CHAZEN COMPANIES;
5183710623;
Feb-10-99 1 :41PM;
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The Chazen Companies
MEMORANDUM -
To:
Jay Paggi
From:
Stuart Mesinger
Date:
February lOt 1999
Re:
Response to February 3t 1999 Memo
Job#:
19901.00
In response to your memo of February 3, 1999 memot we offer the following.
1. The school day extends from about 8:00 a.m. to about 3:00 p.m. However, staff
begin arriving around 7:00 a.m., and there are extracurricular activities with
0'/ buses lea~g at 4:30 p.m. Thust ~e bulk of water use will occur d~g the ten-
\(t::f hour penod from 7:00 a.m. till 5:00 p.m. There are athletic and other
extracurricular activities at night andt occasionally, on the weekend, but for
modeling purposes the above estimate appears to be most accurate.
/~ The school is in operation Monday through Friday. There are occasional
~ extracurricular activities on the weekend., but these are limited in time and
duration.
~~. We estimate daily sanitary useage at(30tOOO gallons) (1300 students + 160
faculty/staff @ 20 gallonslperson = 29t200 gallons; say 30,000 gallons). We
estimate the peak hourly flow from sanitary useage at(12.000 gallons)jWe
understand from our review of previous engineering estimates that the make-up
@,waterrequirementfOrtheCOOlingsystematPeakUSeage.is57gpm.Thepeak
~ hourly requirement from the cooling system would therefore be 3,420 gallons
and the combined hourly peak would be 15.420 gallons. Note that the average ~S7 ~ p'" 4
~ use from the cooling system would be considerably less. Winter useage (Oct. 15
to April 15) is estimated at 25% of peakt while useage during intermediate times
is estimated at 63% of peak. Note also that the cooling demand for all time
periods is likely to be less than was the case for the IBM useage because of the
nature of the uses and the configuration of the space.
3ent By: THE CHAZEN COMPANIES;
5183710623;
Feb-1 0- gP- 1 :41 PM;
Page 2/3
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(Jour understanding from building personnel and the water system operators is
that the jockey pump system was used to provide water when the cooling system
was in operation. The jockey pump has a capacity of 60 gpm. The pump is
configured to draw water when the cooling system is in operation. There are
additionally three pumps on the property. each with a capacity of 180 gpm. \
Please do not hesitate to contact me with any questions.
The Chazen Companies
Cc: Joe Corrigan
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FEB I 8 :999
POLLUTION CONTROL, INC.
Operation of Water and Wastewater Treatment Systems
1910 ROUTE 376
WAPPINGERS FALLS, NY 12590
(914) 463-7310
Fax (914) 463-7305
II
M_E_M-O-R-A-N-D-U-M
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TO:
Joseph E. paggi, Town of Wappinger Engineer
Michael P. Tremper, CAMO Pollution Control, Inc. ~
February 16, 1999
FROM:
DATE:
RE:
Wappingers Central School District Use of
Pizzagalli Building #922
I have reviewed a letter from Stuart Mesinger of Chazen
Companies indicating that the peak hourly demand for pizzagalli
Building #922 will be 257 gallons per minute.
As you are aware, there are a number of things that CAMO
Pollution Control, Inc. has done to help improve the water
quality for the residents of the North Wappingers Water District.
To help eliminate excessive pump cycling due to the undersized
Hydra-numatic tank, the following steps have been taken in the
operation of the two wells that are being used at this time:
The lead pump is a 15hp submersible pump capable
of producing an average of approximately 130
gallons per minute. This pump runs almost
continuously, 24 hours per day. During times of
high usage, the pressure drops to a point where
the second pump comes on.
The lag pump is a 50hp turbine pump. In order to
prevent this pump from cycling excessively and
causing dirty water complaints, this pump rate is
throttled to approximately 90 gallons per minute.
''-"
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The sizing of pump #1 to meet normal demand and
the throttling of pump #2 to prevent excessive
cycling is complicated by the fact that there are
no accurate well meters on either of these pumps.
However, the rates that have been selected do keep
the system from excessive cycling, This not only
improves water quality within the water district,
but prevents excessive wear and tear on the pumps.
As you can see from the above mentioned well rates, if Mr.
Mesinger's number of 257 gallons per minute is accurate, the
wells would be unable to maintain these rates. If the school
district was to come on line in Building #922 it would be
necessary to increase the above mentioned well rates, if
possible. Most likely, this would increase the number of dirty
water complaints and low pressure throughout the district.
If you have questions, please contact me at (914) 463-7310.
MPT:dt0461
Atlas
PAGGI, MARTIN & DEL BENE LLP
Consulting Engineers & Land Surveyors
r,
54-56 Main Street
Poughkeepsie, New York 12601
914-471-7898
914-471-0905 (FAX)
* * * MEMORANDUM * * *
TO: Stuart Mesinger, Chazen Companies
FROM: Joseph E. Paggi, Jr., P.E.
DATE: February 17. 1999
RE: Wappinger Central School District/Pizzagalli Building 922
I am in receipt of your February 10th, 1999 memorandum regarding the above
referenced project.
A review of the material sent to our office in your memo indicates that there
would be a peak hourly flow of approximately 257 GPM. This is comprised of
200 GPM domestic flow and 57 GPM cooling water.
Due to the significant increase in domestic usage over previous IBM operation. it
must be determined how many of the booster pumps will be in operation at any
given point in time during this peak hour to meet demand. A worse case
situation, Le. warm weather and peak domestic demand should be considered.
A review of former usage indicates that the average total usage of the building
was in the 30,000 GPD range with only 2,600 GPD being used for domestic
purposes, the remainder being cooling water. This would have been spread out
over the entire day using only the jockey pump to maintain service.
With the peak domestic usage being projected so high, the possibility of the
jockey pump and one or two of the booster pumps being on at the same time is
possible. Please research this and get back to me as soon as possible. Knowing
the peak demand and how it will be met (Le. number of pumps) is crucial for us
to know.
Thank you for your anticipated cooperation.
JEP:law
cc: Michael Tremper
Hon. Constance O. Smith
Albert P. Roberts
Joseph E. Paggi, Jr., P.E.
Ernst Martin, Jr., P.E., L.S.
Charles R. Dcl Bene, Jr., r.E.
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The Chazen Companies
I
MEMORANDUM
To:
Jay Paggi
From:
Stuart Mesinger
Date:
March 1, 1999
Re:
Pizzagalli Building 922 Water Supply
Job#:
19901.00
Attached please find a memorandum from my project engineer with respect to the
pumps at the Pizzagalli building. I trust this answers your questions. Please do not
hesitate to contact me if you require additional information.
Cc: Nick Waer, Joe Corrigan. Dick Powell
DoIlUJDDnt 1
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The Chazen Companies
MEMORANDUM
To: Stuart Mesinger
From: Randy Passmann
Date: March 1, 1999
Re: Pizzagalli Building 922
Job #: 19901.00
As you requested, I visited the Pizzagalli "IBM Building 922" on Meyers Corners
Road. Wappinger, New York on Thursday February 25, 1999. Bill VanTassell,
Building Manager from Pizzagalli Properties accompanied me to review their
available record documents and the Domestic Water Pump Station.
A Federal Pump Corporation made Factory Assembled Pump Station is installed in
the Pump Station Building. The unit has four close-coupled end-suction centrifugal
pumps, one 7.5 Horsepower(HP) and three 15 HP pumps. The adjacent pump
Control Panel is labeled with Federal's Record Number B69057 and Unit # 1 Y2 CK-
7 %-2. The panel cover had four Hand-Off-Automatic (BOA) switches labeled
Jockey, 1, 2 and 3. Pressure controls were mounted on the side of the Control Panel
labeled "Lead, Lagl and Lag2". None of the pumps were in operation at the time of
the site visit. A pressure gauge on the upstream side of the pipes read 52 psi.
Records available at the facility regarding the Pump Station include a Federal
O&M manual labeled with Record Number B69057. This manual provides
information on Type SP-PR duplex (two pump) and triplex (three pump) systems.
No pump curves are included in the manual. The unit installed in the pump station
would be considered as a 4-pumP quadplex pump station, which was custom
assembled. Based on my understanding of the system, it appears that the pump
station operates similarly to the Triplex Type B system in the Manual and
described in the following interpretation:
The jockey pump (lit pump) has a small Gallons Per Minute GPM rating, and
the three main pumps (2nd 3rd and 4th pumps) have an equally larger GPM
rating. The jockey pump operates continuously to satisfy the building water
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demand. A main pump control pressure switch turns on the first main pump
when the jockey pump cannot satisfy the water demand operating alone. A
time delay automatically turns on the second main pump when the :first main
pump has been operating for a pre determined time period.. similarly for the
third main pump. The four pumps will run in parallel for a pre-determined
minimum time or until the demand in the building drops sufficiently to allow
the jockey pump to satisfy it alone, at which time the main pumps will turn
off. The pressure controls mounted on the side of the Control Panel control
when the three main pumps "Lead, Lag1 and Lag2" turn on and off.
I contacted the Federal Pump Corporation to substantiate the pump operation
described above, and obtain pump curves for the four pumps. The pump curves
provided by Federal show the capacity of the Jockey pump to be 60 GPM at 181 feet
of head (78 PSI) and the Three Main pumps are rated at 180 GPM at 181 feet head.
This establishes the capacity of the Pump Station at a maximum of 600 GPM. The
Federal representative stated that the pressure reducing check valves, located on
each on the pump discharges, should be set to 181 feet of head. In this case the,
Jockey Pump and two Main Pumps would be running to meet an anticipated peak
hourly demand of 257 GPM.
As-built construction drawing P-4, dated 8/23/84 shows a 4-inch domestic water
service line labeled as "300 GPM" entering the Central Utility Plant area of the
building. Another drawing shows a .4-inch water supply line running from the pump
station to the building, assumed to be the same line, and an 8-inch main supplying
the Pump Station. Water mains are typically designed on the basis of velocities of 4
to 6 Feet Per Second (FPS) with maximums of 10 to 20 FPS (Salvatol 1992).
Considering a peak flow of 257 GPM, the water velocity in 4-inch and 8-inch Class
52 DIP water lines would be 5.7 FPS and 1.5 FPS respectively. For comparison, a
minimum flow velocity "scouring veloci.ty'~ of 2.0 FPS is commonly used in
wastewater piping system design to keep solids from settling out in the pipes.
As-build construction drawing ST-IGB, dated 9/21/84 shows the plan and profile for
a water main rnnning from Heartstone Drive to the Pizzagalli Property. The main
transitions from 12-inch diameter down to 8-inch at a meter pit approximately 400
feet from Heartstone Drive. I believe that this is the supply line for the Pump
Station. Considering the efl'ects of the Pizzagalli building usage, adding a 257 GPM
demand onto this water main would increase the velocity in the 12-inch line
(assumed CL 52 Ductile Iron) by 0.7 FPS.
During this preparation of this memo, correspondence reviewed included a
reference to "metals" being stirred up in the water. The term "metals" is not
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commonly used in this context and may inadvertently alarm people. This was
perhaps referring to a condition where high velocity water stirs up "sediment" in
water distribution pipelines. This sediment sometimes contains oxidized iron and
manganese, which is can stain laundry red. This condition is often mitigated by
municipalities by instituting a routine hydrant flushing program. Part of the
program, includes alerting residents to the activity to reduce laundry stAining type
problems.
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