August 21, 2014 - Regular Meeting

WESTERN WESTMORELAND MUNICIPAL AUTHORITY
REGULAR MONTHLY MEETING -AUGUST21, 2014
The Board of Directors of the Western Westmoreland Municipal Authority held a regular monthly meeting on
Thursday, August 21,2014 at 6:00P.M. in the Authority conference room, duly advertised, as required, and with the
following persons in attendance:
I.
Roll Call:
Board Members in Attendance:
Mr. Stan Caroline
Mrs. Barbara Mcintyre
Mr. Mark Wolinsky
Mr. Joseph Knouse
Mr. Tim Watson
Mr. Joseph Lapia
Mr. Robert Wayman
Late Arrival:
Ms. Lisa Balsamico, 6:05 P.M.
Absent:
Mr. Dave Brough
Mr. Charles Konkus
Others in Attendance:
Mr. John M. Campfield, Solicitor
Mr. Brad Boddy, Consulting Engineer
Mr. Kevin Fisher, General Manager
Mrs. Johanna Wtorkowski, Assistant Secretary-Treasurer/Recording Secretary
2.
Mr. Wayman led the Pledge of Allegiance and moment of silence for troops overseas.
3.
Public Comments: None- There were no visitors in attendance.
A.
4.
Communications: None
Secretary's Report- Barbara Mcintyre:
A. Mrs. Mcintyre requested Board approval of the minutes of the July 17,2014 regular meeting. A motion to
approve the minutes, as presented, was made by Mr. Lapia, and seconded by Mr. Knouse. The motion passed
unanimously.
This concluded the Secretary's Report.
5.
Treasurer's Report- Mr. Watson presented the following requisition with the motion to approve as follows:
A. Revenue Fund Requisition No. 214, in the amount of$164,801 .65. A motion to approve was made by Mr.
Wolinsky, and seconded by Mr. Caroline. The motion passed unanimously.
This concluded the Treasurer's report.
It is noted that Ms. Balsamico joined the meeting, at this time. The time was 6:05 P.M.
6.
General Manager's Report- Kevin Fisher: Mr. Fisher reviewed his written report, which was distributed, this
evening.
A. Mr. Fisher has prepared a non-residential capacity tapping fee agreement for Pasquarelli Restaurant.
B. Mr. Fisher is waiting foi approval of the Speedway Planning Module by Penn Township. Brookhaven, Bortz,
and Buena Vista Plans have been approved and forwarded to the respective communities. In some cases,
developer agreements have been prepared, and are out for signatures. Capacity fees have been paid for the
Kenny Ross and Cooper Projects. Mr. Caroline stated that the Speedway Project is on hold, due to the cost to
upgrade State Route 130.
C. There were no sanitary sewer overflows or combined sewer overflows for the month of July.
D. Mr. Fisher is waiting for Schultheis Electric to install the replacement variable frequency drives (VFDs) for
the blowers. Blowers #4 and #6 have been taken out for repairs. The factory representative stated that they
will be unable to repair the blowers, and the blowers will need to be sent back to the factory for repairs.
E. Industrial Appraisal was out, last week, to finalize the appraisal report. The Authority has not yet received
the repmt.
Western Westmoreland Municipal Authority
August 21, 2014
Page I of6
F.
Stan Gorski submitted the response to the lab accreditation inspection. Stan Gorski, Robert Adair, and Kevin
Fisher attended a training class for preparation for the lab supervisor examination. Mr. Gorski and Mr. Adair
are required to take the exam. Mr. Fisher is grandfathered in, and is not required to take the exam, but he
wanted to see what is required of the lab supervisors.
G. The fence has been repaired.
This concluded the Manager's report. The complete report is attached to these minutes.
7.
Consulting Engineer- Brad Boddy, Wade Trim, Inc.:
Mr. Boddy reviewed his written report dated August 21, 2014, which was previously distributed.
A. Solids Processing Project:
I. The electrical contractor is currently addressing punch list items for Contract Two-Electrical.
2. Final payments for Contracts I and 3 have not been remitted to Wayne Crouse, Inc., as the Authority is
waiting for final paperwork from the contractor, for the closeout. Wayne Crouse, Inc. is working on the
paperwork.
3. A payment requisition was not submitted for Contract Two-Electrical.
B. Wet Weather Issues:
I. Upcoming Critical Dates:
a. The 3'.' Quarter 2014 Progress Report is due to the PaDEP on October 30,2014.
b. The Part II submittal, which is the permit for the overall COA improvement project, is due right
before Thanksgiving.
C. Design Services for COA Improvements:
I. The final layout for the storage tank and the pump station is being evaluated. Mr. Boddy distributed to
those in attendance two maps, which identify the location of the pump station and storage tank, with
shaded areas indicating where excavation will be required. Mr. Boddy provided a brief summary of the
design. The Legal and Engineering Services Committee is recommending that the Authority include a
storage building next to the wet well, since only one wall and a roof would need to be added.
2. Mr. Boddy developed a memorandum to go over the construction technique that Wade Trim is
recommending. A number of construction techniques have been evaluated. Taking into account the
upsizing of the tank to 7 million gallons, the costs are estimated to be $5.6 million for a poured-in-place
tank, and $4 million for a specification type A WW A D II 0 tank. Based on this cost difference, Wade
Trim is recommending the D II 0 tank. This evaluation was reviewed with the Legal and Engineering
Services Committee.
3. A technical memorandum was provided to Solicitor Campfield, regarding a storage tank cover.
4. Mr. Boddy met with A WK, the geotechnical engineer, who is looking at the rock striations in the hillside,
to determine the best location for the storage tank. Based on A WK 's evaluation, there is a good level of
rock, with a 20 foot excavation. The tank will be 45 feet tall. The floor elevation will be at 930 feet, the
tide water depth will be at 975 feet, and the finished grade will be 940-945 feet. The storage tank will be
sticking out of the ground about 30 to 35 feet, plus the dome cover.
5. Mr. Lapia asked if the DIIO tank was the type with the wire on the outside of the tank. Mr. Boddy stated
that it was. Mr. Lapia asked if there was a difference in the life of the two types of tanks. Mr. Boddy
stated that, as long as the equipment is maintained properly, the life expectancy is similar. With a D I I 0
tank, it is necessary to inspect the compression, to make sure that it is not eroding. Poured-in-place tanks
must be checked for cracks and leaks. Both types of tanks should be inspected every two years. Mr.
Boddy stated that Wade Trim's structural engineer recommended the DIIO tank. The structural engineer
typically works with poured-in-place tanks, but he feels that this would be a good application for the
DIIOtank.
6. Mr. Boddy stated that constructing an alternate access road would be cost-prohibitive, and the plant
personnel would not be going to the storage tank often. The cost could be as much as $100,000.00 to
construct a second access road, and the Authority would need to obtain a right-of-way from West Penn
Power Company.
7. Mr. Boddy developed a technological memorandum regarding utility access for the pump station, which
will be located across Route #993 from the plant. Estimated costs to run the utilities under Route #993 in
casings are $671,000.00. Another option would be putting the utilities into a utility tunnel, similar to the
utility tunnel that is located behind the final clarifiers. Utility tunnels are typical for wastewater treatment
plants, as they provide a way to run several utilities through small spaces, they provide access for future
maintenance, and they provide an access for plant personnel. The additional cost for the utility tunnel
would be approximately $500,000.00. Mr. Boddy stated that the numerous incidents of fence damage
Western Westmoreland Municipal Authority
August 21,2014
Page 2 of6
due to vehicles show the danger to employees that exists at the plant entrance. Mr. Caroline stated that he
feels that Mr. Boddy's est imates for the difference between boring and construction of a util ity tunnel are
inaccurate, the cost difference will be a lot greater, and the costs to put up the detour signs and future
maintenance of the tunnel make the tunnel a bad idea. A lengthy discussion regarding the construction of
a utility tunnel fo llowed, with major concerns being additional costs, safety to employees, Penn Dot's
requirements regarding site distances and entrances, the possibility of moving the plant entrance to
another location, and the abi lity to lock access to the utility tunnel. After deliberation, a motion was
made by Mr. Wolinsky, and seconded by Mrs. Mcintyre, to go with the recommendation of the (General)
Manager and Engineer, to do the tunnel ac ross the road. Mr. Knouse asked what the distance was from
the proposed new road, to the lower road. Mr. Boddy stated that the difference is between 120 feet and
150 feet. Mr. Caroline asked if it would be a better idea to move the main entrance to the lower area.
Mr. Fisher stated that the Authority is trying to save the grassy area for another clarifier. Mr. Campfield
stated that the Authority may need to elim inate one of the existing entrances, if a new entrance is
constructed. Mr. Fisher stated that large delivery trucks would have trouble entering the plant, if the
location is moved. Mr. Wayman stated that this discussion was not relevant to the motion regarding the
utility tunnel. A roll-call vote was requested.
Ms. Balsamico - yes
Mr. Lapia - no
Mr. Wayman - yes
Mr. Caroline - no
Mrs. Mcintyre - yes
Mr. Wolinsky - yes
Mr. Knouse - yes
Mr. Watson - yes
The motion passed, 6-2.
8. The 60% design has been submitted to Mr. Fisher and the members of the Lega l & Engineering Services
Committee, for their review. Mr. Boddy stated that the information will be forwarded to any other Board
Members who would like to see it. The design has been broken down, into two contracts. A number of
different alternatives have been evaluated, and routes are being refined. Mr. Boddy brought in a stream
bank stabilization expert from Wade Trim, to wa lk the Brush Creek interceptor route. A few places have
been identified, in which the alignment of the sewer line will be moved from one bank, to the other, due
to instability of the bank. Paintertown rai lroad borings are being evaluated. The PAL bal l fields are
being evaluated. Some areas in the Bushy Run Interceptor are being evaluated, as a result of the
recommendat ions of Gibson Thomas Engineering, Inc., in their second opinion review.
9. Wade Trim is beginni ng work on the draft permits for the interceptor portion of the project, and is
working on figures for the geotechn ical boring that will be required for the permitting process.
10. Mr. Boddy rep01t ed that the Legal & Engineering Services Committee discussed the two types of pipe
that could be used for the interceptors: PVC (plastic) pipe and reinforced concrete pipe (RCP). There
were some differences of opi nion, regarding which type of pipe should be used for pipe with diameters of
36" and larger. PVC pipe requires the use of bedding to form a solid base for the pipe, so it is important
to get the proper bedding, in order to maintain structural integrity in the future. Mr. Boddy and the Legal
& Engineering Services Committee members were in agreement, in that PVC pipe should be used for
smaller diameters (less than 36"). There was a disagreement among the comm ittee members, however,
regarding the use of PVC pipe for diameters of 36" or greater. Wade Trim is recommend ing that all
piping for Paintertown, Manor, and Bushy Run be PVC. Mr. Boddy stated that he has reached out to
manufacturers of PVC pipe, in an attempt to locate PVC pipe in large r diameters, and he stated that it is
difficult to find PVC pipe in larger diameters. Mr. Boddy stated that his larger clients prefer concrete
pipe for larger diameters, due to the structural stability of the pipe. The break-even point of PVC pipe
versus concrete pipe is at 30". PVC pipe is less expensive than concrete pipe for diameters that are less
than 30". A lengthy_discussion followed, with major concerns being buoyancy of the portions of the
interceptor that are located within the stream, structu ral stability of the pipe, ease of pipe installation,
cost, and testing requ irements. Mr. Boddy recommended concrete pipe for diameters of 36" or more, due
to the structural stability of the pipe, itself, and because concrete pipe can be inspected as each section is
installed, while the PaDEP requires that deflection testing of PVC pipe take place 30 days after
installation. Deflection testing is not required for concrete pipe. After deliberation, a motion was made
by Mrs. Mcintyre, and seconded by Mr. Watson, to direct the Engineer to use concrete pipe in sizes 36" 48". Mr. Wolinsky asked what the cost savings would be with concrete pipe. Mr. Boddy stated that the
cost savings would be approx imately $500,000.00, due to the higher un it cost for the larger diameter PVC
pipe, and the higher bedding cost for PVC pipe. Mr. Wayman asked if a Board decision was requ ired,
this evening. Mr. Boddy stated that a decision needs to be made, by the September 18, 2014 meet ing.
Western Westmoreland Municipal Authority
August 2 1,2014
Page 3 of6
Mr. Lapia stated that information should be submitted to the Board ahead of time, when a decision must
be made. Mr. Lapia stated that he missed the last Legal & Engineering Services Committee meeting, but
he fee ls that the rest of the Board should receive the information, as well as the comm ittee. Mr. Boddy
stated that he is working hard to get the information to the Board as quickly as it is available, but he
stressed that the design must be submitted to the PaDEP in November, and there is a very small
timeframe. Mr. Knouse asked what the recommendation of the Legal & Engineering Services Comm ittee
was. Mr. Carol ine stated that he is against the use of concrete pipe, as was the engineer who completed
the second review. Mr. Caroline stated that he spoke with other engineers, who recommended the use of
PVC pipe. Mr. Caroline stated that concrete pipe is antiquated. Ms. Balsamico asked what the benefit
was, of using innovative (PVC) pipe, versus concrete pipe. Mr. Boddy stated that he wou ld disagree wi th
the statement that PVC pipe is "on the cutting edge". Mr. Boddy stated that over 90% of pipe of this
(larger) diameter that is being installed today, for sanitary sewers, is concrete. Mr. Caroline stated that he
strong disagreed with Mr. Boddy's statement. A motion was made by Mrs. Mcintyre, and seconded by
Mr. Watson, to direct the Engineer to use concrete pipe in sizes 36"- 48". Mr. Wolinsky asked Mr.
Boddy if he previously reported that there was a cost savings, with the use of concrete pipe. Mr. Boddy
stated that there is a projected cost savings of$500,000.00. Mr. Wolinsky asked if the Legal &
Engineering Services Committee discussed the cost savi ngs. Mr. Boddy stated that the price for PVC
pipe is $ 163.00 per linear foot. The cost for concrete pipe is $126.00 per linear foot. Mrs. Balsamico
asked if there was a benefit for the price difference. Mr. Boddy stated that the price difference is due in
part to demand, because there is more demand for concrete pipe. Mr. Caroline stated that the delivery
cost will be more for concrete pipe, because of the weight. Mr. Boddy stated that the quoted prices
include del ivery. Ms. Balsamico stated that the $500,000.00 savings could be applied to the uti lity
tunnel. A roll-call vote was requested.
Ms. Balsamico - no, stating that she preferred the innovative material
Mr. Caroline - no
Mr. Knouse - yes
Mrs. Mcintyre - yes
Mr. Watson - yes
Mr. Wolinsky - yes
Mr. Lapia - no
Mr. Wayman - yes
The motion passed, 5-3.
Wade Trim has composed a list of properties that wi ll require easements, and a listing of properties for
which title searches have already been completed. Mr. Boddy stated that he and Mr. Fisher are
recommending that the dimensions of the rights-of-way be 30 foot permanent right-of-way/50 foot
construction right-of-way for sewers under 30" in diameter, and 40 foot permanent right-of-way/60 foot
construction right-of-way for interceptors in which pipe with diameters of36" or larger will be used. The
current rights-of-way are 20' permanent, and had a 30' construction easement. Mr. Campfield referred to
Agenda Item No. 9A, regarding approval of Lawyer's Abstract Company of Westmoreland County's
proposal to perform additional title searches, stating that the number of required title searches may
increase. Mr. Boddy stated that there may be an additional twelve proper1ies that will require title
searches, due to the change in area dimensions for some of the rights-of-way. Mr. Boddy stated that 90%
of the properties that wi ll require rights-of-way have been identified, but the Authority cannot proceed
with right-of-way acquisition until the design is completed, because alignments can change during the
design process. Mr. Campfield stated that the Authority wi II need approximately I I I rights-of-way. Mr.
Campfield stated that the Authority may need to meet with Mr. Larry Gasparato, of Penn Vest, as the
Authority needs to have all properties issues solved, before a Penn Vest loan can be approved. A lengthy
discussion followed. A motion was made by Mr. Lapia, and seconded by Mr. Knouse, that the rights-ofway will be 30 foot permanent/50 foot construction (for pipe that is less than 36" in diameter), 40 foot
permanent/60 foot construction, (for pipe that is 36" or greater in diameter). The motion passed
unanimously.
12. The Act 537 Special Report was submitted to the PaDEP. The on ly outstanding item was the Resolution
fi·om North Irwi n Borough. Mrs. Mcintyre stated that North Irwin Borough Council only meets four (4)
times per year, and the Resolution was approved, at the July meeting.
II.
This concluded Mr. Boddy's Engineer's report. The complete report is attached to these minutes.
8.
Solicitor's Report - John Campfield:
A. Mr. Campfield referred to the proposal from Lawyer's Abstract Company of Westmoreland County that was
distributed to those in attendance, for the completion of 36 additional ti tle searches, at an estimated cost of
Western Westmore land Municipal Authority
August 2 1,20 14
Page 4 of6
$3,500.00 - $4,000.00. A motion to approve the proposal was made by Mrs. Mcintyre, and seconded by Mr.
Lapia. The motion passed unanimously.
Mr. Campfield stated that the other items on his report will be discussed during the executive session.
B.
This completed Mr. Campfield's Solicitor's rep011.
9.
Reports of Committees:
A. Grounds and Maintenance Committee -Joseph Lapia:
I. Mr. Lapia stated that the bushes in the front of the building need to be trimmed.
B. Personnel Committee- Mark Wolinsky: Mr. Wolinsky stated that there are items to be discussed during the
executive session.
C.
Finance and Budget Committee- Joseph Knouse:
I. Mr. Knouse requested Board authorization to invest the proceeds from two 20 I 0 Capital Improvement
Fund United States Treasury Bills that are scheduled to mature on August 21,2014, with a two-month
United States Treasury Bill, with a maturity amount of$1,500,000.00, providing the interest rate is
positive. A motion to approve the investment was made by Mr. Watson, and seconded by Mrs.
Mcintyre. The motion passed unanimously.
2.
Mr. Knouse requested Board authorization to invest the proceeds from a 20 I 0 Capital Improvement Fund
United States Treasury Bill that is scheduled to mature on August 21, 2014, with a one-month United
States Treasury Bill, with a maturity amount of$1,280,000.00, providing the interest rate is positive. A
motion to approve the investment was made by Mr. Watson, and seconded by Mr. Lapia. The motion
passed unanimously.
3.
Mr. Knouse requested Board authorization to invest the proceeds from a 2010 Debt Service Fund United
States Treasury Bill that is scheduled to mature on August 21,2014, with a twelve-month United States
Treasury Bill, with a maturity amount of$1,354,000.00, providing the interest rate is positive. A motion
to approve the investment was made by Ms. Balsamico, and seconded by Mr. Caroline. The motion
passed unanimously.
This concluded the Finance and Budget Committee repo11.
D. Insurance Committee- Due to Mr. Brough's absence, there was no report.
E.
Legal and Engineering Services Committee- Stan Caroline: Mr. Caroline had nothing to add to Mr. Boddy's
report.
F.
Safety Committee- Due to Mr. Konkus' absence, there was no report.
G.
Labor Contract Negotiating Committee- Mark Wolinsky:
I. Mr. Wolinsky stated that there are items to be discussed during the executive session.
II. Requisitions: Mr. Wayman presented the following requisition with the motion to approve as follows:
A. 2010 Capital Improvement Fund Requisition No. 38, in the amount of$86,683.43. A motion to approve was
made by Mr. Knouse, and seconded by Mr. Lapia. The motion passed unanimously.
12. Board Member Comments:
A. Mrs. Mcintyre noted the passing of Ms. Pat Altman, former WWMA Board Member. Mr. Wayman stated
that Ms. Altman was very active in the community, for many years. Mr. Fisher suggested that the Solicitor
prepare a Resolution acknowledging her diligence in working on the Board for ten years, and that the Board
adopt the Resolution, next month. Mr. Wayman asked Mr. Fisher to arrange for presentation of the
Resolution to Ms. Altman's family members.
13. Executive Session: A motion was made by Mr. Wolinsky, and seconded by Mr. Knouse, to enter into an
executive session to discuss litigation and personnel issues. The motion passed unanimously. The time was 7:55
P.M.
A motion to return to the regular order of business was made by Mr. Knouse, and seconded by Mrs. Mcintyre.
The time was 9:08 P.M.
A motion was made by Mr. Lapia, and seconded by Mr. Watson that, per the Collective Bargaining Unit, we
move Robb (Robert) Adair to the position of Chief Operator, pending consultation with our labor solicitor, on the
particulars on how to do that, for a thirty-day period. The motion passed unanimously.
A motion was made by Ms. Balsamico, and seconded by Mr. Lapia, to approve the dome for the wet weather
storage tank. The motion passed, 7- I, with Mr. Caroline voting against the motion.
Western Westmoreland Municipal Authority
August 21,2014
Page 5 of6
14. A motion to adjourn the meeting was made by Mrs. Mcintyre, and seconded by Mr. Knouse. The motion passed
unanimously. The time was 9: I0 P.M.
Western Westmoreland Municipal Authority
August21 , 20 14
Page 6of6
AGENDA ITEM # 7
GENERAL MANAGER’S REPORT
August 21, 2014
1.
Developer Planning Modules:
a.
b.
c.
d.
e.
f.
g.
2.
Prepared a Non-Residential Capacity Fee Agreement for a change in use/expanded use capacity fee for the
new Pasquarelli restaurant to be located in the former Medicine Shoppe store along Route 30 in Irwin
Borough.
Waiting on PaDEP approval of the Speedway planning module in Penn Twp.
Brookhaven Development – Signed and forwarded PaDEP planning modules to Penn Twp and N.
Huntingdon Twp. Prepared a PaDEP Developers Agreement for 51 EDU’s needed in 2016 for the N.
Huntingdon portion of this development. Mr. Shuster will be securing 39 EDU’s for the Penn Twp portion of
this project tomorrow.
Bortz Plan #2 - signed and forwarded the PaDEP planning module to Manor Borough. Issued three (3)
capacity permits for this subdivision.
Villas at Buena Vista – Received PaDEP planning modules for 45 EDU’s for this townhouse PRD development
in N. Huntingdon near Altman Farms. The developer is securing 10 taps from our 2014 TAP, and will be
signing a PaDEP Developers Agreement for the balance of the 35 EDU’s in 2016.
Kenny Ross GMC Dealership in N. Huntingdon (1 EDU) – issued their capacity permit for 1 EDU.
Cooper Project – received PaDEP planning approval on June 26, 2014. Capacity permit has been issued.
Plant Operations: In general, the quality of the plant discharge for June was in compliance with the discharge permit and
there were no discharge permit violations for the month. During the month, a total of 3.17” inches of precipitation was
th
recorded at the Plant rain gauge. There was one day of significant rainfall during the month, that being on July 19 ,
(0.94”). Maximum plant flow of 3.43 MGD occurred on July 29th.
In June, the centrifuge was operated fifteen (15) days, dewatering 730,271 gallons of sludge, resulting in the disposal of
172.25 wet tons (39.15 dry tons) of sludge as the result of operations.
3.
Plant Maintenance:
• Drained and cleaned primary clarifier #1 due to a high torque trip on the cross collectors from rags and
other debris causing one of the chains jumping off the sprocket. Serviced and greased the bearings,
tightened the wear track and flight shoes while it was out of operation, replaced one cross-collector flight.
• Replaced the sonic start probe and starting module on the degritter pump.
• Changed the gear box oil in both final clarifiers.
• Changed the air filters in the VFD panels for the return pumps (4), primary pumps (2) and centrifuge (1).
• Replaced the sludge scrapper on the serpentex conveyor.
• Replaced the pulls and hinges on the diversion box grating with stainless steel.
• Painted a 6” wide yellow band around all pits and underground boxes and labeled “Confined Space – Entry
Permit Required”
• Working on repairing aeration blowers 1, 4 & 6.
• Drained and cleaned aeration tanks 4, 5 and 6. Repaired/replaced portions of the air diffuser lines that
were broken and/or loose. Replaced fifteen rubber diffusers. Greased aeration tanks 4, 5 & 6 isolation
sluice gates.
• Cleaned rags from the thickener diversion box twice during the month. This is an ongoing maintenance
item that is being scheduled for once a week in an attempt to keep some of this material from getting into
the digesters.
• Raised 23 manholes in and along Route 993 between Kee Road and Fundistown Road on the Ardara
Interceptor.
4.
Consent Order & Agreement:
a. There were no SSO’s or CSO’s in July.
b. Had several meetings with Wade Trim regarding the general layout of the pump station building, wet well
configuration, influent screening devices, and odor control.
c. Coordinated WWMA’s efforts with the member municipalities and authorities in adoption of the Act 537
Special Study.
Board Report
August 21, 2014
Page 2
5.
Aeration Blower VFDs (Variable Frequency Drives): The two (2) 75 HP VFDs that were ordered from Mosebach Electric
were received on July 2, 2014. Scheduling installation of the drives with Schulthesis Electric. Taken blowers 4 & 6to
Casco for repairs. These will probably be sent back to the factory for repairs and service.
6.
Industrial Appraisal Company: Industrial Appraisal was in on Tuesday, August 12 to finalize their field work.
7.
PaDEP Laboratory Accreditation Inspection: Stan Gorski finalized the response to the PaDEP concerning the Laboratory
th
Assessment Report and was sent on August 7 . Stan Gorski, Robb Adair and myself attended a training class in
preparation of taking the PaDEP Lab Supervisor exam.
8.
New Plant Fence Damage: Payment was received from the insurance company and Michael Howard was here on August
th
th
7 and 8 making the necessary repairs.
9.
North Huntingdon Service Area Issue: To be discussed in executive session.
th
10. PTSA Issue: To be discussed in executive session.
11. Chapter 94 Flow Information:
Month
January
February
March
April
May
June
July
Yearly Average
3 Month Maximum
Average flow
(MGD)
3.39
4.33
3.26
3.30
3.39
3.27
2.52
Max daily flow
(MG)
6.22
12.60
7.98
6.64
6.26
5.70
3.43
3.35
3.66 (January, February, March)
Organic Loading
(7,490 Lbs/day)
5,149
5,694
5,464
6,293
5,476
4,935
5,909
5,560
Notes: (1) PaDEP allows WWMA to use 7.2 MGD as our annual average wet weather flow.
The 3 month maximum rolling average cycle runs through the calendar year beginning with January.
Macintosh HD:Users:kpfisher:Documents:Board Meetings:Year_2014:08-21-14.doc
Western Westmoreland Municipal Authority
ENGINEERS REPORT
August 21, 2014
Major engineering activities for the month are summarized below:
SOLIDS PROCESSING AND PLANT IMPROVMENTS PROJECT
• Project Status:
•
•
Miscellaneous punch list items
Change Orders:
- There are no change order requests this month.
Payment Requests:
- Contract One: Waiting on final closeout paper work from Wayne Crouse, Inc.
to process last payment.
- Contract Two: A Payment Requisition was not submitted by TSB,Inc. (d.b.a.
Schultheis Electric) this month.
- Contract Three: Waiting on final closeout paper work from Wayne Crouse, Inc.
to process last payment.
WET WEATHER ISSUES
• COA / LTCP / CAP / TAPR:
-
Upcoming Critical Dates:
3rd Quarterly Report due on October 30, 2014
Part II Submittal for COA Improvement Project due to DEP on Nov. 21,
2014
DESIGN SERVICES FOR COA IMPROVEMENTS
• Storage Tank and Pump Stations Basis of Design
- Evaluating various layouts of the storage tank to minimize costs
- Developed construction technique memo to L&E
- Provided Technical Memo to John Campfield regarding storage tank cover
- Met with AWK to discuss final foundation elevation of storage tank
- Evaluated multiple routes for access road to pump station and storage tank
- Developed memo regarding potential utility tunnel between WWTP and new
pump station.
Wade Trim, Inc.
One Gateway Center
420 Ft. Duquesne Blvd.
Suite 1350
Pittsburgh, PA 15222
B U I L D I N G
R E L A T I O N S H I P S
O N
A
F O U N D A T I O N
412.454.5566
412.454.9001 fax
www.wadetrim.com
O F
E X C E L L E N C E
P age |2
•
Interceptor Design
- 60% drawings of interceptor improvements have been provided to Kevin Fisher
and offered to Legal and Engineering Committee.
- Developing draft permit submittals
- Walked Brush Creek to evaluate stream bank stabilization requirements
-
-
Developed figures to facilitate discussions with private property owners for
access for geotechnical borings along proposed interceptor alignment
Drafted responses to Gibson Thomas 2nd Opinion Review comments
Evaluated alternative interceptor routes
Paintertown railroad bore
PAL Field
D/S portion of Brush Creek
Sections of Bushy Run based on 2nd Opinion Review comments
Compiled cost comparison of PVC vs. RCP pipe
Received response from DEP regarding applicability of pipe bursting of ACP
Compiled list of properties that will require easements and which ones have
already had title searches completed
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Special 537 Special Study
- Received municipal resolutions from all municipalities except North Irwin which
is expected in August.
- Submitted final Act 537 Special Study to DEP on August 7 as required by COA.
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Miscellaneous
- Completed Chapter 94 Consistency determinations for the Bortz Plan #2 in
Manor Borough and Charles Gongaware Plan in North Huntingdon Township.
Respectfully Submitted,
WADE TRIM, INC.
Bradley M. Boddy, PE
Project Manager
TECHNICAL MEMORANDUM
TO:
Kevin Fisher
FROM:
Brad Boddy
DATE:
August 5, 2014
SUBJECT:
WWMA COA Improvements Project
EQ Tank Construction Approach Recommendation
Wade Trim Project #WWM 2005-01H
Introduction
Western Westmoreland Municipal Authority (WWMA) is in the process of developing final
engineering documents for construction of a 7 million gallon wet weather flow equalization (EQ)
tank. The tank will be constructed on an adjacent property, which is currently zoned as
residential. The topography is dominated by a steeply sloped hillside terminating in a relatively
small flat area at the apex, where the tank will be located.
A number of construction techniques were evaluated to determine the most cost effective
approach for the construction of a 7.0 MG EQ tank. Previously the Authority evaluated the
following construction techniques:
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Above Ground Cylindrical Cast-In-Place Concrete Tank, without prestressing.
Above Ground Wire-and Strand-Wound Circular, Prestressed Concrete Tank (D-110).
Above Ground Tendon-Prestressed Concrete Tank (D-115).
Above Ground Rectangular Cast-In-Place Concrete Tank.
Above Ground Steel Tanks
Below Grade Rectangular Cast-In-Place Concrete Tank
At that time, the above ground cylindrical cast-in-place concrete tank, without prestressing and
above ground wire-and strand-wound circular, prestressed concrete tank (D-110) techniques
were selected as the preferred construction approaches based on cost and familiarity with the
construction techniques.
Structure Option I – Cylindrical Cast-In-Place Concrete Tank
The first option being further evaluated is the construction of a cylindrical cast-in-place concrete
tank. The diameter of the tank would be approximately 160 foot diameter with a side water
depth of 45 feet.
This type of structure would utilize a cast-in-place mat foundation bearing directly on the preexcavated site. The slab would have dowels that extend into the concrete walls, developing
fixity at the base of the walls. The lateral pressure caused by the water inside the tank when full,
would be resisted by reinforcing steel in the walls acting as hoop or tension steel. Vertical
reinforcing would be installed to develop the fixity at the base of the walls. The design of this
structure will conform to the design requirements of ACI-350 and will follow the design
procedure based on Portland Cement Association – “Circular Concrete Tanks Without
Prestressing”.
This structure could be constructed with an open top, or could have a roof. There would be
several options for the roof construction including the following;
1. Flat slab and beam system with interior columns.
2. Cast-in-place concrete dome
3. Prefabricated aluminum dome cover.
For the costing portion of the evaluation a cast-in-place flat slab and beam system has been
evaluated, and the associated cost of this type of roof structure has been incorporated into the
overall capital costs for the structure.
Figure 2.1A
Construction of a Cast-in-Place Circular Tank Without Prestressing
Cylindrical Cast-In-Place Concrete Tank Structures consist of conventional concrete
construction, which are typically built by local forces. This competitive bidding environment
typically results in low unit pricing for this type of construction. The specialty construction
associated with post tensioning is not required which results in a more competitive bidding
environment. The overall concrete quantities required for a non-prestressed structure, however,
are typically greater. This increased quantity of materials results in an increased cost which may
exceed the credit recognized in the competitive pricing.
The design of this type of structure will be based on ACI 350. By following the design
requirements of ACI – 350, the resulting structures are typically quite robust. This is because
additional design restrictions are imposed on the designer to ensure that the structure will
remain durable when exposed to the aggressive environments that are common in waste water
applications. The resulting structure will have an improved life expectancy over structures that
do not have the restrictions of ACI-350, and its’ requirements for waste water treatment
facilities. These additional design restrictions not only extend the durability and life expectancy
of the structure, but also result in a structure that requires less annual maintenance expenses.
The lack of prestressing, however, leads to a structure that has a higher likelihood of developing
leaks as the concrete is placed in tension. These leaks require regular maintenance to maintain
the structures integrity. To prevent or minimize these leaks, that typically occur soon after
construction, an interior coating system can be installed on the interior surface of the base slab
and walls. This coating will minimize potential leaks, but will add capital cost to the project.
The storage volume for circular structure relies on the cylindrical shape of the structure to
provide structural integrity to the tank. This limits the ability to expand the tank and efficiently
accommodate future expansion, if additional volume is desired in the future.
Because the structure consists of conventional construction techniques this structure type is
relatively common, and can be completed with conventional equipment. For this reason the
spatial requirements for construction are limited, and the ability to safely construct the facility in
the proposed location is realized.
A conventionally reinforced cast-in-place concrete structure is probably the most common type
of structure associated with waste water treatment facilities. Because this type of construction is
very common for this use, the designers and owners of waste water treatment facilities are very
comfortable with the reliability, maintenance and durability of these types of structures.
Structure Option II – Wire-and Strand-Wound Circular, Prestressed Concrete Tank
The second option being further evaluated is the construction of a Wire-and Strand-Wound,
Circular, Prestressed Concrete Water Tank. The dimensions for this type of tank would be very
similar to the dimensions of the Cylindrical Cast-In-Place Concrete Tank. The diameter of the
tank would be approximately 160 foot diameter with a side water depth of 45 feet.
This type of structure would utilize a flexible, slab-on-grade bearing directly on the preexcavated site. The slab would typically be relatively thin with a thickened ring around the
perimeter to support the weight of the walls, and roof.
There are four types of wall construction for this type of structure, they are as follows:
1.
2.
3.
4.
Cast-In-Place Concrete Wall with vertical prestressed reinforcement.
Shotcrete with a steel diaphragm.
Precast Concrete with a steel diaphragm.
Cast-In-Place Concrete with a steel diaphragm.
The walls of the tanks typically are pinned at the base to prevent the development of moments
in the base of the wall. The lateral pressure caused by the water inside the tank when full, would
be resisted by the wire and strands which are wound around the core wall. These strands are
tensioned when installed to place the core wall into compression. After the wire and strands are
installed, several coats of shotcrete are applied to provide protection to the reinforcing wires.
The design of this structure will conform to the design requirements of ACI-350 and will follow
the design procedure based on the American Water Works Association – AWWA – D110, “Wireand Strand-Wound, Circular, Prestressed Concrete Water Tank”.
Figure 2.2A
Wire-and-Strand –Wound Circular, Prestressed Concrete Tank
This type of tank would typically have a domed roof, constructed of cast-in-place concrete. This
dome would typically have conventional reinforcing, and the concrete would be relatively thin,
compared to a flat roof system.
Wire-and-strand wound circular, prestressed tank consist of a core wall and a steel diaphragm.
This core wall is then wrapped with pretensioned steel strands which place the concrete core
wall into compression. The equipment used to install the prestressing strands is proprietary
equipment which limits the number of contractors capable of bidding on the project. Because
the bidding is less competitive than conventional construction, the unit costs of the installation
are typically higher for this type of structure. The design requirements for this type of structure,
however, are less than a conventionally reinforced structure resulting in a considerably lighter
structure with thinner walls and thinner base and roof slabs. The reduction in construction
materials typically will result in a structure that is considerably less expensive than a
conventionally designed structure.
The design of this type of structure will be based on ACI 350, which allows thinner walls and
less concrete cover than for cast-in-place concrete. Because there is reduced cover, the overall
durability of the structure is reduced. Because the durability is reduced the required inspection
requirements are increased and the associated annual maintenance costs are increased.
Because the inner wall is post-tensioned, however, these structures typically have less leaks
after construction, and therefore less maintenance requirements immediately following
construction.
The storage volume for circular structure relies on the cylindrical shape of the structure to
provide structural integrity to the tank. This limits the ability to expand the tank and efficiently
accommodate future expansion, if additional volume is desired in the future.
The post tensioning or wire wrapping activity during construction requires a slightly larger
construction access footprint. Also the erection of the center core wall will typically require a
larger crane during construction. This requirement will increase the difficulty of accessing the
site at the top of the hill with the required construction equipment.
Only the circular type storage tanks utilize this construction technique of post installed wire
wrapping. Though this type of construction is less common at waste water treatment facilities
than is cast-in-place concrete construction, the wire wound type of structure has a long reliable
history for equalization tanks of this size. Because there is a long history of utilizing this type of
structure, the reliability of this type of structure is relatively high.
Cost Comparison
Construction cost estimates were developed for both a poured-in-place tank and D-110 post
tensioned tank. For each of these estimates that tank was assumed to be 160 foot in diameter
with a 45 foot side water depth and include a cover. The following estimated construction costs
were determined:
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Cylindrical Cast-In-Place Concrete Tank Pour-in-Place: $5.6 Million
Wire-and Strand-Wound Circular, Prestressed Concrete Tank (D-110): 4.0 $Million
These estimates are for the construction of the tanks once the site has been prepared for the
installation of the tanks. Therefore the cost of the required earthwork to prepare the site is not
included.
Recommendation
Based on the significant cost savings of the Wire-and strand-wound circular, prestressed
concrete tank (D-110) over the cylindrical cast-in-place concrete poured-in-place tank, it is
recommended that WWMA utilize the Wire-and Strand-Wound circular, prestressed concrete
tank.
BMB
WWM 2005-01H