HomeMy WebLinkAbout2007
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REPORT
ON THE
WASTEWATER SYSTEM
OPERATION AND MAINTENANCE
FOR THE
FISHERS ISLAND
SEWER DISTRICT
BY:
MICHAEL A. HORNE, M.S., P.E.
DTC PROJECT NO. 07-117-200
SEPTEMBER 2007
DIVERSIFIED TECHNOLOGY CONSULTANTS
556 WASHINGTON AVENUE
NORTH HAVEN, CT 06473
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INDEX
Introduction ............................................................................ Page 1
Background .......... ......... ..................................... ..... ........... .... Page 2
System General Description................................................... Page 2
Maintenance and Operation ................................................... Page 3
~ General........................................................................ Page 3
~ Pump Station ............................................................... Page 3
Community Septic System ..................................................... Page 4
Septic Tanks .......................................................................... Page 5
~ Community System Tanks........................................... Page 5
~ Cinema Tank ............................................................... Page 5
~ Coast Guard Houses Tank.......................................... Page 5
Silver Eel Cove System.......................................................... Page 5
Sewage Collection System..................................................... Page 5
Observations, Conclusions and Recommendations............... Page 6
~ Conclusions................................................................. Page 6
~ Recommendations....................................................... Page 7
Enclosure # 1 Maintenance Check List
Enclosure # 2 Discharge Monitoring Report - Field Report, May 9, 2007
Enclosure # 3 Discharge Monitoring Report DEC - May 21, 2007
Enclosure # 4 Operation and Maintenance Field Report - August 28, 2007
Enclosure # 5 Operation and Maintenance Abbreviated Report - Aug. 28, 2007
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INTRODUCTION
This report is written to conform with the requirements which were outlined in Item /I of our
contract with the Town of Southold on behalf of the Fishers Island Sewer District. It
includes maintenance evaluations of the Fishers Island sewer district sewers, the pump
station and wet well, the community leaching systems, the Cinema septic system and the
septic system which serves the three residences which overlook Silver Eel Cove. In
addition, the pump station and selected sewers were reviewed. Water and Waste
Equipment, Inc. is upgrading the pump station. The Community, Silver Eel Cove and
Cinema Subsurface Disposal Systems were inspected and septage, as well as effluent,
were measured. Harold's Construction Company provides service during the year.
The collection system in the area of Officer's Service Road has been added to the annual
review because of sewer clogging in the sanitary manholes during the past several years.
The results of the collection system review are enclosed in Enclosure 4 "Operation and
Maintenance Field Report May 2007."
The purpose of the field evaluations and this report are to identify operation and
maintenance issues and requirements. It should be noted that due to the age of the system
and corrosion, some major items must be replaced. In order to assist the operator and fulfill
a need, a maintenance checklist has been included in this report. (Reference Enclosure #
1). This checklist is tailored to normal operation and maintenance requirements.
Although the collection system has functioned well in the past, it will need several manhole
repairs and cleaning to prevent further clogging and backups. Conditions have changed
since the smoke testing program about fifteen years ago.
Attempts have been made to secure funding to remove five (5) catch basins from the
system. In order to accommodate a proposed community center, the stormwater must be
eliminated from the system, and the system must be upgraded prior to any additional
connections.
Fishers Island Sewer District
Report on the Wastewater System
Operation end Maintenance
During 2007
Page 1
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BACKGROUND
The Fishers Island sewer district includes the area of the south end of Fishers Island, which
was established during World War II as Fort Wright.
Based upon the 1943 Corps of Engineers map of the system, the sewer system consists of
about two miles of vitrified clay pipe, ranging from 6 inches in diameter to 24 inches. Prior
to 1985, a 24-inch diameter outfall sewer extended into Long Island Sound where raw
wastewater was discharged. The map was traced by the Suffolk County Planning
Department during 1964. Another large map was produced by the Henry Souther
Engineering Company during 1975. The title block was updated by James Sommers, P.E.,
L.S. Several copies of this map have been reproduced by DTC and sent to Louisa Evans
for the District's file and to Harold's Construction Co. for their use. The residents, the
highway department, the Fishers Island Water Department and others can obtain utility
information from the maps.
During the late 1970's and early 1980's F.I.D.C.O. purchased the Fort Wright area from the
Govemment, and the New York Department of Environmental Conservation (N.Y.D.E.C.)
issued an order to Southold to eliminate the discharge to the Sound. A wastewater facilities
plan, which included an activated sludge treatment plant system, was initially proposed. It
was concluded that a plant would result in excessive operation and maintenance.
Therefore, the current pump station and community septic system was developed,
designed and constructed in compliance with the order. The flow of wastewater into Long
Island Sound was eliminated. The system has consistently met N.Y.D.E.C. discharge
monitoring requirements. (See the Discharge Monitoring Report [DMR]). (Reference:
Enclosures #2 and #3).
SYSTEM GENERAL DESCRIPTION
The alternate community septic system scheme was accepted by the N.Y.D.E.C. This plan,
which was implemented during 1985, included installing a pump station adjacent to and
connecting the 24-inch diameter outfall to it via an 8-inch PVC line, plugging the 24-inch
outfall, constructing a large subsurface disposal system near the airport, constructing
another large subsurface disposal system to serve the Cinema and finally, construction of a
subsurface disposal system to serve the three houses which are on the hill above Silver Eel
Cove. The systems were constructed during 1985. Therefore, they are more than 20 years
old. Considering the ages of the systems and mechanical/electrical equipment, they have
served the residents well in the past. However, the pump station and the community
leaching field need upgrading. Maintenance of the system become more important as the
system ages.
Fishers Island Sewer District
Report on the Wastewater System
Operation and Maintenance
During 2007
Page 2
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MAINTENANCE AND OPERA TION
GENERAL
This section addresses maintenance and operation of the system. The Town of Southold
has contracted Harold's Construction Co. in the past to maintain the system with
consultation and specifications as needed from DTC. Harold's has operated and
maintained the system for years and personnel are familiar with it. During two field reviews
of 2007, Harold Cook and his personnel assisted in obtaining access to facilities, testing
them obtaining measurements and relating important performance information about the
system. In addition, during 2007 Harold's Construction Co. has continued to provide on site
services.
The maintenance requirements for the system in order of effort required are: 1) The pump
station and generator, 2) The community leaching field, 3) The sewer collection system, 4)
The Cinema system, and 5) The three Silver Eel Cove residences system. They will be
addressed in the following paragraphs based upon three site visits, numerous telephone
conversations and faxes, prior knowledge of the system, and examination of plans and
specifications.
A. Pump Station
The major components of the pump station are the submersible pumps, the wet-
well, the electrical controls, the valve pit including check valves, isolation plug
valves, a by-pass valve, and the generator. The fence, gate, a small spares
storage building, grounds and electrical power distribution equipment are part of
the station.
In order to maintain the pump station and order parts, the plans and
specifications are essential.
The key maintenance requirements include continuous observation of the pumps
and wet-well, checking the valves to assure proper seating of the check valves
and operability of the plug valves, monitoring the elapsed time meters on the
pumps to assure that the pumps are both working, check of vibration of the
pumps, observation of the wet-well for excessive debris and scum, cleaning the
valve pit and wet-well, exercise the generator, replace components in the
electrical control system and when they fail or failure is eminent, control rusting of
the facility by touch up painting with rustoleum and other corrosion inhibitors.
Rust control and cabinet sealing are important because of the proximity of this
pump station to Long Island Sound.
Fishers Island Sewer District
Report on the Wastewater System
Operation and Maintenance
During 2007
Page 3
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During May 2007 and August 2007, the writer visually inspected the pump station
and other parts of the wastewater system. The primary purpose during May was
to obtain flows for the annual Discharge Monitoring Report (DMR) for the
N.Y.D.E.C. During this work, the pump station was evaluated. One pump only
was operating satisfactorily; the other one was out of order. The one pump only
was pumping below capacity.
During the August 2007 review, Water and Waste Equipment, Inc. was upgrading
the pump station. During August 28, 2007, a detailed operation and
maintenance inspection and test was completed for the system. (See Enclosure
#4).
During the flow testing for the DMR, two methods were used to determine flow
into the wet-well. Based upon these measurements, it was concluded that the
north check valve (pump # 2) was not seating This allowed flow back into the
wet-well between pump cycles. A new check valve has been installed and
another will be installed soon.
B. Community Septic System
The major components of the community septic system are three, 10,000-gallon
septic tanks, 4-feet. x 4-feet. deep concrete leaching galleries which form 14
rows of a flow distribution system. The wastewater flows from the pump station
to the tanks. The grit and septage are removed in the tanks where it settles to
the bottoms. The wastewater flows from the tanks into a distribution system and
into the 14 sets of leaching galleries.
The community leaching system was visited twice, once May 9, 2007 and once
during August 28, 2007 in order to inspect various system components.
The inlet distribution, the tanks, the outlet distribution and the 14 rows of leaching
galleys were inspected. The depths of sludge were determined. The results are
in Enclosure # 4.
Distribution to the leaching chambers was observed. (See Enclosure # 4). In
general, the western 60 foot and 100 foot long galleys were partially filled. The
eastern galleys were not. Inlet # 3 of the eastern 100 foot galleys had 20 inches
of wastewater in it.
Inlet 1 and 2 of the western 60 foot galleys had 4 inches and 18 inches of
wastewater in them. Inlets 2, 3 and 4 of the 100 foot galleys had 21 inches, 36
inches and 22 inches of wastewater respectively. See Enclosure # 4.
Fishers Island Sewer District
Raport on the Wastewater System
Operation and Maintenance
During 2007
Page 4
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C. Septic Tanks
Community Tanks
The three 10,000 gallon tanks were pumped during 2002 to remove sludge
because they were filled to near excessive depths.
During August 28,2007, sludge depths were measured in the three tanks.
All of the sludge depths are shown in the Field Report of August 28, 2007 (See
Enclosure # 4). Based upon the measurements, the center tank first
compartment must be pumped and the east tank first compartment will need to
be pumped soon.
Cinema Tanks
The Cinema System consists of a 1,500-gallon septic tank followed by four by
four leaching chambers. Inspection of it reveals it is in excellent condition and
does not need improvements. Septage levels are very low.
Coast Guard Houses Tanks
The inlet sludge is 21 inches deep which is more than year ago. when a septic
truck is used for manhole cleaning or community system pumping, this should be
pumped.
D. Silver Eel Cove System (3 Houses)
This system serves three residences, which in the past were owned by the Coast
Guard. This system consists of a 1,500-gallon septic tank and a large precast
concrete leaching system consisting of large leaching chambers. It is in excellent
condition. No improvements are required. However, septage increased
significantly during the summer of 2004 from 12-inches to 21-inches. The
August 28, 2007 inspection revealed that the depth was at 21 inches. This
system requires pumping during the next several years. (See Enclosure # 4).
E. Sewage Collection System
The existing system consists of vitrified clay pipe, which normally cracks at the
bells or female fittings. Normally, groundwater flows into the system through
these cracks. This does not appear to be the case for the Fishers Island System.
However, at least four stormwater catch basins near Fox Lane are connected
into the system and contribute substantial amounts of inflow during rainstorms.
Elimination of this stormwater from the system was brought to the attention of the
Town of Southhold after smoke testing the system 15 years ago. A letter was
issued by A.R. Lombardi Associates requesting the repair and funding. It will be
addressed in our long-term improvement report because it costs to pump it and it
Fishers Island Sewer District
Report on the Wastewater System
Operation and Maintenance
During 2007
Page 5
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taxes facilities including the community leaching field. Sanitary manholes in the
Officers Service Road were inspected August 28, 2007. One sanitary manhole
should be pumped out because it is filling with debris. A little gravel should be
removed from another one and the top of one near landscape boulders should be
repaired.
F. Observations, Conclusions and Recommendations
Conclusions
During periods of non-rainfall and even during periods immediately following
rainstorms, the flow drops down. This indicates that the groundwater table is low
or it is not leaking into the sewers.
During 2001, the first clogging of the sewer with rags occurred and was resolved.
The clogging of manholes with paper, debris and pebbles has continued. The
manholes in the Officers Service Road should be monitored and cleaned before
back up occurs. (The obvious one is the service road sanitary manhole that
services the State Police Building). The manhole was observed to be clogged
and backing up into the upstream sewer. If not taken care of, this can result in
basement flooding. During 2007, the aforementioned manhole was again
clogging. Debris was observed in it.
The community leaching system distribution is not acceptable. The west galleys
are overloaded due to a clogged outlet to the eastern galleys.
Based upon review of August 2007, the following can be concluded:
v'" Clogged manholes in Officer's Service Road must be cleaned,
inspected and rebuilt inverts if necessary.
./' Upstream users must refrain from flushing materials like cloth
down the toilet.
v'" The flow distribution into the three tanks was unbalanced.
v'" The flow out of the distribution box to the leaching field was very
bad. The east pipe was entirely clogged. It must be unclogged or
dug up and repaired.
v'" Both pump lift out fixtures are severely corroded in the pump
station wet-well. (Both will be replaced by Water and Waste
Equipment, Inc.
v'" Pump out of septage from the three residential system near the
Silver Eel Cove system should be considered in the event that a
septic truck is used to clean manholes or pump out the community
system.
v'" The pump # 2 check valve is faulty. (Has been replaced).
Fishers Islend Sewer District
Report on the Westewater System
Operation and Maintenance
During 2007
Page 6
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" Six community leaching system frames and covers are either
broken or off-set from the manholes.
" The pump station upgrade and stormwater elimination must be
done before the community center can discharae to the svstem.
" The generator is non-operational and will be replaced.
Recommendations
" Continue pump station upgrade.
" The velocity in the force-main is too slow to move grit. Pump # 1
must be replaced.
" Remove grit and pebbles from the wet-well bottom
" Replace generator.
" Replace pump lift out assemblies. (Will be done by Water and
Waste Equipment, Inc.)
" Replace pump # 2.
" Remove solid soapy material from surface of wet-well when it
accumulates.
" Pump sludge out of first compartment center tank of community
leach field.
" Pump sludge from first compartment east tank of community leach
field.
" Pump out the septic tank first compartment Silver Eel Cove
residence system.
" Replace frames and covers in community leach field - See
Enclosure # 4 - Some open manholes should be covered
immediately.
" Unclog distribution pipe in the Bilco hatch covered distribution
chamber to balance the load to the leaching field. Pipe flowing
each is clogged.
" Remove material from the manhole near the Officer's Service Road
(parallel to Whistler Avenue) and opposite the State Patrol Office
Building.
" Carry out contract operations and maintenance.
" All of the above must be checked and tested.
S:\2007\07117 Fishers IsiandlO&M ReportlReport 2007.doc
Fishers Island Sewer District
Report on the Wastewater System
Operation and Maintenance
During 2007
Page 7
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ENCLOSURE # 1
MAINTENANCE CHECK LIST
-------------------
FISHERS ISLAND WASTEWATER SYSTEM
MAINTENANCE CHECKLIST
MAINTENANCE CHECK PERIOD
ITEM DAILY WEEKLY MONTHLY QUARTERLY SEMI-ANNUALLY ANNUALLY
1. Standby Generator (include check of fuel X
level))
2. Sensors and Alarm System X
3. Power Usage Records X (DTC)
4. Flow Total X
5. Flow Rate X
6. Automatic Transfer Switch X
7. Transducer System X
8. Pumps, Motor, Controls X
9. Remove Solids from Wet-Well Liquid X
Surface
10. Exercise Plug Valves* X
11. Observe Check Valves* X
12. Main Pump Mechanical (Check Alarm Light) X
13. Station Cleanliness X
14. Check Wet-Well Solids X
15. Check Community System Inlet Distribution X
16. Facilities Condition X
17. Mow LawnlBrush As Needed
18. Wet-Well Cleanout As Needed
19. System Inspection X (with DTC)
20. Pump Out Septic Tanks As Needed
21. Inspect Septic Systems X (with DTC)
22. Pump Tests to Determine Capacity X (with DTC)
* In Valve Pit
Note: All weekly items can be inspected during the weekly generator start-up. Visual observations are necessary.
S:\OOI89\I02\Rcoport Task l\MalnChecklistCharl.doc
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ENCLOSURE # 2
DISCHARGE MONITORING REPORT
FIELD REPORT, MAY 9,2007
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~~~~
tc "
LAND
ENGINEERED
STRUCTURES
SOLUTIONS
W ATIUl
May 11, 2007
The Honorable Louisa Evans
Fishers Island Sewer District
Fishers Island, New York 06390
RE: DMR and OIM
DTC Project No. 07-117-100
Dear Louisa:
A copy of the field report is enclosed.
Respectfully,
DIVERSIFIED TECHNOLOGY CONSULTANTS
~a,y~
Michael A. Home, P.E.
Associate
Enclosure: Field Report
cc with Enclosure: Harold's Construction Co.
8:\07117 Fishers Island\Letters\05-I1-07 Evans Field Report.doc
DIVERSIFIED TECHNOLOGY CONSULTANTS
556 WASHINGTON AVENUE NORTH HAVEN CT 06473 2032394200
!~.~ lfi,mL~D
~~~dU:~3Ll1 ' ~
,T-/j-07
203 234 7376 FAX
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EIIGIREERED
~
-----I--
~
WAfER
LAIID
SfRUCTURES
SOLUTIO..
FIELD REPORT
Page 1 of 4
May 9, 2007
8:00 a.m.
Sunny/Dry
OATE
TIME ON SITE
WEATHER
Fishers Island Sewer District
LOCATION
Check pump station, community system, cinema system, 3 Coast Guard System, and sewers
PURPOSE
Michael A. Horne, P.E.
REPORT BY
Fishers Island Sewer District
07-117-100
PROJECT NAME I PROJECT NUMBER
Personnel Present:
Harold Cook, Harold's Construction Company
Shawn Moniz, Harold's Construction Company
Mr. Beebe, Fishers Island Electric
Chad Marowka (Electrician, is familiar with the pump station)
1. Arrived at 8 a.m. and discussed day plan with Harold Cook, Paul and Shawn.
Shawn obtained manhole puller, bilco hatch latch opener and measuring stick for
septage and 4 x 4's.
2. Opened pump station hatch and noted pumps off, flooded about 4 feet. Pump # 1
was in run position, but was not running. Solid chunks of congealed soap were
floating an the surface.
3. Harold called Fishers Island Electric. Fishers Island Electric arrived and checked
the power supply. It checked out and corresponded with the pump station
electrical plans per Mr. Beebe. (Note: The Electric Company has had trouble with
this pole due to the corrosive atmosphere, lighting, etc. based upon our discussion.
4. The electrician, Chad Marowka, arrived, opened the main panel and verified that
the panel was energized.
He noted that the circuit breaker for pump # 1 was tripped out. He reset it and
turned on pump # 1. Pump # 1 sounded bad and re-tripped the breaker. We lifted
the check to back flush the pump later in the day. Chad, the electrician, returned
and tried the pump again to no avail. The pump # 1 is not operational.
5. Based upon Harold's suggestion, we opened the valve for pump # 2 and switched
to it at about 9:15 a.m. The pump requires about 4 hours to pump out the wet-well
and 24" sewer which extends back to the head of Silver Eel Cove by the Ferry
Dock.
6. Shawn removed the chunks of floating material from the wet-well.
7. During the pump down period, Shawn and I conducted the following work:
DIVERSIFIED TECHNOLOGY CONSULTANTS
SSG WASHINGTON ",VENUE NORTH HAVEN CT 06473 203 239 4200 203 234 7376 FAX
STAMFOR.D, CT ANDOVER, MA
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EII.,IlEUIEO
~
-----I------
~
wun
LAND
STRUCTUtlES
SOLUTIONS
1)
FIELD REPORT
Page 2 of 4
Community Leach Field System
a) Main bilco distribution box removed rags and debris and opened
outgoing pipes to provide equal flow distribution.
b) Check east mh - ok
c) Check west mh - ok
d) Check 3 10,000 gallon manholes for sludge depths.
. East in 36 inches out 16 inches
. Middle in 30 inches out 2 inches
. West in 17 inches out 2 inches
e) Second bilco hatch distribution box.
. No flow east.
NOTE: THIS CONDITION WAS REPORTED LAST FALL. THE
LINE NEEDS TO BE SNAKED.
. 1/3 of the field is not in use.
f) Distribution System - 4 x 4's
(6) 60 feet long
(8) 100 feet long
Numbered from Whistler Avenue.
100 footers west:
1 - Flow - no backup
2 - Flow 6 Y:z" backup
3 - Flow 11" backup
4 - Flow No backup
60 footers west:
1 - Flow No backup
2 - Flow No backup
3 - Flow 3" deep
60 footers east:
1 - Flow No backup
2 - Flow No backup
3 - Flow No backup
DIVERSIFIED TECHNOLOGY CONSULTANTS
556 WASHINGTON AVENUE NORTH HAVEN CT 06473 203239 "1200 203 2H 7376 FAX
STAMFORD, CT ANDOVER., MA
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SOLUTION'
~
----I--
~
LAIID
EIIQIMEUttD
'TRUCTURES
....UE.
FIELD REPORT
Page 3 of 4
100 footer east:
NO FLOW OUTLET PIPE from distribution box is clogged.
Conclusions: Considering that only 213 of the system is in use, the leaching
system is handling the wastewater well.
g) Cinema System sludge depth:
In - 1 inch
Out - 2 inches
h) Three (3) Silver Eel Cove house system
Inlet - 4 inches scum, 18 inches sludge
Outlet - 2 inches scum, 12 inches sludge
Conclusion: Near pump requirement.
i) Sanitary Manhole - Officers Service Road
A lot of sludge and debris in the manhole - it looks the same as it
did last fall. It needs cleaning or a backup could occur.
j) Note: Due to the pump malfunction, the 24" main and wet-well need
to be pumped down from 9:30 a.m. until about a 2:00 p.m. Some
residual flow was likely continuing. Assume solids dropped out in
the flat 24" pipe. We did not obtain the normal clear flow.
The flows were as follows:
Time Second Flow m
2:31 .m. 30 6 m
2.37 .m. 27 6.3 m
2:41 .m. 28 6.3 m
2:43 .m. 27 6.6 m
2.45 .m. 25 6.3 m
2:47 .m. 28 6.3 m
2:49 .m. 29 6.3 m
2:51 .m. 28 6.3 m
2:57 .m. 27 6.6 m
2.59 .m. 27 6.6 m
3:01 .m. 26 6.9 m
DIVERSIFIED TECHNOLOGY CONSULTANTS
556 WASHINGTON AVENUE NORTH HAVEN CT 06~73 2032394200 203234 7376 FAX
STAMFORD, CT ANDOVER., MA
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ENGIJlEERED
WIoTER
LAND
STRUCTURES
SOLUTIONS
FIELD REPORT
f
Paae404
Time Second Flow gpm
3.03 p.m. 27 6.6 gpm
(Note School
out 3:00
p.m.)
3:09 p.m. 25 7.1 gpm
(Note: Some
contractors
out 3:00 p.m.
+/-
AVE = 6.47 gpm / AVE was 5.27 aDm based upon June 19, 2006 readings,
one house has been connected to the lines = .104 gpm ave. flow/day.
.3 gpm peak flow.
The estimated flow for 7.66 hours is 5.47 gpm -1 gpm residual draining = 5.47 gpm
5.47 gpm - 1.00 gpm infiltration allowance = 4.47 gpm.
Daytime wastewater flow 4.47 gpm x 12 hours x 60 minlhour =
Night-time wastewater flow est. 1 gpm x 12 hours x 60 min/hour =
3,218 gpm
720 aDm
3,938 gpm
WE NEED TO CARRY OUT THE LIST RECOMMENDED OF ITEMS ON THE O/M SHEET
ATTACHED AS SOON AS POSSIBLE.
Attachment: List of Upgrade Items - 1996 Operation/Maintenance Review
S:107117 Fishers IslandlField ReportsI05-09-07.doc
DIVERSIFIED TECHNOLOGY CONSULTANTS
556 WASHINGTON A.VENUE NORTH HAVEN CT 06473 203 239 4200 203 234 7376 FAX
STAMfOR.D, CT ANDOVER, MA
5lif""' ~~,1
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./ Much debris was on the wastewater surface in the wet-well.
./ The generator is non-operational
Recommendations
./ The pump station transducer should be in a stilling well.
./' Pump station # 1 meets specification.
./ Pump station # 2 is below specification in flow. The velocity in the
force-main is too slow to move grit. Pump # 2 must be replaced.
./ The wet-well surface is very dirty with floating debris. It must be
cleaned.
./ Remove top of check valve for pump # 2. Repair or replace it.
./ Replace generator.
./ Repair building door hinge.
./ Replace pump lift out assemblies.
./ Replace pump # 2.
./. Carry out contract operations and maintenance.
./ Remove solid soapy material from surface of wet-well.
./ Pump # 1 was installed. In order to use pump # 1, the plug valve
on pump # 2 was closed to prevent re-circulating waste water. The
check valve must be repaired.
./ Install 4inch diameter stilling well for transducer away from inlet
pipe in wet-well.
./ Replace frames and covers in community leach field - See
Enclosure # 4 ~~ Some open manholes should .be covered
immediately.
./ . Unclog distribution pipe in the Bilco hatch covered distribution
chamber to balance the load to the leaching field.
./ Remove material from the manhole near the Officer's Service Road
(parallel to Whistler Avenue) and opposite the State Patrol Office
Building.
./ All of the above must be checked and tested.
S:\06187 Fishes IslondlO & MlRepor12006.doc
Fishers Island Sewer District
Report on the Wastewater System
Operation and Maintenance
During 2006
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F. Observations, Conclusions and Recommendations
Conclusions
During periods of non-rainfall and even during periods immediately following
rainstorms, the flow drops down. This indicates that the groundwater table is low.
or it is not leaking into the sewers.
During 2001, the first clogging of the sewer with rags occurred and was resolved.
The clogging of manholes with paper, debris and pebbles has continued. The
manholes in the Officers Service Road should be monitored and cleaned before
back up occurs. (The obvious one is the service road sanitary manhole that
services the State Police Building). The manhole was observed to be clogged
and backing up into the upstream sewer. If not taken care of, this can result in
basement flooding.
The community leaching system distribution is not acceptable. The west galleys
are overloaded due to a clogged outlet to the eastern galleys.
Based upon review of October 2006, the following can be concluded:
-/ Clogged manholes in Officer's Service Road must be cleaned,
inspected and rebuilt inverts if necessary.
-/ Upstream users must refrain from flushing materials like cloth
down the toilet.
-/ The flow distribution into the three tanks was balanced.
-/ The flow out of the distribution box to the leaching field was very
bad. The east pipe was entirely clogged.
-/ Both pump lift out fixtures are severely corroded in the pump
station wet-well.
-/ Fix storage shed hinge at the pump station.
-/ Pump out of septage from the three residential system near the
Silver Eel Cove system should be considered in the event that a
septic truck is used to clean manholes or pump out the community
system.
-/ The pump # 2 check valve is faulty.
-/ Six community leaching system frames and covers are either
broken or off-set from the manholes.
-/ The pump station upgrade and stormwater elimination must be
done before the community center can discharge to the system.
-/ Pump # 2 pumped 70 gpm which is far below specification and can
result in force-main clogging.
6
Rshers Island Sewer District
Report on the Wastewater System
Operation and Maintenance
During 2006
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ENCLOSURE # 3
DISCHARGE MONITORING REPORT - DEC
MAY 21,2007
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ENGINEERED
.
-, --
~
,'.'.,,7;::<:
LAND
STRUCTURES
SOLUTIONS
May 21, 2007
Mr. Scott A. Russell
Supervisor
Town of South old
Town Hall
53095 Main Road
Southold, New York 11971
RE: Discharge Monitoring Report
Fishers Island New York Wastewater Systems
NYS-SPDES DMRN.Y. 0.199214
DTC Project No. 07-117-100
Dear Mr. Russell:
In conformance with our contract, we are pleased to submit the Discharge Monitoring Report for the
Fishers Island Wastewater Disposal Systems. The sludge depths for the septic systems 001, 002 and 003
as shown in Table I, and the estimated wastewater flow rates for systems 001, 002, and 003 based on
flow monitoring are shown in Table 2.
We are sending copies to Justice Louisa Evans, as well as the listed State and County officials for their
records.
Sincerely,
DNERSIFIED TECHNOLOGY CONSULTANTS
~.t:"
Chairman and Chief Executive Officer
-7~..A4d~. y~
Michael A. Horne, M.S., P.E.
Associate
"Enclosures:
Table 1 and Table 2
cc with enclosures:
Justice Louisa Evans, Esquire
Mr. Dilip BaneIjee, Department of Conservation, Region 1
N. G. Kaul, Director, DEC
Mr. Isador Doroski, Suffolk County Department of Health Services
S:\07117 Fishern Island\Lelters\OS-22-07-Russell rptdoc
DIVERSIFIED TECHNOLOGY CONSULTANTS
556 WASHINGTON AVENUE NORTH HAVEN CT 06473 2032394200 2032347376 FAX
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FISHER'S ISLAND W ASTEWTER SYSTEM
FACILITY ill NUMBER - NEW YORK 0.199214
TABLE 1
SHOWING SEPTIC TANK CONDITIONS FOR
SYSTEMS 001, 002 AND 003
MAY 9, 2007
System Description
(001) Community Septic System
3 10,000 Gallon Concrete
Septic Tanks 12 Feet High,
10 Feet Liquid Level Depth,
20 Feet 6 Inches Long
Septal!e Conditions
West Tank Inlet Compartment Thin Scum Layer I 7" Deep Septage
Outlet Compartment Negligible Scum 2" Deep Septage
Middle Tank Inlet Compartment Thin Scum Layer 30" Deep Septage
Outlet Compartment Thin Scum Layer 2" Septage
East Tank Inlet Compartment Thin Scum Layer 36" Deep Septage
Outlet Compartment No Scum 16" Septage
(002) Cinema Septic System
I 1,500 Gallon Concrete
Septic Tank 7 Feet High
10 Feet 6 Inches Long, 5 Feet 4 Inches Liquid Depth
Septa!!e Conditions
Inlet Compartment
Outlet Compartment
No Flow in System
Thin Scum Layer
No Scum
I" % Deep Septage
I" % Deep Septage
(003) Three Cottages Septic System
I 2,000 Gallon Concrete
Septic Tank 7 Feet High,
II Feet Long, 5 Feet 4 Inches Liquid Depth
Inlet Compartment
Outlet Compartment
4" Scum/Debris
2" Scum/Debris
18" Deep Septage
12" Deep Septage
5:\07117 FisbInls1and\I.el:t=1:\Septic Tant: TlIbJe I.doe
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SEPTIC SYSTEM
001
002
003
001
002
003
TABLE 2
ESTIMATED WASTEWATER FLOWS
(SEWAGE ONLY)
SEASON
Summer
Winter
Summer
Winter
Summer
Winter
ESTIMATED TOTAL FLOWS
(INCLUDING EXTRANEOUS FLOWS)
Summer
Winter
Summer
Winter
Summer
Winter
5:\07117 F'lShm IsJand\J..etten\Est WuteWal.cr Flows Table 2.doe
FLOW (AVERAGE
GALLONS/DAY)
9,488 gpd
3,938 gpd
700 gpd
7 gpd
550 gpd
250 gpd
] 6,688 gpd
7,688 gpd
700 gpd
7gpd
550 gpd
250 gpd
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ENCLOSURE # 4
OPERATION AND MAINTENANCE
FIELD REPORT, AUGUST 28, 2007
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~"QI"EERED
'~
--+--
...---::-:--...
WATER
L""D
'TRUCTURES
SOLUlIOM.
FIELD REPORT
Page 1 of 3
DATE
August 30, 2007
WEATHER
August 28, 2007/8:00 a.m.
DATE/TIME ON SITE
Fishers Island Operation & Maintenance
LOCATION
Annual O/M Review/Report
PURPOSE
Michael A. Horne, P.E.
REPORT BY
Fishers Island Sewer District
07-117-200
PROJECT NAME I PROJECT NUMBER
Personnel Present:
Harold Cook, Harold's Construction Company
Sean Moniz, Harold's Construction Company
Michael Horne, PE
Water & Waste Equipment, Inc.
Suburban Septic
I.
1.
2.
3.
4.
5.
6.
Pump Station
We assembled at 8:00 a.m.
The pumper truck and crane equipment were mobilized at the pump station site.
The force-main and wet-well were emptied and the by-pass pump disassembled
and removed.
W&WE, Inc. removed and replaced the east check and plug valves with good
quality new valves.
The control panel was removed and replaced with a user friendly panel.
Pumps were checked. The west pump motor is not operable. It is explosion-proof.
It is not repairable without a high cost. It was lifted out of the wet well and onto
W&WE's truck.
7. The pump lying on the ground at the site is not repairable. It is rusted.
8. The only operable pump was repaired and seems to function well.
9. The pump station is operational. We tested it for about 30 minutes.
10. It was noted that grit, sand and pebbles have accumulated at the bottom of the wet
well. Thev must be removed or damage to the new pumps when they are
installed could occur.
DIVERSIFIED TECHNOLOGY CONSULTANTS
556 WASHINGTON AVENUE NORTH HAVEN CT 06473 203 2394200 2032347376 fAX
STAMFORO, CT ANDOVER, MA
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1.
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ElIlillllillOlIEO
WATER
I.AII"D
.TRUCtURES
IOLUlIO..I
FIELD REPORT
Page 2 of 3
Community Septic System
Area mowed and looked good. The inlet manholes are clean.
Flow splitter prior to 10,000 gallon septic tanks was checked. The V-notches were
cleaned.
Flow appeared equalized.
Flow splitter after leach field evaluated. Flow east is very sluggish. Pipe needs
cleanina.
TANK INLET COMPARTMENT OUTLET COMPARTMENT
West 1" scum 3" sludge
10" sludge
Center 31" sludae 4" sludae
East 23" sludge 9" sludae
Center tank needs pump out. East tank should be pumped when effective. i.e.,
when the Silver Eel Cove (Coast Guard House) tank is pumped, or the center tank is
pumped.
The depths of wastewater in the leaching field were measured as follows: Number 1 is
nearest to Whistler Avenue.
EAST 60 FEET LONG GALLEYS -INLETS
#1 Moist
#2 Moot
#3 Moist - No cover on manhole
EAST 100 FEET LONG GALLEYS -INLETS
#1 Moist, Cover broken
#2 Moist
#3 1-2" DeeD, End needs manhole lid
#4 Moist, Frame/Cover reset
DIVERSIFIED TECHNOLOGY CONSULTANTS
556 WASHJNGTON AVENUE NORTH HAVEN CT 06473 2032394200 2032347376 FAX
STAMFORD, CT ANDOVER, MA
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SOL.HOIt.
LAIID
EII8'''EEREO
ITRUCtURES
WATER
FIELD REPORT
Page 3 of 3
EAST 60 FEET LONG GALLEYS
#1 Moist
#2 19" DeeD, Manhole Cover Missino
#3 7" DeeD
EAST 100 FEET LONG GALLEYS -INLETS
#1 Moist
#2 21" DeeD
#3 36" DeeD
#4 22" DeeD
Five manhole top covers - repairs needed.
Conclusion: Flow is unbalanced because pipe to eastern galleys is limited. Pipe
needs to be uncloaaed.
III. Cinema System
1. Inlet 4" sludge.
2. Outlet 1" sludge.
No problem.
IV. Coast Guard Cottages (Silver Eel Cove)
1. In 2" sludge.
2. 21" sludge.
Conclusion: Needs pump out
V. Manhole in the Service Road north of Whistler Avenue and the State Police Facility
must be cleaned.
5:\2007\07117 Fish.", IslandIField Reports\08-3D-<l7.doc
DIVERSIFIED TECHNOLOGY CONSUL TANTS
556 WASHINGTON AVENUE NORTH HAVEN CT 06473 2032394200 203234 7376 FAX
STAMFORD, CT ANDOVER, MA
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ENCLOSURE # 5
OPERATION AND MAINTENANCE
ABBREVIATED REPORT, AUGUST 28,2007
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8/28/07
ENGINi:E~ED
WATER
LAND
'TRUCTURE.
.OLUTION.
FIELD REPORT
Page 1 of 2
8:00 a.m.
WEATHER
DATE
TIME ON SITE
Fishers Island Operation & Maintenance
LOCATION
Annual O/M Review/Report
PURPOSE
Michael A. Horne, P.E.
REPORT BY
07-117-200
Fishers Island Sewer District
PROJECT NAME I PROJECT NUMBER
Personnel Present:
Harold Cook, Harold's Construction Company
Sean Moniz, Harold's Construction Company
Michael Horne, PE
Water & Waste Equipment, Inc.
Suburban Septic
I.
1.
2.
3.
4.
5.
6.
Pump Station
We assembled at 8:00 a.m.
The pumper truck and crane equipment were mobilized at the pump station site.
The force-main and wet-well were emptied and the by-pass pump disassembled
and removed.
W&WE, Inc. removed and replaced the east check and plug valves with good
quality new valves.
The control panel was removed and replaced with a user friendly panel.
Pumps were checked. The west pump motor is not operable. It is explosion-proof.
It is not repairable without a high cost. It was lifted out of the wet well and onto
W&WE's truck.
7. The pump lying on the ground at the site is not repairable. It is rusted.
8. The only operable pump was repaired and seems to function well.
9. The pump station is operational. We tested it for about 30 minutes.
10. It was noted that grit, sand and pebbles have accumulated at the bottom of the wet
well. Thev must be removed or damage to the new pumps when they are
installed could occur.
DIVERSIFIED TECHNOLOGY CONSULTANTS
556 WASHINGTON AVENUE NORTH HAVEN CT 06"173 2032394200 203234 7376 FAX
STAMFORD, CT ANDOVER, MA
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ENGINEERED
WATER
LAND
.'RUCTUIIES
SOLUTION'
FIELD REPORT
Page 2 of 2
II. Community Septic System
All depths of wastewater in all of the units were recorded. They will be in the final report.
Conclusions:
The center 10,000 gallon septic tank must be pumped. It has 31 inches of sludge in
the first compartment. Sludge accumulation is more rapid than past years.
The east tank has accumulated 23 inches of sludge. It could be pumped if cost-
effective i.e., truck capacity.
The flow to the leaching field is unbalanced i.e., the pipe leading to the eastern set of
galleys is clogged.
Four rows of fourteen total have 19 inches to 36 inches of wastewater in them. (Due
to unbalance of system).
Cover repairs are needed in five places. Some are missing completely.
The splitter boxes need to be cleaned.
Cinema System
No problems.
Coast Guard System
Needs pump out.
Manhole is Service Road parallel to Whistler Avenue services the State Police Facility
and upstream facilities must be cleaned.
1.
2.
3.
4.
5.
6.
III.
1.
IV.
1.
V.
Formal report with detailed information will follow.
cc: The Honorable Louisa Evans (via email)
Harold's Construction Co. (via email)
S:\2007\07117 Fishers IslandlField Reports\08-28-07.doc
DIVERSIFIED TECHNOLOGY CONSUL TANTS
556 WASHINGTON AVENUE NORTH HAVEN CT 06473 203 239 4200 203 234 7376 FAX
STAMFORD, CT ANOOVER, MA