HomeMy WebLinkAbout08/24/2022 - Langan Memo - - 1450 Osgood Street A /VfiA /V Me.. orandum
100 Cambridge Street,Suite 1310 Boston,MA 02114 T:617.824.9100 F:617.824.9101
To: Jean Enright, Town of North Andover
From: Frank Holmes
Info: Ellen Keller, Ozzy Properties
Mac Utsey, Hillwood
Adam Kedich, Hillwood
Date: August 24, 2022
Re: Lot A Pump Station operation and Maintenance Plan
1550-1650 Osgood Street
North Andover, MA
Langan Project No.: 140182705
This memorandum is to follow up on comments received from you regarding the Emergency
Readiness Plan we previously submitted for the pump station on Lot A at 1600 Osgood Street in
North Andover. The Emergency Readiness Plan is required by condition #76 of the Site Plan
Review Notice of Decision for Lot A. Following our submission of a draft ERP to you on May
18th, we received comments requesting additional information about operation and maintenance
of the pump station and associated generator.
Regarding the generator, it is tested automatically once each week, and Ozzy Properties has an
agreement with PowerUp for semi-annual preventative maintenance servicing. Additionally, on-
site facilities maintenance personnel monitor generator run times and the building's Builidng
Maintenance System monitors battery strength. Ozzy Properties also implements rodent control
at the generator.
Regarding the pump station, Ozzy Properties will be engaging Williamson Pump to perform semi-
annual preventative maintenance on the pump station. That work will include visual inspection
of the pump chamber, control panel and level transducer l float switch, recording or incoming
voltage and amperage when running the pump motor, confirmation of that circuit breakers and
alarms are functioning properly, inspection of pump grinder rings and cutter impeller, visual
inspection of discharge assembly for leaks, and photo documentation.
Additionally, we have edited the Emergency Readiness Plan to specify that septage haulers need
to be permitted by the town's Health Department.
Please let me know if you have any additional questions or comments.
111angan.comldata\NHVldataAl40182701Troject Data\ Discip[ine\Site C ivi NR eports\S ewer Pump O&M Planlmem_Jean Enright—Lot
A Pump Station O&M-2022-08-24.docx
Emergency Readiness Plan
For Sewer Pump Station
Ozzy Properties
1550-1550 Osgood Street North Andover MA
Primary..Contact Information
Name: TBD
Cell Phone:
Email:
Secondary Contact Information
Name: TBD
Cell Phone:
Email:
Pertinent Information
1. The pump station is designed to avoid interruptions in service with the following
provisions:
Redundant (duplex) pumps— pumps alternate with each pump cycle. In the
event of a pump failure, an alarm is.triggered and building operation personnel
are notified so that the.failed pump can be serviced, repaired or replaced. Until
the.failed pump is serviced, repaired or.replaced, the second pump will keep
the facility in service...
Emergency generator-- in the event.of a power failure, the pump station will
remain operational, powered by the emergency generator.
2. Procedures. if pump station is inoperable:
■ In the event the pump station is inoperable (both pumps fail, a power
interruption..and emergency generator failure, a failure in the sewer force main
on site, or any.other issue preventing operation of the pump station), a high
water alarm is triggered and building operation personnel are notified through
the Building Management System. In the event that the duration of the pump
station being inoperable results in the storage volume of the pump station wet
well being exceeded, a 15,000 gallon overflow tank has been provided to allow
for the temporary storage of sanitary sewage. The 15,000 gallons of storage
represent approximately 24 hours of an average day's sanitary sewage
discharge from the existing facility serviced by the pump station.
• In a case where the high water alarm is triggered and the pump station is
determined to be inoperable, building maintenance personnel shall monitor the
level of sewage in the overflow tank. If the sewage level in the tank reaches
1/3 of the depth of the tank, the building maintenance personnel shall call a
septage hauler permitted by the town of North Andover Board of Health to
come to the property pump, out the tank and transport the sewage to a
disposal facility. The building maintenance personnel shall continue to monitor
the sewage level in the tank until such time as the pump station is operational,
calling a septage hauler each time that the sewage level in the tank reaches 1/3
of the depth of the tank.
• In the event that the overflow tank is utilized, and on the resumption of pump
station operation and after the overflow tank is pumped down, the interior of
the tank shall be cleaned by suitable means to remove residual waste.
8/29/2211:39 PM Town of North Andover Mail-1600 Osgood-Emergency Readiness Plan
T H, N ER
7 A
Jean Enright<jenright@northandoverma.gov>
Massadus���
77,
16 Osgood w Emergency Readiness Plan
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Tim,Willett<twillett@northandoverma.gov> Mon, Aug 29, 2022 at 1:135 PM
To.- Jean Enright<j'enright@northandoverma.gov>
I'm ok with this plan.
[Quoted text hidden]
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