Operation_and_Maintenance_of_Compressed_Natural_Gas_(CNG)_Fueling_Station_RFP.pdf

Scope of Services Operation and Maintenance of Compressed Natural Gas (CNG) Fueling Station

1. Scope of Work

Contractor shall provide all labor, materials, supervision, tools, equipment, and vehicles necessary to complete all preventative maintenance services necessary for the Facility to operate to the manufacturer’s original specifications and performance standards. A weekly inspection for the facility shall be performed by the Contractor and submitted with the Contractor’s monthly invoice.

It is estimated that the station will compress approximately 125,000 DGEs per month.

2. Minimum Qualifications

The Contractor’s service technicians shall have a minimum of three (3) years direct experience in the maintenance of CNG fueling facilities, including CNG compressors, natural-gas dryers, CNG dispensers, and PLC-based equipment controllers.

3. Contractor Responsibilities

At a minimum, the Contractor shall provide and meet the following responsibilities:

A. The Contractor’s technicians shall be equipped with a laptop PC with modem or Wi-Fi connectivity for the purpose of calling into the compressor control panel remotely.

B. The Contractor’s service technician must respond within two hours of a call for service

24/7 (24 hours per day, seven days per week).

C. The Contractor’s technician shall physically visit and inspect the facility weekly for the purpose of checking on the status of the station equipment and making necessary or appropriate adjustments to the equipment.

D. Contractor shall test and verify system functionality upon completion of any repair or maintenance work prior to leaving the site.

E. The work to be performed during each visit will include the services recommended by the manufacturer. The technician shall also check the following during each service visit:

Compressors (ANGI)

a) Start all compressors if possible and check all pressure and start/stop settings and adjust as appropriate.

b) Inspect skid and enclosure for damage and water leaks

c) Check Fault Logs and active faults

d) Verify Cooler is free of dirt/debris

e) Compare transducer readings to gauge

f) Check oil pressure shut down setting

g) Check operating pressure and temperatures

h) Check primary and secondary packing vents for venting

i) Visually inspect PRV's and vent stacks for venting

j) Check vent stack to ensure free of moisture (remove drain plug)

k) Check for unusual noises or vibrations

l) Record all operating conditions

m) Drain inlet filter

n) Drain Receiver tank

o) Drain Accumulator

p) Check Day Tank Sight Glass and add oil as needed

q) Check Oil levels

r) Visually inspect and snoop all piping, tubing and hoses for leaks, abrasion or vibration

Dryer (Xebec)

a) Check for alarms and notifications

b) Verify that the dew point reading is within tolerance

c) Check filter differential pressure while running

d) Check for gas leaks

e) Check for Damage

f) Check filters for Condensate

g) Visually Inspect PRV's and Vent Stacks

h) Take dryer logs (dew Point, pressure reading)

i) Visually inspect and snoop all piping.

Priority Panel and Gas Storage Inspection

a) Check fault logs and active faults

b) Visually inspect PRVs and vent stack

c) Visually inspect and snoop all piping, tubing and hoses for leaks, abrasion or vibration

d) Inspect storage vessel(s) for signs of damage/rust

Fast Fill Inspection

a) Visually inspect and snoop all piping, tubing and hoses for leaks, abrasion.

b) Inspect hoses, nozzles, valves, and breakaways for leaks or damage

c) Observe operation of fill posts

Site Inspection

a) Test ESD system

b) Complete maintenance documentation

c) Review findings with designated onsite personnel.

Preventative Maintenance Performed at Manufacturer-Recommended Intervals

(covered in the monthly rate) Includes:

Compressor (ANGI)

a) Perform oil change and replace oil filters (oil and filters included)

b) Drain condensate Pot

c) Pressure wash compressors

Dryer (Xebec)

a) Manually initiate dryer regeneration in advance of desiccant reaching saturation (as required based on auto-dew sensor). Notify Sanitation prior to all dryer regenerations.

b) Verify operation of all actuated valves on dryer by manually energizing actuators

(every 6 months).

All other Scheduled Maintenance such as the 4,000hr PM or 8,000hr PM will be billed outside of preventative maintenance pricing, and will be billed at the Time and Material agreed rate. The

Technician shall check in and check out with the designated Sanitation Departments contact person at the facility for each site visit.

The Contractor will monitor and advise the City of recommended service intervals as they approach, however, this work is not included in the Routine Maintenance Services.

The work shall not be performed without prior approval by City representative. The City will not be obligated to pay for such work if not approved in advance.

The Contractor shall test and verify system functionality upon completion of any repair work prior to leaving the site and shall log the test result.

The Contractor shall prepare a one-year look-ahead planned maintenance schedule with estimated cost to assist the City in preparation of their operating budgets (the City operations on a Fiscal Year calendar of October – September) for the maintenance of the facility.

The Contractor will perform periodic service, maintenance, and certifications according to the recommended service schedule and guidelines provided by the manufacturers of the major components.