Gas Station Equipment Life Cycle (Piping)

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CherokeeUST
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Gas Station Equipment Life Cycle (Piping)

Post by CherokeeUST » Thu Sep 12, 2019 7:58 am

I created a program about 15 years ago to estimate the "Risk" from a gas station. The state of NM still uses it and calls it GoNM.

I started looking at it the other day and was thinking it needed to be updated with the new EPA UST regulation and wanted to get your input on the scoring criteria I came up with for the equipment.

This is what I came up with for the piping. I tried to stay generic, we all know there are manufacturers that made some horrible products in the past. I tried to account for that by using the age of the piping as a seperate criteria.

The scale I used is 1 (Best) to 5 (worst).

Piping
  • Flex Pipe (DW) =1
    Fiberglass Pipe DW=1
    Flex Pipe SW=3
    Fiberglass Pipe SW=3
    Steel Pipe w/ CP=4
    Other/Unknown=5
Depending on responses to this I may post this again for the other criteria I came up with.
The opinions expressed here are entirely mine and are not endorsed by my employer.

Robert
www.linkedin.com/in/robertlargent

Grantillo
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Re: Gas Station Equipment Life Cycle (Piping)

Post by Grantillo » Tue Sep 17, 2019 7:06 am

What other criteria did you come up with, CherokeeUST? I'm interested.

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CherokeeUST
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Re: Gas Station Equipment Life Cycle (Piping)

Post by CherokeeUST » Thu Sep 19, 2019 8:02 am

Piping-age
Tanks- Material of construction, Design of tank (SW, DW, ETC.), Age of tanks, how many tanks
Cathodic Protection on system
Overfill- Type
Pumping system (Suction vs pressurized)
The capacity of tank(s)- bigger = more risk
Spill bucket design- SW vs DW
Release detection in use for piping-
Release detection in use for tanks
Number of dispensers- more dispensers=more piping and piping connections
Years since last inspection-
Does site have prior NOV's? Could be indicative of a site that is not being managed or monitored effectively.
Does STP have watertight containment?
Do dispensers have watertight containment under them?
Product stored-This might make the farm industry mad, but I had E85 scored highest, diesel lowest.
Tank status- TOC, permanently closed, open

When we built the original program we used ESRI software and included geographic and demographic criteria like distance to water sources (Surface water, wells), distance to residential buildings, distance to sensitive receptors (Schools, nursing homes, etc.)

Below are some examples of scoring for systems.
  • Tanks Score
    TW Clad/coated/jacketed Steel 1
    TW Fiberglass 1
    DW Clad Steel 2
    DW Fiberglass 2
    DW Steel W/ CP 3
    SW Clad Steel 4
    SW Fiberglass 4
    SW Steel w/Internal lining and/or CP 5
    SW Steel 5
    Other/Unknown 5
  • Cathodic Protection Score
    None required 1
    Galvanic 3
    Impressed Current 5
  • Overfill Protection Score
    Any combination of below 1
    Flapper Valve 2
    Alarm 3
    Ball Float 4
    Unknown 5
  • Tank Capacity Score
    0-1100 Gallons 0
    1,100-6,000 Gallons 1
    6.001 - 10,000 Gallons 2
    10,001-15,000 3
    15,001-20,000 4
    Greater than 20,001 gallons 5
The opinions expressed here are entirely mine and are not endorsed by my employer.

Robert
www.linkedin.com/in/robertlargent

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Re: Gas Station Equipment Life Cycle (Piping)

Post by tankgenie » Thu Sep 19, 2019 4:09 pm

Interesting.
"Resident Googler"

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CherokeeUST
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Re: Gas Station Equipment Life Cycle (Piping)

Post by CherokeeUST » Fri Sep 20, 2019 10:38 am

There's an article from 2015 by ASTWMO that kind of covers the same topic. In Appendix D there is some commentary from the Insurance Industry.

http://plia.wa.gov/wp-content/uploads/2 ... -Final.pdf
The opinions expressed here are entirely mine and are not endorsed by my employer.

Robert
www.linkedin.com/in/robertlargent

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