Retail Map - Biodiesel.org

Select location (AZ) then "Show state".

The only thing I'd add to Diseasel300's method would be to use a drill press instead of a hand drill. It gives you better control and is easier on your arms.

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“Whatever story you're telling, it will be more interesting if, at the end you add, "and then everything burst into flames.”
― Brian P. Cleary, You Oughta Know By Now