AWWA M42 Tank Inspection Intervals, and the Eight States With Stricter Rules
AWWA M42 recommends tank inspection every 3 years. But 8 states require more. Learn the rules, including Texas' annual mandate.
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AWWA M42 recommends tank inspection every 3 years. But 8 states require more. Learn the rules, including Texas' annual mandate.
The 60-month baseline underwater bridge inspection interval, the 72-month exception, and who can lead the inspection under 23 CFR 650.311.
Phoenix's canals and reservoirs support a hidden industry: six types of commercial diving companies.
A Gulf of Mexico diving superintendent explains the seasonal rhythm of offshore repair work—pre-season prep, storm chaos, and the post-hurricane rush.
Dive supervisor Ray explains how sonar, ROVs, and zero-visibility divers assess a dam in place, saving months and millions.
Learn what a commercial dive tender does, why the watch is a full-time job, and how to perform it safely.
Modern underwater demolition uses no explosives. Learn the survey, cutting, and lifting techniques that get the job done.
A marine contractor explains teredo worm damage and how to build marine structures that survive them.
A marine contractor explains what makes a harbor aggressively corrosive and how to keep your piling from dissolving.
Most marine contractors have fewer than five employees. Five checks to separate the real crews from the kitchen-table bids.
A salvage master explains the legal obligations that kick in the moment your boat goes under, and how to avoid costly mistakes.
How commercial divers keep plant intakes clean and condensers online during August peak demand.