So, back here I mentioned how I finally got the Operations guys to stop complaining long enough to take the sample which let me figure out that our supplier was billing us for 25% caustic, but maybe only sending 16%. Purchasing finally has their response to the supplier nonconformance I filled out, and their solution to how they can ensure they no longer send us out-of-spec caustic is… we should adjust our purchase specification.
Um. No.
As it turns out, they never actually test what they are sending us to make sure it is what they say it is. They get a barge of 50% caustic with an analysis on that, which is unloaded into a tank. Then, the truck driver half-fills his truck from that tank, then puts in the same amount of water, then drives it over to us where we receive an analysis they’ve calculated from the tank analysis.
Good Og. :smack: Well, at least we have a caustic meter to track our usage… and I can get Engineering to pull specific gravity into the control system to monitor in case they’re selling us water again. Except it turns out, the meter’s specific gravity reading is way off. And hasn’t been PM’ed since ~2001.
But that’s okay – we monitor pH on what we add the caustic to! Well… turns out that the lab switched over to cheaper pH electrodes last year. They’ve been giving funky results a lot lately, so I keep making them change the electrodes. Last Friday, someone read the instructions for the “new” electrodes – which specifically state do not store in DI water. Which is what they’d been doing since switching to the new electrodes… last year.
Well, NOW they’re being stored in pH4 buffer as instructed, so what’s the problem, amirite?
sigh
