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Cleaning prototype PCB assemblies and waste water

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#50742

Cleaning prototype PCB assemblies and waste water | 19 June, 2007

We will be hand soldering a small number of PCBs per week (both through hole and SMT) using a water soluble flux. We will be using both standard leaded and lead free solder. The completed assemblies be hand washed in a sink using hot water. Do we need to use any water treatment prior to draining in the city sewer? (we are located in California). If so, can anyone recommend what equipment or process should be used. Any help would be appreciated.

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#50744

Cleaning prototype PCB assemblies and waste water | 19 June, 2007

Hi Bill,

You should contact your local water work dept. and work with them. Every county is different. Sometimes it not what you put in the drain, but how much. They may want to monitor your drain, which is standard stuff. Be prepared to show them everything you do and have your MSDS sheets handy.

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#50757

Cleaning prototype PCB assemblies and waste water | 20 June, 2007

i difagree

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#50760

Cleaning prototype PCB assemblies and waste water | 20 June, 2007

Thanks for playing. Tell him what he's won Johnny.

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#50762

Cleaning prototype PCB assemblies and waste water | 20 June, 2007

In addition to your local water departmet I would suggest that you also contact the EPA.

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#50763

Cleaning prototype PCB assemblies and waste water | 20 June, 2007

That's like asking the IRS to do your taxes for ya. Once they're in your building, they will not leave until they go thru top to bottom. Remember, EPA Field Investigators are "supposed" to find things wrong. They may not find any thing wrong with your process, but they'll find something else - like your sewer pipe! Just replace all 400 foot of it (even thought it runs down the center of your mfg. floor). Ah, the memories.

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#50764

Cleaning prototype PCB assemblies and waste water | 20 June, 2007

They're not that stringent in California, are they?

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#50766

Cleaning prototype PCB assemblies and waste water | 20 June, 2007

Prolly the worst. I'm sure it depends on who you get, but Cali not only looks for things that affect the waste stream, but will report on things not up to code, and the biggest being they look for earthquakes violations.

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Art Gillman

#50799

Cleaning prototype PCB assemblies and waste water | 22 June, 2007

I realize I am jumping in late but here is some REAL information. Waste water is controlled by EACH POTW (waste facility). It is NOT centralized as in EPA. The POTW's are primarily concerned with what might damage their pipes. First among their concerns is pH. The closer to neutral you can make the effluent the better. Next is heavy metals. ONE lab test with a combined waste sample should prove that heavy metals are NOT a problem. Best of Luck to you.

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#50806

Cleaning prototype PCB assemblies and waste water | 22 June, 2007

Jeez, liten up Art. That's what I said from the start.

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