From: "Debbie M. Decker" <dmdecker**At_Symbol_Here**UCDAVIS.EDU>
Subject: Re: [DCHAS-L] Overspray from screen print cleaning
Date: January 30, 2012 3:26:46 PM EST
Reply-To: DCHAS-L <DCHAS-L**At_Symbol_Here**MED.CORNELL.EDU>
Message-ID: <1327789644.94822.YahooMailNeo**At_Symbol_Here**>

Thank you, Ron, for your concern.  UC Davis has its own waste water treatment plant and the person in charge of the shop has already had that conversation with the (EPA certified) lab at the WWTP.



Debbie Decker

EH&S UCDavis

(530)754-7964/(530)681-1799 (Cell)

FAX (530)752-4527


Co-Conspirator to Make the World A

Better Place -- Visit and join the conspiracy


Birkett's hypothesis: "Any chemical reaction

that proceeds smoothly under normal conditions,

can proceed violently in the presence of an idiot."





From: DCHAS-L Discussion List [mailto:dchas-l**At_Symbol_Here**MED.CORNELL.EDU]On Behalf Of Ronald Andrus
Sent: Saturday, January 28, 2012 2:27 PM
Subject: Re: [DCHAS-L] Overspray from screen print cleaning


I have concern with the following statement that you made "The cleaning process occurs in the shop in a large, stainless steel sink, installed against one wall in the shop.  The sink is fitted with a solids trap.  All of the emulsions, inks and strippers are water-based, don't have any hazardous materials in them and are allowed to go down the drain."  I am the Chemical Hygiene Officer for a paint manufacturing company.  Our company desired to discharge some non-hazardous waterborne waste into the sewage system.  Our company was advised by the city that to dump the water directly into the sewer system our company must have the representative material analyzed by an outside firm.  The analysis would be submitted to the sewage treatment agency for approval.  If approved for discharge to the sewer system, our company would receive a permit to do so.  Then periodically our company would have to do random testing to confirm that the same quality of discharge water was the same.  A retail consumer is permitted to directly discharge to the sewer system.  As a business any waste that is generated by any of your business processes is considered industrial waste.  Violation can lead to fines which especially in California can add up quick.


Very Respectfully,

Ron Andrus

Chemical HygieneOffcier

Matrix System Automotive Finishes,LLC



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