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Jeff Won EH <br /> From: John Lane Ulane@groundzeroanalysis.com) <br /> Sent: Wednesday, April 06, 2005 3:25 PM <br /> To: Jim Barton <br /> Cc: Jeff Wong [EH) <br /> Subject: Re: Speedy Foods Treatment System Status <br /> AQUA MAG Fact <br /> Sheet.pdf <br /> Hi Jim: We do have dual sediment filters prior to the treatment ' <br /> components. Initially, we had 20 micron filters, which inhibited flow, <br /> but we got good steady flow after putting in 50 micron filters. <br /> Calcification is evident on the cam-lock fittings so we do know we have <br /> an issue with the hard water. Attached -is a one-page summary of the <br /> Aqua-Mag, which is a blended phosphate (pH 5.2) . I also spoke with Kim <br /> Walsh of Carbon Resources regarding potential biofouling and a probable <br /> solution (caustic soak of the units) should this prove to be an issue <br /> also. I will keep you informed. <br /> Thank you, John L. <br /> > John, <br /> > I Have a site in Manteca using these units where fine black sand is <br /> clogging one of them, so you might consider a sand filter if that's a <br /> problem. <br /> > Also, please provide information on the proposed additive (an MSDS <br /> sheet would be helpful) . I need to determine whether this modification <br /> will alter the waste discharge requirements for the general permit. <br /> > Thanks for the notice. <br /> > Jim <br /> > Please note the email change: jbarton@waterboards.ca.gov. <br /> > James L.L. Barton, P.G. <br /> > Engineering Geologist <br /> > California Regional Water Quality Control Board k <br /> > Central Valley Region <br /> > 11020 Sun Center Drive, Suite 200 <br /> > Rancho Cordova, CA 95670 <br /> > office (916) 464-4615 <br /> > fax (916) 464-4797 <br /> > >>> "John Lane" <jlane@groundzeroanalysis.com> 04/06/05 09:29AM >>> <br /> > Jim and Jeff: <br /> > i <br /> > The groundwater treatment system has been temporarily shut down for <br /> > maintenance. It appears as though scaling precipitation has greatly <br /> > increased backpressure and restricted flow through the carbon units. F <br /> > We previously performed an acid wash through the units which seemed <br /> to <br /> > restore flow for about a week before scaling again decrease flow <br /> > through the carbon units. We have been in contact with Slaby <br /> > Sales/Neep Systems to develop a program to reduce hardness by <br /> metering <br /> > an additive into the flow stream. I have scheduled for Monday <br /> > inspection of the units (opening the upper manway and inspecting <br /> f <br />