COMPLIANCE INFO_1999-2005 - Laserfiche WebLink

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Corporate Office 3500 American River Drive A P.O. Box 15002 Sacramento, CA 95851-1002 (916)484-3011 •FAX(916)484-6506 A. TEICHERT & SON, INC. AM Established 1887 January 10, 2000 `"" E JAN 10 2000 ENViRONPOEN-Tk LTH Doug Wilson PERIV11T,/SERVICFS Public Health Services San Joaquin County 304 East Weber Avenue Stockton, CA 95202 Dear Doug: Per your request on December 16, 1999 we have developed some different solutions to our problem with the 3" line leak detectors. This letter briefly summarizes what we learned and the solutions that we are proposing. Currently, we have two 5hp Big-Flo pumps with two Vaporless 3" LD-3000 line leak detectors hooked in parallel feeding a 4" bottom loader to load fuel trucks. Since the API coupler is installed on the fuel truck prior to starting the pumps, the line leak detectors see the fuel truck as a big leak and go into leak mode. When we shut down the lines manually to get the leak detectors started , we have problems opening them equally and gradually without going into leak mode. On occasion when we are successful opening the valves and get both pumps flowing, we experience a 37% flow rate reduction compared to our other sites without the Vaporless leak detectors. We also simulated a 40 and 80 gallon per minute product line failure while loading a fuel truck and found that the line leak detectors did not detect this event. Consequently, I really question their true usefulness. To try and solve these problems, we started over at the beginning as if we were going to design a new system. We talked with different contractors, fuel station design engineers and line leak detector manufacturers. Apparently all the line leak detectors operate on the same principle and similar operating pressures, so there would be no benefit to changing out the line leak detectors that I have for another brand. We discussed making a custom unit, but I was told the state would have to approve it. Based on our research I have two proposals for you to select from. I have prepared drawing 10657 for your convenience to show the current setup and the two proposals. Proposal 1 Remove both existing line leak detectors and install a second piping sump probe. In case the first piping sump probe failed we would have a back up. This would eliminate the startup problems, the flow restriction problem and provide redundant leak detection Printed on recycled paper.