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Page I of 1 <br />Michelle Henry [EH] <br />From: Raymond von Flue [EH] <br />Sent: Tuesday, April 19, 2011 2:46 PM <br />To: Michelle Henry [EH] <br />Subject: FW: Septic Tank pH values for PSI in Tracy <br />From: Rodney Estrada [EH] <br />Sent: Tuesday, April 19, 20119:32 AM <br />To: Raymond von Flue [EH] <br />Cc: Kasey Foley [EH]; Willy Ng [EH] <br />Subject: FW: Septic Tank pH values for PSI in Tracy <br />From: Timothy O'Brien [mailto:tobrien@waterboards.ca.gov] <br />Sent: Friday, April 01, 2011 11:06 AM <br />To: Rodney Estrada [EH] <br />Subject: Septic Tank pH values for PSI in Tracy <br />Rodney, <br />Some documents I have here indicate septic tank effluent should be in the pH range of 6.5 to 7.2. That is a <br />pretty narrow range. I thought I'd allow 6.5 to 7.5 unless you have some objection to that range. Please let me <br />know. <br />TRo <br />6/15/2011 <br />