COMPLIANCE INFO_2009-2014 - Laserfiche WebLink

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DISTRIBUTION SYSTEM INVESTIGATION CORRECTIVE ACTIONS : Make required corrections to the system to eliminate the entrance of bacteria into the system . Flush system and all dead end lines with clean well water. Disinfect the system with NSF 61 approved chlorine at 100 ppm for a contact period of at least 3, but not more than 24 hours at 10 ppm , perAWWA standards. Ensure every hose bib, faucet, toilet, shower, and any dead end line is flushed with a 100 ppm residual , by testing each site using a field test kit or for a chlorine odor where testing is not practical. Test for a 100 ppm chlorine residual, after two hours through out the system. If the residual tests below 100 ppm , increase the concentration to back 100 ppm. A successful disinfection requires a residual of 100 ppm to be present after the 3 hours, or at least 10 ppm after 24 hour contact period . If the residual is found to be non-detectable (ND) at a location , with 50-10 ppm at other locations, or with ND residuals through out the system , then the disinfection process may not have been successful. This may be an indication of where bacteria are entering into the system . Repeat the investigation , flushing , and disinfection processes. After the disinfection process, flush the system until it tests non-detect for chlorine residuals. Resample by directing your laboratory to collect " Other" samples and test for chlorine residuals and TC bacteria, using enumeration test methods from locations that were effected. NOTE : The month following a TCR MCL, you are to direct your laboratory to collect 5 ROUTINE samples and have them test for chlorine residuals and TC bacteria , using enumeration test method . If the DISTRIBUTION SYSTEM Continues to Fails, contact the EHD for guidance at (209) 468-3420. SUMMARY: Provide a report of the investigation that includes the cause of the TCR MCL, the physical repairs that were made to the system to eliminate the entrance of bacteria into the system , and the disinfection process that eliminated the presence of bacteria, and returned the system to compliance with the TCR: INVESTIGATION FINDINGS: 'r ffff.: I' REPAIRS MADE, OR TO BE MADE, TO EXLUDE THE ENTRANCE OF BACTERIA AND DATE OF THE CORRECTION : ;. i DISINFECTION PROCESS : @i@ C'. ti Submit this completed form to the EHD , by fax at (209) 468-0341 , or Mail to SJC-EHD, SPWS Program , 1816 Hazelton Ave, Stockton Ca, 95205, within 30 days of the system failing a the TCR, along with additional TC results that indicate the system is now incompliance with the TCR. Failure to submit form will result in a Procedural Violation fee of $250. i