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CITY OF STOCKTON <br /> A94 <br /> 3. �. <br /> DEPARTMENT OF MUNICIPAL UTILITIES <br /> 2500 NAVY ORIVE <br /> STOCKTON, OA 9520E-1 9 91 <br /> (2097 937-8750 <br /> FAX(2091 937-B70S <br /> September 27, 1996 <br /> Doug Wilson, Supervisor <br /> San Joaquin County <br /> Public Health Services <br /> Environmental Health Division <br /> P. O. ?lox 3R8 <br /> Stockton CA 95202 <br /> SODIUM CHLORITE RELEASES: 8590 WEST LANE AT MOSHER SLOUGH AND 8603 <br /> Ti ORNTON ROAD AT 12AVIS VIS ROAD <br /> As you are aware, the City of Stockton Municipal Utilities Department (MUD) experienced two <br /> unauthorized releases of sodium chlorite at the above referenced locations. The chemical release at <br /> 8590 West Lane and Mosher Slough occurred during the August 10, 1996 massive power outage, and <br /> is attributed to vandalism. The other release, 8603 Thornton Road, occurred September 9, 1996 and <br /> is suspected to be a result of a loose fitting from the aboveground storage tank to the inlet piping <br /> leading into the sanitary sewer. <br /> 8,590 West Lane and Mosher Slough <br /> MUD has a service contract with Vulcan Chemical Technologies, Inc. (Vulcan) to supply chemicals <br /> on an as-needed basis. The Vulcan driver delivered sodium chlorite to the facility on Friday, August <br /> 9, 1996 at approximately 7:00 p.m. The tank was tilled to approximately 1500 gallons by visual <br /> inspection and the pump was set to inject approximately 105 gallons within a 24 hour period. No leaks <br /> were detected during this delivery. (See attached correspondence from Vulcan dated August 20, 1996.) <br /> The power outage began Saturday, August 10, 1996 at approximately 3:40 p.m. and escalated to a <br /> major blackout sometime before 5:00 p.m. Power was fully restored that same night at approximateiy <br /> 9:30 p.m. The release was discovered on Monday, August 12, 1996 at approximately 10:00 a.m. If <br /> we assume that the vandalism occurred during the power outage, the estimation of chemical released <br /> could have been approximately 160 gallons within the 36 hour period. <br /> The San Joaquin County Public Health Services, Environmental Health Division (PHS-EHD) was <br /> notified Monday, August 12, 1996 at 12:54 p.m. and the initial estimation of chemical released was <br /> estimated at 40 gallons. During subsequent excavation of the soil around the aboveground storage <br /> tank, it became apparent that more material had been released than previously calculated. <br /> Mr. Michael Kith, Senior R.E.H.S., was notified August 15, 1996 of the reestimation of the amount <br /> of chemical released, and a long-term plan of action was discussed regarding the removal of the soil <br /> "STOCKTON...CALIFORNIA'S SUNRISE SEAPORT" <br />