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V✓ater Treatment Plant ProducYion Siudy <br />FlGUIIE42: SO&TTHY OUAq`EPLY PESULiS <br />iN.WCEO CO~ULATpM 1E5i4 WIIX FEpPoC 9ULFI <br />f.111WA WfP.GIAHFNWM.TIL <br />t <br />k <br />s <br />a <br />a <br />ioarnu~ <br />~e } <br />ma vn ~rwMa se..~v xn ao ws <br />. <br />FIGUflE 11 STEV t iOC REYOI~AL OpSAGE <br />...e.~w .~..n~ a <br />The raw water SWA number was below 2 Umg-m in every quarter, which indicates <br />that raw water TOC is mosUy non-humic (not amenable to coagulafion) in nature. <br />These results are consistent with the jar test results, which show that the raw water <br />TOC is not amenable to coagulation. The GMIWA WTP met the specified TOC <br />removal in every quarter by meeting the raw water SWA excepfion criteria. <br />The TTHM and HAAS concen4ations in the raw water, and in the Simulated <br />Dishibution System testing indicate that GMIWA's cunent method of disinfection <br />(free chforine as a disinfectant in the treatrnent plant and in the distribution system) <br />resufts in TTHM and HAA5 concentrations in excess of those allowed by the Stage 1 <br />Disinfection/Disinfectant Byproduct Rule. The Simulated Distribution System tesflng <br />also indicated that these concenirations can be lowered to acceptable leveis by using <br />chloramines for disinfection in the distribution system. <br />FlGUNE-3:TOCHESUL14fOP5UYYENW~ <br />EMII.XCm Cd1dAA110111ESI'NTI fFAPN: <br />GMWIMV.CYPFHDOMlE1~& <br />