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City of Stockton -5- 14 August 1990 <br /> At a minimum, the Technical Report must contain the following information: <br /> a) The precise method to eliminate acute invertebrate toxicity. If the <br /> City elects to determine the chemical basis of toxicity then it should <br /> employ EPA/600/3-88/034, EPA/600/3-88/035, and EPA/600/3-88/036 <br /> procedures. Alternatively, if the City elects the treatability option, <br /> then the Report must precisely describe the bench-top tests it proposes <br /> to evaluate toxicity removal and cite appropriate references. <br /> b) See I .B. l .b) , above. <br /> c) See I.B. l .c) , above. <br /> 2. See I .B.2. , above. <br /> 3. See I .B.3. , above. <br /> III. ONGOING TOXICITY MONITORING <br /> The Technical Report submitted by the City recommended the following two <br /> modifications in the ongoing toxicity test procedures: 1) use of static renewal <br /> or flow-through procedures in lieu of the current static test procedures, and 2) <br /> use of an alternative dilution/control water. Staff is still reviewing these <br /> issues and a response will be sent in early September 1990. In the meantime, the <br /> City should continue to follow the same procedures as have been used in the past. <br />