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Heterotrophic Plate Count <br /> Phosphate <br /> Ammonia Nitrogen <br /> Chemical Oxygen Demand <br /> Skdogical Oxygen Demand <br /> Additionally, quarterly-groundwater monitoring and sampling will be conducted <br /> for the three perimeter monitoring walls at this time. <br /> The ORCO Is anticipated to East from three to six months. At the end of the third <br /> month, the potency of the ORCOD will be evaluated and, if found to be sufficient, <br /> a second three-month monitoring episode will be conducted. <br /> Task 4-ORCOEvailuation <br /> Upon depletion of the ORCO, the sock will be removed and the wells will be <br /> allowed. to stabilize. Upon stabilization, a complete quar#crly :Psi ing and <br /> monitoring episode will be conducted. Results of the quarterly sampling, along <br /> with the monthly data, measured during the ORCS placement, will be used to <br /> evaluate the effectiveness.of ORC00 at the site. <br /> .If found to be effective, then the degree of biodegradation will be evaluated and <br /> a decision made as to whether additional LRCS should be installed. If <br /> warranted, a second application andlor a more aggressive approach to the <br /> ORCe placement wilt be proposed. <br /> We will keep you informed of our progress and proposed activities_ Copies of all <br /> documents will be forwarded to both your office and the Regional Water Quality Control <br /> Board. In your directive, please indicate the-person to whom we should address all <br /> Regional Board correspondence. <br /> Please feel free to call if you have any questions. <br /> Respectfully. <br /> JJW GIEOSCIENCE S Inc. <br /> Daniel D. DaUM <br /> ccY Mr. Luis Lechich, Valley Showcase <br /> Mr. Bill Hunter, William J. Hunter&Assoaâ–ºates <br /> Mr_ lion Lights Del-Tech <br />