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Mr. Mike Desso • - 4 - • 3 October 2006 <br /> confirmation sampling shows that the COC is above the PHG (or MCL if a PHG has <br /> not been established). <br /> 10.Domestic supply well interim response. The Draft Plan should be revised to indicate <br /> that weekly sampling will be reduced after 4 weekly sampling results are less than the <br /> QLs, and after approval by the Regional Water Board. <br /> 11.Domestic supply well long-term response. Regional Water Board staff request no <br /> changes to this response. <br /> 12.Agricultural supply well initial response. If confirmation sampling indicates that wells <br /> are potentially threatened, threatened, potentially impacted, or impacted, the <br /> frequency of sampling should be established on a case-by-case basis after <br /> consultation and approval by the Regional Water Board. <br /> 13.Agricultural supply well long-term response. Long-term responses should be made <br /> on a case-by-case basis following consultation and approval by the Regional Water <br /> Board. <br /> 14.Municipal supply well initial response. The Draft Plan should be revised to indicate <br /> that a threatened or impacted well will be sampled on a monthly basis. After one year <br /> of monthly sampling, the sampling frequency may be modified after consultation and <br /> approval by the City of Ripon and by the Regional Water Board. Also, the Draft Plan <br /> should be revised to indicate that the responses for threatened or impacted wells will <br /> be made on a case-by-case basis after consultation with and approval by the City of <br /> Ripon and the Regional Board. <br /> 15.Municipal supply well long-term response. Regional Water Board staff request no <br /> changes to this response. <br /> If you have any questions, please contact Jim Brownell at (916) 464-4675, or by email at <br /> jbrownell@waterboards.ca.gov. <br /> &""1 <br /> James R. Brownell, M.S., P.G. <br /> Engineering Geologist <br /> cc: Distribution list <br />