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• The Water Board's prediction of well longevity may also be based on the installation of the well during an average seasonal groundwater depth. If the well is installed in February, during wet season when the water level is highest,the longevity of the well will be less than if the well is installed in August when the water level will be the lowest. If the County could wait until the seasonal low time of the year to install the well,this would help in this prediction of well longevity. However,the NOV has required the County to collect a years'worth of data prior the placement of waste in its newest module. If the Water Board could relax the length of the monitoring period between well installation and the placement of waste,the longevity of the well could be extended by drilling later during seasonal low water. The County understands the Water Board staffs concerns regarding the double-screened well design.Thus we would like to propose a compromise design of using a single screen length of 30-feet(see attached design). We believe a 30- feet screened well drilled in February would be equivalent to a 25-feet screened well drilled in August, accounting for seasonal fluctuations. I have spoken to Robert McClellon (LEA)and he stated he could approve a 30-feet screened well permit. Please let us know if the 30-feet screened well is acceptable,we will amend our existing permit and simply revise Figure 1 (attached),the workplan will remain unchanged. This will allow us to proceed on schedule. Currently,we are scheduled to drill well MW-6 in the first week of February 2015 (The driller requires a 2-month advance notice). If we delay this any further we would not be able to provide a year's worth of monitoring data as required by the NOV. Thank You 4�bTaj M. Bahadori, PE Senior Civil Engineer San JoaQuin County Solid Waste Voice: 209-953-7316 Email: tbahadori@sjaov.org 1810 E. Hazelton Avenue, Stockton,CA 95205 2