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i <br /> Groundwater Monitoring Well Construction Workplan <br /> January 2024 <br /> Non-Water or Non-Freshwater Bearing Formations <br /> All of the freshwater bearing formations and sediments mentioned above are underlain by <br /> various marine formations and/or igneous and metamorphic rocks,potentially similar to those <br /> exposed in the Coast Ranges.The uppermost beds of the San Joaquin Formation underlie the <br /> freshwater bearing sediments(Hotchkiss 1971)which are predominantly marine in origin and <br /> contain ancient sea water. MW-203 exploration borehole is believed to have penetrated into the <br /> San Joaquin Formation at a depth of about 1,030 feet bgs where drilling encounter consolidated <br /> sediments with some carbonate-cementation. <br /> The base of fresh water is projected to be about 1,800 feet bgs at the well site. MW-203 <br /> geophysical survey suggests the base of fresh water is greater than 1,350 feet bgs in the area. <br /> MW-204's total drilling depth is 1,130 feet bgs, staying well above the base of fresh water. <br /> i <br /> I <br /> I <br /> i <br /> I <br /> GEI Consultants, Inc. 7 <br />