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State of California <br />Well Completion Report <br />Form DWR 188 Submitted 11/28/2023 <br />WCR2023-012872 <br />Owner's Well Number MW551C Date Work Began 10/18/2023 <br />Local Permit Agency San Joaquin County Environmental Health Department <br />Secondary Permit Agency Permit Number 0044897 <br />Well Owner (must remain confidential pursuant to Water Code 13752) <br />Name CONFLUENCE TECHNICAL SERVICES INC, <br />Mailing Address 6821 8th Street <br />City Rio Linda State CA Zip 95673 <br />Well Location <br />Date Work Ended 10/20/2023 <br />Permit Date 09/25/2023 <br />Planned Use and Activity <br />Activity New Well <br />Planned Use Monitoring <br />Address 13395 Englewood WAY APN <br />City Lathrop Zip 95330 County San Joaquin Township 01 S <br />Latitude 37 50 23.8689 N Longitude -121 16 35.4511 W Range 06 E <br />Section 23 <br />Deg. Min. Sec. Deg. Min. Sec. <br />Baseline Meridian Mount Diablo <br />Dec. Lat. 37.8399636 Dec. Long. -121.2765142 <br />Ground Surface Elevation <br />Vertical Datum Horizontal Datum WGS84 Elevation Accuracy <br />Location Accuracy Location Determination Elevation Determination Method <br />Method <br />Borehole Information <br />Depth from <br />Surface <br />Feet to Feet <br />Water Level and Yield of Completed Well <br />Orientation Vertical <br />Specify <br />Depth to first water (Feet below surface) <br />5 <br />10 <br />Depth to Static <br />Drilling Method Auger Drilling Fluid <br />None <br />SM, well graded fine sand with silt 85% fine sand 15% silt. Dry, non -plastic, cohesive olive brown 2.5yr 4/3. <br />15 <br />20 <br />Water Level (Feet) Date Measured <br />Estimated Yield" (GPM) Test Type <br />20 <br />Total Depth of Boring 140 <br />Feet <br />25 <br />35 <br />Silty sand 85% sand 15% silt light olive brown 2.5 y 5/3 moist non -cohesive <br />Test Length (Hours) Total Drawdown (feet) <br />Total Depth of Completed Well 138 <br />Feet <br />•May not be representative of a well's long term yield. <br />Geologic Log - Free Form <br />Depth from <br />Surface <br />Feet to Feet <br />Description <br />0 <br />5 <br />Silt, olive brown 2.5yr 4/3 dry, non -plastic non -cohesive <br />5 <br />10 <br />Cleyey sand 70% fine sand 30% clay. Olive brown 2.5 yr 4/3 dry, low plasticity, cohesive laminated. <br />10 <br />15 <br />SM, well graded fine sand with silt 85% fine sand 15% silt. Dry, non -plastic, cohesive olive brown 2.5yr 4/3. <br />15 <br />20 <br />Silty sand with trace clay 70% fine sand 25% silty 5% clay. Olive brown 2.5y 4/3 cohesive laminated. <br />20 <br />25 <br />Clayey sand with trace silt 70% fine sand 25% clay 5% silt. Olive brown 2.5 y 4/3. Low plasticity cohesive laminated. <br />25 <br />35 <br />Silty sand 85% sand 15% silt light olive brown 2.5 y 5/3 moist non -cohesive <br />35 <br />45 <br />Silty sand 70% fine sand 30% silt. Light olive brown 2.5y 5/3 moist non -cohesive. <br />45 <br />55 <br />Sandy silt 60% silt 40% sand light olive brown 2.5y 5/3 moist non -cohesive <br />55 <br />60 <br />with trace fine sand 95% clay 5% fine sand brown 10y 5/3 moist, high plasticity cohesive <br />60 <br />75 <br />Clayey san 70% fine sand 30% clay brown 10 yr 5/3 wet, slow dilatency, non -plastic. <br />75 <br />80 <br />Sandy lean clay 70% clay 30% sand yellowish brown 10yr 5/4 moist low-plasticy cohesive. <br />80 <br />90 <br />Clayey sand 60% fine sand 40% clay grayish brown 10 yr 5/2 moist, non -plastic <br />90 <br />100 <br />Sandy lean clay 70% clay 30% fine sand light brownish gray 10yr 6/2 moist low plasticity cohesive. <br />100 <br />105 <br />Fat clay with few sand 90% clay 10% fine sand pale brown 10yr 6/3 moist high plasticity. <br />Form DWR 188 rev. 12/19/2017 Page 1 of 2 <br />