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State of California Well Completion Report Form DWR 188 Submitted 11/28/2023 WCR2023-012855 Owner's Well Number MW552C Date Work Began 10/16/2023 Local Permit Agency San Joaquin County Environmental Health Department Secondary Permit Agency Permit Number 0044898 Well Owner (must remain confidential pursuant to Water Code 13752) Name CONFLUENCE TECHNICAL SERVICES INC, Mailing Address 6821 8th Street City Rio Linda State CA Zip 95673 Well Location Date Work Ended 10/17/2023 Permit Date 09/21/2023 Planned Use and Activity Activity New Well Planned Use Monitoring Address 845 Waterman AVE APN City Lathrop Zip 95330 County San Joaquin Township 01 S Latitude 37 50 26.4026 N Longitude -121 16 43.9021 W Range 06 E Section 23 Deg. Min. Sec. Deg. Min. Sec. Baseline Meridian Mount Diablo Dec. Lat. 37.8406674 Dec. Long. -121.2788617 Ground Surface Elevation 0 Vertical Datum NAVD88 Horizontal Datum WGS84 Elevation Accuracy 1 Ft Location Accuracy Location Determination Elevation Determination Method Other Method Borehole Information Depth from Surface Feet to Feet Water Level and Yield of Completed Well Orientation Vertical Specify Depth to first water (Feet below surface) 20 25 Depth to Static Drilling Method Auger Drilling Fluid None Sandy lean clay (55% clay 45% fine sand grayish brown (2.5 y 5/2 30 40 Water Level (Feet) Date Measured Estimated Yield" (GPM) Test Type 40 Total Depth of Boring 132 Feet 55 65 Fat clay with sand (90% clay 10% fine sand light olive brown 2.5Y 5/3 Test Length (Hours) Total Drawdown (feet) Total Depth of Completed Well 130 Feet •May not be representative of a well's long term yield. Geologic Log - Free Form Depth from Surface Feet to Feet Description 0 20 Very fine olive brown (2.5y 4/3) silt, dry Non -plastic cohesive, laminated 20 25 lean clay. 60% clay 40% fine sand. Grayish brown (10yr 5/2) 25 30 Sandy lean clay (55% clay 45% fine sand grayish brown (2.5 y 5/2 30 40 Sandy lean clay with trace small gravels (45% fine sand, 5% small gravel, 50% clay brown (10yr 5/3) 40 55 sand (70% fine sand 30% clay. Grayish brown 2.5Y 5/2. Well graded find sand 55 65 Fat clay with sand (90% clay 10% fine sand light olive brown 2.5Y 5/3 65 70 Sandy fat clay (80% clay 20% fine sand light olive brown laminated well graded 70 80 Sandy fat clay 70% clay 30% fine sand grayish brown 2.5Y 5/2 80 85 Fat clay grayish brown 2.5y 5/2 85 90 Fat clay with sand and trace small gravels (70% clay 25% fine sand and 5% small gravels well graded dark gray 10Y 4/1 90 100 lean clay with sand grayish brown 2.5y 5/2. 85% clay 15% fine sand medium plasticity moist laminated well graded 100 105 Well graded sand wih trace small gravels 95% medium to fine grained sand 5% small gravels light olive borwn 2.5Y 5/3 moist grain size decreasing with depth 105 110 j Fat clay with trace fine sand 95% clay 5% fine san grayish brown 10Y 5/2 percent of sand increasing with depth to 50% fine sand moist highly plastic cohesive Form DWR 188 rev. 12/19/2017 Page 1 of 2