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Soil Suitability/ Nitrate Loading Study Irerracon <br /> Betschart Property Lodi, CA <br /> July 19, 2019 Terracon Project No. NA197044 <br /> Based on a review of the Well Completion record, the soils within the vadose zone (between 0 <br /> and 80 to 150 feet bgs) are anticipated to consist of sand, clay, and and/or sandy gravel layers. <br /> Refer to Appendix G for a copy of the Well Completion record. <br /> 1.6 Percolation Test Information <br /> 1.6.1 Percolation Test Locations <br /> Refer to Section 1.5.1 and Appendix A, Exhibit 2. <br /> 1.6.2 Number of Percolation Tests <br /> One percolation tests (B1) was performed. <br /> 1.6.3 Boring Preparation and Presaturation <br /> The percolation test boring (B1) was handaugerd on June 26, 2019. Approximately two inches <br /> of "pea gravel' was placed in the bottom of the open boring. A 2.0-inch diameter PVC pipe with <br /> perforations towards the bottom was installed on top of the gravel and the annular space was <br /> backfilled with "pea gravel". Presaturation of the percolation test hole occurred on July 2, 2019 <br /> approximately 24 hours prior to the day of testing. The depth of water used to pre-soak the <br /> shallow borings was approximately 1.0 foot above the top of the gravel. <br /> 1.6.4 Condition of Borings after Presaturation <br /> Boring B1 wasdry intact after the 24-hour pre-soak period. <br /> 1.6.5 Percolation Test Procedure <br /> On July 3, 2019, the percolation test was conducted in accordance with the requirements of the <br /> San Joaquin County Percolation Test Procedure (Form: EHD 42-01-002 Revised 08-23-2011). <br /> There was no water remaining in the test holes and approximately 0.5 feet of water drained from <br /> the test hole within the first 30 minutes of the test; therefore, Terracon conducted the percolation <br /> tests by following Procedure #3. Terracon added clear water approximately 0.5 feet above the <br /> top of the gravel and recorded the drop in water level in 5 minute intervals over a one hour period. <br /> Measurement of the water level during the percolation test was from a fixed reference point on <br /> the PVC casing using a calibrated Solinst electric water level detector with a depth accuracy of <br /> 0.01 feet. All tabulated values on the field data sheet are in decimal feet. The percolation test <br /> was observed by Mr. Jeffrey Wong, Registered Environmental Health Specialist. <br /> Responsive ■ Resourceful ■ Reliable 10 <br />