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Soil Suitability/ Nitrate Loading Study 1rerracon <br /> Whitlow Property Stockton, CA <br /> November 20, 2019 Terracon Project No. NA197078 <br /> Table 6. <br /> Well Completion Reports. <br /> Form Well Approximate <br /> Number Address Soil Type Depth Distance/Direction from Site <br /> Feet <br /> 0966537 11121 N. Alpine Rd Clay, sand 340 Adjacent North <br /> 805290 11292 N. Alpine Rd Clay, sand 209 Adjacent East <br /> 580239 10697 N. Alpine Rd Clay, sand 265 0.5 miles Southwestwest <br /> 44851 '/2 mile north of NWC Silty clay, clay,sand 209 0.20 miles south <br /> Alpine Rd &8 Mile Rd <br /> 39-715 1 mile north of 8 Mile Rd Clay 185 0.40 miles north <br /> Based on a review of the Well Completion records, the soils within the vadose zone (between 0 <br /> to 90 feet bgs) are anticipated to consist of clay and sand strata. Refer to Appendix G for a copy <br /> 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 /> Six percolation tests total were performed on the site. One percolation test was conducted at <br /> borings B1, B4, B5 and B6 and two percolation tests were conducted at boring B3. <br /> 1.6.3 Boring Preparation and Presaturation <br /> The percolation test borings were advanced with a 4 inch diameter handauger or drilled with an <br /> 8 inch hollow stem auger. Approximately two inches of"pea gravel' was placed in the bottom of <br /> the open boring. A 2.0-inch diameter PVC pipe with perforations towards the bottom was installed <br /> on top of the gravel and the annular space was backfilled with "pea gravel'. Presaturation of the <br /> percolation test hole occurred approximately 24 hours prior to the day of testing. The depth of <br /> water used to pre-soak the shallow borings was approximately 1.0 foot above the top of the gravel. <br /> 1.6.4 Condition of Borings after Presaturation <br /> All borings were dry after the 24-hour pre-soak period. <br /> 1.6.5 Percolation Test Procedure <br /> The percolation tests were conducted in accordance with the requirements of the San Joaquin <br /> County Percolation Test Procedure (Form: EHD 42-01-002 Revised 08-23-2011). There was no <br /> water remaining in the test holes;therefore, Terracon conducted the percolation tests by following <br /> Responsive ■ Resourceful ■ Reliable 11 <br />