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t <br /> Soil Suitability and Nitrate Loading Evaluation-Update-2 Page 8 of 18 <br /> Great Pacific Nut—Nut Processing Facility Expansion <br /> 3501 Lehman Road, Tracy, California <br /> September 6, 2019 CTE Job#25-071 OG <br /> The test holes for this study were drilled using a truck-mounted Simco 2400 SK-1 drill <br /> rig utilizing 6-inch diameter solid flight auger. Soils were logged in the field by a CTE <br /> Field Geologist and were classified according to the Unified Soil Classification System <br /> (ASTM D2487) based on field testing, and visual observations. The groundwater boring <br /> (B-GW) log and percolation test sheets are included in Appendix A which also contains <br /> the Boring Log Legend and Definition of Soil Terminology as shown on Plates BL1 and <br /> BL2, respectively. Appendix B includes the SJCEHD permit and certified percolation <br /> test results for "P-1". The locations of the groundwater test boring and percolation tests <br /> are shown on Figure 2. <br /> 5.0 GROUNDWATER <br /> Observations of groundwater conditions were made in the test borings at the time of field <br /> exploration. Groundwater was observed in the Boring (B-GW) located at/near the <br /> proposed disposal field at approximately 13.0 feet below existing ground surface (begs). <br /> Based on information contained on the California Groundwater Information Center Map <br /> site (https:Hgis.water.ca.gov/app/ icg iman, ground water flows toward the southwest and <br /> groundwater level, with exception of Spring 2012 when it was on the order of 50 feet <br /> begs, has typically been deeper than about 110 feet begs between 2011 and 2018. Based <br /> on above, the relatively shallow groundwater observed in our subsurface exploration may <br /> represent a perched condition from the heavy rains experienced in the valley this year. <br /> 6.0 SOIL PROFILE <br /> Published (USDA, Soil Survey of San Joaquin County, California, dated October 1992) <br /> mapping indicates soils at the site consist of "Capay clay" described as very deep, <br /> moderately well drained, fine textured, nearly level soil in interfan basins. Septic tank <br /> absorption field rating for Capay soils is indicated to be "very limited" due to ponding <br /> and slow water movement. Based on published geologic mapping --"Geologic Map of <br /> SACRAMENTO • FREMONT • MODESTO <br /> INSPECTION&TESTING•GEOTECHNICAL-ENVIRONMENTAL-CONSTRUCTION ENGINEERING <br />