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Soil Suitability and Nitrate Loading Evaluation CTE Job 9 25-0710 <br /> Great Pacific Nut—Nut Processing Facility Expansion <br /> 3501 Lehman Road <br /> Tracy, California <br /> August 1, 2019 Page 4 of 10 <br /> Based on conversations with SJCEHD it was suggested that a new test location should be <br /> determined and a new inspection date scheduled. A new test hole designated "P-1" in this report <br /> _r ->,was located at an alternative leach field location (east of original location) and was excavated on <br /> April 24, 2019; testing was performed and inspected by SJCEHD on July 19, 2019. In addition, a <br /> subsurface boring was excavated to 25.0± ft on 4/24/19 to assess groundwater level in the vicinity <br /> of the proposed leach field. Percolation test results and the groundwater boring (B-GW) log are <br /> attached as Appendix-A. The percolation test and groundwater boring locations are shown on the <br /> "Exploration Map", attached as Figure-2. <br /> The test holes and boring for this study were drilled using a truck-mounted Simco 2400 SK-1 drill <br /> rig utilizing 6-inch diameter solid flight auger. The maximum explored depth was 25.0± feet <br /> below existing ground surface (begs). Soils were logged in the field by a CTE Field Geologist and <br /> were classified according to the Unified Soil Classification System (ASTM D2487) based on field <br /> testing, and visual observations. <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 proposed <br /> disposal field at approximately LL.0 feet below existing ground surface (begs). Based on <br /> information contained on the California Groundwater Information Center Map site <br /> (https:Hgis.water.ca.gov/app/gicii-na/ , ground water flows toward the southwest and groundwater <br /> level, with exception of Spring 2012 when it was on the order of 50 feet bgs, has typically been <br /> deeper than about 110 feet bgs between 2011 and 2018. Based on above, the relatively shallow <br /> groundwater observed in our subsurface exploration may represent a perched condition from the <br /> heavy rains experienced in the valley during the rainy season of late 2018 to spring of 2019. <br /> 6.0 SOIL PROFILE <br /> Published (USDA, Soil Survey of San Joaquin County, California, dated October 1992) mapping <br /> indicates soils at the site consist of"Capay clay" described as very deep, moderately well drained, <br />