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Soil Suitability/Nitrate Loading Study Irerracon <br /> Proposed Commercial Truck Yard ■ Stockton, CA <br /> August 16, 2019 ■ Terracon Project No. NA197053 <br /> 1.5 Soil Profile and Geologic Information <br /> The site is depicted on the Geologic Map of California 2010, as within generalized quaternary <br /> Pleistocene and Holocene deposits which are comprised primarily of unconsolidated and semi- <br /> consolidated alluvium, lake, playa, and terrace deposits. <br /> Terracon reviewed the United States Department of Agriculture (USDA) Natural Resources <br /> Conversation Service (NRCS) Web Soil Survey for information regarding soil properties. Based <br /> on information obtained from the USDA sources, the site consists of the following soil types. <br /> Table 4. <br /> USDA Soil Types. <br /> Map Symbol Name Percent of Site Location <br /> 266 Veritas fine sandy loam 100% Across the site <br /> According to the USDA Soil Survey of San Joaquin County(1992), San Joaquin loam soils consist <br /> of moderately well drained soils with 0 to 2 percent slopes. Typical soil profiles consist of 0 to 54 <br /> inches fine sandy loam and 54 to 70 inches hardpan. The main limititations for this soil type is <br /> depth to hardpan. For septic system permeability maybe overcome by ripping the hardpan. Refer <br /> to Section 2.1 for further discussion of the soil information. <br /> 1.5.1 Soil Boring Locations <br /> Based on a review of the site plan, the proposed primary and reserve leachfields will be located <br /> southeast of the proposed office building on the southern portion of the site. The percolation test <br /> boring (B1)and soil profile boring (B2)were placed near the anticipated primary leachfield. Boring <br /> B2 was placed within 7 feet of boring B1 <br /> Table 5. <br /> Soil Boring Locations. <br /> Boring No. Latitude Longitude <br /> B1 37.887979 -121.276043 <br /> B2 --- --- <br /> Refer to Appendix A, Exhibit 2 for the boring location. <br /> 1.5.2 Soil Boring Dimensions <br /> Soil borings B1 and B2 were advanced with a 4 inch diameter handauger. Boring B1 was <br /> advanced to 3.5 feet bgs and boring B2 was advanced 4.7 feet bgs until auger refusal. <br /> Responsive■ Resourceful■ Reliable 9 <br />