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Soil Suitability/ Nitrate Loading Study 1rerracon <br />Eagle's Nest Motorcycle School Stockton, California <br />July 27, 2021 Terracon Project No. NA217040 <br />1.4.3 Water Sample Location <br />There are no groundwater wells located on the site; therefore, no groundwater samples were <br />collected. Based on interviews with the client, drinking water for the site will be provided by Cal <br />Water. <br />1.4.4 Groundwater Sample Analysis <br />Refer to Section 1.4.3. <br />1.4.5 Groundwater Sample Handling <br />Refer to Section 1.4.3. <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 and USDA Soil Survey of San Joaquin County <br />(1992) for information regarding soil properties. Based on information obtained from the USDA <br />sources, site soils consist of Jacktone-Urban land complex which consist of somewhat poorly <br />drained soils with 0 to 2 percent slopes. Parent material consists of alluvium derived from mixed <br />rock sources. Typical soil profiles consist of 0 to 24 inches clay, 34 to 37 inches indurated, 37 to <br />46 inches stratified fine sandy loam to clay loam, and 42 to 60 inches cemented soils. <br />1.5.1 Soil Boring Locations <br />Based on information provided by the client, the proposed leach field will be located east- <br />southeast of the proposed building (Exhibit 2). Three percolation test borings P4, P5, P6 were <br />advanced in the vicinity of the proposed leach field. <br />1.5.2 Soil Boring Dimensions <br />Three borings were advanced using a track mounted drill rig with a 6 -inch diameter auger to 25 <br />(P4), 16 (P5), and 3.5 (P6) feet bgs. <br />Responsive ■ Resourceful ■ Reliable 9 <br />