Laserfiche WebLink
Soil Suitability/ Nitrate Loading Study Irerracon <br /> Soares Property ■ Escalon, CA <br /> December 13, 2019 ■ Terracon Project No. NA197095 <br /> sources. According to the State Water Resources Control Board website, there were no nitrate <br /> impacted wells reported within 2,000 feet of the site. <br /> 1.4.3 Water Sample Location <br /> A domestic groundwater well is currently located on the site (Exhibit 2); however, the well was not <br /> operational at the time of Terracon's field work. Terracon received permission to collect <br /> groundwater samples from the adjoining eastern property (28536 E. Lemon Avenue). On <br /> November 22, 2019, two groundwater samples (GW-1 and GW-2) were collected from a faucet <br /> directly attached to the offsite groundwater well tank (See Exhibit 2). <br /> 1 .4.4 Groundwater Sample Analysis <br /> Sample GW-1 was collected into a clean unpreserved plastic 125 milliliter(ml)bottle and analyzed <br /> for nitrate as N by EPA Extraction Method E300.1. Sample GW-2 was collected into two clean <br /> glass 40 ml VOAs preserved with ascorbic and meleic acid and analyzed for DBCP (1,2-Dibromo- <br /> 3-chloropropane) by EPA Extraction Method E524.3. <br /> 1.4.5 Groundwater Sample Handling <br /> The groundwater samples were immediately placed on ice and submitted to McCampbell <br /> Analytical Inc. for analysis. Nitrate as N was reported at 13 mg/L in groundwater sample GW-1 <br /> slightly above the MCL of 10 mg/L-N. Groundwater sample GW-2 reported below laboratory <br /> reporting limits of at 0.010 micrograms per liter (ug/L) for DBCP. <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 3. <br /> USDA Soil Types. <br /> Map Symbol Name Percent of Site Location <br /> 142 Delhi loamy sand 100% All of site <br /> Delhi loamy sand soils consist of somewhat excessively drained soils with 0 to 2 percent slopes. <br /> Parent material consists of wind-modified alluvium from granitic rock sources. Typical soil profiles <br /> consist of 0 to 26 inches loamy sand and 26 to 60 inches sand. According to the USDA Soil <br /> Responsive ■ Resourceful ■ Reliable 8 <br />