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Soil Suitability/ Nitrate Loading Study Irerracon <br /> Shipherd Property■ Ripon, California <br /> August 25, 2020 w Terracon Project No. NA207060 <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 north of the existing residence (Exhibit 2). On <br /> July 31, 2020 two groundwater samples (GW-1 and GW-2) were collected directly from a water <br /> faucet located near the residence (See Exhibit 2). The water faucet was allowed to run for <br /> approximately 10 minutes until the well pump turned on and cycled multiple times. <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 0.83 milligrams per liter (mg/L) in <br /> groundwater sample GW-1 below the MCL of 10 mg/L-N. Groundwater sample GW-2 reported <br /> below laboratory reporting limits of 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 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 Delhi fine sand and consist of somewhat excessively drained soils <br /> with 0 to 5 percent slopes. Parent material consists of wind modified alluvium derived from granitic <br /> rock. Typical soil profiles consist of 0 to 60 inches fine sand. For septic systems, the main <br /> limitation for this soil type is rapid permeability. <br /> Responsive ■ Resourceful ■ Reliable 8 <br />