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Soil Suitability/ Nitrate Loading Study Irerracon <br /> Gribaudo Property ■Acampo, CA <br /> November 12, 2019 ■ Terracon Project No. NA197081 <br /> Based on the historical information, existing and former agricultural land use and existing septic <br /> systems in the area should be considered potential groundwater contamination sources. Refer to <br /> Section 1.3.2 for further discussion for information regarding the site groundwater wells. <br /> 1.4.3 Water Sample Location <br /> On October 21, 2019, two groundwater samples (GW-1 and GW-2) were collected from a faucet <br /> located at the northeast corner of the residence garage directly attached to the domestic <br /> groundwater well. Two additional groundwater samples (GW-3 and GW-4)were collected directly <br /> from a well tap attached to the agricultural well. Samples GW-1 and GW-3 were collected into a <br /> clean unpreserved plastic 125 milliliter(ml) bottle and analyzed for nitrate as N by EPA Extraction <br /> Method E300.1. Samples GW-2 and GW-4 were collected into two clean glass 40 ml VOAs <br /> preserved with ascorbic and meleic acid and analyzed for DBCP (1,2-Dibromo-3-chloropropane) <br /> by EPA Extraction Method E524.3. The groundwater samples were submitted on ice to <br /> McCampbell Analytical Inc. for analysis. <br /> Nitrate as N was reported at 6.0 mg/L in groundwater sample GW-1 (domestic well) below the <br /> MCL of 10 mg/L-N. Nitrate as N was reported at 5.3 mg/L in groundwater sample GW-3 <br /> (agricultural well) below the MCL of 10 mg/L-N. Groundwater sample GW-2 (domestic well) <br /> reported at 0.18 micrograms per liter (ug/L) below the MCL of 0.2 ug/L for DBCP. Groundwater <br /> sample GW-4 (agricultural well) reported at 0.12 micrograms per liter (ug/L) below the MCL of <br /> 0.20 ug/L for DBCP. <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 for information regarding soil properties. Based <br /> on information obtained from the USDA sources, the site consists of the following soil types. <br /> Responsive■ Resourceful ■ Reliable 8 <br />