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lierracon Soil Suitability / Nitrate Loading Study <br />Buddhist Temple Proposed Dormitory • Stockton, California <br />July 11,2019 • Terracon Project No. NA177056 <br />Based on the historical information, the past agricultural land use and septic systems on the site <br />and 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 well. <br />1.4.3 Water Sample Location <br />On May 9, 2019, two groundwater samples (GW-tand GW22) were collected from a faucet near <br />the eastern storage container along the northern site boundary and submitted on ice to <br />McCampbell Analytical Inc. for analysis. Sample GW-1 was collected into a clean unpreserved <br />plastic 125 milliliter (ml) bottle and analyzed for nitrate as N by EPA Extraction Method E300.1. <br />Sample GW-2 was collected into two clean glass 40 ml VOAs preserved with ascorbic and meleic <br />acid and analyzed for DBCP (1,2-Dibromo-3-chloropropane) by EPA Extraction Method E524.3. <br />Nitrate as N was reported at 27 mg/L in groundwater sample GW-1 above the MCL of 10 mg/L-N „ <br />or 120 mg/L nitrate above the MCL of 45 mg/L nitrate. Groundwater sample GW-2 reported below <br />laboratory reporting limits of 0.010 micrograms per liter (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 General Geologic Information and Soil Profile <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 alluvium, lake, playa, and <br />terrace deposits; unconsolidated and semi-consolidated. <br />Based on a review the United States Department of Agriculture (USDA) Natural Resources <br />Conservation Service (NRCS) Web Soil Survey, site soils consist of Devries sandy loam. Devries <br />sandy loam soils consist of somewhat poorly drained soils with 0 to 2 percent slopes. Parent <br />material consists of coarse-loamy alluvium derived from igneous metamorphic and sedimentary <br />rock. Refer to Section 1.5.3 and Section 2.1.2 for additional information. <br />Responsive • Resourceful • Reliable 10