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18 September 2020 AdvancedGeo <br /> Project No. 20-6116 An Employee-Owned Compony <br /> ` <br /> Page 7 of 15 V,� <br /> 4.6. GROUNDWATER ANALYTICAL REPORT <br /> Nitrate as N was detected at 9.7 milligrams per liter (mg/1) and Nitrate as NO3- was <br /> detected at 43 mg/I in the water sample collected from DW-1. The MAI laboratory report <br /> (Work Order: 2009489)with quality assurance/quality control (QA/QC) reports and chain- <br /> of-custody form are provided in Appendix C. <br /> 5.0. SOIL PROFILE <br /> An OWTS Permit was issued for Parcel 1 by the EHD on 31 August 2020 to perform <br /> percolation tests (Appendix C). On 09 September 2020, a 4-inch diameter hand auger <br /> was utilized to advance two percolation test holes to 42 inches bsg at Parcel 1. <br /> Percolation tests were performed near the southern property boundary, in the southwest <br /> corner of the nursery (P-1) and in the orchard, south of the southwest residence (P-2). <br /> Percolation test hole locations are depicted in Figure 3. <br /> Percolation test hole P-2 will be located on the subject property following reapportion of <br /> the parcels and will be used to determine the percolation rate for the subject <br /> property/Remainder Parcel. <br /> A plan of the specific site features including the percolation test hole locations <br /> (i.e., structures, drives, wells, septic systems, large trees, pastures, pools, natural <br /> drainage courses, ponds, waterways, etc.) is illustrated in Figures 2 and 3. <br /> 5.1. SOIL PROFILE PIT INCLUDING DEPTH AND DIMENSIONS <br /> The percolation test holes were advanced to total depths of 42 inches bsg using a four- <br /> inch diameter hand auger (Appendix D). <br /> 5.2. SOIL LITHOLOGY AS RELATED TO FUTURE ONSITE SEPTIC USES <br /> The soil was visually described in accordance with the Unified Soil Classification System <br /> (USCS) by a representative of AGI under the supervision of a California Professional <br /> Geologist. The soil collected from the percolation test hole borings consisted of dry, fine- <br /> grained sand from surface grade 42 inches bsg. The soil type at the base of the borehole <br /> is considered semi-permeable to permeable and should be sufficient for liquid waste <br /> disposal and treatment. <br /> 6.0. PERCOLATION TEST INFORMATION <br /> Percolation soil suitability tests were performed at Parcel 1 under EHD permit No. <br /> SR0082532 using four-inch diameter soil borings established to 42 inches bsg. A site <br />