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13 August 2019 AdvancedGeo AGE Project No. 19-4782 1- 1 ivi ro n menta I Page 6 of 14 development at the subject property. The well was installed in September 2011 under EHD permit number SR63382. The well is constructed to a total depth of 314 feet bsg with a 6-inch diameter plastic casing and 0.45-inch well screen installed from 294 to 314 feet. The grout seal is installed to 200 feet bsg and the static water level in the well following completion on 14 September 2011 was 67 feet. The well is currently used to service 17699 ST RT 120, but will also be used to service the planned residence at the subject property. A well completion report and EHD permit for the well is presented in Appendix B. 4.4. CONSTITUENTS BEING TESTED FOR IN THE WATER SAMPLE Nitrate (NO3) constituents were tested in the existing groundwater supply well at 17699 ST RT 120. 4.5. GROUNDWATER SAMPLE COLLECTION On 18 July 2019, a sample of the drinking water supplied by the current groundwater supply well at 17699 ST RT 120 was collected in an unpreserved 0.5-liter plastic container. The groundwater sample container was properly labeled, placed in a chilled container and transported under chain-of-custody protocols to McCampbell Analytical, Inc. (MAI), a California Environmental Laboratory Accreditation Program (ELAP)-certified laboratory. The sample was analyzed for Nitrate as Nitrogen (N) and Nitrate as NO3-. 4.6. GROUNDWATER ANALYTICAL REPORT Nitrate as N was detected at 2.7 milligrams per liter (mg/1) and Nitrate as NO3- was detected at 12 mg/I in the water sample. The MAI laboratory report with quality assurance/quality control (QA/QC) reports and chain-of-custody form are provided in Appendix C. 5.0. SOIL PROFILE An OWTS Permit was issued for the site by the EHD on 03 July 2019 to perform a percolation test (Appendix D). On 18 July 2019, a 4-inch diameter hand auger was utilized to advance a percolation test hole to 40 inches bsg on the parcel, in the proposed septic system disposal field area. A plan of the specific site features including the percolation test hole location (i.e., structures, drives, wells, septic systems, large trees, pastures, pools, natural drainage courses, ponds, waterways, etc.) is illustrated in Figure 2.