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30 March 2022 AdvancedGeo Project No. 22-6800 AnEmployee-Owned Company Page 6 of 15 4.3. ON-SITE EXISTING WELL DESCRIPTION There is one existing domestic water supply well on the property. The well was installed in September 2006 (SR0048257). The well is composed of 6 -inch diameter polyvinyl chloride (PVC) casing installed in a 12 -inch diameter bore hole to a total depth of 220 feet bsg. The well grout seal is installed to 100 feet bsg. The onsite well provides potable water to the existing residence and subject property. A copy of the well permit is included in Appendix B. 4.4. CONSTITUENTS BEING TESTED FOR IN THE WATER SAMPLE Nitrate (NO3) constituents and 1,2-dibromo-3-chloropropane (DBCP) were tested in the existing groundwater supply well at the subject property. 4.5. GROUNDWATER SAMPLE COLLECTION On 24 March 2022, a sample of the drinking water provided by the current groundwater supply well at 10800 E West Ripon Road, Ripon, California was collected in an unpreserved 0.5 -liter plastic container and two volatile organic analysis (VOAs) vials. The groundwater sample containers were 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), Nitrate as NO3-, and DBCP. 4.6. GROUNDWATER ANALYTICAL REPORT Nitrate as N was detected at 3.6 milligrams per liter (mg/1) and Nitrate as NO3- was detected at 16 mg/I in the water sample; DBCP was not detected above the laboratory reporting limit. The MAI laboratory report (Work Order: 2203F91) 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 property by the EHD on 17 March 2022 to perform a percolation test (Appendix D). On 24 March 2022, a 4 -inch diameter hand auger was utilized to advance a percolation test hole to 42 inches bsg, in the proposed septic system disposal field area. A plan of the specific site features including the percolation test hole locations (i.e., structures, drives, wells, septic systems, large trees, pastures, pools, natural drainage courses, ponds, waterways, etc.) is illustrated in Figure 2.