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Soil Suitability Nitrate Loading Study 1 rerr�con <br /> Recreation Vehicle Service Facility w Lockeford, CA <br /> April 12, 2017• Terracon Project No. NA177006 <br /> The shallow soil boring (P1) was excavated on March 7, 2017 and pre-saturated with <br /> approximately 1.0 foot of water above gravel on March S, 2017. The deep percolation boring(P2) <br /> was excavated and pre-saturated with approximately 3.0 feet of water above gravel on March 22, <br /> 2017. <br /> 1.6.4 Condition of Borings after Presaturation <br /> After the 24-hour soak period, water remained in the shallow boring (P1). The deep boring (P2) 6 ,a) <br /> was dry on the day of testing. <br /> 1.6.5 Percolation Test Procedure <br /> The percolation tests were conducted in accordance with the requirements of the San Joaquin <br /> County EHD. Measurement of the water level during the percolation tests were from a fixed \ <br /> reference point on the PVC casing using a calibrated Solinst electric water level detector with a <br /> depth accuracy of 0.01 feet. All tabulated values on the field data sheet are in decimal feet. <br /> Shallow percolation test (P1) was conducted on March 9, 2017. Water remained in the hole <br /> overnight and was bailed to approximately 6.0 inches above gravel. A thirty minute reading was <br /> recorded; however,there was no change in the water level after 30 minutes. Terracon spoke with <br /> Mr. Steven Shih via telephone who indicate_ ercolation test could be performed for the <br /> site. T, did not observe the shallow boring percolation st. <br /> The deep percolation test (P2) had a duration of one hour and was observed by Mr. Michael <br /> Escotto, San Joaquin County Environmentai_Health representative. Water level readings were <br /> measured and recorde n minute interva s. copy of the field data is included Appendix B. <br /> 1.6.6 Percolation Test Forms and Results <br /> The completed percolation test form with Michael Escotto verification signature is included in <br /> Appendix B of this report. A shallow percolation test is defined by the EHD as being between 36 <br /> and 42 inches in depth. While a deep percolation test is defined by the EHD as being between <br /> 42 inches and 25 feet in depth.. The percolation test must demonstrate a satisfactory percolation b' <br /> rate (less than or equal to 60 minutes per inch drop) within the existing septic system disposal <br /> field of a parcel to utilize a standard septic system. Details of the percolation tests are <br /> summarized in the table below. <br /> Responsive■ Resourceful ■ Reliable 10 <br />