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,Percolation Test Sr7, k Construction ■ Stockton, California I rerracon April il 7, 2017 .Terracon Project No. NA177012 Summary of Percolation Tests. Percolation Percolation Comments Test No. Test Rate Test Duration (see notes) Date Tested Depth (inch) (minutes/inch) P1 Satisfactory percolation 42 41.66 4 hours rate March 15, 2017 Note: A satisfactory percolation rate is 60 minutes per inch or less for shallow leach lines and 30 minutes per inch or less for septic pits per SJEHD,Onsite wastewater Disposal Standards,October 2003. The clay loam soils within the 0 to 3.5 foot range of the proposed septic disposal area at the site demonstrate a satisfactory percolation rate for a standard septic system per EHD requirements. In general, septic system construction should follow the San Joaquin County On-Site Wastewater Disposal Standards where applicable. The on-site soil has relatively low permeability, hence even though not required, seepage pits may be installed at the end of the leach lines as a secondary absorption measure. Our professional services were performed, our findings obtained, and our recommendations proposed in accordance with generally accepted engineering principles and practices. This warranty is in lieu of all other warranties either expressed or implied. Test findings and statements of professional opinion do not constitute a guarantee or warranty, expressed or implied. We appreciate this opportunity to provide environmental services for the subject property. Please contact our office with any questions or concerns. Sincerely, Terracon Consultants, Inc. Lodi Office J(a,cla Wi� 4011111!51070111Y'00� Tamara K. Woods Garret S.H. Hubbart, Principal Field Environmental Scientist Geotechnical Engineer 2588 Attachments: Site Diagram Percolation Test Rate Form Onsite Wastewater Treatment System Permit Responsive ■ Resourceful ■ Reliable 3