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Percolation Test Irerracon <br /> Pickens Residence o Tracy, California <br /> August 14, 2018■ Terracon Project No. NA181172 <br /> CONCLUSIONS AND RECOMMENDATION <br /> Based on the results of the field work, site soils consist primarily of dry clay in the upper 1.8 feet <br /> and fine sand to a fine sandy silt with clay from 1.8 feet to 10 feet bgs. A visual inspection of the <br /> soils from the percolation test and soil profile borings point to favorable conditions for shallow <br /> septic disposal. The presence of sandy soils at depths to 10 feet bgs should allow for adequate <br /> seepage or percolation. Based on the percolation test results (5 minutes/inch), the soils within <br /> the proposed sewage disposal area appear suitable for a standard septic system given the <br /> percolation rate is well below 60 minutes/inch. Septic system construction should follow the San <br /> Joaquin County Onsite Wastewater Treatment Systems Standards where applicable. <br /> LIMITATIONS <br /> The conclusions of this report are based on the information provided regarding the existing and <br /> proposed development, the use of the subject property, and the site conditions as they existed <br /> at the time we excavated our soil borings and performed the percolation test. It was assumed <br /> that the soil borings and percolation test results are representative of the subsurface conditions <br /> in the general area. <br /> Our professional services were performed, our findings obtained, and our conclusions proposed <br /> in accordance with generally accepted engineering principles and practices. This warranty is in <br /> lieu of all other warranties either expressed or implied. Test findings and statements of <br /> professional opinion do not constitute a guarantee or warranty, expressed or implied. <br /> We appreciate the opportunity to be of service to you on this project. Our professionals provide <br /> geotechnical, environmental, construction materials, and facilities services on a wide variety of <br /> projects locally, regionally and nationally. For more detailed information on all of Terracon's <br /> services please visit our website at www.terracon.com. If there are any questions regarding this <br /> report or if we may be of further assistance, please do not hesitate to contact us. <br /> Sincerely, ��� ""LJu,,.-' <br /> !. � <br /> Terracon Consultants, Inc. <br /> C No. 72446 <br /> ExP. *� <br /> Tamara K. Woods Aaron Mejorado, PE sr7T C►VIL/ <br /> Field Environmental Scientist Senior Engineer <br /> Attachments: Site Location Map, Exploration Plan, Boring Logs, Percolation Test Permit, Percolation <br /> Test Rate Form <br /> Responsive■ Resourceful■ Reliable 3 <br />