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November 30, 2007 NOA Project Number: E07192A 6.6 Percolation Test Forms and Results The completed percolation test form is included in the appendix of this report. A shallow percolation test is defined by the EHD as being between 36 and 42 inches in depth; a satisfactory percolation rate for a shallow test is less than or equal to 60 minutes per inch drop. A deep percolation test is defined as being between 3.5 and 25 feet in depth;a satisfactory percolation rate for a deep test is less than or equal to 30 minutes per inch drop. One percolation test must demonstrate a satisfactory percolation rate within the proposed septic system disposal field of each parcel to utilize a standard septic system. Details of the percolation tests are summarized in Table 5. Table 5. Summary of Percolation Tests. Test No., Percolation Percolation Rate Test Comment Date Tested Test Depth(ft) (minutes/inch) Duration (see notes) Parcel 1,Shallow 2-8-07 3.25 5.55 4 hr. Satisfactory Percolation Rate Note. A satisfactory percolation rafo a"shallow"testis ess than or equal to 60 minutes per inch.A satisfactory percolation rate for a"deep"testis less than or equal to 30 minutes per inch. 6.7 Discussion of Percolation Test Results The soils within the sewage disposal area of the site have demonstrat a satisfactory ercolation j rate in accordance with the requirements of the EHD. 6.8 Discussion of Septic System Sizing Please see section 5.0 of the Nitrate Loading study for details regarding sep syst m sizing. ' �Septic Syste�a Constructio s ould fo the San Joaquin County On-Site Wastewater Disposal / Standardsere applicable. 7.0 CONCLUSIONS Please see Part II,Nitrate Loading Study, Sections 4 and 5, for conclusions and project / recommendations. 7.1 Signatures The signatures of the environmental professionals involved in the preparation of this report can be found at the front of this package. 8