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KLEINFELDER / 8. CONCLUSIONSrlr .. The results of our percolate p-tesf ndicate that a suitable soil percolation stratum qxsfs pnl� on the rce (east parcel split from APN 009-170-04) at the shallow percolation test location at the depth tested and was observed by a representative of SJCEHD. A suitable soil condition is defined as a stratum capable of percolating water at a rate of 60 min/inch or faster at shallow depths and 30 min/inch for deep tests. It is our professional opinion that a conventional septic tank/leach trench sewage disposal system designed pgr_SJEEHfD--critega could theoretically adequately serve a proposed residence 6n`thee proposed parcel-,,2. However, it should be recognized that only one percolation test passed-o sixteen tests performed in the area. Because of the cemented and fine grained subsurface soils encountered and the failed percolation tests, which were not observed by a representative of SJCEHQ it suro iD[llOn that if residence were constructed on parcel 2 in the future. additional percolation tests should be r)erformed in the actual area of the proposed leach field. /The results of our percolation tests performed on proposed parcels 1, 3, and 4 indicate V that a suitable soil percolation stratum does not exist, at least at the percolation test locations at the depths tested. In our opinion this is because of the fine grained and cemented nature of the soils encountered. As previously stated, a suitable soil condition is defined as a stratum capable of percolating water at a rate of 60 min/inch or faster at shallow depths and 30 min/inch for deep tests. Based on these results, it is olrr nrnfessionaI ppipjoo that a, regventional Spptmr lank/leach trench sewage disposal system designed ger SJCEHD criteria would not adequately serve any residences that would ever be built on the oroposed_parcels 1. 3, and 4 and that there i �,��_I;[�gjneerad gystem. We understand that cu.��tttl r f1Q �.��I,�gm�ntaic proposed at the proiect cite• howev .r�,_ wer QMa eLtd,�It Ir - d .v -Iopment takes lacp e, homeowners be made aware of the difficult_percolation characteristics of the near-surface soils at the site. TTm As previously mentioned, there wa- OQ concentration of DBC P found in detectable ` amounts in the groundwater sampled at the project site. Various dry creek beds were noted within the site and approximately 100 feet south of the proposed parcels. A reservoir exists approximately 3,000 feet north of the proposed parcels. Because of the distance to groundwater and the gradient of the grnundwatpir, the impart to carfare watpr is estimatpri to he Inw, LIMITATIONS I/Kleinfelder has prepared this report in accordance with the generally accepted standards of care that exist in San Joaquin County at the time of writing. It should be recognized that definition and evaluation of geologic and chemical subsurface 72113.E01/ST06R813 July 26,2006 2006 Kleinfelder, Inc. Page 5 of 6