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SOIL.SUITABILITY STUDY <br /> _ ROBERTSON PROPERTY <br /> - 25122 SOUTH BANTA ROAD,TRACY, CA <br /> -TABLE OF CONTENTS <br /> - age No. <br /> 1.0. INTRODUCTION'AND PROPOSED DEVELOPMENT . . . . . . . . . . . . . . . . . . . . . . . .. 4 <br /> 1.1 Site Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ..... . . . . . . . . . . . . . . . 4 <br /> 1:2 Proposed Development 2 <br /> 1.3 Site Vicinity . . . . . .. ... . . .. . . . ... . . . ... . . . . . . . . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 <br /> ^ <br /> 1.4 . - Site Map . . -. . . . . . . . .-. . . . . . . . . -. . . . . . . . . . . ... . 2 <br /> F1 <br /> 2.0 PRESENT AND PAST USES OF THE SITE .:. . . . . ..... .7. . . . . . . . . . . . . . . . . . . . . . . . . 2 <br /> 2.1 Past and Present Site Use . . . . I . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 <br /> =3.0 EXISTING AND PROPOSED SEPTIC TANK USAGE . . . . . . . . . . . . . ... . . . . . . . . . . <br /> 3.1 Existing On-Site Septic Tank Usage <br /> 3.2 On-Site.Septic Permit History ... . . . . . . . . . . . . . . . . ... . . . . . . . . . . . . . . . . . 3 <br /> 3.3 On-Site Sep c Repair Permit History . . . . . . . . . . . . . . . . . . . . . . ... . . . . . . . 3 <br /> 3.4 Existing Septic'Tank Usage in the Vicinity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 <br /> .3.5- Septic Permit History in the Vicinity . . . . .. . . . . . . . . . . . . . . 3 <br /> ` <br /> 3.6,-- Septic Repair Permit History in the Vicinity . . ... . . . . . . . . . . I . . . . . . . . . . I . . . . .. 4 . <br /> 3.7 Expected On-Site Maximum Septic Tank Usage . . . . . . . . . . . . . . . . . . . . . . . . . 4 <br /> 4.0 GROUND WATER INFORMATION . . . . . . . . . . . . . . . . . . . . . . 5 <br /> :4.1 Ground Water Depth and Gradient .. . . . . . . . . . . . . . . . . . . . . . . . . . 5 <br /> 4.2 Potential Ground Water Contamination Issues . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 <br /> .43 ___ _.Water.Sample Location . .. . . . . . . . . . . . . . . . . . . . . . . 5 <br /> 4.4 Water Sample Constituents . . . . . . . . . . . . - . . . - .. . . 5 <br /> 4.5 Well Water Sample Collection, Handling,and Transportation . ..... . . . . . . . . . . . . 6. <br /> 4.6 Chain of Custody.. . . . . . . . . . . . . . . . . . . . . . . . . . .... . . . . . . . . . . . . . . . . . . . 6 <br /> 5.0 SOIL PROFILE AND GEOLOGIC INFORMATION :. . . . . . . . . . . . . . . . . . . . . 6 <br /> 5.1 - Soil Boring Locations . . . ... . . . . . . . . . ... . . . . . . . . ... . . . . . . . . . . . . . . . . 7 <br /> 5.2 Soil Boring Dimensions -: :. . . : . : : . . " . . . . .- . . . . . ... . . . . . . . . 7 <br /> 5.3 - Soil L-ithology Observed. .. . . . . . . . . . . . . . .... . . . . . . . . . . . . . . . . . . . . . .. . . . . . - . - . . . 7 <br /> 5.4 Discussion of Soil Litholo. . ...: . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . . 9 <br /> 6.0 _ PERCOLATION TEST_ INFORMATION : . . . . -. . . . 9 <br /> 6.1 Percolation Test Locations . . . . .. . . . . . ... . . . . . . . . . . . . . . . . . . . . . . ... . . . . . . . . . 9 <br /> = 6.2 Number of Percolation Tests . . . . ... . . .. . 9 <br /> r 6.3 Boring Preparation-and Presaturation. . . . . . . . . . ... . . . . . . . . . . . <br /> 6.4 Condition of Borings After Presaturation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 <br /> - 6.5 Percolation Test Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ... . . 10 <br /> 6.6 Percolation Test Forms and Results .... . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 <br /> 6.7 Discussion of Percolation Test Results . : . . . . . . . . .. . . . . . . . . . . 11 <br />