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Drilling Log <br /> ❑❑® GROUNDWATER Monitoring Well OB-3 <br /> ❑❑❑ TECHNOLOGY <br /> Project Manna Pro Owner Manna Pro Corporation <br /> Location Stockton, Cakfornia Prol No 020702819 <br /> Description <br /> Q- N T CL D. 0 U Q p U <br /> :rE a Q e a m �� rn (Calor, Texture, Structure) <br /> o m Trace < 10%, Little 10% to 20%. Some 20% to 35%, And 35% to 50% <br /> U m ?! <br /> 24 <br /> 15 5w (grades 00YR4/6) <br /> 26 30 Fine SAND, grayish brown 00YR5/2), poorly graded (dense, <br /> 0133-26 30 rounded to subrounded, damp, slight petroleum odor) <br /> (grades olive brown (2 5Y4/3)) <br /> 28 10 <br /> OB3-2820 <br /> 30 <br /> SP <br /> 30 10 (grades grayish brown (2 5Y5/2)) <br /> 20 <br /> 083-31 35 <br /> 32 <br /> 15 (grades gray (2 5Y5/1)) <br /> 20 CLAY, dark gray (2 5Y4/1) (hard, damp moderate petroleum odor) <br /> 34 4133-33 5 <br /> 35 <br /> e (grades trace calcium carbonate, very stiff) <br /> 10 CL <br /> 36 083-36 30 <br /> 5SILT very dark gray (5Y3/1) (stiff, damp, moderate petroleum <br /> 38 s odor) <br /> OB3-385 ML <br /> 10 <br /> 40 _ a Fine SAND, very dark gray (5Y3/1), poorly graded (medium dense, <br /> t0 rounded to subrounded, wet, moderate petroleum odor) <br /> 15 Encountered water 9/21193 <br /> 42 — <br /> 12 SP (grades rounded, slight petroleum odor) <br /> 083-43 12 <br /> 44 8 <br /> — 5 SAND, fine to medium, very dark gray (5Y3/1), moderate grading <br /> 12 (medium dense, rounded to subrounded, saturated, moderate <br /> 46 20 petroleum odor) <br /> 48 sw <br /> 50 End of boring Constructed monitoring point <br /> 52 - <br /> -54 - <br /> 56 56 <br /> 12/22/19931dthlog—mar93 Page 2 of 2 <br />