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Cambria Environmental Technology, Inc BORINGIWELL LOG <br /> 8620 Holly Drive, Suite 200 <br /> Everett,WA 98208 <br /> Telephone 425 353 6628 <br /> Fax 425 3536443 <br /> CLIENT NAME Chevron Environmental Management BORINGIWELL NAME B-7 <br /> JOB/SITE NAME 9-1848 DRILLING STARTED 25-Jan-06 <br /> LOCATION 1257 West Yosemite Ave Manteca CA DRILLING COMPLETED 25-Jan-06 <br /> PROJECT NUMBER 61H-2043 WELL DEVELOPMENT DATE(YIELD) NA <br /> DRILLER Greg <br /> Drilling and Testing, Inc GROUND SURFACE ELEVATION Not Surveyed <br /> DRILLING METHOD Hydraulic push TOP OF CASING ELEVATION Not Surve ed <br /> BORING DIAMETER 2" SCREENED INTERVAL NA <br /> LOGGED BY R Ratilainen DEPTH TO WATER(First Encountered) 16 5 ft 25-Jan-Dfi <br /> REVIEWED BY M Miller PG#6008 DEPTH TO WATER(Static) NA 1 <br /> REMARKS Cleared to 8fbq wth hand auger <br /> U <br /> E 0 HW w CL U a 00 LITHOLOGIC DESCRIPTION WELL DIAGRAM <br /> d mp ~X p in �J Oa <br /> EL U W 0 UW <br /> O <br /> As halt 0 3 <br /> -Tan, medium to coarse-grained sand (-5 fbg to 8 fbg) <br /> SAND with silt Tan brown moist 90%fine to <br /> coarse-grained sand, 10%silt, nonplastic high estimated <br /> permeability <br /> 0 B-7@5 5 Dark brown, moist,fine-grained sand (-8 fbg to 12 fbg) <br /> -Light tan dry medium-grained sand (-12 fbg to 16 fbg) <br /> -Tan brown,wet very coarse-grained sand (--16 to 18 5 <br /> fbg) <br /> S <br /> 10 M <br /> 0 B-7@12' <br /> 15- <br /> 0 B-7@16' cZ <br /> 185 <br /> SILT with sand Olive tan moist,50%silt,40%clay, <br /> ML 10%sand high plasticity,moderate estimated 200 Portland Type <br /> 0 B-7@20' 20---- -,permeabiUty_------------------�_ <br /> B-7@2 0' = No Rocove� hydropunch interval kAl <br /> 13 215 <br /> (water) _- - --- - - -------SAND with silt Brown,wet 90%medium to very <br /> o coarse-grained sand 10%silt, nonplastic high estimated <br /> permeability <br /> r <br /> a 0 B-7@2 4 SAND with silt Brown,wet 90%medium to very <br /> LL <br /> Y5 SM coarse-grained sand, 10%silt, nonplastic high estimated <br /> permeability <br /> m <br /> a <br /> 0 B-7@2 8' <br /> F ----------- 290 <br /> �? B-7@30' _ - -NoRecove hydropunch interval- -- --- 300 <br /> (water) - 30--- -SM- l -Silty SANd Olive green grey,wet 55%fine-grained 31 0 <br /> l sand,35%silt, 10%clay, low plasticity,moderate to high <br /> �`eshmated _ meabil!ly---------------7 <br /> SAND with silt Green grey wet,90%medium to very <br /> coarse-grained sand, 10%silt, nonplastic high estimated <br /> permeability <br /> a <br /> 1 <br /> 35 SP <br /> Continued Next Page PAGE i of 2 <br />