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_V3 � M 'M"M <br /> 079 <br /> LOG OF EXPLORATOCJ' BORInG <br /> Page 1 of 2 <br /> 1 PROJECT NUMBER 438-22.01 ARCO BORING NO. E-1 <br /> BY BH DATE 5/24/84 2908 Benjamin Holt Drive - <br /> Stockton. California SURFACE ELEV. <br /> CLASSIFICA110N OATA FIELD DATA ' 2 <br /> Plait;• n <br /> %Finn Liquid ci siv tion r i E DESCRIPTION <br /> (-No.2001 Limit Index ST.rj1h (Bloivi/ <br /> (TSF) Ft.) a t7 <br /> 2--inches Aspha t an -inc es <br /> Baserock <br /> Black (5Y 2.5/2) slightly clayey <br /> sand FILL <br /> (CL)Black (2.5Y N2/0) sandy silty <br /> CLAY has faint product odor <br /> dry <br /> (dark olive gray (5Y 3/2) fine <br /> 16 5 sandy has faint product odor <br /> and rare coarse sand - damp) <br /> r ` <br /> (mottled dark gray (2.5Y N4/0) <br /> 15 1D and olive brown (2.5Y 4/4) silty <br /> has strong product odor and <br /> -- trace of roots - damp <br /> _. (SC)Olive gray (5Y 4/2) clayey fine <br /> 12 15 SAND contains thin silty clay <br /> V, interbeds and moist <br /> (thin sand interbeds) <br /> CL 01 brawn (2.5Y 4/4) silty <br /> CLAY - moist <br /> 41 20 (SP)Olive brown (2.5Y 4/4) slightly <br /> clayey SAND - wet <br /> REMARKS: Boring was converted to a ground-water monitoring well by <br /> backfilling from 24 feet to 23 feet with bentonite and by installing <br /> ! 1 <br /> 21 feet of 3-inch PVC casing, The lower 15 feet of casing was slotted an <br /> the annular space was backfilled with pea gravel from 23 feet to 5. feet. <br /> A bentunit -concr2te seal wa placed from 5 eet teo 1 foot. The well was...o�on <br /> w�ti a pro ective vau t box and a loc 1n evTck <br />