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xX o-....,^�S _ 1,:y ?-ry �y,,,.;>-t1 F��'d!�kf �.��✓rq-t,,i-;r'M+"}' S.��m �'-.r yr'ro�..�1 -vi:.��.r' fy�k s� '§`--.,��rrr r 3��' i !�, �� _. _� .� <br /> "�� r' - *. -;t s�:. ee,� '.•f'-`.r�^ �� ;,,: { rF !'1 ;-. r .'.}SFr..S�. ' n, � � �;e 3 r p.�,,"._ �,r�. ,y�v '�,� �,�{ ¢�'�x,' t C �'ti 7'. t �y,, <br /> - <br /> ,�rt"w. <br /> f <br /> Work Plan <br /> ARCO Service Station No, 2130, Stockton, California May 17, 1991 <br /> t t AGS 3003-IW <br /> initiated by the held geologist and will accompany the soil samples to the laboratory, <br /> example of the Chain of Custody Record is also included in A An <br /> borings are terminated, the borings will be backfilled with a slurry cente�iben er c <br /> and water, tonite, <br /> _ nst"Iction a a r-vx&actio__`n Welds <br /> LVe will Observe the driller construct three 4-inch-diameter vapor-extractio <br /> borings north of the station buildin _ n wells in the <br /> inch-diameter schedule PVC <br /> S The wells will be constructed of thread j .f <br /> ointed, - <br /> used in well Construction_ casing_ No chemical cements, glues, or <br /> solvents will be <br /> The screened portion of the wells will consist of factory- <br /> perforated casing wita20-inch-A�sjotTire interval between 10 and <br /> grade will be screened using slotted casings. Na. 3 sand will be Laced in t feel <br /> below <br /> space opposite the screen to a � . 3 sand p he annular <br /> pproxirnately 1 foot above the top of the slotted casing. A <br /> 2-fOot bentonite plug will be placed above the sand <br /> will be used to fill the remaining annulus is the sur pack, and a cenfent-bentonite slurry <br /> well design is included in Appendix C. face, A schematic vapor-recovery <br /> A tr�lftc-rated cast-alurninnrrr utility box with a PVC apra,-r µ,i11 be placed over each <br /> wellhead and set in concrete flush with the surrounding concrete ad. h <br /> watertight seal to protect against surface water infiltration and is opened vrith a box has a <br /> wrench. `The design of the box discourages vandalism and reduces the possib,l�sofccal <br /> accidental disturbance of the well. <br /> �1wp/ied �eo� �tein� <br />