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1 <br /> ' ADDITIONAL WORK PROPOSED UNDER THIS SECOND ADDENDUM: <br /> In carder to determine the lateral limits of the minor FamoLtnTs of <br /> contamination remaining an thu so3 1 , it is proposed to hand-ac.ccrer <br /> ' an additional 7 borings to the wuut , south , and southeast of the <br /> site of the removed UST. DeatLAals cr-f the prupo,ed wort, aro given <br /> below: <br /> ' 1 ) Borings will be: made using a ! 1/4" conventional hand-auger <br /> which will be properly Cleaned beetwu n burings. If it I's not <br /> ' possible to advance the borings an that rnanner , 2" OD solid stem <br /> f 11 ghts, powered by a rotary hafn(ner- , will be used. The <br /> approrxmate locations of tho auger Holes is indicated on E„hxbxt <br /> "U" , attached. Actcaal l.erLatlons may be varied s,laghtly duct: to <br /> ' possible structures or other- impediments. <br /> ^) Sediments pene_t:r<al.ed will be de�scr xbud and logged by the <br /> geologist, and selected �5aunplus; Will be +. cruened with a PIU meter <br /> of necessary. <br /> :) Each boring will be advanced deep csnough to encounter water; a <br /> =,oil samplo will be obtained as cIntsu to the interface as <br /> possible, using a properly prepared brass tube driven into the <br /> bottom of the hole. The tube will bc= properly sealed , Labeled , <br /> ' and refrigerated pending tranafer to the lab for analysis. Each <br /> sample will be tcn5ted for lw+ l£X F, "l F'1 i fa. <br /> ' 4) "Ihc? baringa will be advanced doep enou�Jh to allow collection <br /> of a waiter- sample. The sample will bre obtained -.n thce Followanq <br /> manner: <br /> a) A section of y" FVC ��lottod well screen will be placed an <br /> ' the hole, ve. twrid a ng to th(� bottom. <br /> b) When the hole h.is staba l x:.ed , the static wcater level will <br /> bo measured , and a water sumpl a will be collected by <br /> ' using a disposable plaistxc bailer. <br /> c} The water sump 1 e wall bu placed in properly cleaned y 1 aS�s <br /> vials, sealed , labeled , and preserved pending delivery to <br /> ' tine laboratory. The water camp L cos will be analyzed for <br /> BTEX and TPH--G. <br /> b) Upon completion of the sampling operations, the auger-holes <br /> ' <br /> will be properly f x l lod with c_emcent : spoa L from the borings will <br /> be placed in steel drums, for storage pending the results of the <br /> laboratory anxlycos. Tho properly pru-�kerved seal S, water samples <br /> ' <br /> will be transported to a StKate; Certx f a ed Laboratory under props=r <br /> c jin-of-Lustody for analyzi:- <br />