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�. ' <br /> 4, - � -F-_.- •' -- ,_ Vii. ,F x- - - ._ _ � - P� � _ V - - ? . <br /> 1.4 Novemher 1995 r _ ::f _ <br /> - AGE-NC Project No`,95-0185' -p <br /> r: <br /> ` . Page 3 of , <br /> t . <br /> { 4.1. -COLLECTION OF SOIL AND GROUND WATER <br /> For the collection of soil and yraund_water'samples, the following procedures will be performed `f i <br /> f <br /> -1. Notify the PHS-EHD 48 hours prior-to commencement of any work: <br /> 2. - -install four probings,-using a:yan-mounted-Geoprobe-equipped with a 1.125 inch diarueter <br /> probe rods, to depths of approximately 20,feet:,Probing locations are illustrated on Figure 2 <br /> 3. Decontaminate sampling equipment in an Alconox solution and-rtnse'twice with water prior <br /> -to sampling run. i <br /> 4:' Obtain discrete s6i1'samples°at.'five-foot intervals starting'at 10 feet, using Geoprobe soy! F - <br /> sampler assembly loaded.wifh-pre-cleaned 1'125-inch by_6-inch brass sleeves - , <br /> 5._. -.Preserve soil in the second.brass sleeve b coverin both ends wifh:Teflon sheets, capping,. - <br /> and sealing with tapir.-Label and'log samples on'a-chain-of-custody form. = <br /> 6. More the samples.under ice and•transpart the ,samples m a-chilled container to a State <br /> cfied ertia <br /> 1 boratory for analysis �. <br /> _ 7. Screen soil sample r3uplicates for-the-presence of volatile organics using to-ionization..i <br /> W _ detector (PID)_p calibrated"to isobutylene <br /> F' <br /> ` .8. Log borings..in accordance with the Unified Soil Classification System <br /> = 9. '-rCollect two groundwater samples.'We anticipate collecting one=grab ground..water,sample • f'. <br /> �- "'omhprobigthin.tieomer-U5-Txava0on, a.secod grabground•wer.sample.-wlfr T 1 <br /> be_collected from-a probing.locdt�.south`,o lfhi)''river UST excavation...The samples will <br /> be'collected in-1,-liter amber containers and 40-mI,-EFA approved,,VOA-vials, using a .;v <br /> Geoprobe wateraampling assembly.-? <br /> ny- _ • : :-.. ;� X` .� , <br /> r 10:. Backfill each' 2"Ung using a concrete bentonite slurry in the-entrre depth of the probing <br /> 41 <br /> . N.:'-, - �•. ° 3+4 y �"'-.4 Jw .�i'S - i.s>si.. -'« f}3 - �t.. 3 <br /> 11 Selected soil sarnples.and the w_ ater samplesYwill be,-ftf ed for total petroleum hyclrocarbbns <br /> quantified as diesel(TPA as diesel)-and volatile aromatics (benzene, toluene,:&&benzene. F} <br /> ._ and total xylenes:.BTE&X)in accordance with the appropriate EPA methods.,. <br /> 4:2. INSTALLATION OF GROUND WATER IVIONITORI:NG WELLS ! 7. <br /> - If hydrocarbon-impacted ground water is encountered during the investigation, the PHS-EHD,will <br /> require theinstallatiori ofat.leastthree ground water monitoring wells. T,he`following procedures wi113".,` kF_ <br /> be performed for the installation of monitoring:wells <br /> . - __ - � • .v "' � .- 1. - - • .:L_ <br /> L Notify the PHS-EH.D 483 hours prior to conimencement of any work; while securing proper _ <br /> ` - n go <br /> citylcunty'soil.15 Op .permits <br />. � - .. , . <br /> r <br />