WORK PLANS - Laserfiche WebLink

Home Browse Search

- a `19 December_2003 ,- AGE-NC Project No 95 l - - Page_10.of 12 14. Y - proposed location will allow neighbarmg:properties to'conduct their dayyto day`buslness without Y - _ _ interference from the-operation oF,tlie.:SVE unit:' r-' _ T - .tom• �,..r- "- - '-! r -_ -:a` i '. r _ 3--- LAr 4.2:1.. Soil VaporExtractlori-WellInstallatlon E F - - � . ..:i - • .. - r installation ofan additional three SVE-Wells is proposed utllizmg a`truck mounted drill rig equipped with 8-inch diameter hollow-stem augers:Hollow stem augers�will-be cleaned prior to advancement � in-each borehole. The SVE wells will be advanced to:-depths of approximately 40,feet bsg..The.SVE wells.will be completed with-y2-inch,dian eter' schedulC40_ PVC well casing eir�placed through the hollow stem-augers.Each_SVE well will utilize fifteen feet of slotted well-casing(0:020-inciz�`screen �K N size)-from 20 to 40'feet bsg. -A #3 Lonestar:Lapis-Luster�sand,will be poured.down the annulus - between the well casing and the inner wall ofahe hollow stem-auger:The-filter pack.wilI be:placed- _ adjacent to the screen from'the:bottom of the_boring to a.point approximately 2 feet above_the top= ` of-the screen.'A two foot interval'of bentonite pellets=(annular seal) w.ill:l e.placed.above the filter.:` - .' pack. Portland cement will be utilized to grout from the annular seal to surface grade .A SVE well f x constructionYdiagram'is depicted iri Figure S "` 4.2.2. Soil Vapor_ Extraction•Piping System - f A network of two'-inch diameter;schedule 40 PVC piping will bb-in stalled-idG inch wide by 12-lnch _ deep trenches at the site.The PVC•piping will be iouted_froin,each SVE well headto avapor dropout v " . drum;the vapor drdpout druniwill be=directly connected'to the SVE.unit.A'PVC ball valve_wil'l be installed at'each SVE-well Bead so that vapors can be.drawn from each wll independently A plan f of the proposed piping system and enclosed SVE unit location ale depicted iii-Figure 3. fa The..locationof:the'SVE un'I is proposed ne r*the northeast corner at the site (Figure 3).--This '. proposed-location of the SVE unit;well allow neighboring properties totcoriduct their day'to day business without lnterfere'nce:from the operation ofthe:'SVE`unit The SVE unit wlll'be secured by'-.=._. r achain-linked,gated enclosure within uretnerits 1 S-feet wide by,.10-feet long and six feet i_r Height: Soil Vapor-Extractlori Monitoring Acti-v1 les ;.. 3 During'the initial"start-up Zpehod"for.the SVE system'(approxlmately oneWeek),the-SVE unit will 5 = be.monitored'daily using a Dwyer DSt200 flow sensor.di d a photo-ionization detectgr:(PID). The, Dwyer-DS-20.0 flow sensor:wilimonitotbperatlonal parairieters(airflow,combustion temperature,� volume ofprocessed vapor,oxygen level-and the]ower ekplbsive limits)to ensure optilnal-destr'&ion.-- 4dvanc_ed_GeaEnvironmental,Inc.7. _ -^Y� - G- '' -`3 _, ` [. k ,i 2.jF � Fes:. ' _ -- -A � 9• { _ r ', - -y- 5 Y ? `� * �`'s, r .'e _- - -,.'3T - '<` _'_ .' Y.' •rr _ erre -;.. _ Y