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-s y 1 Y -..--!<Y.�_a�. - _ ..�-•',P' _ _ � Y Y - - ..+ �-.. F y �, ". -.Cs TrE } :3w - '---, - , ar 05.July.2007 AGE-NC ProjectNo 03-1100 .. — s — of 9- At 15OZONE SPARGE-POINT CONSTRUCTION - N Following!advancement of=the soil borings, _one manufacturer-assembled -2-inch by: - - micro parous sparge point and casing will be installed-in each bo ing The sparge points will.-N,!._ W - installed.at depths of approximately 62 feet bsgY_Al a cPVC riser will connect thespargepoi�nts -rte to a surface ozone_ generator.--,A ptoposed o:i6i4.spargevpoint construction:diagram is=depicted m = 3 Figure 3 - a i ._ y , � S L 7. 77 4. After installing the well casingtach boring,a filter pack m'atenal will be slowly emplaced through the augers over the micro diffuser interval to approximately two;feet above the macro diffuser '; intervals for the,;i�r otut well The filter_pack rrtater aLin,the ozone sparge wells will'consist'of, t pre-was ed#2112 Zones a ar is Additional filter pack_material: rill be added af-settling.occuB A y- nominal=3- oo entori to seal(bentonite pellets)will be:placed above the filter pack to minimize the potential for grout penetration into the*screened;section-of the well sThea bentonite seal wail be formed.K66uring bentonite chips and::allowing_the pellets to.seitle on the°fi°lter .. pack:The bentonite-pellets will be allowed to hydrate-Wit tap water fol a minimum of one: al f Finur prior to_gxoutmg- k r s _ - q; The,remaining annular space will be filled-to the ground,surface with a cement.grout The grout r mixture will-consist of Type I/II portland neat cement--and:.not more-than:6.gallons of water:.per -- 94.-pound'sack of ceinerit"The grout will be-placed by pumping through trernmie`pipe�A grouting 1. s 4inspect. n-.will be scheduled-"with EH_D personnel: -b 3.6. CP_T"SOLI; BORING � ' :z { Each CPT soil-boring will be advanced 16-a depth.of i00 feet bsg utilinga 2"S 46fi truck moueted 4_ Y- CPT-drill.rig equipped with a.hydrauhc ram and 2=inch diam_ eter hollow-stem rods to'advance soil 3 borings The initial soihborrig will be-a- `penetronneter, advanced�to;the desired°depth. Soil parameters such as cone bearing,_sleeve friction; friction ratio arid:pore water pressure will . _ ; measured as the cone penetrometer is'advdnced Rinseategenerated as part-of the drilling activities � will:;be containerized-in properly'labeled:DOT approved. 55-gallon Brims-and stored on-site-iii an •.' y area lacking public access Disposal alternativ sewill be.eualuated at a.later date based on`.laboratory s results of rinseate sarriples. . Y K _ u fir: 7 'A second soil boring-r-ill be locatedno more than three feet from the first,CPT boring-for sot' 'and r ground_water-sample collection Based-on CPT.�fmdings,discrete-.soil samples-will be collected at s, m .� - -- 4-66 «-.. :-'. r y �,_ various depths between'30-and 100'feet b -'b ased on slg-m icant litliologic`variation,Soil samples z will be collected utilizing a 2=inch diameter'piston soil sampling assembly166ded with-pre cleaned. � brass sleeves.Upon soil sample retrieval,a_brass sleeve wail be=removed from the sampler.The'ends `- 4 - , r . � . Advancedi3eoE&Ironmental,Inc eL 41 77 ff T 7.