Load Lines 1, 2, 3, 4 and 12 Project Update - E2S2

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Load Lines 1, 2, 3, 4 and 12 Project Update - E2S2

2011 NDIA E2S2May 12, 2011Multi-Increment Sampling of Subsurface SoilYES IT CAN BE DONE COST EFFECTIVELYJohn P. Jent, P.E.Prudent Technologies, Inc.


Project BackgroundRavenna Army Ammunition Plant, Ravenna, OHTwelve load linesTo be transferred to National Guard BureauDemolition of buildings, environmental cleanupDemolition of buildings, excluding floors, fdtnsEnvironmental cleanup outside of buildingsDemolition of floor slabs & foundationsEnvironmental cleanup below floorsNeeded characterization of contamination insoils from 1 – 7 feet below former floor slabs


Multi-Increment (MI) Subsurface SoilCharacterization• In August 2010, Prudent Technologies conductedMI subsurface soil characterization at the “High”priority buildings and the Shell ReceivingBuildings• Prudent utilized the approximate number andlocations of borings performed for the previoussubsurface characterization that used discrete(individual) borings down to a depth of 4 feet thatwere field screened only.


Load Line123Summary of Subsurface Soil MI Sampling at Load Lines 1, 2, 3, & 4Total Estimated Number NumberBuildingNo. Triplicate Geoprobe Primary Triplicate Total NumberType Length (ft) Width ft)No.Geoprobe Geoprobe Depth Horizontal Horizontal Geoprobe VerticalAnalysesHoles Holes (ft) MI Samples MI Samples Footage (ft) MI SamplesCB-3 Shell Receiving Bldg-1 350 50 11 5 3 55 9 Met, Expl, VOCShell Receiving Bldg-2 11 5 3 55 10 Met, Expl, VOCCA-6 Explosives Preparation 40 40 5 10 5 3 6 75 15 Metals, ExplosCA-6A Explosives Preparation 40 40 5 5 3 25 5 Metals, ExplosCB-4 Melt Pour 210 50 16 5 3 80 12 Metals, ExplosCB-4A Melt Pour 210 50 16 5 3 80 14 Metals, ExplosCB-10 Drill & Assembly 300 50 14 5 3 70 11 Metals, ExplosTop/Rock Varies (0.0' - 6.1') per well logs 78 21 440 76DB-3 Shell Receiving Bldg-1 350 50 11 7 3 77 11 Met, Expl, VOCShell Receiving Bldg-2 11 22 7 3 6 231 33 Met, Expl, VOCDA-6 Explosives Preparation 40 40 5 7 3 35 5 Metals, ExplosDA-6A Explosives Preparation 40 40 5 7 3 35 5 Metals, ExplosDB-4 Melt Pour 210 50 16 7 3 112 16 Metals, ExplosDB-4A Melt Pour 210 50 16 7 3 112 16 Metals, ExplosDB-10 Drill & Assembly 300 50 14 7 2 98 14 Metals, ExplosTop/Rock Varies (0.7' - 18.6') per well logs 78 20 700 100EB-3 Shell Receiving Bldg-1 350 50 11 7 3 77 11 Met, Expl, VOCShell Receiving Bldg-2 11 7 3 77 11 Met, Expl, VOCEA-6 Explosives Preparation 40 40 Area RemediatedMetals, ExplosEA-6A Explosives Preparation 40 40 5 7 3 35 5 Metals, ExplosEB-4 Melt Pour 210 48 16 7 3 112 16 Metals, ExplosEB-4A Melt Pour 210 48 16 7 3 112 16 Metals, ExplosEB-10 Drill & Assembly 300 48 14 28 7 3 6 294 42 Metals, ExplosTop/Rock Varies (1.5' - 15.5') per well logs 73 18 707 1014 G-8 Melt Pour 171 71 12 24 7 3 6 252 36Full Suite241 84 62 24 2099 3131 Bldg per load linegets SVOCs/ PropelPesti/VOCs/ PCBs1 Bldg per load linegets SVOCs/ PropelPesti/VOCs/ PCBs1 Bldg per load linegets SVOCs/ PropelPesti/VOCs/ PCBsTotal Number of Horizontal Samples =Total Number of Vertical Samples =Total Number of Collected Samples =86313399


• Photo 1: Geoprobe Rig and layout of Primary, QC, and QA Boring Locations. Primary locations have yellowpin flags, QC locations have orange pin flags, and QA locations have red pin flags.


• Photo 2: Bringing Geoprobe Tubes from the Geoprobe Rig to theSampling Area


• Photo 3: Portable Canopy Used to Shelter the Field Sampling Area


• Photo 4: Portable Canopy Easy to Disassemble and Transport


• Photo 5: Geoprobe Liner Cutting


• Photo 6: Aluminum Half-Pipes Securing Geoprobe Tube Liner


• Photo 7: Sides of Geoprobe liner tube above Sides of aluminum halfpipe


• Photo 8: Original clays recovered at a few locations


• Photo 9: Clay fill over weathered rock was very typical


• Photo 10: Recent fill over old fill over weathered rock very typical


• Photo 11: Slag just below surface (typical at Load Line 1). Top of theGeoprobe tube on right and bottom on left


• Photo 12: Collecting nominal 5-gram soil plugs from the Geoprobe samples. For horizontalsubsurface VOC MI samples, the Terra Core sampler and large, opened jars are used.


RAVENNA METHANOL COLLECTION OF SAMPLES FOR VOC ANALYSESPOSSIBLE COMBINATIONS OF NUMBER OF 5 g PLUGS IN 2' SAMPLE INTERVALS AND RELATED MASS OF MI SAMPLEProposed HorizontalProposed VerticalNumberVerticalSamplingSamplingNumber of Plugs Mass Sample Number Mass Number MassNumber of Plugs per Horiz of Mass of Plugs of of Plugs ofof Borings per 2' Sample Soil (gm) 1' - 7' per 2' Soil (gm) per 2' Soil (gm)5 6 30 150 905 7 35 175 1055 8 40 200 120 8 200 8 1205 10 50 250 15011 4 44 220 6011 5 55 275 75 5 27511 6 66 330 90 6 9012 4 48 240 6012 5 60 300 75 5 30012 6 72 360 90 6 9014 4 56 280 6014 5 70 350 75 5 35014 6 84 420 90 6 9016 4 64 320 6016 5 80 400 75 5 40016 6 96 480 90 6 901 One goal is to place as close to 50 plugs as possible into a horizontal sample2 For least detection limit, want mass of soil to mass of methanol as close as possible to 1:1 ratio3 For representativeness of the horizontal MI sample, want the same number of plugs from each of the individual borings4 At some locations, rock or other obstructions may prevent getting the full 2' length of recovery- so probably go on least number of plugsto get representativeness5 Additionally, where say there is only 1' of recovery in the 5' - 7' interval, can take 1/2 the number of plugs. But that changes the 1:1 ratio.6 One main criterion that must be insured is that the methanol in the bottle must cover all soil plugs.7 For up to 250 mg soil, can probably use 500 mg bottle8 For over 250 mg bottle, can probably use a 1 liter bottle.9 Headspace (volume above methanol-soil mix) is of minor consequence


• Photo 13: Putting nominal 5-gram soil plugs in bottles with Methanol(horizontal subsurface MI samples)


• Photo 14: Collecting nominal 5-gram soil plugs for a vertical subsurface VOC MIsample. For vertical subsurface VOC MI samples, small jars are used.


• Photo 15:Use of aluminum wedge sampler with hard clays


• Photo 16:Use of aluminum wedge sampler with weathered rock


• Photo 17: Lined 5-gallon buckets used to collect horizontal subsurface MI samples. The three buckets withwhite garbage disposal bags are used for the three depth intervals, 1– 3 feet, 3– 5 feet, and 5– 7 feet.


• Photo 18: Use of Lined Coffee Can to Collect Vertical Subsurface MISamples


• Photo 19: Use of Pre-Populated Sample Labels


Summary & ConclusionsA. Of the total of 411 (81 horizontal and 330 vertical ) planned MI subsurfacesamples, a total of 86 horizontal MI subsurface soil samples and 313vertical MI subsurface soil samples were collected over a period of 13work days.B. The Geoprobe rig successfully collected subsurface materials down to adepth of 7 feet through original clays and fill over weathered rock in mostcases, and generally to depths at least several feet into weathered rock.C. The tools and procedures utilized to prepare MI subsurface soil samplesfrom the Geoprobe liners for both VOC and non-VOC analyses workedwell.D. Triplicate sample results showed relative standard deviations < 25% formetals, which is the Hawaii criterion.E. The horizontal and vertical MI sample results appeared to be consistent.F. The MI subsurface sampling identified an area of PAH contamination notpreviously recognized, but that in hindsight should have been anticipated.


QUESTIONS

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