MAIN PLANT AREA GROUND WATER - AISB PILOT … · 2020-01-21 · SDMS DocID 2105020 Malvern TCE Site...

SDMS DocID 2105020

Malvern TCE Site

Main Plant Area Ground Water

AISB Pilot Update / Discussion

April 11, 2008

mmm OBRIENEGERE ^ ^ ^ ^ = www.obg.com

AR305240

http://www.obg.com

Discussion Overview

> Accelerated In Situ Biodegradation (AISB) Pilot Test Update

> Presentation of Key Data

> AISB Technology Conclusions

> Path Forward

mmm o DROEN G GERIE File Location/creator initials/Business Unit/client/month & year/file riame.ppt

AR305241

AISB Pilot Test Status

> Continue to provide electron donor (lactate), and additional nutrients (P, Vitamin B12) as-needed, via injection at source well GW-7

> MAL-1 Culture bioaugmentation: October 2006 at GW-7 and GW-8 (no bioaugmentation since)

> GW-1 ground water used for injection water since March 2007; provides some limited "recirculation" of treatment area groundwater from downgradient to source area/injection point

> Currently bi-monthly monitoring of pilot test wells is conducted

> Pilot data continuously evaluated to optimize treatment within pilot area and within constraints of the currently limited infrastructure

mmm QDRIIEN G GERE File Location/creator initials/Business Unit/clienVmonlh & year/file name.ppt

AR305242

AISB Key Data Summary

> Complete AISB data set and graphs are provided in separate attachment

> Following slides present key data / observations that demonstrate the successful / complete dechlorination of the source VOCs

> Figure 1 shows TCE ground water plume (Jan. 2007 data) and new delineation wells (installation in process)

> Figures 2 and 3 show the AISB pilot treatment area and : • spatial relationship of pilot wells

• ground water flow direction in treatment zone

• molar concentrations over time for chlorinated ethenes and ethanes

mmm o BRDEN G GERE File Location/creator initials/Business Unit/client/month & year/file name.ppt

AR305243

TCE in Ground Water / New Wells

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a

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SITE TOPOGRWHIC CONTOURS SHOWN ARE PRE-CAP CONSTRUCTION

nCURE 1

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LESEUQ

SITE BOUNDARir

FENCE

. C C - 1 4 MONITDRINQ WELL

m

(INSTAIXED PRIOR TO PRE-OESKN INVESnCATION)

MONITORING WELL

PHASE 2 MONITORING WEIL - s u F , - OR WELL PAIR (A/B) ^ ^ ~ 1 2 I OCATION

TCE IN GROUND WATER ISOCONCEKnUnON ^ ^ ISDCONCENTRATiaN

^ t g r CONTOUR (FT/MSy ' ^ (JANUARY 2007) (DASHED

WHERE INFERRED)

24000

TCE CONCENTRATION IN GROUND WATER (JANUKRT 2 0 0 7 ) / ( M g / 0

CHEMCLENE SITE DEFENSE GROUP

MALVERN TCE SUPERFUND S[TE

EAST WHITELAND TWP.. PENNSYLVANIA

TCE IN GROUND WATER ISOCONCENTRATION

CONTOUR MAP (OANUART 2007)

FILE NO. 37558.004-41

MARCH 2008

2Q0S c OBrittn £ Qar. Enaki.ars. Inc.

AR305244

NOTE: SITE TOPOGRAPHIC CONTOURS SHOWN ARE PRE-CAP CONSTRUCTION

FIGURE 1

LEGEND

SITE BOUNDARY

FENCE

.CC-14 MONITORING WELL "T^ (INSTALLED PRIOR TO

PRE-DESIGN INVESTIGATION)

MONITORING WELL

PHASE 2 MONITORING WELL rÂ, i n OR WELL PAIR (A/B) b W - l z : LOCATION

TCE IN GROUND WATER ISOCONCENTRATION CONTOUR (FT/MSL) (JANUARY 2007) (DASHED WHERE INFERRED)

TCE CONCENTRATION IN GROUND WATER (JANUARY 2007)/Ojg/L)

26000

CHEMCLENE SrrE DEFENSE GROUP

MALVERN TCE SUPERFUND SfTE

EAST WHfFELAND TWP., PENNSYLVANIA

TCE IN GROUND WATER ISOCONCENTRATION

CONTOUR MAP (JANUARY 2007)

100

RLE NO. 37558.004-41 APRIL 2008

2(X]8 © O'Brien & Geie Encineers. inc.

AR305245

Slt« Nam*:

SDMS US EPA Region 111 Imagery Insert Form

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SofiM ImagM In this docunMnt may be ill«9ibl« or unavailabi* In SOMS. P f « u « s«« r«aMn<i) Indkatod below:

ILLEGIBLE diM to bad sourca documents. Ifnages(s) in SOMS equivalent to hard copy.

Specify Type of t3ocumfint(8) / Conwnents:

D Includes COLOR or RESOLUTION vaflations. Unless ottieiwise noted, these pages are availatiie in monochrome. The source document page(s) is more legibie than the images. The anginal document is available for vie%Mng at the Supisrftjnd Records Center.

Specify Type of Dacum«nt(s) / Comments:

a RESTRICTED CONFIOENTIAL BUSINESS INFORMATION (CB»-R): Restflcted or copyrighted documents that cannot be imaged.

d Specify Type of (3oainiant(s) / Comments:

i UNSCANNABLE MATERIAL: A Oversized or FormaL Due to certain scanning equipment capability limitations, the

document page<s) is not available in SOMS. The original document is available for vie*- <rr> at the EPA Region 3 SuperfUnd Records Center.

Specify Type of Oocument(t) / CommanlK

rô^.rVs a ^ i > rg

El Document is available at the EPA Region 3 Superfund Records Center.

Spedfy Type at Oocumant(s) / Commsnts:

AR305246

AISB Pilot Data

•4f

•v-

• - ENDOF MEL INJECTION

- pH INJECTION (START/FINSH)

' - LACTATE INJ./BIOAUG. GW-1 PCE and Breakdown Products vs. Time

Sep-05 Nov-05 Jan-06 Mar-06 May-OS Jul-06 Aug-06 Oct-06 Dec-06 Feb-07 Apr-07 Jun-07 Aug-07 Oct-07 Dec-07 Feb-08 Apr-08

-*—PCE ^ ^ T C E —0—cis-1,2-DCE —»—Vinyl Chloride —•—Bhene

File Location/creator initials/Business Unit/client/month & year/tile name.ppt u !>*< J luiii .11. lIMlJil'ii m . -".J l i j im W •mWIMJWWIPI.—Wmwa^WU U'^M^HI^JI I IH. U ' H ' H ' J ^.'l

mmm OBniEN & GERE

AR305247

AISB Pilot Data

-4

END OF MEL INJECTION pH INJECTION (START/FINSH) LACTATE INJ./BIOAUG.

GW-8 PCE and Breakdown Products vs. Time

Sep-05 Nov-05 Jan-06 Mar-06 May-06 Jul-06 Aug-06 Oc1-06 Dec-06 Feb-07 Apr-07 Jun-07 Aug-07 Oct-07 Dec-07 Feb-08 Apr-08

—*—PCE — ^ T C E —o—cis-1,2-DCE —•—Vinyl Chloride —•—Bhene

^^ÔBn iENSGERE File Location/creator Initials/Business Unit/client/month & year/file name.ppt

AR305248

AISB Pilot Data

-4

END OF MEL INJECTION

pH INJECTION (START/FINSH)

LACTATE INJ7BI0AUG. GW-7, CC-6, GW-8 and GW-1 Vinyl Chloride vs. Time

(September 2005 - February 2008) 15

10

OI

E

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Sep-05 Nov^S Jan-06 Mar-06 May-06 Jul-06 Aug-06 Oct-06 Dec-06 Feb-07 Apr-07 Jun-07 Aug-07 Oct-07 Dec-07 Feb-08 Apr-08

—»—GW-7 —.— CC-e _<i_GW-8 _ ^ G W - 1

mmm o BRIEN G GERE File Location/creator initials/Business Unit/client/month & year/file name.ppt

AR305249

AISB Pilot Data END OF MEL INJECTION pH INJECTION (START/FINSH) LACTATE INJ./BIO AUG.

15

10

"a c o

o o O o >

GW-7, CC-6, GW-8 and GW-1 Vinyl Chloride vs. Time (Apr i l 2003 - February 2008)

PPI(2001) Results

GW-1 0.003 ppm GW-7 not installed

• H — ' 1

1 II l a

i i n J

iW Jan-03 Jul-03 Jan-04 Jul-04 Jan-05 Jul-05 Jan-06 Jul-06 Jan-07 Jul-07 Jan-08 Jul-08

—o GW-7 _ ,_CC-6 —u—GW-8 — _ G W - 1

.iiiiinwimiufwiniv

^ ^ ^ O B R I E N G G E R E File Location/creator initials/Business Unit/client/month & year/file name.ppt

AR305250

AISB Pilot Data • ENDOF MEL INJECTION


LACTATE INjyBIO AUG.

E, ^ c o 1

o c o u O 2 O >

GW-7, CC-6, GW-8 and GW-1 Ethene vs. Time

1 11 1 1 1 M i l 1 1 1 1 1 1 I I I 1

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! ,.,.„W^ : ^—^ „ii Sep-05 Nov05 Jan-06 Mar-06 May-06 Jul-06 Aug-06 Oct-06 Dec-06 Feb-07 Apr-07 Jun-07 Aug-07 Oct-07 Dec-07 Feb-08 Apr-08

|i..-.S —9—GW-7 —•—CC-6 —t—-GW-8 GW-1

File Location/creator initials/Business Unit/client/month & year/file name.ppt

O BRIEN G GERE

AR305251

AISB Pilot Data

-'i:

END OF MEL INJECTION


LACTATE INJ./BIO AUG. 1 , , , , . v . . i ... ..... , i -OR INJECTION WATER GW-7, CC-6, GW-8 and GW-1 Chloroethane vs. Time

Sep-05 Nov-05 Jan-06 Mar-06 May-06 Jul-06 Aug-06 Oct-06 Dec-06 Feb-07 Apr-07 Jun-07 Aug-07 Oct-07 Dec-07 Feb-08 Apr-08

—•—GW-7 —•—CC-6 —<i—GW-8 — — G W - 1

File Location/creator initials/Business Unit/client/month & year/file name.ppt ..-+jL,i..iawr.sBMW.f?^flB.Û J.IJ .ij.^^'m^-''.p*..îmi%

^ ^ ^ O B R I E N G G E R E

AR305252

AISB Pilot Data ew-7 MOLAR

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CC-6 MOLAR

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0 BRIEN G GERE

AR305253

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AISB Pilot Data

GW-7 ETHENES

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gggOBRIENGGERE

AR305254

AISB Pilot Data

GW-7 ETHANES

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a BRIEN G GERE

AR305255

AISB Pilot Data

GW-1 ETHENES

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File Location/creator initials/Business Unit/client/montti & year/file name.ppt > ^ mmm o BRIEN G GERE

AR305256

AISB Pilot Data

GW-1 ETHANES

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F-'ile Location/creator initials/Business Unit/client/montti & year/file name.ppt -iWWllUmLI]Jll!WUW>M»IIPWWWWBW-'>"lJft.'W^Ha»B->J|l.'.IW>^yL'W'lWlJlWIJ|iWIWlUimmi*^*W'.'l''l''lliMWi'|IWHU

m m m o BRIEN G GERE

AR305257

Pilot Test Results Summary

Accelerated In Situ Bioremediation

> Electron donor distributed continuously & effectively in treatment area of CC-6 to GW-1 (minimum) via GW-7 injection

> Achieved, accelerated complete TCE degradation to ethene in treatment area

> Achieved, accelerated complete 1,1,1-TCA degradation to chloroethane in treatment area

^ g g O B R I E N G G E R E

File Location/creator initials/Business Unit/client/month & year/file name.ppt AR305258

MPA Ground Water - Design Status

> October 6, 2005 letter presented Conceptual Design of an AISB biorecirculation system as the MPA ground water remedy and comparison to the ROD remedy.

> November 2, 2005 EPA response: the EPA willing to consider changing the ground

water remedy to incorporate AISB, conditioned upon the collection of additional

information on MPA ground water conditions, CSM data gaps, and further

evaluation of AISB performance.

> March 2006 AISB Pilot Test Report Addendum completed in response to letter

> USEPA also requested that a work plan for MPA ground water investigation, in lieu of the Preliminary Design, to:

= further define the VOC source area in bedrock ground water

= further define the VOC plume configuration downgradient of the source

area

• further characterize bedrock ground water flow conditions in the MPA area and VOC plume

• assess the potential vapor intrusion pathway

mmm OBRDEN G GERE File Location/creator initials/Business Unit/client/month & year/file name.ppt

AR305259

AISB Conceptual Design Overview

> Pumping to control and facilitate distribution of donor / nutrients for source treatment through AISB > In situ biological treatment to permanently destroy VOCs throughout the

source zone. > Ground water extracted would be amended with nutrients and re

injected in the source area within the capture zone creating a closed loop treatment cell.

> Ground water to be bioaugmented with BCI's TCE/TCA degrading culture initially and as necessary

> MNA to address downgradient VOC plume

mmm o BRIEN G GERE File Location/creator initials/Business Unit/client/month & year/file name.ppt

AR305260

ROD Comparison

> Consistent with the 1997 ROD objectives > Retains pumping > Retains ground water re-injection

> Retains MNA > Modifies the treatment technology

mmm OBRIEN G GERE File Location/creator initials/Business Unit/client/month & year/file name.ppt

AR305261

ROD Comparison

> Section X.C.1 of the ROD indicates that "Extraction well(s) shall be designed to remediate thie dissolved contaminant plume to MCLs listed in C.2 below. The exact nurnber and location of the extraction well(s) shall be determined during remedial design phase. The degree to which natural attenuation can be incorporated into the pump and treat system will be determined during remedial design. A portion of the extraction system shall be positioned to collect potential DNAPLs in the area of existing monitoring wells CC-S and CC-7."

> The number and location of extraction wells for a biorecirculation treatment system would be consistent with above

> Both systems would incorporate MNA to remediate the dissolved phase constituents in the downgradient plume area.

> The recirculation approach will be designed to target the in situ destruction (rather than collection) of residual sources or potential DNAPLs throughout the treatment zone, including the area proximal to CC-6 and CC-7.

> The flushing and destruction of DNAPL due to injection and accelerated bioremediation, and the increased dissolution of any residual DNAPL as dissolved mass is destroyed would accelerate DNAPL remediation more effectively than collection from extraction alone.

^ ^ = Q B R I E N G G E R E


ROD Comparison

> The selected remedy for the MPA Groundwater requires the "extraction and treatment of ground water via air stripping followed by carbon adsorption or UV oxidation and subsequent re-injection of treated ground water to the aquifer to restore the Site ground water to beneficial use".

> The biorecirculation treatment system would include the extraction, treatment and the re-injection of treated groundwater.

> Extracted groundwater would be amended with nutrients and reinjected to promote continued in-situ treatment throughout the treatment zone.

> Ground water treatment (i.e., reductive dechlorination) would occur in situ without transfer of VOCs to the atmosphere or other media.

> With time, the quality of groundwater extracted and reinjected will continue to improve as it is treated in situ and eventually restored.

mmm OBRIENGGERE File Location/creator initials/Business Unit/client/month & year/file name.ppt

AR305263

ROD Comparison

> "A pilot study shall be conducted to determine the appropriate treatment method.... "The design, construction and operation of the treatment system shall consider and reduce the possible visual and noise impacts to the surrounding residences".

> The Pilot Test data demonstrate that bioremediation is an appropriate treatment method and can treat the VOCs to their respective MCLs.

> The proposed biorecirculation approach will also eliminate the visual and noise impact associated with conventional aboveground treatment components.

g ^ g OBRIENGGERE


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MAIN PLANT AREA GROUND WATER - AISB PILOT … · 2020-01-21 · SDMS DocID 2105020 Malvern TCE Site...

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