KGS_2018d_Area_of_Contamination_50_2018_Injection_Program_Summary_Devens.pdf

KOMAN Government Solutions, LLC Phone (508) 366-7442 293 Boston Post Road West, Suite 100 Fax (508) 366-7445 Marlborough, Massachusetts 01752 www.komangs.com

June 11, 2018

U.S. Army Corps of Engineers New England District 696 Virginia Road Concord, MA 01742-2571 Attn: Ms. Penelope Reddy

Subject: Area of Contamination (AOC) 50, 2018 Injection Program Summary Former Fort Devens Army Installation, Devens, MA Contract No. W912WJ-18-C-0011

Dear Ms. Reddy, On behalf of the U.S. Army Corps of Engineers (USACE) New England District and the U.S. Army BRAC Environmental Office Fort Devens, this letter provides a summary of the planned 2018 enhanced reductive dechlorination (ERD) injection program. The injection program is planned to be conducted during summer 2018. As such, agency review is requested within 60 days per the AOC 50 Long-Term Monitoring and Maintenance Plan (KGS, October 2017), or sooner if possible.

The 2018 injection program consists of an organic carbon substrate injected into selected existing injection wells and direct injections of an organic carbon substrate containing zero valent iron into the subsurface via direct push technology. The program includes injecting substrate into up to 10 existing injection wells and conducting direct injections in up to 30 locations. Approximately 29,680 gallons of organic substrate will be injected into the subsurface in order to promote ERD of the chlorinated volatile organic compound (CVOC) plume in groundwater.

Direct injections will be conducted in AOC 50 Area 1 at the Former Drum Storage Area by monitoring well G6M-07-02X, in Area 1 near the parachute building (T3803) around well G6M-13-05X, in Area 3 upgradient of well G6M-04-02X, and west of Area 5 upgradient of well G6M-97-05B. Injections will also be conducted at existing injection wells in Area 3, Area 4 (to treat the solvent mass in Area 4 detected at G6M-02-13X), and Area 5 (to treat the solvent mass upgradient of G6M-13-04X).

The planned locations, specific substrate, approximate gallons, and planned depths are listed in Table 1.

The injection wells and approximate area of the planned direct injections are shown on Figure 1, which also shows Fall 2017 PCE concentrations and contours. The actual injections may differ from the plan based on field conditions. A summary of the injection program will be provided in the AOC 50 2018 Annual Report.

Please contact me at (508) 219-6771 or jropp@komangs.com if you have any questions.

Sincerely, KOMAN Government Solutions, LLC

James Ropp, P.E.

Project Manager

KOMAN Government Solutions, LLC Subsidiary of the Natives of Kodiak

Attachment: Table 1 AOC 50 2018 Injection Program

Figure 1 Injection Locations & Tetrachloroethene Concentration in Groundwater – October 2017, AOC 50 cc: Robert Simeone, BRAC Devens, MA Dan Groher, USACE Mike Kulbersh, USACE Carol Keating, EPA Region 1

Laurie O'Connor, EPA Region 1 David Chaffin, MassDEP Ron Ostrowski, MassDevelopment Sgt. Brian Lee, Mass. State Police

Laurie Nehring, PACE Julie Corenzwit, PACE Richard Doherty, Engineering and Consulting Resources, Inc.

KGS File

Table 1 AOC 50 2018 ERD Injection Program

Former Fort Devens Army Installation, Devens, MA

Location Location AOC 50 Injection Product Pounds of Percent Injection Injection Type Area (and water) Product Weight Volume (gal) Depth (ft bgs)*

IW-27 Injection Well Area 3 ABC+Ole' 450 70 - 90 IW-26 Injection Well Area 3 ABC+Ole' 450 70 - 90 IW-25 Injection Well Area 3 ABC+Ole' 450 70 - 90 IW-29 Injection Well Area 4 ABC+Ole' 450 105 - 125 IW-30 Injection Well Area 4 ABC+Ole' 450 105 - 125 IW-31 Injection Well Area 4 ABC+Ole' 450 100 - 120 IW-32 Injection Well Area 4 ABC+Ole' 450 95 - 115 IW-6 Injection Well Area 5 ABC+Ole' 450 115 - 135

IW-39 Injection Well Area 5 ABC+Ole' 450 125 - 145 G6M-02-05X Injection Well Area 5 ABC+Ole' 450 120 - 135

GP-58 DPT Injection ABC+Ole'+Fe 860 18 - 46 GP-59 DPT Injection ABC+Ole'+Fe 860 18 - 46 GP-60 DPT Injection ABC+Ole'+Fe 860 18 - 46 GP-61 DPT Injection ABC+Ole'+Fe 860 18 - 46 GP-62 DPT Injection ABC+Ole'+Fe 860 18 - 46 GP-63 DPT Injection ABC+Ole'+Fe 860 40 - 64 GP-64 DPT Injection ABC+Ole'+Fe 860 40 - 64 GP-65 DPT Injection ABC+Ole'+Fe 860 40 - 64 GP-66 DPT Injection ABC+Ole'+Fe 860 40 - 64 GP-67 DPT Injection ABC+Ole'+Fe 860 40 - 64 GP-68 DPT Injection ABC+Ole'+Fe 860 40 - 64 GP-69 DPT Injection ABC+Ole'+Fe 860 40 - 64 GP-70 DPT Injection ABC+Ole'+Fe 860 40 - 64 GP-71 DPT Injection ABC+Ole'+Fe 860 40 - 64 GP-72 DPT Injection ABC+Ole'+Fe 860 40 - 64 GP-73 DPT Injection ABC+Ole'+Fe 860 40 - 64 GP-74 DPT Injection ABC+Ole'+Fe 980 75 - 95 GP-75 DPT Injection ABC+Ole'+Fe 980 75 - 95 GP-76 DPT Injection ABC+Ole'+Fe 980 75 - 95 GP-77 DPT Injection ABC+Ole'+Fe 980 75 - 95 GP-78 DPT Injection ABC+Ole'+Fe 750 114 - 134 GP-79 DPT Injection ABC+Ole'+Fe 750 114 - 134 GP-80 DPT Injection ABC+Ole'+Fe 750 114 - 134 GP-81 DPT Injection ABC+Ole'+Fe 750 114 - 134 GP-82 DPT Injection ABC+Ole'+Fe 750 114 - 134 GP-83 DPT Injection ABC+Ole'+Fe 750 114 - 134 GP-84 DPT Injection ABC+Ole'+Fe 750 114 - 134 GP-85 DPT Injection ABC+Ole'+Fe 750 114 - 134 GP-86 DPT Injection ABC+Ole'+Fe 750 114 - 134 GP-87 DPT Injection ABC+Ole'+Fe 750 114 - 134

Notes:

DPT = direct push technology ERD = enhanced reductive dechlorination ft bgs = feet below ground surface gal = gallon

* Injection depths for injection wells refer to the screened intervals.

Numbering of GP-## locations are continued from the previous (2017) injection program.

11,000 15

Existing Injection Well Network

Proposed 2018 DPT Injection Locations

Area 1 - G6M-13-05X

FDSA

Area 1 -

G6M-07-02X

Area 5 - G6M-97-05B

Area 3 - G6M-04-02X

20,250 15

8,100 20

3,000 20

4,000 20

3,000 20

!@!P

")E

")E

")E

")E

#0 #0

#0

Nashua River

IWS Syste m Enc losure

Build ing

Build ing 3818

Build ing 3822

Build ing 3820

T 3807

T 3823

Fitc hburg Road /Route 2A

Form e r N orth Post

Me rrim ac k Ware hous e , Inc .

Rubb Air Door

G6M-13-03X

MW-3

G6M-02-01X

G6M-03-07X

X SA-12-98X X SA-12-97X

X SA-12-96X

X SA-12-95X

G6M-04-14X

G6M-02-06X

G6M-04-07X

G6M-04-06X

G6M-02-07X

G6M-03-08X

G6M-04-05X G6M-03-09X

G6M-03-10X G6M-02-12X

G6M-02-11X

G6M-97-05B

MW-7

G6M-02-13X G6M-02-04X

G6M-04-04X

G6M-04-02X

G6M-04-03X

G6M-04-01X

IW-6

IW-1

IW-2

IW-3

IW-4

IW-5

IW-33

IW-32

IW-31

IW-30IW-29

IW-34

G6M-05-02X /IW-35

IW-36

G6M-06-01X

G6M-02-05X

G6M-13-01X

G6M-13-04X

IW-39

G6M-13-02X

G6M-02-03X G6M-97-28X

IW-24

IW-25 IW-26

IW-27

IW-28

G6M-07-01X

IW-23

IW-22IW-21

IW-20IW-37

(ND)

(ND)

(ND)

(ND)

(5.0) (8.0)

(26)

(36) (1.0)

(ND)

(38)

(1.8)

(4.2)

(ND)

(ND)

(ND)

(ND) (ND)

(140)

(ND)

(3.3)

(ND)

(ND)

(97)

(ND)

(ND)

(10)

(40)

(65)

(ND)

Area 5 DPT Injection Area

Area 3 DPT Injection Area

Le g e nd !> ERD LTM We ll - Sam ple d Se m i-Annually !> ERD LTM We ll - Sam ple d Annually #0 ERD LTM We ll - Sam ple d Bie nnially !( Monitoring We ll Conve rte d to Inje c tion We ll ")E Mic roWe ll - Sam ple d Annually !( Inje c tion We ll !@ Inje c tion We ll Ins talle d 01/2014 !P Dry We ll !@ Floor Drain

Inte rpre tive Te trac hloroe the ne (PCE) Contour (μg /L)

280 Te trac hloroe the ne (PCE) Conc e ntration (μg /L) DPT Inje c tion Are a ERD Inje c tion We ll Trans e c t Form e r Fort De ve ns Bound ary

Figure 1 Injections Locations and Tetrachloroethene

Concentration in Groundwater, October 2017, AOC 50

2018 ERD Inje c tion Plan

AOC 50

Form e r Fort De ve ns Arm y Installation De ve ns , Mas s ac hus e tts

293 Boston Pos t Road We s t, Suite 100, Marlboroug h, MA 01752

Fig ure

Date :

05/24/2018

0 300150

Fe e tµ

!P

#0

#0

#0

Form e r N orth Pos t

Fire Pond

T 3803

T 3840

T 3840

IW-13D

G6M-04-09X G6M-04-10A

G6M-02-08X

G6M-96-22B

G6M-04-22X G6M-04-31X

G6M-04-11X

G6M-04-15X

G6M-04-13X G6M-07-02X

G6M-94-18X /IW-38

IW-11

IW-8

IW-7

IW-17D

IW-17S

IW-18D

IW-19D

IW-19S

IW-18S

IW-12

IW-16D

IW-16S

IW-15S

IW-15D

IW-13S IW-14S

IW-14S

G6M-03-01X

G6M-03-02X

G6M-04-10X

G6M-95-19X

G6M-96-22A

G6M-13-05X

G6M-13-06X G6M-93-13X

G6M-95-20X G6M-04-12X

G6M-96-13B (910)

(ND)

(ND)

(1.2)(ND)

(ND)

(ND)

(ND)

(1.3)

(1.9)

(280)

(ND)

(ND)

Area 1 DPT Injection Area

Area 1 DPT Injection Area

0 10050

Fe e t

Ae rial Sourc e s : Es ri, Dig italGlobe , Ge oEye , i-cube d, USDA FSA, USGS, AEX , Ge tm apping , Ae rog rid , IGN , IGP, swis s topo, and the GIS Us e r Com m unity

Area 1 Inset

See Area 1 Inset

N ote s:

1.Fe ature locations provid e d by HGL

2. μg /L = Mic rog ram s pe r lite r

3. ERD = Enhanc e d Re duc tive De c hlorination

4. GW = Groundwate r

5. J = Estim ate

6. LTM = Long -Te rm Monitoring

7. N D = N on-d e te c t KOMAN Government Solutions, LLC

File : ERD2018_AOC50_IN J_LOC_PCE_102017.m xd