Biosparge OMM Monthly Report 202501.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

04 February 2025

Mr. Joseph McCloud NAVFAC Mid-Atlantic

NAVFAC MIDLANT

9324 Virginia Ave Norfolk, VA 23511-3095

RE: Monthly Progress Summary Report – January 2025

Zones 1 and 2 Biosparge System Operations, Maintenance, and Monitoring (OM&M) Naval Submarine Base New London, Groton, CT Contract# N4008523D0073/Task Order# N4008524F6461

Dear Mr. McCloud, KOMAN Government Solutions, LLC/Trinity (KGS/Trinity) is pleased to provide this January 2025 Monthly Progress Summary Report, detailing a summary on the Operations, Maintenance, and Monitoring (OM&M) for the biosparge system located in Zone 1 and 2, Naval Submarine Base New London, Groton, CT:

1. OM&M Activities – January 2025

a. Performed weekly remote checks on system performance.

b. On-site system maintenance round was completed on 03 January 2025.

i. KGS/Trinity tech recorded observations.

1. Observations attached.

c. Overall, the system is running as designed.

d. Several faults caused the system to shutdown for a total of 173 hours of downtime in January. These faults were due to either freezing conditions, and/or over voltage alarms that shut the system down.

As documented in an email correspondence between the Contractor, NAVFAC, and members of the B.29 Power Station (dated 10 January 2025), B.29 had to operate using the emergency diesel generator. The generator yields varying voltages which would explain the overvoltage to the biosparge system.

e. The desired flowrate of 4.0 actual cubic feet per minute (acfm) at BSW-02 to BSW-12 was achieved.

f. The desired flowrate of 3.0 acfm at BSW-13 thru BSW-30 was achieved. The system is still equalizing since being turned on in October 2024.

g. Light non-aqueous phase liquid (LNAPL) gauging occurred on 03 January 2025. LNAPL was detected in monitoring wells 1MW4, 1MW11, and TMW5 at estimated thicknesses of 1.0, 0.1, and 0.7 feet, respectively.

h. LNAPL recovery at 1MW4, 1MW11, and TMW5 was conducted on 03 January 2025. A peristaltic pump was used to recover 0.5, 0.5, and 2.0 gallons of LNAPL, respectively. To date, 71.90-gallons of LNAPL have been removed at the site. A tracking summary sheet is provided as an attachment to this monthly report.

2. Submittals

a. December 2024 Monthly Report - 03 January 2025.

b. Draft Annual Report (2024) – 30 January 2025.

KOMAN Government Solutions, LLC Subsidiary of the Natives of Kodiak

3. Next Month (February 2025) Planned O&MM Activities

c. Next System Maintenance Round is tentatively scheduled for 05 February 2025. This will include:

1. LNAPL gauging and recovery.

d. Address stakeholder comments on Annual Report (2024).

4. Issues and Concerns

e. BSW-01 remains inaccessible due to a partial asphalt patch over the well cover.

f. BSW-02 remains inaccessible due to a partial asphalt patch over the well cover as denoted in the

June Monthly O&M Report. This well is receiving required flowrate.

g. As indicated in the January 2023 Monthly report, 1MW9 had been destroyed by others during an excavation to repair a main water line. Recommend installing a replacement well as this well serves to monitor concentrations just before they enter the Thames River.

Distribution:

L. Bidder, NSBNL EV P. Schauble, KGS/Trinity

Attachments:

Recorded O&M Observations 03 January 2025 LNAPL Gauging and Recovery Summary Table Weekly System Log January 2025

Please feel free to reach out with any additional questions/concerns.

Sincerely, KOMAN Government Solutions, LLC/Trinity

Russ McCormick, P.G. (NH, FL) Project Manager

(978) 460-9603 - mobile

LNAPL Gauging and Recovery Summary (2021-2024)

Zones 1 and 2, Naval Submarine Base New London Groton, Connecticut

Well ID Well Diameter Date LNAPL Thickness

(feet) Estimated LNAPL Well Volume

(gallon) LNAPL Volume Removed

(gallon) Removal Method

6/8/2021 0.87 0.1392 0.50 Bailer 7/8/2021 0.05 0.008 0.50 Bailer 8/5/2021 0.02 0.0032 0.25 Bailer

9/9/2021 ND N/A N/A N/A

10/7/2021 NM N/A N/A N/A

11/18/2021 NM N/A N/A N/A

12/16/2021 NM N/A N/A N/A

1/6/2022 NM N/A N/A N/A

2/15/2022 NM N/A N/A N/A

3/10/2022 0.1 0.016 0.25 Bailer

4/20/2022 NM N/A N/A N/A

5/10/2022 NM N/A N/A N/A

6/13/2022 ND N/A N/A N/A

7/8/2022 NM N/A N/A N/A

8/15/2022 0.07 0.0112 1.00 N/A 9/16/2022 0.05 0.008 1.5 Bailer 10/7/2022 0.2 0.032 1.5 Bailer

11/23/2022 NM N/A N/A N/A

12/8/2022 0.7 0.112 0.25 Bailer

1/11/2023 ND N/A N/A N/A

2/15/2023 ND N/A N/A N/A

3/16/2023 ND N/A N/A N/A

4/12/2023 ND N/A N/A N/A

5/9/2023 ND N/A N/A N/A

6/2/2023 ND N/A N/A N/A

7/5/2023 0.1 0.016 0.50 Bailer

8/10/2023 0.1 0.016 0.50 Bailer

9/6/2023 ND N/A N/A N/A

10/12/2023 ND N/A N/A N/A

2-inch1MW4

Summary (2021-2025)

Zones 1 and 2, Naval Submarine Base New London Groton, Connecticut

Well ID Well Diameter Date LNAPL Thickness

(feet) Estimated LNAPL Well Volume

(gallon) LNAPL Volume Removed

(gallon) Removal Method

11/20/2023 ND N/A N/A N/A

12/7/2023 ND N/A N/A N/A

1/11/2024 ND N/A N/A N/A

2/8/2024 ND N/A N/A N/A

3/19/2024 ND N/A N/A N/A

4/11/2024 ND N/A N/A N/A

5/16/2024 ND N/A N/A N/A

11/15/2024 ND N/A N/A N/A

12/3/2024 0.1 0.016 0.50 Peristaltic 1/5/2025 1 0.16 0.50 Peristaltic

1.25 4.50 1.00 1.00 7.75

11/23/2022 0 0 0.5 Bailer

1/11/2023 ND N/A N/A N/A

2/15/2023 ND N/A N/A N/A

3/16/2023 NM N/A N/A N/A

4/12/2023 NM N/A N/A N/A

5/9/2023 NM N/A N/A N/A

6/2/2023 ND N/A N/A N/A

7/5/2023 ND N/A N/A N/A

8/10/2023 ND N/A N/A N/A

9/6/2023 ND N/A N/A N/A

10/12/2023 ND N/A N/A N/A

11/20/2023 ND N/A N/A N/A

12/7/2023 ND N/A N/A N/A

1/11/2024 ND N/A N/A N/A

2/8/2024 ND N/A N/A N/A

3/19/2024 ND N/A N/A N/A

4/11/2024 ND N/A N/A N/A

2-inch1MW10

1MW4 Removed Total CY2022

1MW4 Removed Total CY2024 1MW4 Removed Total CY2023

1MW4 Removed Total CY2021

1MW4 Removed Subtotal

2-inch1MW4

Zones 1 and 2, Naval Submarine Base New London Groton, Connecticut

Well ID Well Diameter Date LNAPL Thickness

(feet) Estimated LNAPL Well Volume

(gallon) LNAPL Volume Removed

(gallon) Removal Method

5/16/2024 ND N/A N/A N/A

11/15/2024 ND N/A N/A N/A

12/3/2024 ND N/A N/A N/A

1/3/2025 ND N/A N/A N/A

0.50 0.00 0.00 0.50

6/8/2021 ND N/A N/A N/A

7/8/2021 ND N/A N/A N/A

8/5/2021 ND N/A N/A N/A

9/9/2021 ND N/A N/A N/A

10/7/2021 0.16 0.0256 1.25 Bailer 11/18/2021 0.56 0.0896 1.5 Bailer 12/16/2021 0.15 0.024 1 Bailer

1/6/2022 ND N/A N/A N/A

2/15/2022 0.02 0.0032 1.25 Bailer 3/10/2022 0.5 0.08 0.5 Bailer 4/20/2022 0.1 0.016 0.5 Bailer 5/10/2022 Only on probe N/A 0.25 Bailer 6/13/2022 0.01 0.0016 0.25 Bailer

7/8/2022 ND N/A N/A N/A

8/15/2022 ND N/A N/A N/A

9/16/2022 0.21 0.0336 2 Bailer 10/7/2022 1.04 0.1664 1 Bailer

11/23/2022 0 0 0.5 Bailer 12/8/2022 0.03 0.0048 0.25 Bailer 1/11/2023 2.15 0.344 2 Bailer

2/15/2023 ND N/A N/A N/A

3/16/2023 ND N/A N/A N/A

4/12/2023 ND N/A N/A N/A

2-inch1MW10

2-inch1MW11

1MW10 Removed Total CY2024 1MW10 Removed Subtotal

1MW10 Removed Total CY2022 1MW10 Removed Total CY2023

Zones 1 and 2, Naval Submarine Base New London Groton, Connecticut

Well ID Well Diameter Date LNAPL Thickness

(feet) Estimated LNAPL Well Volume

(gallon) LNAPL Volume Removed

(gallon) Removal Method

5/9/2023 ND N/A N/A N/A

6/2/2023 ND N/A N/A N/A

7/5/2023 ND N/A N/A N/A

8/10/2023 ND N/A N/A N/A

9/6/2023 0.9 0.144 1 Bailer

10/12/2023 0.2 0.032 1 Bailer 11/20/2023 0.5 0.08 1 Bailer 12/7/2023 0.3 0.048 0.5 Peristaltic 1/11/2024 0.1 0.016 0.5 Peristaltic

2/8/2024 ND N/A N/A N/A

3/19/2024 ND N/A N/A N/A

4/11/2024 0.5 0.08 0.5 Peristaltic 5/16/2024 0.2 0.032 0.5 Peristaltic

11/15/2024 0.01 0.0016 0.15 Peristaltic 12/3/2024 0.1 0.016 0.5 Peristaltic 1/3/2025 0.1 0.016 0.5 Peristaltic

3.75 6.50 5.50 2.65

18.40 6/8/2021 0.9 0.0369 0.5 Bailer 7/8/2021 1.09 0.04469 0.75 Bailer 8/5/2021 1.48 0.06068 0.75 Bailer 9/9/2021 1.34 0.05494 2 Bailer

10/7/2021 0.71 0.02911 0.75 Bailer 11/18/2021 2.09 0.08569 0.5 Bailer 12/16/2021 1.5 0.0615 1.5 Bailer

1/6/2022 1.39 0.05699 1.5 Bailer 2/15/2022 0.04 0.00164 0.25 Bailer 3/10/2022 0.67 0.02747 1.25 Bailer

TMW5

1MW11 Removed Subtotal

1-inch

1MW11 Removed Total CY2023 1MW11 Removed Total CY2024

1MW11 Removed Total CY2021 1MW11 Removed Total CY2022

2-inch1MW11

Zones 1 and 2, Naval Submarine Base New London Groton, Connecticut

Well ID Well Diameter Date LNAPL Thickness

(feet) Estimated LNAPL Well Volume

(gallon) LNAPL Volume Removed

(gallon) Removal Method

4/20/2022 3.00 0.123 1.5 Bailer 5/10/2022 1.85 0.07585 0.75 Bailer 6/13/2022 0.9 0.0369 0.75 Bailer 7/8/2022 0.48 0.01968 1.25 Bailer

8/15/2022 0.52 0.02132 1.5 Bailer

9/16/2022 NM N/A N/A N/A

10/7/2022 2.7 0.1107 1 Bailer

11/23/2022 NM N/A N/A N/A

12/8/2022 2.85 0.11685 1.5 Bailer 1/11/2023 4.1 0.1681 0.25 Bailer

2/15/2023 NM N/A N/A N/A

3/16/2023 6 0.246 2.0 Peristaltic 4/12/2023 3.8 0.1558 1.5 Bailer/Peristaltic 5/16/2023 NM N/A 1.0 Bailer 6/2/2023 3.7 0.1517 1.5 Bailer 7/5/2023 2 0.082 1.5 Bailer

8/10/2023 1 0.041 1.5 Bailer 9/6/2023 3.8 0.1558 1.0 Bailer

10/12/2023 2.1 0.0861 1.5 Bailer 11/2/2023 2.4 0.0984 N/A* N/A 12/7/2023 2.4 0.0984 1.5 Peristaltic 1/11/2024 5 0.205 2.0 Peristaltic 2/28/2024 9.3 0.3813 2.0 Peristaltic 3/19/2024 7 0.287 2.0 Peristaltic 4/11/2024 4 0.164 1.5 Peristaltic 5/16/2024 4 0.164 1.5 Peristaltic

11/15/2024 0.3 0.0123 1.0 Peristaltic 12/3/2024 3.7 0.1517 2.0 Peristaltic 1/3/2025 0.7 0.0287 2.0 Peristaltic

6.75 11.25

1-inchTMW5

TMW5 Removed Total CY2021 TMW5 Removed Total CY2022

Zones 1 and 2, Naval Submarine Base New London Groton, Connecticut

Well ID Well Diameter Date LNAPL Thickness

(feet) Estimated LNAPL Well Volume

(gallon) LNAPL Volume Removed

(gallon) Removal Method

13.25 14.00 45.25

11.75 22.75 19.75 17.65 71.90

Notes:

* LNAPL recovery did not occur. See monthly report.

LNAPL denotes light non-aqueous phase liquid.

N/A denotes not applicable.

ND dentoes LNAPL was not detected.

NM denotes not measured due in access issues with well.

Only wells with historical LNAPL are shown on the table. Wells that are not shown have not had LNAPL detected.

Cumulative Removed Total CY2021

Cumulative Total Removed

TMW5 Removed Subtotal

TMW5 Removed Total CY2023

Cumulative Removed Total CY2024

TMW5 Removed Total CY2024

Cumulative Removed Total CY2022 Cumulative Removed Total CY2023

NSBNL Biosparge Weekly System Check

Date Time Operator

HE-101

ON/OFF

HE-201

ON/OFF

BL-101

ON/OFF

BL-101

VFD (Hz)

BL-201

ON/OFF

BL-201

VFD (Hz)

FIT-101

(scfm)

FIT-201

(scfm)

FIT-101

Total Flow

(cuFT)

FIT-201

Total Flow

(cuFT)

Alarms / Faults Active

Combined Injection Rate (scfm)

Total Combined Flow Volume (FIT-101 + FIT-

201) (cuFT)

Weekly Injection Flow Vol (cuFT)

1/2/2025 830 MS OFF ON OFF 0 ON 51 21 36 135902017 153950923 57 289,852,940 302,465 1/9/2025 1300 MS OFF OFF OFF 0 OFF 0 0 0 136193449 154325619 0 290,519,068 666,128

1/10/2025 845 MS ON ON ON 51 ON 51 50 60 136193840 154326077 110 290,519,917 849

1/14/2025 915 MS ON ON ON 51 ON 51 52 60 136203592 154339289 112 290,542,881 22,964 1/16/2025 1045 MS ON ON ON 51 ON 51 54 54 136344161 154511314 108 290,855,475 312,594 1/24/2025 800 MS ON ON ON 51 ON 51 52 59 136893510 155140152 111 292,033,662 1,178,187 1/30/2025 800 MS OFF OFF OFF 0 OFF 0 0 0 137216024 155510046 0 292,726,070 692,408

MS - Michael Spaulding BrA - Brett Anchukaitis

Date Time Description Corrective Action Taken Down Time units 1/2/2025 830 BL‐101 Fault active, system running at reduced rate 1/2/2025 1200 BL‐201 VFD Fault active, System off 1/3/2025 0600 system restart, power issue 18 1/7/2025 445 BL‐101 and BL‐201 VFD Faults active system offline, possible power issues 1/7/25 1030 system restarted, VFDs both over voltage faults, power surge? 5.75 hrs 1/7/2025 2215 BL 101 and BL‐201 VFD Faults active, over voltage 1/10/25 0830 system restart, Bot VFDs had over voltage faults, B‐29 power work in plant 58.25 hrs 1/10/2025 1415 BL 101 and BL‐201 VFD Faults active, over voltage 1/14/25 0915 system restart, faults caused by power delivery issues 91 hrs 1/29/2025 1230 BL 101 and BL‐201 VFD Faults active, possible freezing conditions 2/4/25 1045 system restart, both VFDs Over Voltage fault