PPI LOG 02 NLON SITE 11.pdf

Page Section Para.

1 3 WE#2

Please provide a copy of the Final 2024 Annual Report of Long-Term Operation, Maintenance & Monitoring of Biosparge System at Zones 1 & 2.

Previously provided with Amendment 0003.

2 3 WE#2

Please provide a copy of the 2025 Monthly Progress Summary Reports (January – May 2025).

Provided with this Amendment 0003

3 3 WE#1 Please provide a copy of the Sampling and Analysis Plan (APTIM, 2018) Previously provided with Amendment 0003.

4 3 WE#2 Please provide an inventory of spare parts maintained at the site. A spare parts inventory list is not available.

5 3 WE#2

Please confirm if the OxyGuard Polaris meter will remain at the site for use by the O&M contractor.

Confirmed.

6 3 WE#2

Please provide a list of system alarms received during the last 6 months of operation

Refer to monthly reports provided in PPI #2 response.

7 3 WE#2

Please confirm the required response time to address system alarms – can system alarms be addressed during the next routine O&M visit?

Alarms should be reset as soon as possible in order to minimize system downtime.

8 4 WE#3

Please confirm if monitoring wells have dedicatred pumps and/or tubing, or if the contractor is responsible to supply that equipment and materials for the annual sampling event

Monitoring wells do not have dedicated pumps or tubing. The contractor is responsible for supplying the necessary equipment and materials.

9 3 WE#2

Please confirm the start date for biosparge monthly O&M and the month in which the annual groundwater sampling event is conducted.

The next monthly biosparge O&M site visit should be performed either the first or second week of October. The annual sampling event should occur in October.

10 4 WE#3

Please confirm if disposal of LNAPL collected during monthly recovery events is part of this SOW.

Confirmed. All waste (IDW and LNAPL) management and disposal is the responsibility of the contractor. LNAPL collected during monthly recovery events needs to be drummed, labeled, and transported to the Hazardous Waste Management Facility (Building 562 or other approved location) for storage while waste characterization/profiling is performed. Transportation and offsite disposal at a licensed TSDF is also required.

11 4 WE#3

Please Confirm laboratory analysis and lab methods for the annual groundwater sampling event.

See SAP

12 4 WE#3

Please confirm if Geochemical parameters collected during annual groundwater sampling event are limited to field YSI readings (DO, ORP, pH, Conductivity and turbidity) or if additional laboratory parameters are also included.

Confirmed. Field parameters monitored during the annual sampling event should be Temp, pH, SPC, DO, ORP, Turbidity.

13 4 WE#3

Please confirm how IDW is currently being pre-treated for PFAS prior to disposal. IDW profile provided with Amendment 0002.

14 4 WE#3 Please provide most recent IDW laboratory report. Refer to annual report provided in Amendment 0003

GOVERNMENT RESPONSEQUESTION GOV'T RESPONDER

NAME, E-MAIL

REFERENCE

Date

SubmittedPPI No.

15 8/27/2025 3 WE#1

The SOW states that the contractor shall review the 2019 Operations Monitoring and Maintenance Manual, Zones 1 and 2 Biosparge System, Non-CERCLA Soil and Groundwater (OM&M Manual) (APTIM, 2018) and the Sampling and Analysis Plan (SAP), and update as needed during the course of operations. Can the Government confirm if the contracfor should include pricing to prepare updated O&M manaual and SAP as part of this scope of work. Per the SOW, updates to these plans are required as needed.

Amend No.