COLORADO DEPARTMENT OF PUBLIC HEALTH AND ENVIRONMENT

SOLICITATION QUESTIONS AND ANSWERS

Solicitation #: RFP 2026000184 Solicitation Name: Captain Jack Mill Superfund Site O & M

Vendor Question #1: As HDR is piloting and designing the final treatment system, are they currently performing aspects of the O&M scope outlined in this RFP at the Captain Jack site?

CDPHE Answer #1:

Yes HDR is currently performing some of the aspects of the O&M scope, including environmental monitoring, developing the master database, and drafting backlogged and current monthly reports.

Vendor Question #2: Are process/emergency alarm notifications provided remotely?

CDPHE Answer #2:

Process and emergency alarms notifications are not provided remotely to CDPHE. CDPHE expects the contractor to follow the emergency response protocol and notify the CDPHE project manager immediately in the event of an emergency.

Vendor Question #3: What is the specified timeframe the Operator needs to respond to system alarms?

CDPHE Answer #3:

While operators are not expected to be on site 24x7, CDPHE does expect that an operator will promptly respond to system alarms.

Vendor Question #4: Can you please confirm that the external treatment system is run 24 x 7?

CDPHE Answer #4:

Yes. The current active interim water treatment plant operates 24 hours a day 7 days a week.

Vendor Question #5: What is the current staffing level for this operation?

CDPHE Answer #5:

The current staff level for operating the active interim water treatment plant is one operator in responsible charge, an engineer, and one to three technicians. The vendor may propose staffing levels that the vendor thinks are appropriate for the scope of work.

Vendor Question #6: Does the current external treatment system automatically transfer from utility power to back up power (generator) and if so, is an Automatic Transfer Switch part of this setup?

CDPHE Answer #6:

The selected vendor will need to provide a back up generator and an Automatic Transfer Switch.

CDPHE does not own the existing generator or automatic transfer switch.

Vendor Question #7: Is an Automatic Transfer Switch owned by CDPHE?

CDPHE Answer #7:

No. See CDPHE Answer #6.

Vendor Question #8: Please confirm the working sludge pond volume.

CDPHE Answer #8:

The surface remedy as-builts which contain information on the entire surface remedy including the consolidated and capped waste cells, the upper pond, and the lower settling pond are all available and can be accessed via the state's electronic records database here:

https://oitco.hylandcloud.com/CDPHERMPublicAccess/index.html Once you are on the Environmental Records Search Website, under the Search Type Dropdown select CDPHERM HAZ Search by Site Name. Under the CDPHERM Site line type *Captain Jack*.

This will navigate you to all of CDPHE's online records for the Captain Jack Mill Site.

The document handle for the surface remedy as-builts is: 4924552 Both the upper and lower settling ponds will require sludge removal and disposal once the new contract is executed.

Vendor Question #9: Can CDPHE provide any existing plans to the successful bidder as starting documents? For example, this may include Sampling and Analysis Plan and Quality Assurance Project Plan (SAP/QAPP), Standard Operating Procedures (SOPs), Health and Safety Plan (HASP), Operations and Maintenance Plan (OMP), Data Management Plan (DMP), Emergency Action Plan (EAP), and Transition Plan.

CDPHE Answer #9:

The current existing plans are available and can be accessed via the state's electronic records database here: https://oitco.hylandcloud.com/CDPHERMPublicAccess/index.html Once you are on the Environmental Records Search Website, under the Search Type Dropdown select CDPHERM HAZ Search by Site Name. Under the CDPHERM Site line type *Captain Jack*.

This will navigate you to all of CDPHE's online records for the Captain Jack Mill Site. Not all of the documents referenced in question #9 have been created for the site.

Vendor Question #10: Would CDPHE consider alternatives to lime augmentation to effect metals reduction and pH adjustment in the Temporary External Treatment System?

CDPHE Answer #10:

Yes

Vendor Question #11: From our understanding the sludge that is being removed through the temporary treatment system is being commingled back with the treated effluent prior to be sent to the ponds.

What is driving this decision to mix the sludge back with the treated effluent?

CDPHE Answer #11:

This decision is not well documented. The vendor may propose alternatives to this approach.

Vendor Question #12: What is the NPDES permit number for this site and are there presently any outstanding compliance advisories or NOV’s?

CDPHE Answer #12:

Under CERCLA superfund sites are exempted from the requirement to obtain Federal, State or Local permits for activities conducted on-site. Superfund sites are required to meet the substantive requirements of permits. The Captain Jack Mill is a superfund site and is not required to obtain a NPDES permit through the State of Colorado Water Quality Control Division.

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Vendor Question #13: Please provide any influent and effluent water quality analytics that are available. Two years if available

CDPHE Answer #13:

A spreadsheet including available site wide data through August 2025 has been included as an attachment with the RFP documents.

Vendor Question #14: Please provide any sludge waste laboratory analysis that is available.

CDPHE Answer #14:

This information is not available.

Vendor Question #15: Is there any historical data on quantity of sludge removed from site and if so, can you provide two years of historical data?

CDPHE Answer #15:

This information is not available.

Vendor Question #16: What is the volume/tonnage of sludge removed from the ponds on a historical/annual basis?

CDPHE Answer #16:

This information is not available. Please see CDPHE answer to question #8.

Vendor Question #17: What is the depth of the ponds (as built)?

CDPHE Answer #17:

Please see CDPHE answer to question #8.

Vendor Question #18: What structure maintenance has been performed historically? Is the Adit included in this?

CDPHE Answer #18:

Some of this information is available in historic monthly reports, however, some of this information is not well documented. CDPHE anticipates that some structure maintenance will be necessary once the new contract is fully executed. Historic monthly reports are available on the state's electronic records database here: https://oitco.hylandcloud.com/CDPHERMPublicAccess/index.html Once you are on the Environmental Records Search Website, under the Search Type Dropdown select CDPHERM HAZ Search by Site Name. Under the CDPHERM Site line type *Captain Jack*.

This will navigate you to all of CDPHE's online records for the Captain Jack Mill Site.

Vendor Question #19: Where does the property begin as far as road maintenance and snow removal are concerned?

CDPHE Answer #19:

The future contractor will be responsible for road maintenance and snow removal on California Gulch Road from the intersection with Left Hand Canyon Dr to the end of California Gulch Road at the Captain Jack Mill Superfund Site. The future contractor will be responsible for road maintenance and snow removal on the dirt road that accesses the remote dosing system from where the dirt road begins at the intersection with the Peak to Peak Highway to the end of the dirt road at the NiWot 2 borehole and remote dosing system locations.

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Vendor Question #20: Please provide any historical data on snow events requiring road clearing.

CDPHE Answer #20:

This data is not available.

Vendor Question #21: What are the Historical Remedies expectations for Captain Jack Mill?

CDPHE Answer #21:

CDPHE expects the contractor to operate and maintain site infrastructure and all remedial features in a safe, effective and cost-efficient manner.

Vendor Question 22: Have there been any access issues with landowners? What kind of access has been negotiated?

CDPHE Answer #22:

CDPHE maintains access agreements with the current landowners within the Captain Jack Mill Superfund Site. The future vendor will be included in these access agreements.

Vendor Question #23: Please provide the attendees list from the mandatory pre-proposal meeting.

CDPHE Answer #23:

It will be posted with the questions and answers.

Vendor Question #24: Please provide the estimated quantity of sludge in the ponds

CDPHE Answer #24:

Please see CDPHE answer to question #8.

Vendor Question #25: Please provide the quantity of the following chemicals/additives used over the last year:

● Lime

● Methanol

● Are there any others?

CDPHE Answer #25:

The quantity of lime used historically and over the previous year is not available. The remote dosing system has a storage capacity of 4000 gallons, containing 40% methanol. The remote dosing system is refilled generally once to twice annually. Historically, 40% methanol was dosed at approximately 10 gallons per day via the NiWot2 borehole during non-freshet months, and at approximately 20 gallons per day during freshet months. Optimization and alternative dosing amounts are still being tested.

These quantities and dosing rates may not be applicable or representative for the future.

Vendor Question #26: Would the above amounts be representative for estimating quantities for next year?

CDPHE Answer #26:

Please see CDPHE answer to question #25.

Vendor Question #27: Are there any specifications or details about three state-owned tanks near the adit portal (e.g., age, dimensions, cut sheets)? Is there information regarding their current contents?

CDPHE Answer #27:

The specifications requested in this question are not available. Generally the two caustic tanks and the one alcohol tank were purchased around 2020. One of the tanks contains caustic soda, but the other caustic tank and the alcohol tank are empty.

Vendor Question #28: Is the PLC used to run the temporary treatment plant owned by the State?

CDPHE Answer #28:

The PLC in the communications shed is owned by CDPHE. The PLC in the conex box is owned by the current contractor.

Vendor Question #29: For existing equipment not owned by the State (listed below) - Is the current owner open to selling or leasing this equipment, either entirely or partially, and what would the associated costs be?

● Temporary Active Treatment Plant

● Methanol dosing system

CDPHE Answer #29:

CDPHE cannot answer questions directed towards another entity.

Vendor Question #30: Can you delineate where (or at what) the connection points are that begin and end the non-State-owned equipment both mechanically and electrically?

CDPHE Answer #30:

The state owns equipment/infrastructure associated with the surface remedy completed in 2012. The state owns equipment/infrastructure within the adit, communications shed, and boreholes, which was completed as part of the sub-surface remedy in 2018. The state owns equipment/infrastructure that was upgraded or completed as part of the EPA led emergency response between 2018 and 2020. The state also owns the three tanks within the fenced area near the communications shed.

All as-builts for the surface and sub-surface remedies are available on state's electronic records database here: https://oitco.hylandcloud.com/CDPHERMPublicAccess/index.html Once you are on the Environmental Records Search Website, under the Search Type Dropdown select CDPHERM HAZ Search by Site Name. Under the CDPHERM Site line type *Captain Jack*.

This will navigate you to all of CDPHE's online records for the Captain Jack Mill Site.

The state does not own the Interim Water Treatment Plant or equipment within the conex. The state does not own the remote dosing system near the Dew Drop boreholes.

The state does not own the NiWot remote dosing system currently, however the state plans to purchase the NiWot remote dosing system prior to the expiration date of the current contract.

Vendor Question #31: Please delineate the reclamation areas that require maintenance. Does this include maintenance of the vegetation including reseeding if necessary?

CDPHE Answer #31:

The surface remedy as-builts which contain information on the entire surface remedy including the consolidated and capped waste cells, vegetation, run-on control ditches, the upper pond, and the lower settling pond are all available and can be accessed via the state's electronic records database here: https://oitco.hylandcloud.com/CDPHERMPublicAccess/index.html https://urldefense.com/v3/__https:/oitco.hylandcloud.com/CDPHERMPublicAccess/index.html__;!!PUG2raq7KiCZwBk!YPFL8FWrlqUrKPiqvrMRjSgcVFI9bPlT3USDy4ihrFSZwGY-Qthjvzt_6oLpf4qGrHdbOjZG18iXLzeu4i4YEdElsQ$ https://urldefense.com/v3/__https:/oitco.hylandcloud.com/CDPHERMPublicAccess/index.html__;!!PUG2raq7KiCZwBk!YPFL8FWrlqUrKPiqvrMRjSgcVFI9bPlT3USDy4ihrFSZwGY-Qthjvzt_6oLpf4qGrHdbOjZG18iXLzeu4i4YEdElsQ$

Once you are on the Environmental Records Search Website, under the Search Type Dropdown select CDPHERM HAZ Search by Site Name. Under the CDPHERM Site line type *Captain Jack*.

This will navigate you to all of CDPHE's online records for the Captain Jack Mill Site.

The document handle for the surface remedy as-builts is: 4924552 The document handle for the surface remedy O&M Plan is: 4920679 The document handle for information on the Boulder County Noxious Weed Management Plan is:

4920678

Vendor Question #32: Can the roads that require maintenance (and snow plowing) be delineated on a map?

CDPHE Answer #32:

Please see CDPHE answer to question #19.

Vendor Question #33: Please specify the maximum number of days for the installation of a replacement temporary treatment system after the incumbent contractor removes their equipment.

CDPHE Answer 33:

The statement of work has been revised to include clarifying language about the required Start-Up Transition Plan and Close-Out Transition Plan. The Start-Up Transition Plan is due no later than 30 days following the execution of the contract. The current CJM In-Tunnel Treatability Study contract expires August 31, 2026.

Vendor Question #34: In the RFP Section VII Evaluation and Award, C. Evaluation Factors, under item

5. Facility Maintenance and Operation Plan there is an incomplete sentence. "The facility maintenance and operations plan will be evaluated on" (end of sentence). Please provide evaluation factors for this plan.

CDPHE Answer #34: See revised RFP document.

Vendor Question #35: Exhibit D (Discharge Goals) includes semiannual “WET” testing. Is the required test for acute or chronic aquatic toxicity?

CDPHE Answer #35:

CDPHE is currently collecting data for both Acute and Chronic WET testing.

Vendor Question #36: What are the diameters of groundwater monitoring wells?

CDPHE Answer #36:

The diameters of the monitoring wells and mine pool boreholes vary. The March 2024 CJM SAP/QAPP In-Tunnel Treatment and Site Monitoring Revision G contains information on the wells, boreholes, and monitoring locations, and how past environmental monitoring has been conducted. The document handle is 60004615.

The state's electronic records database may be accessed here:

https://oitco.hylandcloud.com/CDPHERMPublicAccess/index.html Once you are on the Environmental Records Search Website, under the Search Type Dropdown select CDPHERM HAZ Search by Site Name. Under the CDPHERM Site line type *Captain Jack*.

This will navigate you to all of CDPHE's online records for the Captain Jack Mill Site.

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Vendor Question #37: How is investigation derived water (groundwater and surface water associated with sampling) managed? Is this water routed back to the source area for subsequent treatment in the water treatment plant or is it managed offsite (if so, what is the approximate annual volume)?

CDPHE Answer #37:

Please see CDPHE answer to question 36.

Vendor Question #38: Please provide any information (for example, software tool, version, other system information) for the master database and indicate whether the existing Captain Jack Mine database will be used for the project? Also, does CDPHE have external tools it requires for field data collection (for example, Survey 123 or others)?

CDPHE Answer #38:

The master database is still under development and is an EQUIS database. The contractor will also be responsible for either providing ongoing electronic data deliverables to EPA for upload to the EPA SCRIBE database, or directly uploading data to the EPA SCRIBE database.

Vendor Question #39: What level/stage of data validation is required?

CDPHE Answer #39:

Level II

Vendor Question #40: Is the Transition Plan for both transition in (mobilization) plan and transition out (closeout) plan, or only closeout?

CDPHE Answer #40:

Please see CDPHE answer to question #33.

Vendor Question #41: Is the stated budget (i.e. “annual budget for this project is approximately $1,800,000.00 per year. The total budget for the five-year period is not expected to exceed $9,000,000”) for this specific scope of work or is the budget for all scopes of work at the site?

CDPHE Answer #41:

This budget is for the scope of work associated with RFP 2026000184, Captain Jack Mill Superfund Site Operations and Maintenance.

Vendor Question #42: RFP Page 4, RFP Section IV. Project Budget, Timeline and Description of Services, B. Project Timeline state the initial contract period is 6/1/2026 to 5/31/2027. However, Attachment 2, Cost/Rate Sheets states the contract period is 5/1/2026 to 4/30/2027. What is the correct initial contract period?

CDPHE Answer #42:

6/1/2026-5/31/2027

Vendor Question #43: RFP Page 10, RFP Section VI. Submittal Requirements, B. Required Documentation, 8. Budget: Should we provide Annual escalation rates? Or provide costs for each contract year?

If we anticipate costs that would occur in one year but not the others (e.g., first year) how should this be captured in our costing?

CDPHE Answer #43:

The cost sheets are intended to be representative estimates of an annual budget.

Vendor Question #44: RFP Page 10, RFP Section VI. Submittal Requirements, B. Required Documentation, 8. Budget: Can we submit the Attachment 2 Cost Sheets in Excel format instead of Word format?

CDPHE Answer #44:

The RFP contains the instructions for how proposals including attachments must be submitted.

Vendor Question #45:

RFP Page 10, RFP Section VI. Submittal Requirements, B. Required Documentation, 5. CERCLA Documents: What type of CERCLA-related documents are you looking for the contractor to show?

CDPHE Answer #45:

The vendor should describe their experience writing and submitting relevant CERCLA-related documents within the proposal. The vendor may provide references to examples of CERCLA related documents they have authored, however it is not necessary for the vendor to submit full example CERCLA documents as an attachment or part of the proposal.

Vendor Question #46: RFP Page 9, RFP Section VI. Submittal Requirements, B. Required Documentation provides a maximum page count for proposals of 50 pages. Please confirm the following items are excluded from page count: Cover Page, Cover Letter, Table of Contents, Confidentiality Statement, and Fly Sheets.

CDPHE Answer #46:

The RFP states that the “maximum page count for proposals is 50 pages and does not include required attachments or resumes.” Required attachments and resumes are excluded from the page count.

Vendor Question #47: Exhibit B. The form agreement in Exhibit B includes an indemnification provision that imposes strict liability on the Contractor. Is the State open to revisions that would establish liability on a comparative negligence basis?

CDPHE Answer #47: The State will make that determination after the solicitation is awarded.

Vendor Question #48: Exhibit B. Is the State open to a mutual waiver of consequential damages in the final contract?

CDPHE Answer #48: See answer 47.

Vendor Question #49: Exhibit B. Does the State anticipate that the PII Certificate and/or HIPAA Business Associate Agreement will be included as part of the final contract?

CDPHE Answer #49:

No

Vendor Question #50: RFP Page 12-13, The text in RFP Section VII. Evaluation and Award, C. Evaluation Factors, 5. Facility Maintenance and Operations Plan is cut off. Please provide the evaluation criteria for this section.

CDPHE Answer #50: See question 4.

Vendor Question #51: Exhibit C Draft Statement of Work Page 1, Primary Activity #1: Can CDPHE provide the CSM to appropriately develop an estimate for the CSM updates?

CDPHE Answer #51:

This is a typographical error. The statement of work has been amended to reflect that the Contractor shall update the Contract Master Schedule (CMS) on a monthly basis or as needed.

Vendor Question #52: Exhibit C Draft Statement of Work Page 3, Primary Activity #2: What level data validation is required?

CDPHE Answer #52:

Level II

Vendor Question #53: Exhibit C Draft Statement of Work Page 3, Primary Activity #2: Can the Master Database be provided so the level of effort for maintaining it can be better understood?

If it cannot be provided at this time, please provide a detailed description of the Master Database for level of effort estimation purposes.

CDPHE Answer #53:

Please see CDPHE answer to question #38.

Vendor Question #55: Exhibit C Draft Statement of Work Page 5, Primary Activity #7: What repairs of the current O&M features are anticipated? Additional specific information will be required to prepare an appropriate cost estimate.

CDPHE Answer #55:

Please see CDPHE answer to question #43.

Vendor Question #56: Exhibit H Page 3, Exhibit H Contract Federal Provisions 4. Contract Provisions Required by Uniform Guidance Appendix II to Part 200, D. David-Bacon Act: Does David Bacon Act apply to this contract?

If yes, please provide the applicable wage determination.

CDPHE Answer #56:

Davis Bacon Wages are not applicable for this RFP.

Vendor Question #57: Can CDPHE please provide the most recent reports for the project, including Monthly Reports from 2024 through March of 2026?

CDPHE Answer #57:

All available recent reports including the available monthly reports can be accessed via the state's electronic records database for the Captain Jack Mill Superfund Site here:

https://oitco.hylandcloud.com/CDPHERMPublicAccess/index.html select CDPHERM HAZ Search by Site Name. Under the CDPHERM Site line type *Captain Jack Mill*. This will navigate you to all of CDPHE's online records for the Captain Jack Mill Site.

Vendor Question #58: Following the link provided in the RFP to access background documents and the instructions on search terms returned no documents. Will CDPHE be providing a new link or uploading documents so that bidders may compete on a level playing field (i.e. have access to the documents which incumbents have? In particular, we request that CDPHE provide any drawings, preliminary design reports and or memos which HDR has produced as a part of their current services contract.

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CDPHE Answer #58:

CDPHE has verified that the link to the state's electronic records database is accurate.

HDR is the current contractor for the remedial design of the external passive treatment system. The remedial design of the external passive treatment system is a separate scope of work and separate contract from the work being advertised under the Captain Jack Mill Superfund Site Operations and Maintenance RFP # 2026000184. The external passive treatment system is still in the pilot phase and design documents have not been developed. Final reports and memos will be uploaded to the state’s electronic records database as they become available.

The state's electronic records database for the Captain Jack Mill Superfund Site here:

https://oitco.hylandcloud.com/CDPHERMPublicAccess/index.html select CDPHERM HAZ Search by Site Name. Under the CDPHERM Site line type *Captain Jack Mill*. This will navigate you to all of CDPHE's online records for the Captain Jack Mill Site.

Vendor Question #59: RFP Part IV.B Project Timeline states contract period of performance (POP) is approximately 6/1/26 through 5/31/27. Attachment 2 Cost Sheet indicates POP of 5/1/2026 through April 30, 2027.

a. Can CDPHE clarify the correct initial year POP for this contract?

b. Shall the offeror only provide costs for the one-year POP and the stated scope line items in the Attachment 2 Cost Sheet?

CDPHE Answer #59:

a. 6/1/26 through 5/31/27

b. Yes

Vendor Question #60: Attachment 2 Cost Sheet line items compared to the SOW primary and sub-activities presents some discrepancies where there are additional scoped activities that may not likely occur within the initial year POP. For example, the passive treatment system installation is assumed unlikely to occur in the initial year.

a. Can CDPHE provide clarification of which primary and sub-activities shall be assumed to occur within the initial year POP?

CDPHE Answer #60:

Please see CDPHE answer to question #43.

Vendor Question #61: Part V.B.4 Mandatory Requirements states, “During those five years, the Offeror shall have operated and maintained at least one facility of similar size and complexity.” Please clarify the definition of “facility” for this mandatory requirement. The CJM in-tunnel treatment system, as a whole, is the only project of its kind in Colorado and perhaps the only project of its kind in the US for a CERCLA-related site.

a. Is this mandatory requirement in reference to a similar ex-situ WTP facility?

b. Similar scope and complexity of the general O&M elements?

c. Similar scope and complexity for an in-situ groundwater treatment system?

CDPHE Answer #61:

CDPHE understands that the Captain Jack Mill Superfund Site has some unique components. CDPHE will consider relevant experience as described in the vendor’s proposal, resumes, and other required attachments in the evaluation of the minimum qualifications requirement.

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Vendor Question #62: RFP Part V.B.4 states as a mandatory requirement, “During those five years, the Offeror shall have operated and maintained at least one facility of similar size and complexity”. Part V.C.2 states for experience and qualifications, “Offeror shall have completed a minimum of two (2) projects of similar size and scope within the past 5 years.”

a. The mandatory requirement versus the experience and qualifications are citing different numbers of projects. Please clarify if this was intentional?

b. The experience and qualifications requirement part indicates ‘project completion’ as the main qualifier while the mandatory requirement part indicates ‘operated and maintained’ as the main qualifier. Will existing projects/contracts that are not technically ‘completed’ qualify? In other words, existing water treatment projects that are ongoing are assumed to be acceptable to meet the experience and qualifications requirement.

c. Are there exceptions to the 5-year minimum requirements for either part?

CDPHE Answer #62:

a. This is a typographical error. The RFP will be modified such that both requirements are consistent. The requirement is: “During those five years, the Offeror shall have operated and maintained at least one facility of similar size and complexity”.

b. Yes

c. No

Vendor Question #63: We have reviewed the In-Tunnel Treatability Study Work Plan Revision, dated May 2024 (Mine Water 2024) and have the following general questions:

a. Is this the most updated description of current site conditions? If not, please clarify what the most up to date work plan, report, or other document is that describes the current site operations.

b. General proposals were stated for installation of additional boreholes near the crosscut borehole #1, targeting the Niwot cross-cut west intersection of Left Hand Creek and Hwy 72. Was this additional work implemented? If so, is there a reference document or can further information be provided on this work?

c. Is the mine pool elevation still generally maintained between 120 and 130 ft?

CDPHE Answer #63:

a. Revision G, dated May 2024 is the most recent version of the In-Tunnel Treatability Study Work

Plan.

b. This information is not available.

c. Yes

Vendor Question #64: Is there an existing operations and maintenance plan for the in-tunnel treatment system?

CDPHE Answer #64:

No

Vendor Question #65: Is the re-circulation system still used or expected to be used in the future?

CDPHE Answer #65:

The recirculation system is not currently in use, however CDPHE wants to maintain the operability of the system.

Vendor Question #66: What is the current approach for sludge management from the lower pond?

a. What is the anticipated quantity of sludge that is typically removed from the in-tunnel treatment system for the following on an annual or semi-annual basis?

i. Upper pond

ii. Lower pond iii.WTP clarifier system

b. Is sludge still preferred to be amended and reinjected back into the underground mine as generally described in the Mine Water 2024? If so, please provide the work plan for reinjection as proposed in Section 3.9 on that treatability study work plan, or a description of the other means and methods for reinjection preferred by CDPHE and EPA.

c. Is sludge preferred to be disposed offsite? If so, please answer the following:

i. If so, would TCLP analysis be anticipated for disposal?

ii. Is there a non-hazardous or hazardous waste facility that currently has received sludge disposal?

iii. What are the methods that have been used to remove sludge from the sediment ponds (both upper and lower)? Vacuum truck?

iv. Does sludge require dewatering prior to transfer and disposal?

CDPHE Answer #66:

a. Please see CDPHE answer to question #8. This information is not available on an annual or semi-annual basis for these systems.

b. No

c. It is possible TCLP analysis may be needed for future sludge disposal. Previously sludge has been removed by vacuum trucks and disposed of at A1 organics.

Vendor Question #67: Exhibit F and G. These are listed within the RFP with no further information about the requested scope of services for sampling. Sub-activities 2.1, 2.2, and 2.4 indicate monthly sampling but the sampling locations and analyses are not clear. Please provide an adequate amount of information so that an appropriate level of effort can be developed for the requested scope. It is understood that a SAP/QAPP will be developed, but an appropriate bid cannot be provided without reference to an existing SAP/QAPP, O&M Plan, or other document that defines the scope of sampling services. Please provide the following information:

a. Recommended existing SAP/QAPP or other guidance document.

b. Sample locations required for routine monthly monitoring of the in-tunnel treatment system for each media (groundwater, surface water, springs, ponds, WTP)

c. Sampling frequency for regularly required locations (e.g., monthly, annually, more frequent)

d. Required analyses

e. Anticipated quantity of seep/spring samples per quarter or annually

f. Other sampling locations and frequency that may be non-routine but anticipated to occur

CDPHE Answer #67:

The vendor is welcome to review existing SAP/QAPP documents available on the state's electronic records database here: https://oitco.hylandcloud.com/CDPHERMPublicAccess/index.html Once you are on the Environmental Records Search Website, under the Search Type Dropdown select CDPHERM HAZ Search by Site Name. Under the CDPHERM Site line type *Captain Jack*.

This will navigate you to all of CDPHE's online records for the Captain Jack Mill Site. Note that past SAP/QAPPs may not be reflective of future SAP/QAPP expectations or future sampling requirements.

https://urldefense.com/v3/__https:/oitco.hylandcloud.com/CDPHERMPublicAccess/index.html__;!!PUG2raq7KiCZwBk!YPFL8FWrlqUrKPiqvrMRjSgcVFI9bPlT3USDy4ihrFSZwGY-Qthjvzt_6oLpf4qGrHdbOjZG18iXLzeu4i4YEdElsQ$

Vendor Question #68: Exhibit G. Further information is needed to provide the appropriate level of effort for Sub-activities 2.5, 2.6, and 2.7. Please provide additional information or cite references for construction details, automated equipment, and water surface elevation data for all groundwater wells and boreholes, as follows:

a. Well bore diameter

b. Well screen interval

c. Method used to collect groundwater sample

d. Presence/absence of submersible pump

e. Presence/absence of transducer and field water quality monitoring equipment

f. Specific details on the make and model of the specific automated monitoring equipment

g. Method of data download

CDPHE Answer #68:

Please see CDPHE answer to question #36.

Vendor Question #69: Will O&M work require entrance and inspection of the Big 5 tunnel, bulkhead, and associated in-tunnel equipment?

CDPHE Answer #69:

Yes

Vendor Question #70: Water treatment plant. Additional details are requested in order to obtain pricing for a vendor-supplied packaged water treatment plant to mobilize onsite.

a. RFP cites maximum flow of 90 gpm. Please clarify if this is the capacity anticipated for the new WTP?

b. Water quality exiting the Big 5 Adit is unclear. Please provide summary data tables of anticipated water quality in a clear manner for all bidders to provide an appropriate assessment and vendor pricing.

c. Please provide existing vendor for lime that is used

d. What is the average or typical lime usage for the existing WTP?

e. Will any infrastructure from the existing WTP remain onsite for reuse for the new WTP?

f. What are the typical power requirements of the existing WTP?

g. How is the existing system typically winterized?

h. Is the existing system operated throughout the winter season?

CDPHE Answer #70:

a. Please refer to RFP.

b. Please see CDPHE Answer to question #13.

c. This information is not available.

d. This information is not available.

e. Please refer to the RFP.

f. This information is not available. Xcel service is provided by a single-phase pole-mount 25kVA utility transformer with a 120/240V secondary.

g. This information is not available.

h. Yes.

Vendor Question #71: Exhibit D Discharge Goals: Title is Low Flow Season: October – April – Discharge Goals.

a. Are there other goals outside of October to April?

b. Where is the point of compliance surface water location for comparison to these discharge goals? Is the point of compliance the effluent from the lower pond?

CDPHE Answer #71:

a. Exhibit D contains discharge goals for both the low flow season, October - April and the high flow season May - September.

b. The point of compliance for the Captain Jack Mill Superfund Site specified in the Record of Decision is in Left Hand Creek above the confluence with Puzzler Gulch.

Vendor Question #72: Exhibit C Statement of Work: Sub-Activity #2

a. What format/software is the Master Database using?

CDPHE Answer #72:

Please see CDPHE answer to question #38.

Vendor Question #73: Exhibit C Statement of Work: Sub-Activity #3

a. How often is sludge removal necessary?

b. Where is the sludge disposed of?

c. Where is site trash disposed of? (Haul distance?)

CDPHE Answer #73:

a. This information is not available.

b. In the past sludge has been disposed of at A1 Organics, however the vendor may select (with approval from CDPHE) alternative disposal methods and locations.

c. The vendor may select (with approval from CDPHE) where to dispose of trash.

Vendor Question #74: Temporary Treatment Feed: If possible, please provide available water quality data (field parameters such as pH & ORP and target analytical data such as metals, TOC, sulfate, alkalinity, etc.,) leaving the tunnel for the following scenarios before and after the methanol dosing system was commissioned: minimum, typical non-freshet, typical freshet, and maximum.

CDPHE Answer #74:

Please see CDPHE Answer to question #13.

Vendor Question #75: What is the pilot treatment system diversion flow rate and does it vary?

CDPHE Answer #75:

The pilot passive treatment system diverts between 5 to 10 gallons per minute.

Vendor Question #76: What are the current lime and methanol consumption rates, freshet and non-freshet?

CDPHE Answer #76:

Please see CDPHE answer to question #25.

Vendor Question #77: What is the as-built volume, depth, and estimated sludge depth for each pond?

Please provide any available sludge characterization data.

CDPHE Answer #77:

Please see CDPHE answer to question #8.

Vendor Question #78: For Task 1 Project Planning, are there existing plans to be modified? Or are new plans to be created?

CDPHE Answer #78:

Please see response to question #9.

Vendor Question #79: What is the distance to the bulkhead (and other referenced in-tunnel systems to be inspected & maintained such as recirculation and transfer systems, etc.,), and what are the ground conditions/safety of access to reach the bulkhead and other referenced in-tunnel systems?

CDPHE Answer #79:

It is approximately 650 feet from the entrance of the adit to the bulkhead. Generally ground conditions are muddy with water depths of approximately 6-8 inches in some places. There is no electricity/lighting past the entrance to the adit. As-builts for the sub-surface remedy available on state's electronic records database here:

https://oitco.hylandcloud.com/CDPHERMPublicAccess/index.html Once you are on the Environmental Records Search Website, under the Search Type Dropdown select CDPHERM HAZ Search by Site Name. Under the CDPHERM Site line type *Captain Jack*.

This will navigate you to all of CDPHE's online records for the Captain Jack Mill Site.

The document handle for the sub-surface remedy as-builts is: 59974835.

Vendor Question #80: Please provide more information on the database availability, software, and ownership.

CDPHE Answer #80:

Please see CDPHE answer to question #38.

Vendor Question #81: What level of data validation is required?

CDPHE Answer #81:

Level II

Vendor Question #82: What is the timeframe required for the current contractor to remove their equipment?

CDPHE Answer #82:

Please see CDPHE answer to question #33

Vendor Question #83: At what point on California Gulch Road does the contractor’s responsibility for road maintenance begin?

CDPHE Answer #83:

Please see CDPHE answer to question #19.

Vendor Question #84: For Task 6.1 Maintenance of Surface Remedy, are there any known maintenance issues which currently need to be addressed?

CDPHE Answer #84:

Please see CDPHE answers to question #8 and question #31.

Vendor Question #85: Please provide an owner-provided items list if possible.

https://urldefense.com/v3/__https:/oitco.hylandcloud.com/CDPHERMPublicAccess/index.html__;!!PUG2raq7KiCZwBk!YPFL8FWrlqUrKPiqvrMRjSgcVFI9bPlT3USDy4ihrFSZwGY-Qthjvzt_6oLpf4qGrHdbOjZG18iXLzeu4i4YEdElsQ$

CDPHE Answer #85:

Please see CDPHE answer to question #30.

Vendor Question #86: Does the CDPHE Annual Budget for the project referenced in the RFP begin with execution of the new contract (e.g., 6/1/26), or did it already begin for this calendar year?

CDPHE Answer #86:

The annual budget referenced in the RFP will begin upon the execution of the new contract.

Vendor Question #87: Does CDPHE expect the contractor to maximize the efficient usage of the full $1.8M annual budget (e.g., for optimization and continual site infrastructure improvements), or is the expectation to reduce cost where possible and not utilize the full annual budget?

CDPHE Answer #87:

CDPHE expects the vendor will put together a budget and fill out cost sheets with accurate anticipated costs required to meet the scope of work and other requirements referenced in the RFP. Please see CDPHE answer to question #43.

Vendor Question #88: We couldn’t find an Annual Report in the environmental records – could one be uploaded or provided as an addendum?

CDPHE Answer #88:

This information is not available.

Vendor Question #89: The transition period for the water treatment plant was discussed during the pre-bid, but is there more clarity on how long the treatment system can be down?

CDPHE Answer #89:

Please see CDPHE answer to question #33.

Vendor Question #90: The RFP asks for a transition plan. What is the current plan to transition the current operator to the new operator if a new operator is selected?

CDPHE Answer #90:

Please see CDPHE answer to question #33.

Vendor Question #91: For Task 3 of the cost/rate sheets: “Operation of the Permanent Water Treatment System,” please confirm that is operation of the in-tunnel water treatment system.

CDPHE Answer #91:

Task 3 includes operation of all permanent water treatment systems at the site, including the in-tunnel treatment system and the future external passive treatment system. The temporary active water treatment plant costs are part of Task 5.

Vendor Question #92: Assuming there is an EPA UIC permit for the injection of methanol, does the permit allow for injection of other amendments or only apply to methanol?

CDPHE Answer #92:

Please see CDPHE response to question #12.

Vendor Question #93: What voltage is available at the site — 120V, 208V, 240V, or 480V? Is it single-phase or three-phase?

CDPHE Answer #93:

Xcel service is provided by a single-phase pole-mount 25kVA utility transformer with a 120/240V secondary.

Vendor Question #94: What is the current estimated sludge production volume (gallons or wet tons) per pump out cycle? Please provide seasonal ranges over the past few years e.g., low season (winter)

vs. peak season (spring/summer).

CDPHE Answer #94:

Please see CDPHE response to question #8. This information is not available.

Vendor Question #95: What is the solids content (% TS) of the sludge at the time of removal?

CDPHE Answer #95:

This information is not available.

Vendor Question #96: What is the current pump out or removal frequency?

CDPHE Answer #96:

This information is not available. It is anticipated that both the upper and lower ponds will need to have sludge removed once the new contract is executed.

Vendor Question #97: Has sludge volume increased or decreased noticeably over the past few seasons?

CDPHE Answer #97:

This information is not available.

Vendor Question #98: Is the current practice of discharging treated effluent and waste sludge to the same pond permitted, and if so, under what specific permit number and permit type?

CDPHE Answer #98:

Please see CDPHE response to question #12.

Vendor Question #99: Is the pond classified as a surface water, a lined containment structure, or an evaporation/holding pond under state definitions?

CDPHE Answer #99:

The settling ponds were constructed as part of the surface remedy for the Captain Jack Mill Superfund Site. Superfund sites are regulated under the Comprehensive Environmental Response, Compensation and Liability Act (CERCLA).

Vendor Question #100: Will the new system be required to have completely separate discharge points for treated effluent and sludge? Under what regulatory basis is that separation required?

CDPHE Answer #100:

The Captain Jack Mill is a Superfund site regulated under the Comprehensive Environmental Response, Compensation and Liability Act (CERCLA). The point of compliance for the Captain Jack Mill Superfund Site specified in the Record of Decision is in Left Hand Creek above the confluence with Puzzler Gulch.

Long term sludge removal and disposal plans are still in development as part of the operation and maintenance of the future final remedy.

Vendor Question #101: What is the discharge permit number that we will be held to for our newly installed system?

CDPHE Answer #101:

Please see CDPHE response to question #12.

Vendor Question #102: Is the existing pond permitted or approvable as a sludge-only holding/storage structure under the new system configuration? If so, what liner, freeboard, and inspection requirements apply?

CDPHE Answer #102:

Please see CDPHE response to question #12.

Vendor Question #103: Can the treated effluent continue to discharge to any surface water or pond, or will subsurface disposal (soil absorption) be required?

CDPHE Answer #103:

The conveyance and discharge of treated effluent is described in the RFP.

Vendor Question #104: Are any upgrades or improvements to the existing site power supply currently planned as part of the project?

CDPHE Answer #104:

Current upgrades or improvements to the existing power supply are not currently planned, however improvements may be considered depending upon the long term needs for the Captain Jack Mill Superfund Site.

Vendor Question #105: Are modifications (e.g., shape or depth) allowable as part of the temporary system approach?

CDPHE Answer #105:

It is unclear what features question 105 is asking to modify. The vendor may propose reasonable modifications that it deems necessary to carry out the scope of work, however any/all modifications must be approved by CDPHE. Substantial or invasive modifications to completed remedies may not be allowed without in-depth evaluation and approval by CDPHE.

Vendor Question #106: What modifications can be made to the site for the new treatment system?

CDPHE Answer #106:

Please see CDPHE answer to question #105.

Vendor Question #107: For the cost sheets; requesting clarification:

a. Cost sheets show the project from May 1, 2026, to April 30, 2027. Should the project dates be changed to June 1, 2026, to May 31, 2027?

b. Task 2.1 - Are suppliers to provide environmental laboratory costs only with supplier labor costs for site sampling included in Task 3 or Task 5?

c. Task 3.2 - Is this specifically related to removing sludge from the settling ponds?

d. Task 3.2 - Is a special waste profile needed for the sludge disposal? Does one exist? Do suppliers need to include costs for characterization of the waste for a special waste profile?

e. Task 6.1 - Task asks for an annual cost. Will this be billed monthly in 1/12th increments?

f. Task 6.2 - Task asks for an annual cost. Will this be billed monthly in 1/12th increments?

g. Task 6.2 - Is this task to be an annual estimate that will be billed T&M, when performed, with markup?

CDPHE Answer #107:

a. 6/1/2026-5/31/2027

b. Include all anticipated environmental laboratory costs for all anticipated sampling in Task 3.

c. Include all anticipated sludge removal for the entire site operations for the annual budget.

d. This information is not available. CDPHE expects the vendor will put together a budget and fill out cost sheets with accurate anticipated costs required to meet the scope of work and other requirements referenced in the RFP.

e. No

f. No

g. Yes

Vendor Question #108: Can Attachment G be updated with sampling suite / requirements?

CDPHE Answer #108:

Please see CDPHE answer to question #36.

Vendor Question #109: Is there an expectation of how often an operator will be on-site?

CDPHE Answer #109:

The vendor may propose on-site expectations that the vendor thinks are appropriate for the scope of work. While operators are not expected to be on site 24x7, CDPHE does expect that an operator and/or contractor representative will be able to respond in the event of an emergency or if necessary due to changed site conditions.

Vendor Question #110: Has a wind speed design criteria been established for the site?

CDPHE Answer #110:

No

Vendor Question #111: Is there a maintenance program that is used to track PM and CM tasks?

CDPHE Answer #111:

There is not currently a maintenance program in use at the site.

Vendor Question #112: What is the sludge generation rate?

CDPHE Answer #112:

This information is not available.

Vendor Question #113: What is the lime consumption rate?

CDPHE Answer #113:

This information is not available.

Vendor Question #114: Is the road to the Niwot #2 borehole private property? Who owns this and the road to the IWTP?

CDPHE Answer #114:

The road to the Niwot 2 borehole is primarily on Boulder County property, however a small portion of the road is on private property. The road to the IWTP and Big 5 adit is considered a private road and crosses several private properties, Boulder County properties, USFS properties, and BLM Properties.

CDPHE and EPA have access agreements with the property owners along both roads. Road maintenance including snow removal are included in the scope of this RFP and the vendor awarded the contract will be responsible for the road maintenance snow removal of these roads.

Vendor Question #115: After the contract is awarded, when is access to the site granted?

CDPHE Answer #115:

Access will be granted after the awarded contract has been fully executed, and a contract kick-off meeting has been held.

Vendor Question #116: Why was the HDS system stopped?

CDPHE Answer #116:

This decision is not well documented. The vendor may propose alternatives to the current approach.

Vendor Question #117: What activities are involved in the monthly bulkhead inspection the contractor would be responsible for?

CDPHE Answer #117:

Descriptions of prior monthly bulkhead inspections are available in historic monthly reports. Historic monthly reports are available on the state's electronic records database here:

https://oitco.hylandcloud.com/CDPHERMPublicAccess/index.html Once you are on the Environmental Records Search Website, under the Search Type Dropdown select CDPHERM HAZ Search by Site Name. Under the CDPHERM Site line type *Captain Jack*.

This will navigate you to all of CDPHE's online records for the Captain Jack Mill Site. Note that past inspections may not be reflective of future bulkhead inspection activities.

https://urldefense.com/v3/__https:/oitco.hylandcloud.com/CDPHERMPublicAccess/index.html__;!!PUG2raq7KiCZwBk!YPFL8FWrlqUrKPiqvrMRjS…