Analytical_Requirements_Questions_1_0006.pdf
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- 2-BACA_1-HAYSTACK SDV
- Solicitation number
- 140A0926Q0006
About this file
This is a Questions and Answers (Q&A) document from a federal contract opportunity related to sheep dip vat remediation work for the Bureau of Indian Affairs (BIA).
The document addresses two primary areas of clarification requested by a prospective contractor. First, it seeks clarification on conflicting analytical requirements regarding whether arsenic analysis is required in addition to pesticide analysis using EPA Method 8081A. The contractor notes that contradictory guidance was provided in Government responses dated January 30, 2026 and February 5, 2026, and requests confirmation of arsenic testing requirements, applicable analytical methods (suggesting USEPA Method 7061A), and action levels, while noting that historical sheep dip sites primarily used only chlorinated pesticides without heavy metals. Second, the document addresses waste disposal cost estimation requirements, noting conflicting guidance on whether contractors must provide estimates for both hazardous and non-hazardous waste disposal. The contractor argues that historical precedent from similar BIA projects shows excavated soil with elevated toxaphene concentrations has consistently been characterized as non-hazardous, and requests clarification on whether both disposal scenarios are required and, if so, how costs should be presented—either as separate total project costs or as a single total with separate line items or options for each disposal method.
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1. Analytical Requirements In the Government’s Response to Questions dated January 30, 2026, the response to Question #2 indicates that only pesticide analysis using EPA Method 8081A is required. However, in the Government’s Response to Questions dated February 5, 2026, the response to Question #2 indicates that arsenic should also be included in the analytical requirements.
Arsenic at the sheep dip vat may have been error in the report, however the focus is toxaphene and chlorinated pesticides associated with this chemical. Some sheep dip sites vary in the chemical that is used. If arsenic is to be tested, utilize the USEPA Method 7061A. Only chlorinated pesticides were used at the Sheep Dip Vats not any heavy metals like arsenic, if this presence.
Could the Government please clarify whether arsenic analysis is required in addition to pesticide analysis by EPA Method 8081A? If so, please identify the required analytical method(s) and applicable action levels for arsenic. See the method provided above for arsenic.
2. Hazardous vs. Non-Hazardous Waste Disposal In the Government’s Response to Questions dated February 5, 2026, the response to Question #3 states that the contractor should provide an estimate for both hazardous and non-hazardous waste disposal. Toxaphene is abandoned hazardous substances, if the toxaphene levels show less than 0.5 mg/l via TCLP analysis , wastes will be manifest and hauled in sealed roll off containers and dispose at Subtitle D landfill . If the sampling results show above 0.5 mg/l, the waste will be managed as hazardous waste. Sampling defines the action of disposal that will be taken by the potential contractor, as BIA works with the NNEPA Superfund program which is regulatory agency.
Based on our extensive experience performing sheep dip vat remediation projects for BIA, excavated soil, including soil with elevated toxaphene concentrations, has consistently been characterized as non-hazardous following waste profiling. To our knowledge, similar projects have not resulted in Subtitle C hazardous waste determinations. Accordingly, requiring offerors to assume that excavated material may be hazardous and require disposal at a Subtitle C landfill is unlikely based on historical precedent and site conditions. This assumption would substantially increase estimated project costs and could result in proposals that are not representative of the most probable project execution scenario. In addition, requiring both hazardous and non-hazardous disposal assumptions may introduce significant variability among proposals, complicating the Government’s ability to conduct a fair and consistent price evaluation and assess best value.
Could the Government please confirm whether estimates for both hazardous and non-hazardous waste disposal are required? If both are required, we respectfully request clarification on how these costs should be presented. For example, would the Government prefer:
• Separate total project costs (one assuming non-hazardous waste and one assuming hazardous waste), or
• A single total project cost with separate line items or options for non-hazardous and hazardous waste disposal?
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