R15PS00971_Putah_Creek_UST_Study-Q_and_A.pdf

Solicitation Number R15PS00971 Putah Creek UST – Pilot Work Study

Questions and Answers – Amendment 0003 and 0004

Q1: Can a contractor provide other alternatives than those specified in the reports and in the RFP?

A1: Yes. However, your pricing shall be based upon the current PWS and solicitation requirement.

Q2: The 5 day pilot test seems too short to adequately assess any in situ treatment system. Is there latitude to propose a longer pilot test and if so, would that latitude be taken into account in the evaluation of the cost proposals? This is especially critical to evaluate any in-situ bioremediation solutions

A2: Funding currently does not exist for a longer test. There are no trade-offs in the evaluation of proposals, please provide a price for what is required.

Q3: he RFP requests a five day test but then requires that the best solution is executed for this RFP. Contractor must provide a cost proposal for conducting the pilot study of the best of the three prescribed options? Essentially, the contractor must assume a preferred solution prior to evaluation or else price out proposal 3 different ways. Please clarify.

A3: Yes, that's correct; a current deliverable in this PWS is a cost analysis and estimate for final clean-up.

Q4: The 5 day pilot test seems too short to adequately assess any in situ treatment system.

Is there latitude to propose a longer pilot test and if so, would that latitude be taken into account in the evaluation of the cost proposals? This is especially critical to evaluate any in-situ bioremediation solutions

A4: The period of performance will be extended if conditions warrant.

Q5: Will limited fracturing of siltstone bedrock be allowed as an alternative to increase contact of possible biological amendments or chemical oxidants with the petroleum plume?

A5: Any deployed technology has to meet state waterboard approval, if it's approved then yes.

Q6: The RFP does not specific sampling for hexavalent chromium , and the BOR has removed Chromium 6 from the quarterly groundwater sampling suite. If in-situ oxidation is tested will additional testing for Cr6 be required.

A6: It's a petroleum gasoline site, testing for Cr6 is not expected.