Engine Water Sample Testing for MH-65E Aircraft

The Purpose of Amendment 5 is to add a clause to the terms and conditions; and to respond to a vendor question. Question: Our laboratory is not able to perform ash content analysis on solid samples. However, based on the responses provided by USACE to vendor

questions in the solicitation, it appears that chloride, sulfate, and hardness analyses may be performed in addition to the other originally requested methods. Could you please confirm whether this substitution would be acceptable, or if you would prefer that we no-bid this specific method? Answer: Ash testing is a required part of the USCG test procedures as outlined in the Statement of Work, therefore inability to test for ash would render any submitted quote technically unacceptable. The purpose of Amendment 4 is to add additional information to the Statement of Work. The purpose of Amendment 3 is to respond to vendor

questions. Question: The Statement of Work lists the required parameters but does not specify the analytical methods to be used. Could you please clarify what specific analyses or method standards are required for this project? Answer: There are no specific ways of testing or specific ISO reference for which the water samples must be tested with. They can have the water analyzed by an accredited laboratory against the water-quality

requirements listed in our Maintenance Manual, using standard ISO / ASTM methods for each of the following parameters: appearance, chloride, sulphate, sodium, hardness, conductivity at 25 °C, pH, and dry residue (total dissolved solids). SAFRAN HE does not specify a precise test method, as long as parameters listed are measured. Question: We would like to confirm whether the Government will be responsible for collecting all water samples, with the contractor responsible only for providing sample containers, outbound shipping of kits, receiving returned samples, and performing the laboratory analysis. Answer: Yes, the government is responsible for all water sample collecting and the contractor is responsible for providing sample containers, outbound shipping of kits, receiving samples, performing laboratory analysis, providing documentation of specific test results, and sending out notifications. Question: Aspect / Appearance Testing Requirement: The Statement of Work requires reporting of “aspect” for water samples. The partners have indicated they do not perform a specific aspect/appearance analysis but can provide True Color testing (Standard Method SM

2120) as an alternative. Please confirm whether True Color testing is acceptable as a substitute for the aspect requirement. Answer: The aspect / appearance test is solely a visual inspection of the appearance of the water sample ‘as is.’ No prior processing is required. Question: Ash Testing Method: The laboratory has advised that ash testing is typically performed on solid samples. They proposed filtering solids present in the water sample and determining ash content from the filtered material. Please confirm whether this methodology would be acceptable under the SOW

requirements. Answer: There are no specific ways of testing or specific ISO reference for which the water samples must be tested with. They can have the water analyzed by an accredited laboratory against the water-quality