An official website of the United States government.

This is not the current EPA website. To navigate to the current EPA website, please go to This website is historical material reflecting the EPA website as it existed on January 19, 2021. This website is no longer updated and links to external websites and some internal pages may not work. More information »

Purchasing of Services and Supplies

This procedure addresses the purchasing of services and supplies whose properties could affect the quality of sampling and measurement activities. Services can include but are not limited to equipment maintenance, repair, certification and proficiency test providers. Supplies can include but are not limited to chemical buffer/standard, chemical reagents, sample containers, disposable sampling equipment (i.e., COLIWASAs, bailers), laboratory supplies, tubing and latex gloves.

You may need a PDF reader to view some of the files on this page. See EPA’s About PDF page to learn more.