When material is the method

What we cannot sell you

On this page11

Precleaned containers Which is the honest line for a compliance buyer And it is not a gap we can close with care Fluoropolymer LDPE Autoclavability, which we do not record Preservation chemistry What we can tell you And which of our materials map to the codes Saying so is the useful service References

Compliance sampling buys a certificate, and we do not sell one.

Precleaned containers

Containers for regulated sampling are sold cleaned to a documented procedure, in a lot, with a certificate of analysis showing what was not found in them. Nothing on this shelf is.

Which is the honest line for a compliance buyer

If the result goes to a regulator, buy from a supplier who certifies the container. That is a different product from a packaging container and it is priced like one.

And it is not a gap we can close with care

A clean-looking bottle is not a certified one, and the certificate is the point: it is the evidence that the blank was blank.

Fluoropolymer

Zero on this shelf. Any Table II row calling for FP cannot be served here, and those rows exist because even polyethylene is too reactive for them.

LDPE

Also zero. Which rules out the Cryptosporidium and Giardia rows completely, since the table names LDPE specifically for them.

Autoclavability, which we do not record

The PA code is defined as a plastic "made of a sterilizable material". Our catalog holds material, capacity and neck finish, and not that. We have 13 polypropylene containers and cannot certify any of them as sterilizable.

Preservation chemistry

Nitric acid, sulfuric acid, sodium thiosulfate, sodium hydroxide. The table specifies them per row and they belong to the laboratory running the analysis, not to a container catalog.

What we can tell you

Material, capacity, neck finish, closure and liner. For the non-regulated two thirds of this craft that is most of the decision.

And which of our materials map to the codes

108 glass are G. 92 HDPE are P. 13 PP are the example the PA footnote gives, without the sterilization claim. 146 PET map to nothing.

Saying so is the useful service

A buyer who learns at the laboratory that their PET bottles were never in the table has lost a field day. Learning it from a catalog page costs nothing.

References

40 CFR 136.3, Table II, "Required Containers, Preservation Techniques, and Holding Times", footnote 1: "'P' is for polyethylene; 'FP' is fluoropolymer (polytetrafluoroethylene [PTFE]; Teflon(R)), or other fluoropolymer, unless stated otherwise in this Table II; 'G' is glass; 'PA' is any plastic that is made of a sterilizable material (polypropylene or other autoclavable plastic); 'LDPE' is low density polyethylene." Footnote 2: "Except where noted in this Table II and the method for the parameter, preserve each grab sample within 15 minutes of collection." ecfr.gov

The Davis Pack Supply catalog, measured 19 October 2026. The field sampling shelf is 768 rows: 359 containers and 409 closures. 5 mL to 950 mL with a median of 118; 124 containers at 60 mL or under, 211 at 120 or under, 317 at 500 or under, and nothing above a litre. 146 PET, 108 glass, 92 HDPE, 13 PP, no LDPE and no fluoropolymer. 194 jars, 163 bottles, 2 tubes. 103 clear, 82 white, 52 amber, 34 natural. Closures: 346 continuous thread, 27 dome lids, 14 phenolic, 11 liners and sealing discs, 6 specialty.

The archetype behind this shelf is ind-lab: 10 to 1,000 mL, narrow mouth, glass and HDPE, cold fill, thin, aqueous, with "reagent or sample, autoclavability and chemical resistance" as its stated reason. The capacity window fits this craft exactly, which is rare. Our catalog does not record autoclavability for any product, which matters here because Table II's PA code is defined by it.

Written from 40 CFR 136.3 Table II and from the catalog as it stood on 19 October 2026. Part 136 governs Clean Water Act compliance monitoring; it is used here for everything else as the best available statement of what a container does to a water sample, not as a rule that binds a student with a creek. Nothing on this shelf is sold precleaned or certified for regulated sampling, and no preservation chemistry is given, because that belongs to the laboratory running the analysis.