Rationale

Table 2 currently references sieve sizes in both SI and inch-pound units. While this practice is permitted by C09 guidance documents, the allowance is not explicitly stated in ASTM C637. Adding a note to clarify that dual-unit representation is intentional and consistent with C09 guidance will improve transparency and reduce potential confusion among users. The current wording in Table 1 refers to "available materials." The verbiage should be revised to "typical values" since ASTM is not monitoring current suppliers or available materials but the values in that column or beneficial to the user so they should not be eliminated.