A diversity audit of the natural resources monographs took place in the spring and summer of 2022 at the California Polytechnic University, Humboldt Library. The goals of the audit were to construct a diversity audit that could be undertaken with very limited time and personnel availability. The findings have provided the library with important information about diversifying its science collections. This paper covers the audit methods, results, a discussion of the findings, and recommendations on best practices for diversifying science collections.