GRI assisted Powell’s Books with the registration of five drywells under the DEQ’s Underground Injection Control (UIC) program. The drywells are located at Powell’s warehouse facility in northwest Portland. Our work included research of the drywell installation and permit data with the City of Portland, collection of data required by DEQ, and discussions with DEQ regarding required sampling and analysis. GRI personnel completed field work required for initial registration, including collection of soil samples from catch basins associated with the drywells. The samples were transported under chain-of-custody protocol to an analytical laboratory for testing. GRI prepared a detailed spill prevention, response, and maintenance plan for submittal with the DEQ registration package.