There are several key advantages to using bioremediation as opposed to other, more traditional remediation methods. Firstly, because it can normally be conducted in-situ, bioremediation tends to be the most cost effective option, as it does not involve any costly transportation of hazardous materials.
The Seattle Sales Tax is collected by the merchant on all qualifying sales made within Seattle Groceries are exempt from the Seattle and Washington state sales taxes Seattle collects a 3.5% local sales tax, the maximum local sales tax allowed under Washington law
Washington State Sales Tax. The flip-side of the stateâs income tax-free status is its high sales taxes. The stateâs base sales tax rate is 6.5%. Since cities and counties collect additional sales taxes on top of that rate, in practice rates are typically at least 8% and often higher than 9%. The table below shows sales tax rates for all of the counties and the largest cities in Washington.