Another researcher identified the character of household wastewater using average and. maximum levels. Average BOD. 5 levels were identified as 200 mg/L with a maximum of 400 mg/L, average TSS levels of 200 mg/L with a maximum of 400 mg/L, and average Grease levels of 50 mg/L. with a maximum of 150 mg/L (Laak, 1986).
home glossary Circular E. Circular E, Employer's Tax Guide, also known and Publication 15, is published annually by the IRS and includes definitions of frequently used payroll terms and concepts, rules and regulations for the filing of federal employment taxes, and percentage method and wage bracket federal income tax withholding tables.
2012 Publication 15 (Circular E) Released by the IRS. The Employerâs Tax Guide, or Publication 15, is now available for use in 2012. It is also known as Circular E. The publication offers basic employment tax information to help the needs of small business employers. There are not significant changes to the 2012 publication.