Secondary Treatment

question 6

Multiple Choice

Secondary treatment

• A) Fails to remove dissolved nutrients
• B) Removes dissolved nutrients by use of denitrifying bacteria
• C) Can often remove metals such as copper
• D) Is less effective than primary treatment in curtailing hypoxia

---

Definitions:

W-3 Transmittal Form

A tax form used by employers to report the total earnings, Social Security wages, Medicare wages, and withholding for all employees for a year.

Federal Withholding Methods

Procedures the IRS sets for employers to withhold taxes from employees' paychecks, impacting the employees' net income and tax liabilities.

Backup Withholding

A form of withholding on certain income such as interest and dividends for taxpayers who fail to provide their correct taxpayer identification number (TIN) to payers.

Federal Withholding Tax

Income tax withheld from employees' wages by employers and sent directly to the government as partial payment of income tax.