Streamline - Spring 2014 - (Page 33)

Wastewater Math QUESTIONS BY DONNA LAWSON, WASTEWATER TECH II 1. 4. a. b. c. d. a. b. c. d. A solution is 5.6% soda ash. What is the concentration in mg/L? 5.6 mg/L 56 mg/L 56,00 mg/L 56,000 mg/L 2. A water treatment plant is receiving a chlorine dose of 2.2 mg/L at a flow of 1.51 MGD. If the flow increases to 2.45 MGD, what would the corresponding chlorine dose increase be? a. 3.6 mg/L b. 4.2 mg/L c. 0.36 mg/L d. 36 mg/L The density of a liquid is 67.2 lb/ft3. What is the specific gravity? 1.00 10.8 1.08 8.05 5. Find the pounds of lime needed to neutralize a sour digester that holds 175,000 gallons and has a volatile acid concentration of 1,652 mg/L. a. 2,411 lb b. 24.11 lb c. 241.1 lb d. 2.411 lb 3. a. b. c. d. What is the circumference of a clarifier, if the radius is 9 feet? 23.4 ft 56.5 ft 63.6 ft 18 ft P.O. Box 234 · Rocky Gap, VA 24366 Phone: 276-928-1712 Fax: 276-928-1814 For All of Your Monitoring and Control Needs . . . SCADA and Telemetry Systems Control Panels for Pump Stations and Tanks Complete Custom Metal Fabrication Field Instruments and Sensors Industrial Control Panel Assembly- UL®-508A listed 24/7 Service, Support and On-Site Training Email: 578231_AMR.indd 1 w w w . v r16/03/12 r5:34 PM w a . o g 33

Table of Contents for the Digital Edition of Streamline - Spring 2014

From the President
From the Executive Director
The Importance of an Immediate Response
What’s New in UV?
Proper Disposal of Pharmacy Products
Source Water Protection Notes
Ergs, Joules and Other Stuff
Establishing a Water Distribution System Flushing Program
Wastewater Math
Curtis Water Wins Big in D.C.
Throwing My Loop: Friends to Keep You Warm
eLearning Benefits
Membership Application
Do You Know What Your VRWA Benefits Are?
VRWA Mailbag
Welcome New Members
Training Calendar
Board of Directors
VRWA Committees
Index to Advertisers/

Streamline - Spring 2014