ORSANCO’S ROLE IN SPILL EVENTS

• COMMUNICATION• TIME OF TRAVEL ESTIMATION• INSTREAM CONCENTRATION CALCULATION• ON-RIVER RESPONSE

ORSANCO ODS

lxz 2/9/10

Overview of ODS Network

Drinking Water UtilitiesOrganics Detection Sites

37%

24%

19%

10%

5%

2% 2%

Chloroform

Dichlorobromomethane

Dibromochloromethane

Tetrachloroethylene

1,1 Dichloroethene

Bromoform

1,1 Dichloroethane

Seven Compounds Most Frequently Detected by the Organics Detection System

Organics Detection SystemORSANCO ODS Benzene DetectionsFebruary 2 - 19, 2003

0

2

4

6

8

10

12

14

16

0 2 4 4 8 7 2 9 6 1 2 0 1 4 4 1 6 8 1 9 2 2 1 6 2 4 0 2 6 4 2 8 8 3 1 2 3 3 6 3 6 0 3 8 4 4 0 8

Days

Ben

zene

, ug/

L

Weirton Wheeling Sistersville Parkersburg Huntington Portsmouth Cincinnati Louisville

Mon Tues Wed Thur Fri Sat Sun Mon Tues Wed Thur Fri Sat Sun Mon Tues Wed Thur 2/2 2/3 2/4 2/5 2/6 2/7 2/8 2/9 2/10 2/11 2/12 2/13 2/14 2/15 2/16 2/17 2/18 2/19

ORM 65 ORM 87 ORM 138 ORM 191 ORM 304 ORM 351 ORM 463 ORM 609

MCL Benzene, 5 ug/L

Spill Detection Program, Volatile Organics

CONCENTRATION OF METHYLENE CHLORIDE IN OHIO RIVER (ug/l)In samples colleced by ORSANCO boat, 5/4/07

ORM RDB LDB323.0 ND ND327.0 ND ND332.8 ND ND337.1 ND 7.60342.0 ND 7.31344.2 ND 4.60345.2 ND 3.98347.5 ND 2.42348.5 ND 4.80349.3 ND 4.46351.0 ND 2.26352.0 ND 4.25353.0 ND 4.37354.0 0.18 2.04

ORSANCO Stream criteria - 4.6 ug/l

Below 0.2 ppbNot detectedDetected

ORSANCO Source Water ProtectionProgram Integration

WATER QUALITYMONITORING

INTER-AGENCYCOMMUNICATION

EMERGENCYRESPONSE

OSWP