A. What year did installation of combined sewers stop?

B. What area in square miles is serviced by current combined sewer system?

C. What area in square miles is serviced by complete collection system?

Population

Year from 1.A. above

1975

2000

A. Served by combined sewer system

B. Served by overall collection system

C. Dry weather flow (annual average in mgd)

Current System

System Recommended in LTCP

A. Number of outfalls

B. Number of stream miles from first to last CSO outfall

C. Amount rain estimated to cause a CSO overflow after at least two weeks without rain.

i. In one hour

ii. In one day

iii. In five days

D. Estimated impacts in typical year from overflows.

i. Number of days that overflows would occur

ii. Amount of overflows in millions of gallons*

iii. Amount of BOD loading in tons*

iv. Number of hours that dissolved oxygen levels drop below 4 mg/L at any place downstream of CSOs due to CSOs.*

v. Number of days that E. Coli. levels exceed 235 colonies per 100 mL at any place downstream of CSOs due to CSOs.*

E. Percent of dry weather sewer flow from significant industrial users for:

i. 1-year rainfall event

ii. 5-year rainfall event

During past 10 years

During first 10 years under LTCP

A. Capital improvements to reduce impact of CSOs

B. Operations and maintenance expenses

C. For sewer connections into CSS or that flows through CSS (provide total number and estimated daily average flow in mgd)

i. Residential

ii. Commercial and industrial

iii. Contract services