Document ID: EPA-HQ-OW-2006-0771-1479
Agency: epa
Document Type: Supporting & Related Material
Title: 
Posted Date: 2008-09-15T04:00Z

Steam Electric Data Request Follow-Up Questions

Project Name:  Steam Electric Detailed Study

	Project No.:  0172.04.022.041

Company Name:  Georgia Power

	Contact Name:  William R. Evans

Plant Name:  Plant Wansley	Contact Phone Number: 404-506-7031

or Email Address:  wrevans@southernco.com

ERG Staff (or ERG Rep) Name: Sarah Holman

Company Affiliation: ERG	Date: 11/21/07

This document contains CBI:   ___  Yes    x       No

	Type of  Contact:     x      Email           Telephone           

General Subject:  Data Request Assistance / Follow-Up 

Follow-Up Question Number	CBI =

Yes (Y)

No (N)	Data Request Question Number	Data Request Page Number	

Question/Answer

1	N	8	B-3	Q: The combined cycle units (Units 6-9) operated at Plant
Wansley are not included in Table 2.  Please verify that the reason
Georgia Power did not include these combine cycle units in its data
request response is that it did not operate these units in 2006.

Please confirm that Unit 5 was not included in Table 2 because it is an
oil-fired combustion turbine with no steam electric operations.

A:  

2	N	11	B-8	Q: Frequency of drainage from coal pile is given as 365 days.
 Does the plant have an estimation of the actual number of days of
drainage from the coal pile, or an estimation of the number of days of
rain in 2006? 

A:  

3	N	16	B-10	Q: Type of fly ash handling system is listed as both wet and
dry.  What is the approximate percentage of the time that the fly ash is
handled in a dry fashion?

A:  

4	N	18	B-12	Q: The total bottom ash sluice flow rate for Units 1 and 2
is 2,566 gpm in Table 6, whereas it is listed as 2,580 gpm in the
process diagram, 5-1.  Please explain this difference.  Which flow rate
is more accurate?

A:  

5	N	31	B-21	Q: Why was wastewater generated from the Unit 2 air
pre-heater, but not from the Unit 1 air pre-heater in 2006? 

A: 

 

6	N	38	B-25	Q: CT 1 and CT 2 both used gaseous chlorine in 2006, with
the same average addition amount, but the amount is listed as ppd for CT
1 and gpd for CT 2.  Please confirm that the measurement units should be
ppd for both.

A:  

7	N	38	B-25	Q: No measurement units were provided for the average
addition amount of liquid sodium hypochlorite for CT 2.  Please provide
the measurement units.

A:  

8	N	43	B-26	Q: Outfalls 01D, 01F-01K, 02, 02D-02K, 03A, 03B, and 04-06
are not listed in Table 14 or the process diagrams.  Did they discharge
in 2006?  03A and 03 B refer to a north and south ash pond.  Does the
plant operate two ash ponds (only one is indicated on the process
diagram and in the wastewater treatment tables)?

A:  

9	N	47	B-28	Q: Regarding Diagram 5-1, please confirm that no wastewater
treatment occurs in the Low Volume Waste Basin.

A:  

10	N	47	B-28	Q: For WWT-1 (Diagram 5-1), please confirm that pH
adjustment occurs within (as part of) the ash pond and not within a
separate tank/pond as indicated in the diagram.

A:  

11	N	47	B-28	Q: On Diagram 5-1, there is more wastewater shown entering
the ash pond than exiting.  Please confirm that the reason for this is
evaporation.

A:  

12	N	47	B-28	Q: For WWT-2 (Diagram 5-2), please confirm that pH
adjustment and chemical precipitation occur within the settling pond and
not within separate vessels as shown on the diagram?  What chemicals are
typically added for chemical precipitation?

A:  

13	N	47	B-28	Q: For WWT-3 (Diagram 5-3), is the effluent from the coal
pile runoff pond continuous at 30 gpm or intermittent?

A:  

14	N	49	B-32	Q: For WWT-2, does the plant operate two settling ponds
(only one is shown on Diagram 5-2)?  If so, what is the volume and
wastewater residence time in each pond?

A:  

15	N	49	B-32	Q: For WWT-3, does the plant operate two settling ponds
(only one is shown on Diagram 5-3)?  If so, what is the volume and
wastewater residence time in each pond?

A:  

16	N	51	B-33	Q: For WWT-1, the “Average Dose Concentration” of
sulfuric acid is listed as “Not measured – varies as necessary for
pH”.  As requested in EPA’s email to UWAG on 7/11/07, please provide
the concentration of the active ingredient added (i.e., the amount of
active ingredient contained in the chemical product).

A:  

17	N	52	B-34	Q: For WWT-1, did FAS, BAS, and PMRS enter the ash pond 24
hpd and 365 dpy?  Was the recycle from the ash pond used for RECYC-FAS,
RECYC-BAS, and RECYC-PMRS 24 hpd and 365 dpy?

A: