UNITED STATES ENVIRONMENTAL PROTECTION AGENCY

 WASHINGTON, D.C. 20460

 OFFICE OF WATER

MEMORANDUM 

DATE: September 7, 2010 

SUBJECT: Correction to the data presented in the DCN AD01208 and DCN AD01222 for the 

Airport Deicing Proposed Effluent Limitation Guidelines. 

FROM: Cuc Schroeder, EPA Statistician 

 Engineering and Analysis Division 

 Office of Science and Technology 

TO: Eric Strassler, Project Manager, Airport Deicing Effluent Guidelines

 Brian D’Amico, Environmental Engineer 

 Engineering and Analysis Division 

 Office of Science and Technology 

The purpose of this memorandum is to provide the correction to the data listed in DCN AD01222 

and DCN AD01208 (Airport Deicing Proposed Effluent Limitation Guidelines). Both DCN 

AD01222 and DCN AD01208 should contain the data that were used as the basis to calculate the 

daily and weekly limits for COD. The reason for the correction is that the wrong data sets were 

mistakenly put in these two DCNs, even though the correct data were available. The correct data 

provided in this memorandum will not change the proposed daily or weekly COD limits. 

DCN AD01222 is in Excel format and contains data used to produce both the daily and weekly 

COD limits. The daily and weekly average listing of COD in AD01222 are incorrect and need to 

be replaced with the data sent with this memorandum (i.e., an Excel file named 

“AD01222_Correction”containing the correct data will be sent to the engineers together with this 

memorandum). Details of the corrections for the daily and weekly data are given below. 

 The daily COD data in AD01222 are incorrect because the Season06 data are missing. 

Season06 was part of the data used in calculating the daily COD limit. The corrected 

data includes all the data that were in DCN AD01222 with the addition of the Season06 

data. These daily COD values can be used to reproduce the proposed daily limit for COD 

(271 mg/L). 

 The weekly average COD data in AD01222 are incorrect because some of the values are 

slightly different than they should be. The wrong data set was mistakenly put in the 

record even though the correct one was available. The corrected weekly data set is still 

derived from the daily data set, and the method used to calculate the weekly averages is 

still as described in the technical document for the proposed Effluent Limitation 

Guidelines. These weekly COD average values can be used to reproduce the proposed 

weekly limit for COD (154 mg/L). 
Page 2 of 9

DCN AD01208 is in Word format and contains data used to produce both the daily and weekly 

COD limits (data in AD01208 are identical to the data listed in AD01222). The daily COD data 

presented in Attachment 3 of AD01208 are correct. However, the weekly COD average values 

in Attachment 5 of AD01208 are incorrect and need to be replaced with the data given in 

Attachment 1 of this memorandum. Furthermore, the data presented in Attachment 6 of 

AD01208 are incorrect and need to be replaced with the data given in Attachment 2 of this 

memo. Details of the corrections for the weekly data are given below. 

 The weekly average COD listing in Attachment 3 of AD01208 is incorrect because some 

of the values are slightly different than they should be. The wrong data set was 

mistakenly put in the record even though the correct one was available. The correct 

listing of the weekly COD averages is given in Attachment 1 of this memorandum. The 

corrected weekly data set is still derived from the Albany daily data set, and the method 

used to calculate the weekly averages is still as described in the technical document for 

the proposed Effluent Limitation Guidelines. These weekly COD average values can be 

used to reproduce the proposed weekly limit for COD (154 mg/L). 

 The listing of the weekly average greater than the proposed weekly average limitation 

(see Attachment 6 of AD01208) is incorrect because some of the values are slightly 

different than they should be. The wrong listing was mistakenly included previously in 

AD01208. The correct listing is given in Attachment 2 of this memo. 
Page 3 of 9

 Attachment 1: Weekly average COD values used as the basis for the COD limitation proposed in 

Airport Deicing Effluent Limitation Guidelines. 

Starting Week 

(MM/DD/YYY) 

ArprtR-101 ArprtR-102 

Number of daily values 

in weekly average

Weekly Average 

(mg/L)

Number of daily 

values in weekly 

average

Weekly 

Average 

(mg/L)

12/1/1999 1 20.0 1 20.0 

12/13/1999 5 41.6 5 39.2 

12/20/1999 4 11.5 4 2.3 

12/27/1999 4 3.0 4 15.8 

1/3/2000 1 2.0 0 

1/17/2000 5 20.0 5 20.8 

1/24/2000 5 8.6 5 21.2 

1/31/2000 5 28.8 2 19.5 

2/7/2000 2 22.5 0 

3/13/2000 5 133.0 5 23.0 

3/20/2000 4 187.5 4 37.8 

3/27/2000 5 21.2 5 21.6 

4/3/2000 4 22.5 5 7.4 

4/10/2000 5 12.4 5 9.6 

4/17/2000 5 14.8 5 11.2 

4/24/2000 5 23.0 5 15.8 

5/1/2000 5 17.0 5 11.6 

5/8/2000 5 28.4 5 11.6 

5/15/2000 5 15.2 5 21.4 

5/22/2000 5 14.4 5 9.6 

5/29/2000 5 16.8 5 14.8 

6/5/2000 5 21.8 5 6.0 

6/12/2000 5 12.0 5 9.8 

6/19/2000 5 10.4 5 8.2 

6/26/2000 4 24.0 4 20.0 

2/19/2001 1 140.0 1 168.0 

2/26/2001 5 133.0 5 122.8 

3/5/2001 4 77.8 5 88.6 

3/12/2001 5 162.4 5 64.0 

3/19/2001 3 102.0 4 165.8 

3/26/2001 5 112.0 5 58.8 

4/2/2001 5 98.8 5 61.0 

4/9/2001 5 84.8 5 66.8 

4/16/2001 5 70.0 5 68.6 

4/23/2001 5 69.2 5 62.4 

4/30/2001 5 65.6 5 84.8 

5/7/2001 5 67.2 5 56.0 

5/14/2001 5 49.4 5 40.4 

5/21/2001 5 38.8 5 34.4 

5/28/2001 3 23.7 5 18.4 

6/4/2001 4 26.8 4 21.3 

6/11/2001 4 29.3 4 37.0 
Page 4 of 9

6/18/2001 4 27.3 4 23.3 

6/25/2001 5 32.8 5 31.0 

12/17/2001 5 37.6 5 41.4 

12/24/2001 5 29.8 5 30.4 

12/31/2001 5 36.2 5 45.4 

1/7/2002 4 36.8 4 31.5 

1/14/2002 5 33.2 3 31.3 

1/21/2002 5 28.0 5 28.4 

1/28/2002 4 19.8 4 20.3 

2/4/2002 3 43.7 3 31.3 

2/11/2002 5 46.4 5 49.6 

2/18/2002 5 53.2 5 53.2 

2/25/2002 5 63.4 5 62.2 

3/4/2002 5 69.4 5 74.6 

3/11/2002 5 82.8 5 63.4 

3/18/2002 5 65.8 5 60.0 

3/25/2002 5 64.6 5 57.0 

4/1/2002 5 65.2 5 51.2 

4/8/2002 5 47.6 5 31.8 

4/15/2002 5 30.0 5 28.6 

4/22/2002 5 32.8 5 31.2 

4/29/2002 5 31.4 5 22.0 

5/6/2002 5 29.6 5 23.0 

5/13/2002 5 32.2 5 24.2 

5/20/2002 5 27.0 5 22.8 

5/27/2002 5 28.2 5 23.0 

6/3/2002 5 25.6 5 22.8 

6/10/2002 2 49.5 2 69.5 

11/25/2002 5 27.6 5 35.0 

12/2/2002 5 50.6 5 45.8 

12/9/2002 5 44.0 5 36.6 

12/16/2002 5 49.2 5 41.2 

12/23/2002 4 46.3 4 35.0 

12/30/2002 5 46.2 5 40.4 

1/6/2003 5 40.8 5 33.6 

1/13/2003 5 66.6 5 55.4 

1/20/2003 5 57.8 5 48.8 

1/27/2003 4 55.5 4 53.3 

2/3/2003 4 77.8 4 54.0 

2/10/2003 5 68.8 5 51.4 

2/17/2003 5 72.2 5 53.0 

2/24/2003 5 93.6 5 67.4 

3/3/2003 5 101.6 5 48.4 

3/10/2003 5 125.4 5 57.8 

3/17/2003 5 86.0 5 56.8 

3/24/2003 5 84.6 5 54.4 

3/31/2003 5 68.2 5 42.0 

4/7/2003 4 94.0 4 46.8 

4/14/2003 4 104.0 5 74.6 

4/21/2003 5 133.2 5 73.8 
Page 5 of 9

4/28/2003 5 133.6 5 68.4 

5/5/2003 5 140.4 5 67.8 

5/12/2003 5 142.8 5 67.8 

5/19/2003 5 337.0 5 87.4 

5/26/2003 5 89.0 5 60.0 

6/2/2003 5 60.4 5 40.6 

12/1/2003 0 1 1.0 

12/8/2003 5 21.8 5 44.0 

12/15/2003 5 49.8 5 16.2 

12/22/2003 5 19.8 5 53.6 

12/29/2003 5 22.8 5 32.2 

1/5/2004 5 190.8 5 36.4 

1/12/2004 5 36.4 5 38.6 

1/19/2004 5 94.4 5 64.6 

1/26/2004 4 52.3 4 60.0 

2/2/2004 5 72.4 5 63.0 

2/9/2004 5 120.6 5 71.0 

2/16/2004 5 35.4 5 66.0 

2/23/2004 5 48.2 5 76.8 

3/1/2004 5 101.8 5 80.0 

3/8/2004 5 76.0 5 116.0 

3/15/2004 5 257.4 5 112.4 

3/22/2004 5 78.4 5 77.4 

3/29/2004 5 73.8 5 77.4 

4/5/2004 5 62.0 5 73.8 

4/12/2004 5 47.2 5 78.8 

4/19/2004 5 60.0 5 62.6 

4/26/2004 5 35.8 5 60.2 

5/3/2004 4 39.3 4 75.5 

12/13/2004 2 10.5 4 5.0 

12/20/2004 2 7.5 2 22.0 

12/27/2004 5 10.0 5 24.6 

1/3/2005 5 63.0 5 179.2 

1/10/2005 5 13.2 5 66.8 

1/17/2005 5 20.4 5 49.6 

1/24/2005 5 19.6 5 91.2 

1/31/2005 5 28.4 5 155.8 

2/7/2005 5 28.2 5 133.6 

2/14/2005 5 34.8 5 168.2 

2/21/2005 5 40.6 5 149.2 

2/28/2005 5 32.4 5 101.6 

3/7/2005 3 29.3 4 89.3 

3/14/2005 3 60.3 3 100.0 

3/21/2005 3 54.3 5 89.4 

3/28/2005 5 39.8 5 92.0 

4/4/2005 5 33.0 5 74.0 

4/11/2005 4 23.3 4 66.3 

4/18/2005 5 28.8 5 73.0 

4/25/2005 5 19.2 5 63.2 

5/2/2005 5 31.0 5 83.4 
Page 6 of 9

5/9/2005 4 17.5 4 79.0 

5/16/2005 2 12.0 2 74.0 

11/28/2005 2 34.5 3 53.3 

12/5/2005 5 67.2 5 122.2 

12/12/2005 3 29.7 5 65.0 

12/19/2005 4 27.0 5 89.4 

1/2/2006 2 29.0 2 145.5 

1/9/2006 1 30.0 1 91.0 

2/6/2006 5 41.4 4 97.0 

2/13/2006 5 41.0 5 99.6 

2/20/2006 5 27.8 5 79.2 

2/27/2006 4 35.5 5 86.8 

3/6/2006 4 32.3 5 81.8 

3/13/2006 5 28.0 5 69.6 

3/20/2006 3 31.0 3 64.0 

3/27/2006 5 20.4 3 66.3 

4/3/2006 5 24.0 5 62.8 

4/10/2006 4 10.3 4 50.8 

4/17/2006 3 48.0 3 42.3 

1/1/2007 5 19.8 3 60.0 

1/8/2007 4 2.8 4 16.5 

4/2/2007 3 29.0 3 61.0 

4/9/2007 1 26.0 1 86.0 

4/16/2007 5 41.4 5 117.6 

4/23/2007 5 21.4 5 106.0 

4/30/2007 5 25.4 5 84.4 

5/7/2007 5 9.2 5 38.8 

5/14/2007 5 6.4 5 25.4 

5/21/2007 5 6.8 5 32.6 

5/28/2007 1 136.0 1 90.0 

12/31/2007 2 111.0 0 

1/7/2008 5 312.2 0 

1/14/2008 5 46.4 0 

1/21/2008 5 44.0 0 

1/28/2008 5 41.0 0 

3/3/2008 4 50.3 4 49.8 

3/10/2008 5 54.4 5 43.2 

3/17/2008 5 56.4 5 41.6 

3/24/2008 5 46.8 5 36.8 

3/31/2008 5 41.6 5 32.8 

4/7/2008 5 47.2 5 40.6 

4/14/2008 5 37.6 5 31.2 

4/21/2008 5 47.4 5 34.0 

4/28/2008 5 27.4 5 27.4 

5/5/2008 5 26.6 5 28.8 

5/12/2008 3 40.7 5 37.8 

5/19/2008 5 20.6 5 18.6 

5/26/2008 5 19.6 5 17.0 

6/2/2008 3 38.7 5 36.4 

6/9/2008 1 38.0 1 22.0 
Page 7 of 9

12/8/2008 1 32.0 1 42.0 

12/15/2008 5 33.4 5 31.2 

12/22/2008 5 176.8 5 84.4 

12/29/2008 5 34.2 5 26.6 

1/5/2009 5 30.6 5 28.4 

1/12/2009 5 30.0 5 31.6 

1/19/2009 5 28.8 5 34.2 

1/26/2009 5 47.8 5 34.2 

2/2/2009 5 29.0 5 26.8 

2/9/2009 5 30.6 5 32.0 

2/16/2009 5 39.8 5 44.4 

2/23/2009 5 47.6 5 50.6 

3/2/2009 5 49.0 5 42.0 

3/9/2009 5 39.8 5 47.6 

3/16/2009 5 41.8 5 44.0 

3/23/2009 5 28.6 5 34.6 

3/30/2009 5 29.2 5 40.8 

4/6/2009 5 34.6 5 34.8 
Page 8 of 9

Attachment 2: Weekly averages greater than the proposed weekly average limitation. 

Date 

Unit ArprtR-101 Unit ArprtR-102 

Concentration (mg/L) Is Average 

Greater Than 

Proposed 

Limitation? 

Concentration (mg/L) Is Average 

Greater Than 

Proposed 

Limitation? 

Starting Week 

(MM/DD/YYY) Day within a 

Week 

Daily 

Value * 

Weekly 

Average 

Daily 

Value 

* 

Weekly 

Average 

3/20/2000 20MAR2000 126 187.5 Yes 2 37.75 No 

21MAR2000 212 30 

22MAR2000 97 26 

23MAR2000 315 93 

2/19/2001 23FEB2001 140 140.0 No 168 168.00 Yes 

3/12/2001 12MAR2001 575 162.4 Yes 92 64.00 No 

13MAR2001 91 52 

14MAR2001 63 75 

15MAR2001 36 40 

16MAR2001 47 61 

3/19/2001 19MAR2001 104 102.0 No 105 165.75 Yes 

21MAR2001 . 105 

22MAR2001 129 393 

23MAR2001 73 60 

5/19/2003 19MAY2003 460 337.0 Yes 95 87.40 No 

20MAY2003 655 86 

21MAY2003 178 83 

22MAY2003 290 101 

23MAY2003 102 72 

1/5/2004 05JAN2004 33 190.8 Yes 35 36.40 No 

06JAN2004 267 40 

07JAN2004 42 38 

08JAN2004 387 37 

09JAN2004 225 32 

3/15/2004 15MAR2004 69 257.4 Yes 100 112.40 No 

16MAR2004 316 124 

17MAR2004 699 118 

18MAR2004 123 126 

19MAR2004 80 94 

1/3/2005 03JAN2005 2 63.0 No 18 179.20 Yes 
Page 9 of 9

Date 

Unit ArprtR-101 Unit ArprtR-102 

Concentration (mg/L) Is Average 

Greater Than 

Proposed 

Limitation? 

Concentration (mg/L) Is Average 

Greater Than 

Proposed 

Limitation? 

Starting Week 

(MM/DD/YYY) Day within a 

Week 

Daily 

Value * 

Weekly 

Average 

Daily 

Value 

* 

Weekly 

Average 

04JAN2005 275 725 

05JAN2005 2 30 

06JAN2005 24 70 

07JAN2005 12 53 

1/31/2005 31JAN2005 20 28.4 No 72 155.8 Yes 

01FEB2005 24 72 

02FEB2005 25 79 

03FEB2005 35 196 

04FEB2005 38 360 

2/14/2005 14FEB2005 40 34.8 No 94 168.20 Yes 

15FEB2005 33 118 

16FEB2005 38 238 

17FEB2005 30 175 

18FEB2005 33 216 

1/7/2008 07JAN2008 28 312.2 Yes No values for 

this week 08JAN2008 18 

09JAN2008 1042 

10JAN2008 433 

11JAN2008 40 

12/22/2008 22DEC2008 32 176.8 Yes 35 84.40 No 

23DEC2008 35 29 

24DEC2008 27 30 

25DEC2008 674 282 

26DEC2008 116 46 

* Daily Values in bold text are greater than the proposed daily maximum limitation.