### Atrazine Special Review Docket Archived Emails

**Atrazine Special Review Docket Archived Emails -**  **Melanie Biscoe Melanie Biscoe**  **Melanie Biscoe**

**- June**  **2008 to**  **November NovemberNovember**  **November**

**2010 Melanie Biscoe**  **to: biscoe.melanie**  **12/20/2010 09:52 AM**

**----- Forwarded by Melanie Biscoe/DC/USEPA/US on 12/20/2010 09:51 AM -----**
**From: <dan.campbell@syngenta.com>**  **To: Melanie Biscoe/DC/USEPA/US@EPA**  **Date: 11/04/2008 10:11 AM**  **Subject: RE: Just checking in** 

Hey MelanieThanks for the message! I'll have an answer for you soon with the analytics as well. Hope you can avoid long election lines today! Best regards, Dan

---------------------------------- Dan Campbell Senior Regulatory Product Manager II Syngenta Crop Protection, Inc. (336) 632-7627 Mobile: (336) 509-5910
-----Original Message----- From: Biscoe.Melanie@epamail.epa.gov [mailto:Biscoe.Melanie@epamail.epa.gov] Sent: Tuesday, November 04, 2008 8:57 AM To: Campbell Dan USGR Subject: Just checking in

Hi Dan, I just wanted to let you know I haven't forgotten about you over here! I'm putting together a tracker for atrazine and will get back to you before the end of the week on the issues we talked about over the phone, particularly the CWS waivers. Will talk with you soon, Melanie Biscoe Chemical Review Manager Special Review and Registration Division Office of Pesticide Programs biscoe.melanie@epa.gov 703-305-7106

-------------------------------------------------------- This message may contain confidential information. If you are not thedesignated recipient , please notify the sender immediately , and delete the

original and any copies. Any use of the message by you is prohibited. **----- Forwarded by Melanie Biscoe/DC/USEPA/US on 12/20/2010 09:51 AM -----**
**From :**  **<dan.campbell@syngenta.com> To:**  **Melanie Biscoe/DC/USEPA/US@EPA Date:**  **01/15/2009 05:23 PM Subject:**  **RE: Atrazine: CWS Waiver Request Followup Questions**

Hi Melanie, Thank you for these questions. All the AMP samples (raw and finished water) collected in 2003 and 2004 were analyzed by the immunoassay method (IA), which provided measured results for atrazine only. Any sample that had an IA atrazine result of 3.0 ppb or greater was additionally re-analyzed by the GC/MS method. The GC/MS method provided results for atrazine and the 3 chloro-degradates (DACT, DEA, and DIA). For these samples, where both IA and GC/MS results were available, the GC/MS results were reported. Additionally, a CWS' daily corresponding pair of raw and finished water were both analyzed by the GC/MS method when either the raw water or the finished water sample had an IA atrazine result of 3.0 ppb or greater (this addition was implemented starting in 2004). We switched the analysis procedure to the LC/MS/MS direct measurement methodology for all samples starting in ~August 2005. Below are specific answers to your questions: (1) There are 10 of the CWSs that have at least 5 consecutive years of atrazine data and theoretically should have 5 consecutive years of TCT data, but for some reason 2003 has TCT data, 2005 has TCT data, but 2004 does not. Do you have TCT (GCMS) data for the following CWSs for 2004? Syngenta's answer: Please note that the embedded file (pic01758.jpg) showed 8 CWS (not 10). All samples from these 8 CWS in 2004 resulted in atrazine concentrations less than 3.0 ppb when analyzed by the immunoassay method. Therefore, none of these samples were analyzed by the GC/MS method and there are no TCT values based on GC/MS analyses available. For confirmation, please see the results compiled in the attached spreadsheet. (2) E. Jefferson Water Works Dist. #1 has TCT (GCMS) data for 2002 and 2005 but is missing it for 2003 and 2004. Is TCT (GCMS) data for 2003 and 2004 available? Syngenta's answer: All samples from 2003 and 2004 from this CWS resulted in atrazine concentrations less than 3.0 ppb when analyzed by the immunoassay method. Therefore, none of these samples were re-analyzed by the GC/MS method and there are no TCT values based on GC/MS analyses available. For confirmation, please see the results compiled in the attached file. (3) There are 5 CWSs where there may be TCT (GCMS) data for 2003, but we only have atrazine-only immunoassay data. Is there TCT (GCMS) data for these CWSs for 2003? Syngenta's answer: Five samples from two of these CWS had 2003 GC/MS results. Those CWS are Olathe (WP1 or Water Plant #1, KS2009115) and Maryville MO (MO1010508). All other samples from 2003 for these 5 CWS resulted in atrazine concentrations less than 3.0 ppb when analyzed bythe immunoassay method

. The GC / MS TCT values for the 5 samples along

with all the other available data for these five CWS are provided in the attached file. (4) There are 13 CWSs where there may be TCT (GCMS) data for 2003 and 2004, but we only have atrazine-only immunoassay data. Is there TCT (GCMS) data for these CWSs for 2003 and 2004?
Syngenta's answer: Eight samples from four of the thirteen CWS had 2003 and 2004 GC/MS results. Those CWS are Emporia KS (KS2011105), Linn Valley Lakes POA KS (KS2010712), Public Wholesale WSD #12 KS (KS2013919) and Smithville MO (MO1010748). All other samples from 2003 and 2004 for these CWS resulted in atrazine concentrations less than 3.0 ppb when analyzed by the immunoassay method. The GC/MS TCT results for these eight samples along with all the available data for these CWS are provided in the attached file.
Please let me know if you need any more information
Thanks Dan

---------------------------------- Dan Campbell Senior Regulatory Product Manager II Syngenta Crop Protection, Inc. (336) 632-7627 Mobile: (336) 509-5910
-----Original Message----- From: Biscoe.Melanie@epamail.epa.gov [mailto:Biscoe.Melanie@epamail.epa.gov] Sent: Wednesday, January 14, 2009 3:33 PM To: Campbell Dan USGR Subject: Atrazine: CWS Waiver Request Followup Questions Importance: High

Dan, I'm working on the CWS waiver today and have some questions for you:
(1) There are 10 of the CWSs that have at least 5 consecutive years of atrazine data and theoretically should have 5 consecutive years of TCT data, but for some reason 2003 has TCT data, 2005 has TCT data, but 2004 does not. Do you have TCT (GCMS) data for the following CWSs for 2004? (Embedded image moved to file: pic01758.jpg) (2) E. Jefferson Water Works Dist. #1 has TCT (GCMS) data for 2002 and 2005 but is missing it for 2003 and 2004. Is TCT (GCMS) data for 2003 and 2004 available? (3) There are 5 CWSs where there may be TCT (GCMS) data for 2003, but we only have atrazine-only immunoassay data. Is there TCT (GCMS) data for these CWSs for 2003?( Embedded image moved to file : pic 29954

. jpg )

(4) There are 13 CWSs where there may be TCT (GCMS) data for 2003 and 2004, but we only have atrazine-only immunoassay data. Is there TCT (GCMS) data for these CWSs for 2003 and 2004? (Embedded image moved to file: pic20888.jpg)

Answers to these questions (and accompanying data, if available) will REALLY help!! Thanks, Melanie Biscoe Chemical Review Manager Special Review and Registration Division Office of Pesticide Programs biscoe.melanie@epa.gov 703-305-7106

-------------------------------------------------------- This message may contain confidential information. If you are not the designated recipient, please notify the sender immediately, and delete the original and any copies. Any use of the message by you is prohibited.

**----- Forwarded by Melanie Biscoe/DC/USEPA/US on 12/20/2010 09:51 AM -----**
**From: <dan.campbell@syngenta.com>**  **To: Melanie Biscoe/DC/USEPA/US@EPA**  **Date: 01/29/2009 03:21 PM**  **Subject: RE: Atrazine: Waiver for CWSs identified in MOA** 



### Melanie –
See the file attached.
Thanks!
Dan Ps – any word on date for CASM meeting? I looked at people’s schedules over the next few weeks, and we do have a few good days.

--------------------------------------------------- Dan Campbell Regulatory Affairs Team Lead, Herbicides Syngenta Crop Protection Office Telephone (336) 632-7627 Mobile Telephone (336) 509-5910From: Biscoe.Melanie@epamail.epa.gov [mailto:Biscoe.Melanie@epamail.epa.gov]

Sent: Thursday , January 29, 2009 12:00 PM To: Campbell Dan USGR Subject: Atrazine: Waiver for CWSs identified in MOA

Hi Dan, The attached transmittal document references an excel spreadsheet that I don't remember receiving. Could you email it today (if possible)?
Thanks, Melanie Biscoe C hemical Review Manager Special Review and Registration Division Office of Pesticide Programs biscoe.melanie@epa.gov 703-305-7106
This message may contain confidential information. If you are not the designated recipient, please notify the sender immediately ,

and delete the original and any copies. Any use of the message by you is prohibited

. **----- Forwarded by Melanie Biscoe/DC/USEPA/US on 12/20/2010 09:51 AM -----**
**From: "Suzanne Lazorko-Connon" <slazorkoconnon@shaw.ca>**  **To: Melanie Biscoe/DC/USEPA/US@EPA**  **Cc: Janet Bressant/DC/USEPA/US@EPA**  **Date: 02/10/2009 01:46 PM**  **Subject: RE: Atrazine Data: Clarifying Question** 

Hi Melanie: Below is the data I am requesting: 1). Atrazine concentration data in finished water for the systems listed below from 2000 to present. 2). I have the names of only 34 systems for which data is being requested (as extracted from the USEPA IRED on atrazine (Table 5 Section III)): Chariton, IA Sorento, IL Flora, IL W. Salem, IL Farina, IL White Hall, IL Carlinville, IL Gillespie, IL Hettick, IL Shipman, IL Palmyra-Modesto, ILN

. Otter Twp ADGPTV , IL

Kinmundy, IL Salem, IL Centralia, IL Hillsboro, IL Louisville, IL North Vernon, IN Omaha, IL Holland, IN Batesville, IN Scottsburg, IN Lewisburg, KY Marion, KY Iberville, LA Dearborn, MO Bucklin, MO Vandalia, MO Sardinia, OH Delaware, OH Clermont County, OH Williamsburg, OH Mt. Orab, OH Newark, OH Thank you for your time and help. Sincerely,
Suzanne Suzanne Lazorko-Connon slazorkoconnon@shaw.ca 403-932-9968
-----Original Message----- From: Biscoe.Melanie@epamail.epa.gov [mailto:Biscoe.Melanie@epamail.epa.gov] Sent: February 10, 2009 10:51 AM To: slazorkoconnon@shaw.ca Cc: Bressant.Janet@epamail.epa.gov Subject: Atrazine Data: Clarifying Question

Dear Suzanne, I just wanted to narrow down your specific data needs, so we can get the information to you sooner. (1) For which years do you want the data for the 37 Community Water Systems? (2) Do you actually have names of locations (or the names of the Community Water Systems), or not? (I can't remember from our communications on this) Thanks for clarifying these points, and I look forward to getting the data to you soon. Best Regards,Melanie Biscoe

Chemical Review Manager Special Review and Registration Division Office of Pesticide Programs biscoe.melanie@epa.gov 703-305-7106

**----- Forwarded by Melanie Biscoe/DC/USEPA/US on 12/20/2010 09:51 AM -----**
**From :**  **<dan.campbell@syngenta.com> To:**  **Melanie Biscoe/DC/USEPA/US@EPA Date:**  **02/09/2009 05:17 PM Subject:**  **FW: Mattoon Illinois CWS entered in to AMP based upon error in SDWA data**

<<Tables from Mattoon Ill 2006 SDWA calcs.doc>>


### Melanie

– Here are the tables, in word attachments.
Thanks
Dan

--------------------------------------------------- Dan Campbell Regulatory Affairs Team Lead, Herbicides Syngenta Crop Protection Office Telephone (336) 632-7627 Mobile Telephone (336) 509-5910

_____________________________________________ From: Campbell Dan USGR Sent: Thursday , January 29, 2009 6:45 AM To: Biscoe.Melanie@epamail.epa.gov Subject: Mattoon Illinois CWS entered in to AMP based upon error in SDWA data Hello Melanie - This message is to inform EPA of a Community Water System (CWS) that was added to the Atrazine Monitoring Program (AMP) in 2007 based upon an error in the Safe Drinking Water Act data that wereprovided to Syngenta, and to request that EPA agree to our cessation of monitoring of this CWS under

AMP. Recall that per the Atrazine Memorandum of Agreement (Appendix III, section 5 on page 26), Syngenta annually reviews all atrazine data collected by the states under the Safe Drinking Water Act and reports to EPA "...in writing, by April 1 of the following year, any CWS in which the average of the SDWA data for that year is at or greater than 2.6 ppb for TCT." For the year 2006 (as reported in 2007, MRID 47092902), Syngenta was provided the following data for Mattoon CWS in Illinois (IL0290250):

State CWS Name, PWSID Sample Collection Date Atrazine LOQ Atrazine Conc (ppb) Qrtrly A trazine Conc (ppb) 2006 Annual Avg Atrazine Conc (ppb) Calc’d TCT Conc (ppb) Qrtrly Calc’d T CT Conc (ppb) Calc’d 2006 Annual Avg TCT Conc (ppb) Is CWS Currently in AMP? Illinois Mattoon, IL0290250 6/30/2006 0.3 6.4 6.4 2.39 9.03 9.03 3.53 No 7/26/2006 0.3 1.1 0.63 2.00 1.19 8/22/2006 0.3 <LOQ 0.38 12/7/2006 0.3 <LOQ 0.15 0.38 0.37 We have since been alerted that the quarterly and annual averages, which are the basis for participation in AMP, were reported in error . Specifically, the 1.1 ppb atrazine sample reported for July 26, 2006 was actually a confirmation sample for the 6.4 ppb result from June 30, 2006 rather than a designated third quarter sample. It is our understanding that Illinois routinely takes a confirmatory sample when an individual sample concentration is greater than the Maximum Contamination Limit (please note that this does not signify a violation of an MCL, which is based upon the annual average concentration and not based upon individual sample values). Illinois EPA has corrected the record by designating the July 26 sample as a confirmatory sample for the June 30 sample, and provided us with a corrected quarterly average in the attached letter (January 21, 2009, Andrea Rhodes of the Illinois EPA to Ron Williams of Syngenta, attached below). <<IL EPA Letter for Mattoon.pdf>> Using the corrected quarterly averages provided by Illinois EPA, the new calculation results in an annual average of 2.03 ppb, well below the 2.6 ppb TCT trigger: 

### Corrected Calculation:
S ample Collection Date Atrazine LOQ (ppb) Atrazine Conc (ppb) Qrtly Atrazine Conc (ppb) 2006 Annual Avg Atrazine (ppb) Cal’d TCT Conc (ppb) Qrtrly Calc’d

TCT Conc (ppb) Calc’d 2006 Annual Avg TCT Conc (ppb) 6/30/06 0.3 6.4 3.75 1.35 9.03 5.34 2.03 7/26/06 0.3 1.1 1.64 8/22/06 0.3 <LOQ 0.15 0.38 0.38 12/7/06 0.3 <LOQ 0.15 0.37 0.37 As we learned of this difference only recently, the Mattoon Illinois CWS has been monitored in AMP in 2 007 and 2008, the results of which are attached. These two years of monitoring confirm that atrazine residues at Mattoon Illinois are not of concern, with annual averages ranging from 0.13 to 0.52 ppb. <<Jan-Oct 2008 AMP Mattoon IL Atrazine 1-14-09.pdf>> <<2007 AMP Mattoon IL Atrazine 1-14-09.pdf>> Since this CWS was entered into AMP based upon incorrect information, the record has been corrected by Illinois EPA, and two years of AMP monitoring has shown that atrazine is not of concern in the Mattoon Illinois system, Syngenta proposes to cease monitoring of this CWS under AMP. We will continue to compile, review and assess the state atrazine data from this CWS as part of our annual review of all SDWA data.We respectfully request that EPA review the provided information and reply as to whether you agree with

termination of monitoring under AMP at this specific CWS. It would be very helpful to receive a reply by February 13, 2009 so that we can work with the CWS in advance of the weekly monitoring period. Thank you for your help, and please call me if you need further information. Dan



### --------------------------------------------------- Dan Campbell Regulatory Affairs Team Lead , Herbicides Syngenta Crop Protection Office Telephone (336) 632-7627 Mobile Telephone (336) 509-5910

This message may contain confidential information. If you are not the designated recipient, please notify the sender immediately ,

and delete the original and any copies. Any use of the message by you is prohibited

.

**----- Forwarded by Melanie Biscoe/DC/USEPA/US on 12/20/2010 09:51 AM -----**
**From: "Suzanne Lazorko-Connon" <slazorkoconnon@shaw.ca>**  **To: Janet Bressant/DC/USEPA/US@EPA**  **Cc: Calvin Furlow/DC/USEPA/US@EPA, Melanie Biscoe/DC/USEPA/US@EPA**  **Date: 02/09/2009 12:10 PM**  **Subject: RE: Atrazine CWS Data Request** 

Hi Janet: I am following up to my data request as I have not yet heard back on its status. Do you have an idea of the timeline to receive the data? Thank you for your time and help. Sincerely,
Suzanne Suzanne Lazorko-Connon slazorkoconnon@shaw.ca 403-932-9968 -----Original Message----- From: Bressant.Janet@epamail.epa.gov[ mailto : Bressant

. Janet @ epamail

. epa . gov ]

Sent: January 26, 2009 5:09 AM To: slazorkoconnon@shaw.ca Cc: Furlow.Calvin@epamail.epa.gov; Biscoe.Melanie@epamail.epa.gov Subject: Fw: Atrazine CWS Data Request: Suzanne Lazorko Email Address

Dear Ms. Lazorko-Connon: The FOIA Office in the Office of Pesticide Programs has been made aware of your request for Atrazine CWS Data. I will be in further contact with you once I receive the responsive data from Melanie Biscoe. I am scheduled to be in training today through Wednesday, January 28th, however, I will be checking my email messages during that time. If you have any questions, please feel free to contact me.
Janet Bressant Public Information and Records Integrity Branch Information Technology and Resources Management Division Office of Pesticide Programs Phone: (703) 305-6445 Fax: (703) 305-5480 Email: bressant.janet@epa.gov Visit OPP's new FOIA Website: http://www.epa.gov/pesticides/foia/ ----- Forwarded by Janet Bressant/DC/USEPA/US on 01/26/2009 06:58 AM

----- Melanie Biscoe/DC/USEPA/ US To Janet Bressant/DC/USEPA/US@EPA 01/23/2009 05:55 cc PM Subject Atrazine CWS Data Request: Suzanne Lazorko Email Address

Janet, Per our conversation earlier this week, here is Suzanne Lazorko's email address. I'm working with EFED to get the data ready for you. Just let me know if you need anything else. Thanks, Melanie Biscoe Chemical Review ManagerSpecial Review and Registration Division

Office of Pesticide Programs biscoe.melanie@epa.gov 703-305-7106
----- Forwarded by Melanie Biscoe/DC/USEPA/US on 01/23/2009 05:53 PM

----- "Suzanne Lazorko-Connon" <slazorkoconnon@ To shaw.ca> Melanie Biscoe/DC/USEPA/US@EPA cc 01/23/2009 05:51 PM Subject My Email Address

Hi Melanie: Thank you for your voice message regarding obtaining the data on atrazine concentrations in finished water. (I obtained your email address from the on-line USEPA staff locator tool). Below is my email address:
slazorkoconnon@shaw.ca I understand that the FOIA office will be contacting me shortly so that I can formally make the data request. Thank you for your time and help. Sincerely,
Suzanne Suzanne Lazorko-Connon slazorkoconnon@shaw.ca 403-932-9968

**----- Forwarded by Melanie Biscoe/DC/USEPA/US on 12/20/2010 09:51 AM -----**
**From :**  **<dan.campbell@syngenta.com> To:**  **Melanie Biscoe/DC/USEPA/US@EPA Date:**  **03/05/2009 05:58 PM Subject:**  **RE: Triazines: Follow-up from today's CWS call**

### OK, thanks Melanie.

Thank you also for the productive call – we will get back as soon as possible on the questions .
Dan

--------------------------------------------------- Dan Campbell Regulatory Affairs Team Lead, Herbicides Syngenta Crop Protection Office Telephone (336) 632-7627 Mobile Telephone (336) 509-5910
From: Biscoe.Melanie@epamail.epa.gov [mailto:Biscoe.Melanie@epamail.epa.gov] Sent: Thursday , March 05, 2009 2:35 PM To: Campbell Dan USGR Subject: Triazines : Follow-up from today's CWS call

Dan,
Centralia Water Treatment Plant is the CWS that i left out of the spreadsheet -- the MOEs indicate that TCT residues drop substantially from 2002 to 2004, and then increase again in 2006 and 2007. If there's anything obvious that explains this, please let us know. Thanks-- and thanks for a productive call today.

Best Regards, Melanie Biscoe C hemical Review Manager Special Review and Registration Division Office of Pesticide Programs biscoe.melanie@epa.gov 703-305-7106
This message may contain confidential information. If you are not the designated recipient, please notify the sender immediately , and delete the original and any copies. Any use of the message by you is prohibited

. **----- Forwarded by Melanie Biscoe/DC/USEPA/US on 12/20/2010 09:51 AM -----**
**From :**  **<dan.campbell@syngenta.com> To:**  **Melanie Biscoe/DC/USEPA/US@EPA Date:**  **03/10/2009 05:46 PM Subject:**  **RE: FYI on Triazine AMP**


### Melanie – thanks for the teaser! We are still working away at the questions – hope to get you something tomorrow. I truly appreciate all the work you and HED are doing on this project.

### Dan

--------------------------------------------------- Dan Campbell Regulatory Affairs Team Lead, Herbicides Syngenta Crop Protection Office Telephone (336) 632-7627 Mobile Telephone (336) 509-5910
From: Biscoe.Melanie@epamail.epa.gov [mailto:Biscoe.Melanie@epamail.epa.gov] Sent: Tuesday , March 10, 2009 11:48 AM To: Campbell Dan USGR Subject: FYI on Triazine AMP

Dan, Just as a heads up, I think we're going to have a few rounds of decommissioning even for the Mid-March ti meframe. The first round on systems we don't have questions about, the second round on systems we do have questions about or that we want to discuss a bit further. That's your Triazine Teaser of the day!
Melanie Biscoe C hemical Review Manager Special Review and Registration Division Office of Pesticide Programs biscoe.melanie@epa.gov 703-305-7106
This message may contain confidential information. If you are not the designated recipient, please notify the sender immediately , and delete the original and any copies. Any use of the message by you is prohibited

. **----- Forwarded by Melanie Biscoe/DC/USEPA/US on 12/20/2010 09:51 AM -----**
**From :**  **<dan.campbell@syngenta.com> To:**  **Melanie Biscoe/DC/USEPA/US@EPA Date:**  **03/31/2009 05:46 PM Subject:**  **RE: Decommissioned!**


### Melanie - thank you for this great news, and for all your work on this! I’ll give you a call tomorrow.
Thanks!!!! Dan

--------------------------------------------------- Dan Campbell Regulatory Affairs Team Lead, Herbicides Syngenta Crop Protection

### Office Telephone (336) 632-7627

Mobile Telephone (336) 509-5910
From: Biscoe.Melanie@epamail.epa.gov [mailto:Biscoe.Melanie@epamail.epa.gov] Sent: Tuesday , March 31, 2009 5:26 PM To: Campbell Dan USGR Subject: Decommissioned! Importance: High

Dear Dan, Congratulations! 31 CWS have been decommissioned from the AMP effective today. I'll follow up on this email with formal correspondence.
Melanie Biscoe C hemical Review Manager Special Review and Registration Division Office of Pesticide Programs biscoe.melanie@epa.gov 703-305-7106This message may contain confidential information. If you are not the designated recipient, please notify the sender immediately , and delete the original and any copies. Any use of the message by you is prohibited

. **----- Forwarded by Melanie Biscoe/DC/USEPA/US on 12/20/2010 09:51 AM -----**
**From :**  **<dan.campbell@syngenta.com> To:**  **Melanie Biscoe/DC/USEPA/US@EPA Date:**  **04/01/2009 03:34 PM Subject:**  **SMP - Patoka IL CWS started purchasing July -31-2006**



### Melanie – Patoka IL was taken off-line July 31, 2006. This was reported in MRID # 47045601. See the notification letter from the CWS Operator we included in the report (page 45 extracted and enclosed).
Thanks
Dan

### ---------------------------------------------------

Dan Campbell Regulatory Affairs Team Lead, Herbicides Syngenta Crop Protection Office Telephone (336) 632-7627 Mobile Telephone (336) 509-5910 <<Patoka IL - Page 45 from 2006 SMP Rpt T013958-05.pdf>>

This message may contain confidential information. If you are not the designated recipient, please notify the sender immediately , and delete the original and any copies. Any use of the message by you is prohibited

.

**----- Forwarded by Melanie Biscoe/DC/USEPA/US on 12/20/2010 09:51 AM -----**
**From: <dan.campbell@syngenta.com>**  **To: Melanie Biscoe/DC/USEPA/US@EPA**  **Date: 04/01/2009 12:54 PM**  **Subject: RE: Triazines: Piqua CWS Finished Water** 



### Melanie – enclosed are two spreadsheets: “piqua OH5501211 finished water data only 2003-2008.xls” – all data values, finished water only for all years to end of 2008. “Piqua OH Fin 90DRA TCT+SIM 4-1-09.xls” – our calculation of 90-day rolling averages from the finished water data from 2003-2008 (note that we used the regressed IA data, so it is not exactly how you have been doing this for the early years).
Thanks Dan

--------------------------------------------------- Dan Campbell Regulatory Affairs Team Lead, Herbicides Syngenta Crop Protection Office Telephone (336) 632-7627 Mobile Telephone (336) 509-5910
From: Biscoe.Melanie@epamail.epa.gov [mailto:Biscoe.Melanie@epamail.epa.gov] Sent: Tuesday , March 31, 2009 5:34 PMTo : Campbell Dan USGR

Subject: Triazines : Piqua CWS Finished Water Importance: High

Dan, I compared notes with Mary today, and we are having a little difficulty sorting out which data represent f inished versus raw water for Piqua. Would you all be able to pick out JUST finished water data for 2003-2007 for Piqua and send it to us? T omorrow? :-)
Just let me know-- we 're trying to get a briefing for management together, and want to know where Piqua stands so we don't overstate the risk...

Thanks, Melanie Biscoe C hemical Review Manager Special Review and Registration Division Office of Pesticide Programs biscoe.melanie@epa.gov 703-305-7106
This message may contain confidential information. If you are not the designated recipient, please notify the sender immediately ,

and delete the original and any copies. Any use of the message by you is prohibited

.

**----- Forwarded by Melanie Biscoe/DC/USEPA/US on 12/20/2010 09:51 AM -----**
**From: <dan.campbell@syngenta.com>**  **To: Melanie Biscoe/DC/USEPA/US@EPA**  **Date: 04/17/2009 12:32 PM**  **Subject: EPA CWS Questions of February 2009 - Syngenta responses** 



### Dear MelanieSee enclosed our responses to your questions in the e-mail titled “Triazines: Questions on CWSs” of February 27, 2009. Thank you for your help with these CWS waivers, and please let me know if you need more information. Thanks, and have a great weekend, Dan

This message may contain confidential information. If you are not the designated recipient, please notify the sender immediately ,and delete the original and any copies. Any use of the message by you is prohibited

.

**----- Forwarded by Melanie Biscoe/DC/USEPA/US on 12/20/2010 09:51 AM -----**
**From: "Sass, Jennifer" <**  **jsass @nrdc.org>**  **To: Debbie Edwards/DC/USEPA/US@EPA, Margie Fehrenbach/DC/USEPA/US@EPA**  **Cc: Melanie Biscoe/DC/USEPA/US@EPA, "Quirindongo, Mayra" <MQuirindongo@nrdc.org>, "Wu,** 

**Mae" <mwu@nrdc.org>**  **Date: 04/15/2009 01:56 PM**  **Subject: NRDC FOIA for atrazine monitoring data** 
Dear Debbie, Margie, and Melanie, I just wanted to let you know that we just submitted this FOIA request for the datasets from the atrazine monitoring programs. I submitted the request using the online form, but accidentally messed up the first request (only asked for 2 007 and 2008 data), so I submitted this attached second request with the proper years specified. I will explain my mistake to the FOIA officer when they contact me. best wishes, jen

Jennifer Sass, Ph.D. Natural Resources Defense Council 1200 New York Avenue NW , Suite 400 Washington, DC 20005 Email: jsass @ nrdc

. org Tel: 202 289 6868 blog: http :// switchboard

. nrdc

. org / blogs / jsass /

" T he quality of a lifetime and the depth of love are not measurable solely in terms of quantity -- I wish that every day that remains to you be rich and full." - Shelley Davis

NRDC advocates for disclosure of information , regard for scientific inquiry and facts, justice for disempowered people, honesty by government, and corporate accountability. ( www
. nrdc

. org )

**----- Forwarded by Melanie Biscoe/DC/USEPA/US on 12/20/2010 09:51 AM -----**
**From: "Suzanne Lazorko-Connon" <slazorkoconnon@shaw.ca>**  **To: Melanie Biscoe/DC/USEPA/US@EPA**  **Date: 04/27/2009 05:48 PM**  **Subject: RE: Atrazine Data Request: Email 2 of 2** 

Hi Melanie: Thank you for the time and effort you took at getting me this data. Upon review, I am assuming that the concentrations for all the years provided is in ppb (the latter years' data have the units included on the worksheet, however, some of the earlier years do not). Also could you explain what the following headers stand for:G-28273

G-28279 G-30033 Thanks. Sincerely,
Suzanne Suzanne Lazorko-Connon slazorkoconnon@shaw.ca 403-932-9968

-----Original Message----- From: Biscoe.Melanie@epamail.epa.gov [mailto:Biscoe.Melanie@epamail.epa.gov] Sent: March 17, 2009 3:41 PM To: slazorkoconnon@shaw.ca Cc: Bressant.Janet@epamail.epa.gov Subject: Atrazine Data Request: Email 2 of 2

Dear Suzanne, Attached are the remaining AMP data files. Melanie Biscoe Chemical Review Manager Special Review and Registration Division Office of Pesticide Programs biscoe.melanie@epa.gov 703-305-7106 (See attached file: 2006AMP-w-sim-TCT.xls)(See attached file: 2007AMP-SMP-w-TCT.xls)(See attached file: 2008AMP-w-sim-TCT.xls)(See attached file: 2008SMP-w-atz-TCT.xls)

**----- Forwarded by Melanie Biscoe/DC/USEPA/US on 12/20/2010 09:51 AM -----**
**From :**  **n.d. jablonowski**  **@daad-alumni.de To:**  **Tracy Perry/DC/USEPA/US@EPA, Mark Corbin/DC/USEPA/US@EPA, Melanie**

**Biscoe/ DC/USEPA/US@EPA, p.burauel@fz-**  **juelich .de, n.d.**  **jablonowski @fz-**  **juelich .de**  **Date: 04/26/2009 10:47 AM**  **Subject: Re: Atrazine long-term persistence; Telephone converstaion with German PhD-student** 

Dear Melanie, dear all, referring to previous correspondence to Tracy Perry I do reply to all, sending you my best regards from Germany and some recent data of my ongoing work about atrazine that might be of your interest. The attached paper was published online in Environmental Pollution in March this year, highlighting the long-term persistence of atrazine in surface and subsurface soils, the poster with the latest findings waspresented at the EGU meeting in Vienna last week , highlighting the

persistence of atrazine and all possible metabolites in deeper layers (55-60cm depth, in a drainage system of a long-term outdoor lysimeter used for agricultural purposes). Further I have the following questions, and I hope that you might provide some clarifying information: Are there regular atrazine monitoring programs in the US? If yes: who are the involved parties? Who is monitoring atrazine in ground-/drink-/surface-waters? How often and how (technically) is monitoring performed? I would be glad if you provide some information concerning that matter since I try to get an overview of atrazine monitoring worldwide within my PhD-research and activities. Thank you very much in advance. Best regards. Sincerely, Yours Nicolai David Jablonowski
p.s.: for future correspondence please also use contact information below:

-------------------------------------- Nicolai D. Jablonowski Institute of Chemistry and Dynamics of the Geosphere, ICG-4 ? Agrosphere, Forschungszentrum Juelich GmbH D - 52425 Juelich

-------------------------------------- Phone +49-2461-61-2696 Fax -2518 e-mail: n.d.jablonowski@fz-juelich.de web: http://www.fz-juelich.de

--------------------------------------

Zitat von Perry.Tracy@epamail.epa.gov: > Dear Nicolai, > > Thank you for sharing your poster, and we look forward to receiving your > paper. For future reference, Melanie Biscoe (copied on this email) has > taken over as the Chemical Review Manager for atrazine. I have moved on > to a new position and am responsible for a new set of chemicals. > > Good luck with your work, and happy holidays to you too! > > Tracy > > Tracy L. Perry > U.S. Environmental Protection Agency > Office of Pesticide Programs > (703) 308-0128 > (703) 308-8005 (FAX) > perry.tracy@epa.gov > > > > > n.d.jablonowski@ > daad-alumni.de> To

> 12/06/2008 01:47 Tracy Perry/DC/USEPA/US@EPA > PM cc > Mark Corbin/DC/USEPA/US@EPA > Subject > Re: Atrazine long-term > persistence; Telephone > converstaion with German > PhD-student > > > > > > > > > > > Dear Tracy, > > while being in the states, working at the Connecticut Agricultural > Experiment Station and Yale University I contacted you via phone > concerning my PhD-work and my findings about the long-term persistence > of atrazine. > Since I had the opportunity to present my first results at the SETAC > conference in Tampa two weeks ago, I thought that the poster might be > of your interest (attached as pdf). My manuscript concerning this > issue is currently under review; I will forward it to you as soon as > it will be published. > Best regards and have a great christmas time. > > Nicolai > > > > > Zitat von Perry.Tracy@epamail.epa.gov: > >> Dear Nicolai, >> >> Thank you for your email. I tried to send you the atrazine links > below >> about 10 days ago, but the address you provided did not work (and I >> could not find your phone number in the mess on my desk!). Regarding >> your work on atrazine residues in soil, please contact Mark Corbin, > who >> is a senior scientist in OPP's Environmental Fate and Effects > Division. >> His email is corbin.mark@epa.gov and phone number is 703-605-0033. >> >> Please also see the links below to the Agency's White Paper on the >> potential effects of atrazine on amphibian gonadal development and the >> FIFRA Scientific Advisory Panel's report on this subject.!). >> >> Tracy >> >> White Paper and charge to Panel >> > http://www.epa.gov/scipoly/sap/meetings/2007/october/2007_amphibian_white_paper . pdf

> >> >> > http://www.epa.gov/scipoly/sap/meetings/2007/october/charge_to_the_panel.pdf

> >> >> SAP report. >> http://www.epa.gov/scipoly/sap/meetings/2007/october/finalminutes.pdf
>> >> >> >> >> >> n.d.jablonowski@ >> daad-alumni.de >> > To >> 10/17/2008 11:06 Tracy Perry/DC/USEPA/US@EPA >> AM > cc >> >> > Subject >> Atrazine long-term persistence; >> Telephone converstaion with >> German PhD-student >> >> >> >> >> >> >> >> >> >> >> Dear Ms. Perry, >> >> I highly appreciated our conversation via telephone about atrazine, >> approximately two weeks ago, where you gave me some good information >> about atrazine reregistration and monitoring in the US. >> As I told you about my ongoing work I can still find >> (14C-/12C-labeled) atrazine by means of LC-MS/MS. This amounts to 1 >> mikrogramm/kg soil of parent compound and 43 mikrogramm/kg of its >> metabolite hydroxyatrazine which is extractable from the soil from the >> top 10 cm layer. In the lowest lysimeter increment (fine gravel, 55-60 >> cm), the amount of atrazine is even four times higher than in the >> surface soil, which might indicate its long-term persistence in deeper >> soil layers and its continuous leaching character over time. The last >> atrazine application on the lysimeter soil was performed in 1985. For >> the time of the experiment, the soil was used for agricultural >> purposes (corn plantations) under outdoor conditions, until the end of >> 2005. >> Since I am planning to publish these data I would be glad if you could >> provide me some further information on the environmental, or even >> health impact of atrazine/hydroxyatrazine. Data and information on the >> current "situation" of this herbicide in the US, and how it is being >> discussed in terms of environmental policy issues would be highly >> appreciated.>> If this work might attract your attention I would also be glad to

>> present my data personally. >> I would be grateful if you could provide some further information. >> Thank you very much in advance. >> Sincerely, >> Yours >> >> Nicolai Jablonowski >> >> >> >> > > > (See attached file: Poster_SETAC_2008_Endversion.ppt_jablonowski.pdf)

**----- Forwarded by Melanie Biscoe/DC/USEPA/US on 12/20/2010 09:51 AM -----**
**From: Rashmi Sahai <rashusahai@gmail.com>**  **To: Melanie Biscoe/DC/USEPA/US@EPA, Helen Sok <helen@swape.com>**  **Date: 05/15/2009 03:11 PM**  **Subject: Re: Atrazine: Your Request for Data from the Atrazine Monitoring Program** 

Hi Melanie, I wanted to let you know that I will be out of the country for the next 6 months and will be transferring my Atrazine project to my colleague, Helen Sok. Her contact information is: phone:310-892-3040 email: helen@swape.com. Please send all remaining Syngenta Atrazine data and reports to Helen. Thanks You! Rashmi Sahai Environmental Engineer SWAPE 818 419 5127 rashusahai@gmail.com
On Mon, Apr 13, 2009 at 10:31 AM, <Biscoe.Melanie@epamail.epa.gov> wrote: > Hi Rashmi, > > I'll make a note of this request for when I put the other elements of > the FOIA package together. > > Best Regards, > > Melanie Biscoe > Chemical Review Manager > Special Review and Registration Division > Office of Pesticide Programs > biscoe.melanie@epa.gov > 703-305-7106>

> > > > > From: Rashmi Sahai <rashusahai@gmail.com> > > To: Melanie Biscoe/DC/USEPA/US@EPA
> > Date: 04/13/2009 01:14 PM
> > Subject: Re: Atrazine: Your Request for Data from the Atrazine Monitoring Program > > > > > > > Dear Melanie, > > Is it possible to get the reports that Syngenta put together on the data > that you sent me? We already have Syngenta's report for 2003. > > Thanks! > > Rashmi Sahai > Environmental Engineer > SWAPE > 310 920 6169 > rashusahai@gmail.com > > On Fri, Apr 10, 2009 at 9:58 AM, <Biscoe.Melanie@epamail.epa.gov> wrote: > Dear Rashmi, > > Attached are the files we have from the Atrazine Monitoring Program > for > Community Water Systems for the official years of the program, 2003 > through 2008. > > Years 2003 and 2004 do not contain simazine data. The remaining years > (from the latter half of 2005 on) contain data for all triazine > residues. > > These files contain the results for all of the 120+ to 140+ Community > Water Systems that were monitored over the 6-year period. The request > for data covered 34 systems. For 10-12 of these systems listed below, > there were little to no data submitted after 2003. This is because > (in > a rare case or two) they did not agree to enter the monitoring program > or because they began purchasing water from another neighboring > Community Water Systems. The systems in this request for which we > have > little to no Atrazine Monitoring Program data are the following: > > Sorento, IL; White Hall, IL; Hettick, IL; Shipman, IL; Louisville, IL; > Omaha, IL; Holland, IN; Scottsburg, IN; Sardinia, OH; Clermont Co, OH; > and Williamsburg, OH > > The attached files contain data for the remaining systems in the > request> as well as for all Community Water Systems which entered the Atrazine

> Monitoring Program in 2003 and subsequent years. > > I'm currently working on collecting the additional data you requested, > and can hopefully provide it to you within the next two weeks. > > Best Regards, > > Melanie Biscoe > Chemical Review Manager > Special Review and Registration Division > Office of Pesticide Programs > biscoe.melanie@epa.gov > 703-305-7106 > > (See attached file: 2003AMPData--no simazine.xls)(See attached file: > 2004AMPData-no simazine.xls)(See attached file: 2005 AMP > data-w-simazine.xls)(See attached file: 2006AMP-w-sim-TCT.xls)(See > attached file: 2007AMP-SMP-w-TCT.xls)(See attached file: > 2008AMP-w-sim-TCT.xls) > (See attached file: 2008SMP-w-atz-TCT.xls) > > > > **----- Forwarded by Melanie Biscoe/DC/USEPA/US on 12/20/2010 09:51 AM -----**
**From :**  **Alan Roberson <ARoberson@awwa.org> To:**  **Melanie Biscoe/DC/USEPA/US@EPA Date:**  **10/22/2009 03:42 PM Subject:**  **Re: AWWA Comments to EPA FIFRA SAP**

Thanks. My apologies for the typo and I will check my calendar. I have 3 trips stacked up in Nov so I need to look at my calendar carefully. Alan ----- Original Message ----- From: Biscoe.Melanie@epamail.epa.gov <Biscoe.Melanie@epamail.epa.gov> To: Alan Roberson Sent: Thu Oct 22 13:32:21 2009 Subject: Re: AWWA Comments to EPA FIFRA SAP

Alan,
Thanks very much for sending AWWA's comments on atrazine to the SAP docket. We appreciate the time you spend on examining the atrazine issue. Bob McNally indicated that you'd like to meet with OPP sometime in November. Just let me know what days/times work for you, and I'll put it on our calendars. I look forward to meeting you soon. FYI I didn't receive your email with the attached comments directly because of an email typo - my email is biscoe.melanie@epa.gov (there is actually no "r" in my name, although people occasionally slip one in- no offense taken!)Best Regards ,

Melanie Biscoe Chemical Review Manager Risk Management and Implementation Branch IV (RMIB IV) Pesticide Re-evaluation Division (PRD) Office of Pesticide Programs (OPP) biscoe.melanie@epa.gov 703-305-7106
From: Alan Roberson <ARoberson@awwa.org> To: Peter Silva/DC/USEPA/US@EPA, Steve Owens/DC/USEPA/US@EPA, Robert Mcnally/DC/USEPA/US@EPA, "briscoe.melanie@epa.gov" <briscoe.melanie@epa.gov>, Cynthia Dougherty/DC/USEPA/US@EPA, Pamela Barr/DC/USEPA/US@EPA, Edward Ohanian/DC/USEPA/US@EPA Date: 10/22/2009 02:19 PM Subject: AWWA Comments to EPA FIFRA SAP

Enclosed are comments by the American Water Works Association (AWWA) that were submitted to the Docket today for the upcoming Nov. 3 FIFRA SAP meeting on the atrazine evaluation. J. Alan Roberson, P.E. Director of Security and Regulatory Affairs American Water Works Association 1300 Eye Street NW, #701W Washington, DC 20005 Main Phone: (202) 628-8303 Direct: (202) 326-6127 Fax: (202) 628-2846 Email: aroberson@awwa.org (See attached file: Atrazine SAP Evaluation JAR 102209.pdf)

________________________________________________________________________ This email has been scanned for all viruses by the MessageLabs SkyScan service.

________________________________________________________________________ **----- Forwarded by Melanie Biscoe/DC/USEPA/US on 12/20/2010 09:51 AM -----**
**From :**  **"Suzanne Lazorko-Connon" <slazorkoconnon@shaw.ca> To:**  **Melanie Biscoe/DC/USEPA/US@EPA Cc:**  **Janet Bressant/DC/USEPA/US@EPA Date:**  **03/10/2009 09:45 AM Subject:**  **RE: Atrazine Data Update**

Good morning Melanie:I have not yet receive an update on the data retrieval

- from your email

a couple of weeks ago, you were hoping to send me the update by Feb. 20 on how it was progressing. Please provide a timeline by which I may receive this data. I appreciate your time and help in getting this information to me. Thank you. Sincerely,
Suzanne Suzanne Lazorko-Connon slazorkoconnon@shaw.ca 403-932-9968
-----Original Message----- From: Biscoe.Melanie@epamail.epa.gov [mailto:Biscoe.Melanie@epamail.epa.gov] Sent: February 17, 2009 12:30 PM To: Suzanne Lazorko-Connon Cc: Bressant.Janet@epamail.epa.gov Subject: Atrazine Data Update

Hi Suzanne-- We're getting there, slowly but surely! We're still working on getting your data all together for you. I'll let you know how things are progressing at the end of this week. Also, we're interested in the thesis topic, and what the findings were. If you're allowed to share, we always welcome new information or analyses from external sources. Best Regards, Melanie Biscoe Chemical Review Manager Special Review and Registration Division Office of Pesticide Programs biscoe.melanie@epa.gov 703-305-7106

**----- Forwarded by Melanie Biscoe/DC/USEPA/US on 12/20/2010 09:51 AM -----**
**From :**  **Alan Roberson <ARoberson@awwa.org> To:**  **Melanie Biscoe/DC/USEPA/US@EPA Date:**  **10/08/2009 01:38 PM Subject:**  **atrazine**
Melanie, I also left you a voicemail as I would like to chat a bit about yesterday’s press release on atrazineand in particular, the part at the end that says:

“EPA plans to meet with interested groups to explore better ways to inform the public more quickly about the results of atrazine drinking water monitoring”. I also left a voicemail for Bob McNally. Alan J. Alan Roberson, P.E. Director of Security and Regulatory Affairs American Water Works Association 1300 Eye Street NW, #701W Washington, DC 20005 Main Phone: (202) 628-8303 Direct: (202) 326-6127 Fax: (202) 628-2846 Email: aroberson @ awwa

. org

**----- Forwarded by Melanie Biscoe/DC/USEPA/US on 12/20/2010 09:51 AM -----**
**From :**  **<dan.campbell@syngenta.com> To:**  **Melanie Biscoe/DC/USEPA/US@EPA Date:**  **01/29/2009 06:45 AM Subject:**  **Mattoon Illinois CWS entered in to AMP based upon error in SDWA data**

Hello Melanie - This message is to inform EPA of a Community Water System (CWS) that was added to the Atrazine Monitoring Program (AMP) in 2007 based upon an error in the Safe Drinking Water Act data that were provided to Syngenta, and to request that EPA agree to our cessation of monitoring of this CWS under AMP. Recall that per the Atrazine Memorandum of Agreement (Appendix III, section 5 on page 26), Syngenta annually reviews all atrazine data collected by the states under the Safe Drinking Water Act and reports to EPA "...in writing, by April 1 of the following year, any CWS in which the average of the SDWA data for that year is at or greater than 2.6 ppb for TCT." For the year 2006 (as reported in 2007, MRID 47092902), Syngenta was provided the following data for Mattoon CWS in Illinois (IL0290250):

State CWS Name, PWSID Sample Collection Date Atrazine LOQ Atrazine Conc (ppb) Qrtrly A trazine Conc (ppb) 2006 Annual Avg Atrazine Conc (ppb) Calc’d TCT Conc (ppb) Qrtrly Calc’d T CT Conc (ppb) Calc’d 2006 Annual Avg TCT Conc (ppb) Is CWS Currently in AMP? Illinois Mattoon, IL0290250 6/30/2006 0.3 6.4 6.4 2.39 9.03 9.03 3.53 No 7/26/2006 0.3 1.1 0.63 2.00 1.19 8/22/2006 0.3 <LOQ 0.38 12/7/2006 0.3 <LOQ 0.15 0.38 0.37 We have since been alerted that the quarterly and annual averages, which are the basis for participation in AMP, were reported in error . Specifically, the 1.1 ppb atrazine sample reported for July 26, 2006 was actually a confirmation sample for the 6.4 ppb result from June 30, 2006 rather than a designated third quarter sample. It is our understanding that Illinois routinely takes a confirmatory sample when an individual sample concentration is greater than the Maximum Contamination Limit (please note that this does not signify a violation of an MCL, which is based upon the annual average concentration and not based upon individual sample values). Illinois EPA has corrected the record by designating the July 26 sample as a confirmatory sample for the June 30 sample, and provided us with a corrected quarterly average in the attached letter (January 21, 2009, Andrea Rhodes of the Illinois EPA to Ron Williams of Syngenta, attached below).<<IL EPA Letter for Mattoon.pdf>>

Using the corrected quarterly averages provided by Illinois EPA, the new calculation results in an annual average of 2.03 ppb, well below the 2.6 ppb TCT trigger: 

### Corrected Calculation:
S ample Collection Date Atrazine LOQ (ppb) Atrazine Conc (ppb) Qrtly Atrazine Conc (ppb) 2006 Annual Avg Atrazine (ppb) Cal’d TCT Conc (ppb) Qrtrly Calc’d

TCT Conc (ppb) Calc’d 2006 Annual Avg TCT Conc (ppb) 6/30/06 0.3 6.4 3.75 1.35 9.03 5.34 2.03 7/26/06 0.3 1.1 1.64 8/22/06 0.3 <LOQ 0.15 0.38 0.38 12/7/06 0.3 <LOQ 0.15 0.37 0.37 As we learned of this difference only recently, the Mattoon Illinois CWS has been monitored in AMP in 2 007 and 2008, the results of which are attached. These two years of monitoring confirm that atrazine residues at Mattoon Illinois are not of concern, with annual averages ranging from 0.13 to 0.52 ppb. <<Jan-Oct 2008 AMP Mattoon IL Atrazine 1-14-09.pdf>> <<2007 AMP Mattoon IL Atrazine 1-14-09.pdf>> Since this CWS was entered into AMP based upon incorrect information, the record has been corrected by Illinois EPA, and two years of AMP monitoring has shown that atrazine is not of concern in the Mattoon Illinois system, Syngenta proposes to cease monitoring of this CWS under AMP. We will continue to compile, review and assess the state atrazine data from this CWS as part of our annual review of all SDWA data. We respectfully request that EPA review the provided information and reply as to whether you agree with termination of monitoring under AMP at this specific CWS. It would be very helpful to receive a reply by February 13, 2009 so that we can work with the CWS in advance of the weekly monitoring period

. Thank you for your help, and please call me if you need further information. Dan



### --------------------------------------------------- Dan Campbell Regulatory Affairs Team Lead , Herbicides Syngenta Crop Protection Office Telephone (336) 632-7627 Mobile Telephone (336) 509-5910

This message may contain confidential information. If you are not the designated recipient, please notify the sender immediately ,and delete the original and any copies. Any use of the message by you is prohibited

.

**----- Forwarded by Melanie Biscoe/DC/USEPA/US on 12/20/2010 09:51 AM -----**
**From: "Joe Burley" <**  **jburley @sipcamadvan.com>**  **To: Melanie Biscoe/DC/USEPA/US@EPA**  **Date: 10/15/2009 04:37 PM**  **Subject: RE: Atrazine Meeting at EPA - MOA Modifications** 

Thank you Melanie, I will attend the meeting on behalf of Oxon. Regards
Joe Joseph W. Burley Ph.D. Regulatory Manager SipcamAdvan 2520 Meridian Parkway, Suite 525 Durham, NC 27713 Office (919) 226 1297 Cell (609) 598 1403 www.sipcamadvan.com This message is a PRIVATE AND CONFIDENTIAL communication. If you are not the intended recipient, please do not read, copy, or use it, and do not disclose it to others. Please notify the sender of the delivery error by replying to this message, and then delete it from your system. Thank you.
-----Original Message----- From: Biscoe.Melanie@epamail.epa.gov [mailto:Biscoe.Melanie@epamail.epa.gov] Sent: Thursday, October 15, 2009 3:40 PM To: Joe Burley Subject: Fw: Atrazine Meeting at EPA - MOA Modifications

Hi Joe,
I had a different email address for you - sorry for the error. Below is the invite to the meeting on the atrazine MOA. I'm also extending this meeting until 4:30, so will re-send the invite.
Best Regards, Melanie Biscoe Chemical Review Manager Risk Management and Implementation Branch IV (RMIB IV) Pesticide Re-evaluation Division (PRD) Office of Pesticide Programs (OPP)biscoe

. melanie @ epa . gov

703-305-7106
----- Forwarded by Melanie Biscoe/DC/USEPA/US on 10/15/2009 03:38 PM

----- From: Melanie Biscoe/DC/USEPA/US To: dan.campbell@syngenta.com, lchan@drexchem.com, jburley@sipcamagrousa.com, ephi@manainc.com Date: 10/13/2009 05:28 PM Subject: Atrazine Meeting at EPA - MOA Modifications

Dear Atrazine Technical Registrants,
You are invited to attend a meeting with EPA to discuss potential modifications to the Atrazine Memorandum of Agreement on Monday, October 26, from 2:30-3:30 PM at the Potomac Yard OPP offices. In preparation for the meeting, please let me know: (1) if anyone has been inadvertently omitted from this invitation - please let me know who they are, and provide an email and phone contact for that individual. (2) who you expect will represent your company at this meeting.
Thanks and I look forward to hearing from you. Best Regards, Melanie Biscoe Chemical Review Manager Risk Management and Implementation Branch IV (RMIB IV) Pesticide Re-evaluation Division (PRD) Office of Pesticide Programs (OPP) biscoe.melanie@epa.gov 703-305-7106
**----- Forwarded by Melanie Biscoe/DC/USEPA/US on 12/20/2010 09:51 AM -----**
**From :**  **Alan Roberson <ARoberson@awwa.org> To:**  **Melanie Biscoe/DC/USEPA/US@EPA Cc:**  **Robert Mcnally/DC/USEPA/US@EPA, Steve Via <SVia@awwa.org> Date:**  **10/23/2009 11:15 AM Subject:**  **RE: AWWA Comments to EPA FIFRA SAP**

Melanie, I took a look at my November calendar and I have several mornings open: Thursday November 12Friday November 13

Friday November 20 Monday November 23 Tuesday November 24 I would assume I would come over to OPP and I think you guys have moved further south in Crystal City, right? I did feel out a few folks about how to shorten the timeframe of getting the monitoring results to the public and nobody has any problem with getting the Syngenta results out faster. But there was considerable concern about revising either Consumer Confidence Report or Public Notification Rule and making some sort of special requirement for atrazine. I will broaden my circle to see if I can come up with any creative suggestions. Alan J. Alan Roberson, P.E. Director of Security and Regulatory Affairs American Water Works Association 1300 Eye Street NW, #701W Washington, DC 20005 Main Phone: (202) 628-8303 Direct: (202) 326-6127 Fax: (202) 628-2846 Email: aroberson@awwa.org
-----Original Message----- From: Biscoe.Melanie@epamail.epa.gov [mailto:Biscoe.Melanie@epamail.epa.gov] Sent: Thursday, October 22, 2009 3:32 PM To: Alan Roberson Subject: Re: AWWA Comments to EPA FIFRA SAP

Alan,
Thanks very much for sending AWWA's comments on atrazine to the SAP docket. We appreciate the time you spend on examining the atrazine issue. Bob McNally indicated that you'd like to meet with OPP sometime in November. Just let me know what days/times work for you, and I'll put it on our calendars. I look forward to meeting you soon. FYI I didn't receive your email with the attached comments directly because of an email typo - my email is biscoe.melanie@epa.gov (there is actually no "r" in my name, although people occasionally slip one in- no offense taken!)
Best Regards, Melanie Biscoe Chemical Review Manager Risk Management and Implementation Branch IV (RMIB IV) Pesticide Re-evaluation Division (PRD) Office of Pesticide Programs (OPP) biscoe.melanie@epa.gov 703-305-7106From: Alan Roberson <ARoberson@awwa.org>

To: Peter Silva/DC/USEPA/US@EPA, Steve Owens/DC/USEPA/US@EPA, Robert Mcnally/DC/USEPA/US@EPA, "briscoe.melanie@epa.gov" <briscoe.melanie@epa.gov>, Cynthia Dougherty/DC/USEPA/US@EPA, Pamela Barr/DC/USEPA/US@EPA, Edward Ohanian/DC/USEPA/US@EPA Date: 10/22/2009 02:19 PM Subject: AWWA Comments to EPA FIFRA SAP

Enclosed are comments by the American Water Works Association (AWWA) that were submitted to the Docket today for the upcoming Nov. 3 FIFRA SAP meeting on the atrazine evaluation. J. Alan Roberson, P.E. Director of Security and Regulatory Affairs American Water Works Association 1300 Eye Street NW, #701W Washington, DC 20005 Main Phone: (202) 628-8303 Direct: (202) 326-6127 Fax: (202) 628-2846 Email: aroberson@awwa.org (See attached file: Atrazine SAP Evaluation JAR 102209.pdf)

________________________________________________________________________ This email has been scanned for all viruses by the MessageLabs SkyScan service.

________________________________________________________________________ **----- Forwarded by Melanie Biscoe/DC/USEPA/US on 12/20/2010 09:51 AM -----**
**From :**  **<dan.campbell@syngenta.com> To:**  **Melanie Biscoe/DC/USEPA/US@EPA Cc:**  **<andrew.merritt@syngenta.com> Date:**  **01/30/2009 11:27 PM Subject:**  **AMP and SMP data**



### Melanie – Enclosed are spreadsheets reporting the results from the 2008 Atrazine Monitoring Program (AMP) and 2008 Simazine Monitoring Program (SMP). These two programs are required by the Atrazine Memorandum of Agreement and the Simazine Terms and Conditions (appendix J of the simazine RED), respectively. With these spreadsheets, we fulfill the reporting requirements from each program for 2008 monitoring. We are also formally submitting the final reports from the 2008 SMP and AMP monitoring by mail in the next few days. A very big thank you to Andrew Merritt for his hard work and

### perseverance with these submissions

.



### Melanie, we truly appreciate your great support and help with these two programs.
Thanks Dan

--------------------------------------------------- Dan Campbell Regulatory Affairs Team Lead, Herbicides Syngenta Crop Protection Office Telephone (336) 632-7627 Mobile Telephone (336) 509-5910

This message may contain confidential information. If you are not the designated recipient, please notify the sender immediately ,

and delete the original and any copies. Any use of the message by you is prohibited

.

**----- Forwarded by Melanie Biscoe/DC/USEPA/US on 12/20/2010 09:51 AM -----**
**From: "Len Sweet" <LSweet@ChemRisk.com>**  **To: Melanie Biscoe/DC/USEPA/US@EPA**  **Date: 07/28/2009 10:47 AM**  **Subject: RE: atrazine** 

Thanks very much Melanie I appreciate the information and your efforts. I guess that explains why I could not find the full document! With best regards, Len p.s. I don’t know if you know david travers or not (EPA is a big place) but he is an old friend of mine and plays some role in the water division at epa -----Original Message----- From: Biscoe.Melanie@epamail.epa.gov [mailto:Biscoe.Melanie@epamail.epa.gov] Sent: Tuesday, July 28, 2009 10:43 AM To: Len Sweet Subject: Re: atrazine Hi Len, Attached is the assessment you requested. I will send additional emails that contain appendices to the document. The document you requested is located in the Atrazine Special Review Docket, which has been placed on CD and is available upon request. Should you require any additional atrazine documents that EPA produced before its Reregistration Eligibility Decision, I suggest requesting the CD from ourFOIA office ( http :// www . epa . gov / foia / make

_ a

_ request
. html ).

The CD also has documents concerning additional chemicals that underwent Special Review. If you have any additional questions concerning atrazine, feel free to call or email.
Best Regards, Melanie Biscoe Chemical Review Manager Special Review and Registration Division Office of Pesticide Programs biscoe.melanie@epa.gov 703-305-7106 (See attached file: drinkingwater.pdf)

From: "Len Sweet" <LSweet@ChemRisk.com> To: Melanie Biscoe/DC/USEPA/US@EPA Date: 07/23/2009 01:52 PM Subject: atrazine

Hi Melanie I was reviewing some documents on atrazine, and it mentions an EFED “Drinking water exposure assessment for atrazine and various Chloro-triazine and Hydroxy-triazine Degradates”. Authors Lin, Nelson, Frankenberry. I cannot seem to find this online? Nor on the Docket. Is this publicly available? Thanks for your time and input Len

Len Sweet, PhD, MPH, MSc Senior Health Scientist ChemRisk, Inc. 20 Stanwix Street Suite 505 Pittsburgh, PA 15222 www.chemrisk.com
Phone: 412-281-6900 x 1025 Fax: 412-281-6999
**----- Forwarded by Melanie Biscoe/DC/USEPA/US on 12/20/2010 09:51 AM ----- From:**  **"AmyJo Klei" <AmyJo.Klei@epa.state.oh.us>**

**To: Melanie Biscoe/DC/USEPA/US@EPA**  **Cc: "Michael Eggert" <Michael.Eggert@epa.state.oh.us>**  **Date: 07/24/2009 08:53 AM**  **Subject: Re: Atrazine Call Follow-Up** 

Good morning Melanie, Thank you for the information and your time the other day. It was quite helpful to know the current status of the atrazine monitoring program and that there's still room for input. We actually have a meeting today to discuss the atrazine TMDL target for the Mt. Orab watershed so the update is timely! I also wanted to provide you some background information on how Ohio EPA is approaching atrazine at our CWS. Ohio EPA currently makes Clean Water Act impairment listings for atrazine based on the annual average in raw source water. Ohio's CWA water quality standards were designed to protect source water quality to the extent that public water systems can meet the finished water SDWA standards utilizing only conventional treatment. Since atrazine is not effectively removed in a conventional treatment plant, many of our water systems with elevated atrazine in the source water are forced to use costly carbon or construct off-line reservoirs in order to meet SDWA requirements in the finished water, thereby shifting the burden of source water contamination from the generators in the watershed to the CWS and communities they serve. For the cases of the Mt. Orab and Piqua 303d listings we used the Syngenta raw water monitoring program data to show that annual average was above 3.0 ppb. For most of the other Ohio CWS in the Syngenta program we do not have raw water data collected in the stream source, only raw reservoir data. In Ohio many of our systems rely on upground reservoirs that are hydraulically disconnected from the stream and the CWS operators selectively pump when the stream water quality is good. We are working to collect in-stream atrazine data at our CWS intakes but given current financial and resource constraints it may be years before we can fully assess the public water supply beneficial use. Please feel free to contact me anytime to discuss Ohio's public water systems and atrazine and know we greatly appreciate the opportunity to comment. Thanks, Amy Amy Jo Klei Environmental Specialist Ohio Environmental Protection Agency Division of Drinking and Ground Waters Water Quality Characterization and Protection Section ph 614-644-2062 / fax 614-644-2909 amyjo.klei@epa.state.oh.us
Lazarus Government Center 50 West Town Street, Suite 700 Columbus, Ohio 43215 Mail to: P.O. Box 1049 Columbus, Ohio 43216-1049
>>> <Biscoe.Melanie@epamail.epa.gov> 7/23/2009 7:23 PM >>>Hi Amy ,

Thanks for your call yesterday. Just wanted you to know I haven't forgotten about you-- just had fire drill upon fire drill over the past day and a half. Here is the Atrazine Updates website
http://www.epa.gov/pesticides/reregistration/atrazine/atrazine_update.htm If you have any questions, just let me know. As a follow-up to our conversation, I think we'll be integrating some official communication with the CWSs themselves with regards to the Atrazine Monitoring Program, at the least. I'll let you know if anything else changes from what I explained about the CWS program (or from what is on the website). Feel free to contact me at any time to ask about atrazine! I'm also going to give your name to Nelson Thurman and Mark Corbin, who are trying to get state monitoring data for atrazine. Stay tuned for an email on that. Best Regards, Melanie Biscoe Chemical Review Manager Special Review and Registration Division Office of Pesticide Programs biscoe.melanie@epa.gov 703-305-7106

**----- Forwarded by Melanie Biscoe/DC/USEPA/US on 12/20/2010 09:51 AM -----**
**From :**  **<dan.campbell@syngenta.com> To:**  **Melanie Biscoe/DC/USEPA/US@EPA Cc:**  **<lchan@drexchem.com>, < janis**  **.mcfarland@syngenta.com>, <ephi@manainc.com>,**

**< jburley**  **@sipcamadvan.com>, <rolson@drexchem.com>, <lpruett@manainc.com>, <ngelmetti@oxon.it>**  **Date: 10/22/2009 04:55 PM**  **Subject: RE: Atrazine: Scheduling MOA Meeting Part 2** 

Melanie - The technical registrants of atrazine are looking forward to discussing the Agency's proposition for potential modifications to the Atrazine Memorandum of Agreement. Given the short timeframe since EPA scheduled this meeting, 3 of the 4 registrants were going to be missing key company representatives on October 26, and the registrants agreed in a discussion today that it would be helpful to postpone this meeting. However, your proposal for the afternoon of November 3 works well for all registrants, especially those that have the added issue with overseas travel and were planning to be in Washington DC on that day for the SAP. Therefore, we request that the meeting on the 26th be postponed, in lieu of your proposed meeting of the afternoon of November 3 . These discussions are extremely important and we hope this one week scheduling change is possible. Thank you----- Original Message

-----

From: Biscoe.Melanie@epamail.epa.gov [mailto:Biscoe.Melanie@epamail.epa.gov] Sent: Thursday, October 22, 2009 11:50 AM To: Campbell Dan USGR; McFarland Janis USGR; ephi@manainc.com; jburley@sipcamadvan.com; rolson@drexchem.com Cc: lchan@drexchem.com Subject: Atrazine: Scheduling MOA Meeting Part 2
Dear Atrazine Registrants, PRD would like to propose that, in addition to our meeting on October 26, we meet again on the MOA on November 3 from 2-4 (after the Atrazine SAP meeting). This second MOA meeting would likely include lawyers. PRD chose the afternoon after the SAP for this meeting with the thought that it would be more convenient for our registrants to meet at that time. If this meeting day/time poses any problems for you, please let me know as soon as possible so we may make scheduling changes. Thanks very much, Melanie Biscoe Chemical Review Manager Risk Management and Implementation Branch IV (RMIB IV) Pesticide Re-evaluation Division (PRD) Office of Pesticide Programs (OPP) biscoe.melanie@epa.gov 703-305-7106

-------------------------------------------------------------------------- This message may contain confidential information. If you are not the designated recipient, please notify the sender immediately, and delete the original and any copies. Any use of the message by you is prohibited. **----- Forwarded by Melanie Biscoe/DC/USEPA/US on 12/20/2010 09:51 AM -----**
**From :**  **Alan Roberson <ARoberson@awwa.org> To:**  **Melanie Biscoe/DC/USEPA/US@EPA Date:**  **11/02/2009 01:00 PM Subject:**  **Re: AWWA Comments to EPA FIFRA SAP**

Melanie as luck would have it I now need to be in Philadelphia on the 12th for the NDWAC (something like SAP for water)
Can we reschedule for the 20th? Alan ----- Original Message ----- From: Biscoe.Melanie@epamail.epa.gov <Biscoe.Melanie@epamail.epa.gov> To: Alan Roberson Sent: Fri Oct 23 12:02:04 2009 Subject: RE: AWWA Comments to EPA FIFRA SAP Hi Alan, Thanks so much for your email. How about Thursday Nov. 12, at 10 AM? I'll set up a meeting invite - we can always change it if there ends upbeing a conflict

.

Thanks for the heads up that there's a positive reaction to getting the Syngenta results out faster. My (relatively uninformed) impression is that the Consumer Confidence Report and the Public Notification Rules are more OW's realm, and I can't speak to what they may or may not be considering with regards to atrazine notification. Look forward to meeting with you, and keep in touch. Best Regards, Melanie Biscoe Chemical Review Manager Risk Management and Implementation Branch IV (RMIB IV) Pesticide Re-evaluation Division (PRD) Office of Pesticide Programs (OPP) biscoe.melanie@epa.gov 703-305-7106

From: Alan Roberson <ARoberson@awwa.org> To: Melanie Biscoe/DC/USEPA/US@EPA Cc: Robert Mcnally/DC/USEPA/US@EPA, Steve Via <SVia@awwa.org> Date: 10/23/2009 11:15 AM Subject: RE: AWWA Comments to EPA FIFRA SAP

Melanie, I took a look at my November calendar and I have several mornings open: Thursday November 12 Friday November 13 Friday November 20 Monday November 23 Tuesday November 24 I would assume I would come over to OPP and I think you guys have moved further south in Crystal City, right? I did feel out a few folks about how to shorten the timeframe of getting the monitoring results to the public and nobody has any problem with getting the Syngenta results out faster. But there was considerable concern about revising either Consumer Confidence Report or Public Notification Rule and making some sort of special requirement for atrazine. I will broaden my circle to see if I can come up with any creative suggestions. Alan J. Alan Roberson, P.E. Director of Security and Regulatory AffairsAmerican Water Works Association

1300 Eye Street NW, #701W Washington, DC 20005 Main Phone: (202) 628-8303 Direct: (202) 326-6127 Fax: (202) 628-2846 Email: aroberson@awwa.org
-----Original Message----- From: Biscoe.Melanie@epamail.epa.gov [ mailto:Biscoe.Melanie@epamail.epa.gov] Sent: Thursday, October 22, 2009 3:32 PM To: Alan Roberson Subject: Re: AWWA Comments to EPA FIFRA SAP

Alan,
Thanks very much for sending AWWA's comments on atrazine to the SAP docket. We appreciate the time you spend on examining the atrazine issue. Bob McNally indicated that you'd like to meet with OPP sometime in November. Just let me know what days/times work for you, and I'll put it on our calendars. I look forward to meeting you soon. FYI I didn't receive your email with the attached comments directly because of an email typo - my email is biscoe.melanie@epa.gov (there is actually no "r" in my name, although people occasionally slip one in- no offense taken!)
Best Regards, Melanie Biscoe Chemical Review Manager Risk Management and Implementation Branch IV (RMIB IV) Pesticide Re-evaluation Division (PRD) Office of Pesticide Programs (OPP) biscoe.melanie@epa.gov 703-305-7106
From: Alan Roberson <ARoberson@awwa.org> To: Peter Silva/DC/USEPA/US@EPA, Steve Owens/DC/USEPA/US@EPA, Robert Mcnally/DC/USEPA/US@EPA, "briscoe.melanie@epa.gov" <briscoe.melanie@epa.gov>, Cynthia Dougherty/DC/USEPA/US@EPA, Pamela Barr/DC/USEPA/US@EPA, Edward Ohanian/DC/USEPA/US@EPA Date: 10/22/2009 02:19 PM Subject: AWWA Comments to EPA FIFRA SAPEnclosed are comments by the American Water Works Association (AWWA)

that were submitted to the Docket today for the upcoming Nov. 3 FIFRA SAP meeting on the atrazine evaluation. J. Alan Roberson, P.E. Director of Security and Regulatory Affairs American Water Works Association 1300 Eye Street NW, #701W Washington, DC 20005 Main Phone: (202) 628-8303 Direct: (202) 326-6127 Fax: (202) 628-2846 Email: aroberson@awwa.org (See attached file: Atrazine SAP Evaluation JAR 102209.pdf)

________________________________________________________________________ This email has been scanned for all viruses by the MessageLabs SkyScan service.

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________________________________________________________________________ **----- Forwarded by Melanie Biscoe/DC/USEPA/US on 12/20/2010 09:51 AM -----**
**From :**  **Kris Venkatesh <kvenkatesh@manainc.com> To:**  **Melanie Biscoe/DC/USEPA/US@EPA Date:**  **11/04/2009 03:18 PM Subject:**  **RE: Atrazine Meeting**

Melanie: Thank you for the information. It was nice meeting you as well. Hope to see you n future meetings. Kris Venkatesh MANA -----Original Message----- From: Biscoe.Melanie@epamail.epa.gov [mailto:Biscoe.Melanie@epamail.epa.gov] Sent: Wednesday, November 04, 2009 3:04 PM To: Kris Venkatesh Subject: Re: Atrazine Meeting Hi Kris, It was nice meeting you as well - thanks for coming. Below is the list of the items we discussed yesterday. If you need anything else, just let me know.1

. Providing drinking water monitoring data to the public more quickly

.

2. Monitoring to capture peak, single-day exposures in Community Water Systems. 3. Establishing a performance standard for the 298 ppb one-day drinking water level of concern established in the Atrazine RED. 4. Prohibiting atrazine use in the watershed after one exceedance of the 37.5 ppb 90-day rolling average.
Best Regards, Melanie Biscoe Chemical Review Manager Risk Management and Implementation Branch IV (RMIB IV) Pesticide Re-evaluation Division (PRD) Office of Pesticide Programs (OPP) biscoe.melanie@epa.gov 703-305-7106

From: Kris Venkatesh <kvenkatesh@manainc.com> To: Melanie Biscoe/DC/USEPA/US@EPA Date: 11/04/2009 09:40 AM Subject: Atrazine Meeting

Hi Melanie: It was nice meeting you yesterday. I would appreciate if you can send me the 4 agenda items that was discussed yesterday. Thank you, Kris Venkatesh MANA

**----- Forwarded by Melanie Biscoe/DC/USEPA/US on 12/20/2010 09:51 AM -----**
**From :**  **Alan Roberson <ARoberson@awwa.org> To:**  **Robert Mcnally/DC/USEPA/US@EPA, Melanie Biscoe/DC/USEPA/US@EPA Date:**  **11/20/2009 04:30 PM Subject:**  **today's meeting**

Bob and Melanie, I don’t have Eric’s email but I wanted to circle back around on one issue as I have donea little research on the regulatory requirements.

So I checked the SDWA in Consumer Confidence Report (CCR) Section 1414(c)(4) on the issue of language for contaminants at 1⁄2 of the MCL. And the language is clear that this requirement is for 3 contaminants and right now those are arsenic, nitrate, and lead. So to add atrazine would necessitate removing 1of the existing 3 and in my opinion, that would be challenging as these 3 occur more frequently than atrazine. So I wanted to clarify that one issue as it was my attempt at being creative but the law makes my concept challenging. Thanks for the time and I will work to set up the other meeting on monitoring in early January. Alan J. Alan Roberson, P.E. Director of Security and Regulatory Affairs American Water Works Association 1300 Eye Street NW, #701W Washington, DC 20005 Main Phone: (202) 628-8303 Direct: (202) 326-6127 Fax: (202) 628-2846 Email: aroberson @ awwa

. org

**----- Forwarded by Melanie Biscoe/DC/USEPA/US on 12/20/2010 09:51 AM -----**
**From :**  **"Sass, Jennifer" < jsass**  **@nrdc.org> To:**  **Melanie Biscoe/DC/USEPA/US@EPA, "Colangelo, Aaron" <acolangelo@nrdc.org>, "Alan**

**Roberson" <ARoberson@awwa.org>, <**  **jwhite @ksgrains.com>, <tylerw@fb.org>, "Wu, Mae"**  **<mwu@nrdc.org> Date:**  **11/13/2009 08:20 PM Subject:**  **RE: Atrazine: Stakeholder Conference Call on Informing the Public about Drinking Water**

**Monitoring Results**

Dear Melanie, We would be pleased to talk with you. If you send a few dates/times options (or use one of the meeting wizard type of planning tools) then I'm sure we can find something that works with all of us. I have include Mae Wu in this email because she does all our drinking water work for NRDC. Best wishes, Jen sass

-----Original Message----- From: Biscoe.Melanie@epamail.epa.gov [mailto:Biscoe.Melanie@epamail.epa.gov] Sent: Friday, November 13, 2009 4:43 PM To: Sass, Jennifer; Colangelo, Aaron; Alan Roberson; jwhite@ksgrains.com; tylerw@fb.org Subject: Atrazine: Stakeholder Conference Call on Informing the Public about Drinking Water Monitoring Results

Dear Atrazine Stakeholders,OPP indicated in its previous conference call with you ( on the human

health re-evaluation of atrazine) that we would be interested in working with you to explore better ways to inform the public more quickly about results of atrazine drinking water monitoring. We would like to have a conference call discussion with you all on this topic sometime in the next three weeks. Please email me with information on days and times that would (or would not) work well for you, and I will try to find a place in the schedule that works well for all of us. Thanks very much and I look forward to our discussion. Best Regards,

Melanie Biscoe Chemical Review Manager Risk Management and Implementation Branch IV (RMIB IV) Pesticide Re-evaluation Division (PRD) Office of Pesticide Programs (OPP) biscoe.melanie@epa.gov 703-305-7106

**----- Forwarded by Melanie Biscoe/DC/USEPA/US on 12/20/2010 09:51 AM -----**
**From :**  **<dan.campbell@syngenta.com> To:**  **Melanie Biscoe/DC/USEPA/US@EPA Cc:**  **<Todd.Barlow@syngenta.com>, <ron.williams@syngenta.com> Date:**  **11/11/2009 09:04 AM Subject:**  **RE: Atrazine - Nov. 12 Meeting in MO and Kickapoo Tribe**

Melanie, Attached is the slide set for the meeting in MO on the 12th. We have worked hard to get Kickapoo to submit samples; they committed to start sending samples as scheduled during the last visit made by Todd Barlow. We are keeping an eye on this and will let you know if we continue to have issues receiving samples.
Thanks Dan Dan Campbell Syngenta Crop Protection Regulatory Affairs Team Lead, Herbicides Phone (336) 632-7627 Mobile Phone (336) 509-5910 -----Original Message----- From: Biscoe.Melanie@epamail.epa.gov [mailto:Biscoe.Melanie@epamail.epa.gov] Sent: Friday, November 06, 2009 6:11 PM To: Campbell Dan USGR Subject: Atrazine - Nov. 12 Meeting in MO and Kickapoo Tribe

Hi Dan, (1) What is the agenda for the Nov. 12 stakeholder meeting in MO?(2) Kickapoo Tribe recently contacted Region 7 about wanting

monitoring of its water system. You had indicated a while back that it was difficult to get access to the system. Is that still the case? What is the status, and does Region 7 or OPP need to help in some way for you to gain access? Thanks, Melanie Biscoe Chemical Review Manager Risk Management and Implementation Branch IV (RMIB IV) Pesticide Re-evaluation Division (PRD) Office of Pesticide Programs (OPP) biscoe.melanie@epa.gov 703-305-7106

-------------------------------------------------------------------------- This message may contain confidential information. If you are not the designated recipient, please notify the sender immediately, and delete the original and any copies. Any use of the message by you is prohibited.

**----- Forwarded by Melanie Biscoe/DC/USEPA/US on 12/20/2010 09:51 AM -----**
**From: Melanie Biscoe/DC/USEPA/US**  **To: "Jere White" <**  **jwhite @ksgrains.com>, "'Sass, Jennifer'" <**  **jsass @nrdc.org>, Melanie** 

**Biscoe/DC/USEPA/US@EPA, "'Colangelo, Aaron'" <acolangelo@nrdc.org>, "'Alan Roberson'" <ARoberson@awwa.org>, <tylerw@fb.org>, "'Wu, Mae'" <mwu@nrdc.org>**  **Date: 11/24/2009 01:10 PM**  **Subject: Atrazine: Date/Time for Stakeholder Conference Call on Informing the Public about Drinking Water** 

**Monitoring Dear Atrazine Stakeholders,** 
**Thanks everyone for your feedback on meeting dates and times for our discussion on informing the public more quickly about results of atrazine drinking water monitoring .**  **OPP proposes the following date/time for a conference call with all of you: Friday**  **Friday ,**  **, December**  **DecemberDecember December** 

**4 ,**  **1 -**  **2 PM**  **If this does not work for you, please let me know and I'll reschedule for the following week. The call-in information for this call will be the following :**  **Call -**  **In Number In NumberIn Number**  **In Number : 866** 

**- 299**  **- 3188**  **Conference Code Conference Code :** 

**:**
**Thanks very much and I look forward to our discussion. Best Regards**  **,**

**Melanie Biscoe Chemical Review Manager**  **Risk Management and Implementation Branch IV (RMIB IV) Pesticide Re-evaluation Division (PRD)**  **Office of Pesticide Programs (OPP) biscoe.melanie@epa.gov**  **703-305-7106 ----- Forwarded by Melanie Biscoe/DC/USEPA/US on 12/20/2010 09:51 AM -----** 
**From :**  **<dan.campbell@syngenta.com> To:**  **Melanie Biscoe/DC/USEPA/US@EPA Date:**  **12/08/2009 01:53 PM Subject:**  **RE: Atrazine: Frequency of Monitoring Followup (Peaks)**

Melanie - Enclosed is requested slide set. For the question about the "replacement" sampling (from Wenlin): The primary reason required for replacement in the bootstrap sampling algorithm is to maintain the original statistical structure unchanged (variability and distribution) in each of the bootstrap samples comparing to the original sample. See reference: Efron, B., and R.J. Tibshirani.1993. (An Introduction to the Bootstrap. Chapman & Hall/CRC). With replacement sampling, the same value can be re-sampled many times with the same probability each time a bootstrap simulation is executed. Efron showed by random sampling with replacement, the variability captured in the bootstrap samples can best represent the original sample and its associated population.
Thanks Dan Dan Campbell Syngenta Crop Protection Regulatory Affairs Team Lead, Herbicides Phone (336) 632-7627 Mobile Phone (336) 509-5910
-----Original Message----- From: Biscoe.Melanie@epamail.epa.gov [mailto:Biscoe.Melanie@epamail.epa.gov] Sent: Tuesday, December 08, 2009 9:29 AM To: Campbell Dan USGR Subject: Atrazine: Frequency of Monitoring Followup (Peaks)

Hi Dan, Would it be possible to get the slides from last week's presentation today (even if the raw data can't be sent)? That would be really helpful to our team. Just let me know - thanks! Also, I think the main question we had from last week's meeting was, what was the justification for putting individuals back in the population before sampling again? I guess we're not sure what added value that provides as opposed to just sampling from the populationwithout replacement

. If you all can provide some insight on that , it

would be helpful. We're going to have an internal meeting as follow-up to your presentation and perhaps come up with other questions, but this is the primary one that has been brought up.

Melanie Biscoe Chemical Review Manager Risk Management and Implementation Branch IV (RMIB IV) Pesticide Re-evaluation Division (PRD) Office of Pesticide Programs (OPP) biscoe.melanie@epa.gov 703-305-7106

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