Need to return call by / at/between and

. Signature: Project No.: 0 317.0 2 .005.52 0 Page 1 of 2

Project Name: TRI 20 1 3 

### CBI?

Yes

No TELEPHONE CALL RECOR D Incoming Outgoing Date: 04/14 /15 Time: 11:36 am

pm

Company Name: Graftech International Holdings, Inc. ERG Staff Name: Kara Edquist

Contact Name: Beverley Philpot Contact Phone Number: (931) 380

- 43 05

General Subject: 2013 TRI PAC Discharges for Graftech International Holdings, Inc., Columbia, TN



### TOPICS DISCUSSED AND ACTION TAKEN

On April 14 th 2015 at 11:36 am I called Ms. Julia Aslinger (931

- 381

- 4346) and left a message in the voicemail box of Tommy Underwood.

On April 22 nd , 2015 at 10:32 am, I left a message in the voicemail box of Tommy Underwood again requesting a contact for discussing TRI wastewater discharges

.

On April 23 rd , 2015 at 3:18 pm, I called the Graftech Columbia office (931

- 388

- 1410) and was transferred to Beverley Philpot’s voicemail box as a contact for wastewater discharges, but was told she would not be in the office until Monday. I left a message requesting her to call me back.

O n April 28 th , 2015 at 4:31pm, I called the Graftech Columbia office and asked the receptionist for Beverley Philpot’s direct number. The receptionist explained Ms. Philpot goes back and forth between the Columbia and Lawrenceburg offices. Columbia, TN: (93 1) 380

- 4305. Lawrenceburg, TN: (931) 762

– 7101 ext 7101

On April 29 th , 2015 at 1:31pm, I called Ms. Philpot’s Columbia office number. She confirmed the 394 lbs and explained how the facility calculates their PAC discharges from an estimation of the perce nt of PACs in the TSS of the wastewater. The facility estimates this as 4%.

Values Ms. Philpot shared:

 6.4 mg/L

– average concentration of TSS in wastewater for 2013

 0.504 MGD

– average flow for facility

 4%

- estimation of percentage of PAC in TSS based off of process knowledge

First the facility finds the pounds of TSS for the year:

6

. 4 mg TSS

L ∗ 504

, 000 gal

day ∗ 365 days ∗ 3

. 79 L

gal ∗ 2

. 2 lb

1

, 000

, 000 mg = 9816

. 69 lb TSS

Then the facility uses process knowledge to figure out the poun ds of PAC

9816

. 69 lb TSS ∗ 0

. 04 = 392

. 668 lb PACNeed to return call by / at/between and

. Signature: On April 29 th , 2015 at 2:38pm, I called Ms. Philpot’s Columbia office number and left a message asking if there was a note in the dataset about if the facility knew which specific PAC’s it discharge or on the increase in PAC discharges from 2012 to 2013.

On April 29 th , 2015 at 6:02pm, Ms. Philpot returned my call and left a message.

On April 30 th , 2015 at 9:16am, I returned Ms. Philpot’s call. She did not have a comment on the distribution of

PACs f or the facility and stated there was no note in the data set she was looking at. She did have a comment on the production differences from 2012 to 2013. She stated that there was an uptick in production. I left my email with Ms. Philpot to send the data or any information she may find concerning the PAC discharges/distribution.

On May 13 th , 2015 at 9:15am, I called Ms. Philpot to talk about the PAC sampling data GrafTech provided in 2010 which was able to list individual parameters. Ms. Philpot said she be lieve this was still the most recent sampling data for the facility and should be consistent with what the facility is discharging now.