Need to return call by / at/between and

. Signature: Project No.: 

### 0 317.0 2 .005.510 Page 1 of 3

Project Name: 

### DMR20 1 3 

## CBI?

Yes

No TELEPHONE CALL RECOR D

Incoming

Outgoing Date: 

### 12/19 /1 4 Time: 

### 2 : 00 am

pm

Company Name: 

### City of Tolleson AZ WWTP ERG Staff Name: 

### Kimberly Bartell

Contact Name: 

### David Tyler Contact Phone Number: 

### ( 623) 936

- 3381

General Subject: 

### 2013 Hydrogen Sulfide Discharges at POTWs



## TOPICS DISCUSSED AND ACTION TAKEN

On December 19 th 

### , I called the City of Tolleson WWTP and left a message.

On December 22 nd 

### , I called the City of Tolleson WWTP and left a message.

On December 30 th 

### , I called the City of Tolleson WWTP and was transferred to David Tyler who I left a

message for.

On January 5 th 

### , David Tyler retu rned my call and state that there are liquid phase testing (the H2S concentration

itself) and gas phase testing (H2S gas in manholes) for H2S.The WWTP does liquid phase testing, they have

daily max and monthly avg limits in their NPDES permit for H2S. The WWTP monitors once every 2 weeks

when discharging to a water body. The WWTP only discharges a few times a year to a water body, the rest of

the time the fa cility discharges to a nuclear treatment facility. Mr. Tyler requested an email, please see attached

email correspondence.

Email: dtyler@tollesonaz.orgNeed to return call by / at/between and

. Signature: 

### Email Correspondence with City of Tolleson WWTP:

From: David Tyler (dtyler@tollesonaz.org)

To: Kimberly Bartell

CC: William Swietlik, Kim Wagoner

Date: 1/15/15 1:06 PM

Subject: RE: Hydrogen Sulfide Discharges at POTWs

Dear Ms. Bartell:

Thank you for your patience. The following response answers questions 1 & 2 in your email, and provides the data you requested.

1a) As requested, below are the Raw and Effluent treatment plant data for hydrogen sulfide. The data covers 2013 & 2014. Our

facility discharges on an intermittent basis; therefore, some months there is no data for hydrogen sulfide.

Hydrogen Sulfide Total Sulfide Dissolved Sulfide

(mg/l) (mg/l) (mg/l)

TREATED PLANT EFFLUENT

October 2014 <0.50 0.017

---- April 2014 <0.013 0.040

---- January 2014 <0.01 0.35

----

October 2013 <0.013 0.020

---- September 2013 0.01

---- ---- May 2013 <0.013 0.040

---- April 2013 <0.013 0.045

---- February 2013 <0.013

---- --- -

RAW INFLUENT

October 2013 0.23 3.86 0.343

August 2013 0.742 6.9 1.35

1b) Our facility incorporates the Trickling Filter/Solids Contact method of treatment. Primary clarifiers, 2 First Stage Bio

- Towers

(with Plastic Cross

- flow Media), Intermedia te clarifiers, 2

- Second Stage Trickling Filters (with rock media), sludge reaeration basins,

anaerobic sludge digestion. Note, Chlorine is used for effluent disinfection, followed by dechlorination using Sodium Bisulfite.

For odor contro l within the facility (namely the reduction of sulfides in the influent stream so as to minimize hydrogen sulfide released

into the atmosphere); the facility has both liquid phase (chemical addition) and air phase (the collection of foul odors foll owed by bio

scrubber and carbon filter) treatment systems. Above data reflects both systems being on

- line. The liquid phase odor control system

consists of the capability of dosing the RAW Influent streams with either Ferric Chloride, Hydrogen Peroxide or both. We routinely

use only Hydrogen Peroxide at about 80 to 100 gallons per day. The influent flow is 5.5 MGD average daily flow.

2) In general, hydrogen sulfide is a parameter of concern due to its corrosive nature, its toxicity to human health (collection system

staff), and its contribution toward nuisance odors. Additionally, hydrogen sulfide’s role or its potential to contribute to whole effluent

toxicity is unknown, at least to me. Outside of this general concern, our pretreatment section has not iden tified hydrogen sulfide

specifically as a parameter of concern.

Please feel free to contact me if you should have any questions.

Regards,

David L. Tyler

Superintendent Wastewater Utilities

Dir (623) 478

- 8722

Fax (602) 352

- 0053Need to return call by / at/between and

. Signature: From: Kimberly Bartell

To: David Tyler

CC: William Swietlik, Kim Wagoner

Date: Tuesday, January 6, 2015 1:16pm

Subject: Hydrogen Sulfide Discharges at POTWs

Dear Mr. Tyler:

Thank you for returning my phone call. As discussed, Eastern Research Group, Inc. (ERG) under EPA Contr act No. EP

- C

- 12

- 021, is

e

- mailing you to request information on hydrogen sulfide discharges at publicly owned treatment works (POTWs). See below

for background on what the information is used for.

EPA reviews publicly

- available discharge monitoring repor t (DMR) and Toxic Release Inventory (TRI) data to fulfill its review

obligation under Section 304(b) of the Clean Water Act. The CWA requires EPA to annually review and, if appropriate, revise i ts

water pollution control technology

- based regulations, calle d "effluent gu idelines and standards," that limit the discharge of

pollutants directly to waters of the U.S. and to POTWs from various categories of industrial facilities. EPA is currently conducting its

2015 annual review of existing effluent guidelines a nd standards and new potential industrial guidelines which may need to be

included (see http://www.epa.gov/guide/304m/ for further information). EP A will discuss this review and the results in its 2015

Effluent Guidelines Program Plan scheduled for publication in the Federal Register sometime in 2015 or 2016.

As part of this year’s annual review, EPA is reviewing 2013 TRI data. In 2011, TRI began requiring facilities to report wastewater

discharg es of hydrogen sulfide to surface water and POTWs. Since this is a relatively new pollutant in TRI, we are trying to determine

how facilities are reporting the discharges and also gather a sense of the removal of this pollutant upon treatment at a POTW

. To help

us with this investigation, we would appreciate your input on the following questions about hydrogen sulfide discharges from

industrial facilities discharging to your POTW:

1) Do you have any treatment data on hydrogen sulfide (influent or efflu ent concentrations, treatment technologies used at your

POTW and its expected effectiveness for removing H2S)?

2) Do you have any concerns about the hydrogen sulfide loads coming from industrial facilities?

Please call me at (517) 515

- 1721 if you have a ny questions. If you would like to speak directly with EPA regarding this request, you

can contact William F. Swietlik of EPA's Office of Water/Engineering Analysis Division by phone at (202) 566

- 1129 or by

email: swietlik.william@epa.gov

.

Thank you,

Kimberly

-------------------------------------- Kimberly D. Bartell

Environmental Engineer

Eastern Research Group, Inc.

kimberly.bartell@ erg.com

Phone: 517

- 515

- 1721