## Weitzler, Ellen From: 

### Sent: To: 

### Subject: Attachments: 

## Hi Ellen , Kavanah , Brian W <Brian.W.Kavanah@maine.gov> Monday , July 22 , 2013 5:12PM Weitzler, Ellen ; Margerum, Mark T 

### RE: adopted revision of phenol for consumption ofwater+ organism phenol calculation : pdf



## I looked through Bob ' s rulemaking files and found this
. Page 2 has his calculations
. Please let me know if this clarifies the issue for you . Thanks
.
From: Weitzler, Ellen [mailto:Weitzler.EIIen@epa.gov] 

## sent: Monday, July 22, 2013 9:52AM To: Margerum, Mark T 

### Cc: Kavanah, Brian W 

### Subject: adopted revision of phenol for consumption of water 

### + organism Hi Mark, I'm working on the approval letter for acrolein and phenol in state waters. Using the EPA methodologies and Maine's fish consumption rate of 32.4 gm/day, I was able to calculate human health criteria for acrolein that agreed w ith Maine' s adopted revisions to 3.9 ug/L (for consumption of water+ organisms) and 5.0 (for consumption of organisms only). I was also able to calculate the human health criteria for phenol for consumption of organisms only that agreed with Maine's adopted revision to 462,963 ug/L. However, I was not able to derive Maine's adopted revision of the phenol criteria for consumption of water+ organisms to 10,514 ug/L. Using the following criteria derivation equation for Ambient Water Quality Criteria (AWQC) AWQC 

# = RfD x RSCx [ BW/ { DI+ {FIx BAF))] (see parameter definitions and values below) leads to a criteria of 10,267 ug/L. Please let me know if you have made any other assumptions regarding the parameters below or any other revis i on to the methodology to account for the difference. Thanks Ellen

Human Health Criteria for Phenol for consumption ofWater and Organisms
1

### RfD (Reference Dose) in mg/kg-day 

### RSC (Relative Source Contribution to account for other sources of exposure) as a %of total exposure 

### BW (Human Body Weight for average adult) in kg 

### Dl (Drinking Water Intake for average adult) in L/day 

### Fl (fish Intake) in kg/day 

### BAF (bioaccumulation Factor) in l/kg (or BCF if no BAF) AWQCin mg/L
Ellen Weitzl er, P
. E. Water Quality Standards Coordinator USEPA-New England Region 1 5 Post Office Square, Suite 100 Boston, MA 02109-3912 Tel 617 - 918 - 1582 0.3

1 70

2 0.0324 1 .4 10,267

2

### 2000 Methodology Calculations Linear

### Approach Using cancer potency, ql*: For consumption of water and organisms: (1

## o· 6 tqt * ) • 10 kg • 1 

## ooo iJ.g{mg AWQC [IJ.g/L] = ------- ---------------------- (2 Ud 

### + (0.0 175 kg/d • BCP [UkgJ)) For consumption oforganisms only:

. 

# .**{10~/ql )**  • 70 kg • 1000 f.Lg/mg AWQC [!,Lg/L] = 0.0175 kg/d • BCF [Ukg) Using Reference Dose: For consumption ofwater and organisms: AWQC [f.Lg/L] = [R1D [mglkg-d] • RSC 

## * (70 kg/ 2 Ud+(0.0175 kgfd • BCF [Ukg])) • 1000 flgfmg or (- RSC) For consumption oforganisms only:
A

WQC [f.Lg/L] = [R1D [mglkg-d] • RSC • (70 kg! (0.0 1 75 kg/d • BC F [Ukg]))] • 1000 f,lg/mg ( -RSC)
. NonlinearApproach (Presented for infOrmation only- no criteria in matrix based on nonlinear approach currently) For consumption of water and organisms: AWQC [ ug/L] = PODIUF • RSC • (BW/DI + (FI e BCF) For consumption oforganisms only: AWQC fug!Ll = PODIUF • RSC • 

## * (BW/(FI •BCF) A

WQC = Ambient**w~~ter** quality criteria= national recommended water quality criteria ql* =Cancerpotency fartor kg-dfmg or per mglkg-da:y RSD =Risk specific dose 10
.. /ql

### * mgllcg-day RID = Reference dose mglkg-d DI = Drinking water intake 2 Uday BW =Human bodyweight 70 kg Fl =Fish intake 0.0175 kg/day BCF 

### =**Bi~ncentration** factor l1kg UF"" Uncertainty factor (unitless) RSC = Relative source contribution (percentage ofsubtraction) POD= Point of departure mglkg-day

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