Owosso update 

Todd Ramaly to: Terri Zick 02/23/2010 03:28 PM 

Bcc: Christopher Lambesis 

From: Todd Ramaly/R5/USEPA/US 

To: Terri Zick <tzick@cticompanies.com> 

Bcc: Christopher Lambesis/R5/USEPA/US@EPA 

Terri, 

The attached file includes physical, chemical, and toxicological parameters provisionally used for NMP in 

a custom run of DRAS. 

Using these values, we get the following results from DRAS: 

1) Limiting Values Using an RfC derived from the California EPA MADL for inhalation of 3.2 mg/day 

(divide by 20 m3 air per day to get RfC) - 0.16 mg/m 3 

no limit on total concentration 

no limit on TCLP concentration 

2) Limiting values using an RfD derived from the California EPA MADL for dermal exposure of 17 mg/day 

(divide by adult body weight -72 kg) - 0.53 mg/kg*day 

Maximum Allowable TCLP (dermal only) - 1,953,600 mg/L TCLP (basically no limit) 

Using the dermal RfD for ingestion - 8,836 mg/L TCLP 

Maximum Allowable Total - 1.73x10+19 mg/kg (again basically no limit) 

3) Using an RfD converted from the California EPA MADL for inhalation of 3.2 mg/day (divided by 72 kg 

adult bodyweight) - 0.044 mg/(kg*day): 

Ingestion-based MAX TCLP: 734 mg/L 

Ingestion-based MAX Total: 2.51x10 +9 mg/kg (in other words . . .no limit). 

The most restrictive limit is a maximum TCLP of 734 mg/L TCLP N-methyl-2-pyrrolidone. The surface 

pathway does not show a sensitivity to NMP, however, we can conservatively estimate a max total from 

the TCLP (for the purposes of simplified mass balance). Since TCLP includes a 20-fold dilution, you 

would have to have 14,680 mg/kg (1.468%) of NMP in the waste to theoretically have enough if all of it 

leached into the TCLP to hit the 734 mg/L TCLP. 

Sincerely, 

Todd D. Ramaly 

Environmental Scientist 

RCRA Programs Section 

U.S. EPA - Region 5 

(312) 353-9317 

(847)983-0335 (alternate work location - typically Mondays and Wednesdays) 
N-Methyl-2-Pyrrolidone 

CAS 872-50-4 

Reference Dose — Oral — (RfDo) 0.53 (mg/kg•day) 

Based on dermal exposure, converted from California EPA MADL 

Reference Dose — Inhalation (RfC) [into DRAS as a Reference Concentration] 0.16 (mg/m 3 ) 

California EPA MADL 

Bioconcentration Factor (BCF) 3.162 (L/kg) (estimated from Kow) 

US EPA. 2010. Estimation Programs Interface SuiteTM for Microsoft® Windows, v 4.00. United 

States Environmental Protection Agency, Washington, DC, USA. 

Henry's Law Coefficient (H) 3.16 x 10-8(atm•m3/K°•mole) 

US EPA. 2010. Estimation Programs Interface SuiteTM for Microsoft® Windows, v 4.00. United 

States Environmental Protection Agency, Washington, DC, USA. 

Diffusion Coefficient in Water (Dw) 1.627 x 10-5(cm2/s) 

Estimated based on the method provided in the Delisting Technical Support Document (DTSD), 

Appendix 1A. 

Diffusion Coefficient in Air (DA) 8.87 x 10-2(cm2/s) 

Estimated based on the method provided in the Delisting Technical Support Document (DTSD), 

Appendix 1A. 

Solubility (SOL) 1.00 x 106(mg/kg) (from experimental data (Riddick, J.A., et al, 1986)) 

US EPA. 2010. Estimation Programs Interface SuiteTM for Microsoft® Windows, v 4.00. United 

States Environmental Protection Agency, Washington, DC, USA. 

Landfill Dilution Attenuation Factor (DAFLF) 15.1 

Corresponds to the most conservative DAF for all organic constituents. 

Time to Reach Steady State (T*) 0.919 (hours) 

US EPA. 2010. Estimation Programs Interface SuiteTM for Microsoft® Windows, v 4.00. United 

States Environmental Protection Agency, Washington, DC, USA. 
Skin Permeability Coefficient (Kpw) 2.43 x 10-4(cm/hr) 

US EPA. 2010. Estimation Programs Interface SuiteTM for Microsoft® Windows, v 4.00. United 

States Environmental Protection Agency, Washington, DC, USA. 

Tau (T) 0.383 (hours) 

US EPA. 2010. Estimation Programs Interface SuiteTM for Microsoft® Windows, v 4.00. United 

States Environmental Protection Agency, Washington, DC, USA. 

Molecular Weight (MW) 99.13 (g/mole) 

US EPA. 2010. Estimation Programs Interface SuiteTM for Microsoft® Windows, v 4.00. United 

States Environmental Protection Agency, Washington, DC, USA. 

Vapor Pressure (VP) 4.54 x 10-4(atm) (Converted from 0.345 mm Hg) 

US EPA. 2010. Estimation Programs Interface SuiteTM for Microsoft® Windows, v 4.00. United 

States Environmental Protection Agency, Washington, DC, USA. 

Surface Water [Suspended-Sediment] Partition Coefficient (KDsw) 0.349 (L/kg) 

Estimated from the Koc as described in the DTSD using a fraction of organic carbon in sediment 

of 0.075. Kos(4.651) estimated from the Kow using KOCWINv2.00. US EPA. 2010. 

Estimation Programs Interface SuiteTM for Microsoft® Windows, v 4.00. United States 

Environmental Protection Agency, Washington, DC, USA. 

LogKow -0.38 (Sasaki, H., et al, 1998) 

US EPA. 2010. Estimation Programs Interface SuiteTM for Microsoft® Windows, v 4.00. United 

States Environmental Protection Agency, Washington, DC, USA.