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 m 3 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 (cm 2 /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 (cm 2 /s) Estimated based on the method provided in the Delisting Technical Support Document (DTSD), Appendix 1A. 

### Solubility (SOL) 1.00 x 10 6 (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. K os (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.