Document QLYNq7YZemO3OGjKd1JYnzN8

ChemRisk A Division of McLaren/Hart Environmental Engineering The Courtland East Building 29225 Chagrin Boulevard Cleveland, OH 44122 (216)464-6564 FAX (216) 464-6101 October 7, 1996 VIA FACSIMILE/FEDERAL EXPRESS Mr. W. Caffey Norman, III Patton, Boggs & Blow, L.L.P. 2550 M Street, N.W. Washington, DC 20037 PH: (202)457-5270 RE: Amendment to: Proposal CL96-0148 to Evaluate 1,2-Dichloroethane with Regard to a Proposed HAP Test Rule Dear Mr. Norman, Based on the meetings in Washington, DC with USEPA last week and the conference call between you, Peter Voytek and I, the following scope of work is proposed: ChemRisk will prepare a draft document for submittal to the USEPA on or before October 24, 1996 proposing to fill data gaps for EDC with PBPK modeling. Specifically: Model oral study of Daniel et al. 1994 to add further support to the acute data base. Model NTP (1991) oral study to fill neurotoxicity data gaps. ChemRisk will provide copies of the draft report to the HAP Task Force by Monday, October 21, 1996 and we require comments back (via FAX) by 3:00 p.m. on October 22, 1996 so we may make changes and meet the October 24, 1996 deadline. DO 179758 CONF TOFNTTAI me Mr. Norman Page 2 October 7, 1996 The cost to prepare the draft and final PBPK proposal document is $7285. Please refer to the attached sheets if more detail is necessary. If this amendment is agreeable, please sign and return one copy of the enclosed Project Authorization Form. Sincerely, /O Michael L. Gargas, Ph.D. Principal Health Scientist MLG/rmh 00 1?9?59 OONFTDFNTTAl PROJECT AUTHORIZATION FORM ChemRisk is hereby authorized to provide professional services as defined in the Proposal CL96-0148 dated August 1, 1996 and the Amendment dated October 7, 1996. All work will be completed in accordance with the scope of work as defined in that proposal and the McLaren/Hart Contract Terms and Conditions provided earlier. Time and Materials: $7285 AUTHORIZATION TO PROCEED: Name: Title: Representing: Address: Billing Address: ________________________ Date: Signature: OO 1 CONFTDFNTTAI PRICING ANALYSIS SPREADSHEET (PASS) PROPOSAL REFERENCE COMPANYJCUENT NAME: PHon. Bogm A Blow PROPOSAL TTTLE: EDC ___________ RATE A PRICING SUMMARY Class tabor US* Description 21 Principal Heath Scientist Gargss 54 Sr Associate Envtrorvnetfs Krrman 66 Secretary Hincharik Hoot 24 24 6 BN Rtf* $164 195 $47 Total $4,416 $2,260 $376 Tvd* Ctf*oory Expenses Meteriats/Sitfpies Expenses Field Equpment Expense* Travel Expenses &bcontractor Description LABOR PRICE $7,072 Costs Msrliui 1.20 110 1.00 1.10 Total M/HServ M/HServ Wri Sefv ConvTsviicabon Charges MET Lab Services Field Services 3H of labor Price ACCOUNT S BUDGET SUMMARY Twk Task TM* $2,072 0.03 TOO 1.00 EXPENSES PRICE $213 $213 PROJECT PRICE S7JSJ Task Budget 96148A.XLW PROJECT SUDOCT | I DO 1?9?M CONFTOFNTTAl 10/7/96 3:57 PM 1