t 
SDMS Document 
Harding Lawson Associates 
115575 
October 20, 1995 
29872 12.4 
Ms. Sherrel Taylor-Domville 
United States Environmental Protection Agency 
Region II 
Emergency and Remedial Response Division 
290 Broadway 
New York, New York 10007-1866 
Supplemental Work Plan 
Remedial Investigation 
VICHEM Site 
St. Croix, U.S. Virgin Islands 
Dear Ms. Taylor-Domville: 
This letter is presented as the agreed upon follow up to discussions during the Virgin Islands 
Chemical (VICHEM) Remedial Investigation (RI) project meeting held on Friday, October 6, 1995. 
Harding Lawson Associates (HLA), on behalf of Island Chemical Company, will prepare a 
Supplemental Work Plan designed to address concerns raised by and discussed with EPA during the 
project meeting. The Supplemental Work Plan will include recommendations for further activities 
associated with the RI currently tmderway at the site. The tasks to be presented in the Supplemental 
Work Plan are proposed to be performed prior to completion of the RI report. The Supplemental 
Work Plan will include a revised schedule for completion of the RI and associated tasks. 
The following tasks, specified in the current project schedule, will be postponed pending EPA review 
and approval of the Supplemental Work Plan: 
Quarterly groundwater sampling event, currently scheduled for November 1995 
Phase II Risk Assessment Activities, as may be required 
Preparation of RI Report 
Development of Remedial Action Objectives and Screening of Alternatives 
Feasibility Study, as may be required 
The Supplemental Work Plan will adhere to the currently approved Field Sampling Plan, Health and 
Safety Plan, and Quality Assurance Project Plan. Copies of these various plans will not be 
resubmitted with the Supplemental Work Plan. 
305269 
Engineering and 
131 North Tfiird Street, Philadelphia, PA 19106-1903 215/627-4505 Fax 215/627-4250 
Environmental Services 
.-l Subsidiary of Harding Associates ' Offices Kalionwide 
} 
Harding Lawson Associates 
October 20, 1995 
29872 12.4 
Ms. Sherrel Taylor-Domville 
United States Environmental Protection Agency 
Page 2 
HLA plans to submit the draft Supplemental Work Plan to EPA for review by November 21, 1995. A 
representative of HLA will telephone you on Monday, October 23 to confirm your receipt of this 
letter, and acceptance of the schedule modifications suggested above. 
Very truly yours, 
HARDING LAWSpN^^^OCIATES 
fason M. SchindlSfTP.G. 
Associate Geologist 
Edward A. Nemecek, R.G., CPG 
Regional Geosciences Manager 
cc: 
Santo Guillermain, Berlex Laboratories 
Lori G. Singer, Esq., Sills, Cummis, Zuckerman, Radin, Tischman, Epstein & Gross 
JMS/tg/DRM/mls/EAN 
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305270