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SDIVIS Document Harding Lawson Associates ^ ^ ^ 115551 September 14, 1994 24231 2.C.5 Ms. Sherrel Henry " U.S. Environmental Protection Agency Region II ' Emergency Remedial Response Division 26 Federal Plaza New York, New York 10278 Revised Draft Remedial Investigation Work Plan and Schedule Island Chemical Company, Inc. St. Croix, U.S. Virgin Islands Dear Ms. Hemy, Attached please find seven [7] copies of revised pages to be included in the above-referenced work plan. These pages are presented in response to your letter dated September 9, 1994. As noted in our previous response letter, dated June 23, 1994, the requirement for analysis of potable water to be used during this project vvill increase the overall schedule by eight weeks (Comment No. 16). Please note that the analytical results forwarded to you under this schedule would be unvalidated. The project schedule presented in the draft work plan has been revised to include the potable water sampling, as well as presentation of project deliverables. The draft Administrative Order on Consent (Order) dated August 4, 1994, contains numerous deadlines for project deliverables that are covered by the attached project schedule. Harding Lawson Associates (HLA) peirformed a critical path analysis of the deadlines specified. In some cases, the deadlines specified in the Order require deliverables be presented out of the typical sequence or prior to receipt of EPA comments on previous documents that would affect the preparation of the deliverables specified. Following are two examples of confusing deadlines that are required by the draft Order: • The deadlines specified in the draft Order would require preparation of the draft Feasibility Study Report approximately two months before preparation of the draft Remedial Investigation Report. Such a requirement is contrary to typical Remedial Investigation/FeasibUity Study programs. The hiformation generated in the Remedial Investigation is needed to perform the FeasibUity Study. Therefore the Remedial Investigation Report should be completed before the Feasibility Study begins. • The deadlines specified in the draft Order would require presentation of the Baseline Risk Assessment prior to receipt of EPA comments on the Pathways Analysis Report. The attached schedule combines these two deliverables to allow for a single presentation by the Respondents and review by EPA. In this way, EPA can review the single deliverable and make comments which can be incorporated in the final report. Because the approved schedule in the Work Plan is incorporated into the Order, the need for specific additional deadlines in the Order is unclear nnd, as illustrated by the examples above, confuses the overall schedule. HLA recommends that the following references to specific deadlines for deliverables 302137 Engineering and 131 North Third Street, Philadelphia, PA 19106-1903 215/627-4505 Fax 215/627-4250 Environmental Services .^ Subsidiary of Haiding Asscc-.^:es • offices .-^alionn-ide ^ September 14, 1994 24231 2.C.5 Ms. Sherrel Henry U.S. Environmental Protection Agency Harding Lawson Associates be deleted from the Order so that a single mutually agreed upon overall schedule may be followed for the entire project: Page 13, Section 28 C, second paragraph, first sentence. Delete the foUowing sentence: "Within 60 days of completion of field activities. Respondents shall provide EPA with a Data Summary Report CDSR')' Page 14, first full paragraph. Delete the foUowing phrase: "Within fourteen [14) days after Respondents' submittal of the DSR" Page 15, Section 28 E i, fhst sentence. Delete the following phrase: "Within fifteen [15) days V of submittal of die DSRZ Page 15, Section 28 E U, first sentence. Delete the following phrase: "Within thirt}' (SOj/aays of submitting die Pathway Analysis Report to EPAZ Page 16, Section 28 F, first sentence. Delete the followingc^hrase: "Within sixty [60) days of EPA's approval of the baseline risk assessment reportZ y ^ Page 16, Section 28 G, first paragraph, first sentence. Delete the following phrase: "Within thirty [30) days after Respondents' submittal of the baseline risk assessment report to EPAZ Page 16, Section 28 G, second paragraph, first sentence. Delete the following phrase: "Within fourteen [14) days after Respondent's submittal of the RAO and SOA report," Page 16, Section 28 H, fhst sentence. Delete the following phrase: "...within thirt}- [30) days of the Task VU presentation to EPAZ > V These changes are intended to Ihnit confusion on the project. All of the deliverables described in the Order are included on the attached revised schedule. Copies of the attachments have also been provided as specUied on the attached distribution page. If you have any questions regarding this, or any other project matter, please contact me at [609) 936-0700 or Jason Schindler at (215) 627-4505. Yours very truly, HARDING.LAWSON ASSOCLATES / / - / y.. zyc"^--^-'^— Edward A. Nemecek, R.G., C.P.G. Principal Hydrogeologist Attachments \WORK\24231\02\EPA05.LET ^c: Lori G. Singer, Esq., SUls, Cummis, Zuckerman, Radin, Tischman, Epstein & Gross Jason M. Schindler Harding Lawson Associates 302138 September 19, 1994 24231 2.C.5 Ms. Sherrel Henry Harding Lawson Associates U.S. Environmental Protection Agency Distribution Island Chemical Company, Inc. St. Croix, U.S. Virgin Islands Number of Copies 7 Copies Uiuted States Envhonmental Protection Agency (1 unbound) Chief, Eastern New York/Caribbean Superfund Section II Emergency and Remedial Response Division United States Envhonmental Protection Agencv 26 Federal Plaza, Room 747 New York, New York 10278 Attention: Virgin Island Chemical Site Project Coordinator 1 Copy Chief, New York/Caribbean Superfund Branch Office of Regional Counsel Uiuted States Envhonmental Protection Agencv 26 Federal Plaza, Room 437 New York, New York 10278 Attention: Virgin Island Chemical Site Attorney 1 Copy Government of the Vhgin Islands of the United States Department of Planning and Natural Resources Division of Environmental Protection Charlotte Amahs St. Thomas, U.S. Virgin Island 00802 Attention: Virgin Island Chemical Site Project Manager 3 Copies SUls, Cummis, Zuckerman, Radin, Tischman, Epstein & Gross One Riverfront Plaza Newark, New Jersey 07102-5400 2 Copies Harding Lawson Associates PhUadelphia, Pennsylvania 302139 .5.9 Remedial Investigation Report Following completion of all Remedial Investigation activllies, a draft Remedial Investigation report will be prepared and submitted to USEPA. The Remedial Investigation report will include the following: Executive Summary Discussion of the history of the site; Summary of previous investigations and remedial actions; Description of the site including the physical setting, climate, surface water hydrology, geology and soils; Summary of sampling locations and procedures; Discussion of deviations, if any, from the RIWP; Tabulated summaries of soil and groundwater quality data; Data on groundwater flow direction; Nature and extent of contamination, if any; Contaminant fate and transport, if applicable; • Summary of Baseline Risk Assessment activities; • Listing of ARARs; • Summary and conclusions; and • Recommendations regarding identification of other potential sources of contamination in the vicinity of the site. Appendices to the Remedial Investigation Report vnll include the following: • Technical memorandum on field activities; • Analytical data; • QA/QC evaluation results; and • Risk Assessment methods used. After consideration of USEPA's comments, the report will be finalized. • Revised per EPA Septemtier 19, 1994 \WORK\2423l\02\WORKPLAN.RVi HARDING UVWSON ASSOCIATES 4 2 # 302140 1 1 T«»k Nam* Effective Date o f A C O ^ ^ • ^ s a n d P r e p a r a t i o n f o r F i e l d Worlc ^ R c t P o t a b l e W a t e r S a m p l e I j i b o r a t o r y A n a l y s i s o f P o t a b l e W a t e r Data V a l i d a t i o n ( P o t a b l e W a t e r S a m p l e ) E P A R e v i e w o f P o t a b l e W a t e r R e s u l t s P r o j e c t P l a n n i n g a n d M a n a g e m e n t E P A K i c k o f f M e e t i n g M o n t h l y P r o g r e s s R e p o r t s B a c l ( g r o u n d I n v e s t i g a t i o n P e r m i t t i n g Site C l e a r i n g / R e c o n n a i s s a n c e Field S a m p l i n g P r o g r a m Soil Boring Program Lab Analysis of Soil Samples Well Installation/Rehabilitation • i Well Equilibration Well Survay C o n t i n u o u s W a t e r L e v e l M o n i t o r i n g Q u a r t e r l y G W S a m p l i n g a n d A n a l y s i s Data V a l i d a t i o n Data E v a l u a t i o n D e v e l o p / T r a c k A R A R s Data S u m m a r y R e p o r t ( D S R ) H y > w a y s A n a l y s i s R e p o r t ( P A R ) 8. Phase 1 B a s e l i n e R i s k A s s e s s m e n t S u m m a r y ^ ^ i R e v i e w o f D S R E P A R e v i e w o f P A R a n d B a s e l i n e R i s k A s s e s s m e n t S u m m a r y P r e s e n t a t i o n o f DSRVPARyRlsk A s s e s s m e n t S u m m a r y t o E P A a n d V I D P N R R e v i s e d P A R a n d R i s k A s s e s s m e n t S u m m a r y f o E P A Phase 11 R i s k A s s e s s m e n t (If n e c e s s a r y ) E P A R e v i e w o f P h a s e II B a s e l i n e R i s k A s s e s s m e n t S u m m a r y R e v i s e d P h a s e II R i s k A s s e s s m e n t t o E P A B e g i n P h a s e III B a s e l i n e R i s k A s s e s s m e n t (if n e c e s s a r y ) Rl R e p o r t ( a s s u m e s n o f u r t h e r i n v e s t i g a t i o n or P h a s e II R i s k A s s e s s . ) R e m e d i a l A c t i o n O b j e c t i v e s a n d S c r e e n i n g o f A l t e r n a t i v e s E P A R e v i e w o f R I R e p o r t E P A R e v i e w o f R A O / S O A Present R A O / S O A t o E P A a n d V I D P N R R e v i s i o n s t o R l . ; ' > Revise R A O / S O A B e g i n F e a s i b i l i t y S t u d y , If n e c e s s a r y M a n a g e m e n t o f I n v e s t i g a t i o n - D e r i v e d W a s t e Waste Sampling/Analysis Disposal Coordination Waste Removal Duo DDta 09/30/94 10/31/94 11/07/94 11/30/94 12/31/94 12/31/94 10/13/94 01/03/95 12/01/94 01/10/95 01/30/95 02/07/95 08/09/95 08/09/95 08/30/95 08/30/95 08/23/95 09/21/95 01/22/96 02/12/96 03/05/96 03/05/96 11/27/95 11/27/95 12/18/95 12/18/95 12/11/95 01/10/96 01/10/96 01/10/96 1004 Oct Nov • 1 Doc 1 1D0S Jan Fob Mar Apr May Jun Jul Auo S.p Del Nov D.C 1 Jan Fob Mar O 1 1 1 1 1 \ :.i jl • n=i 1 1 — 1 1 ' 1 fj 1 a • • • I 1 1 1 — 1 ^ — 1 : 1 1 1 — I ,,., , , 1 ["• 1 1 1 , , , i i u , 1 • ni ' 1 1 ' 1 1 n i ^ — 1 1 ' 1 1 1 n i ^ 1 1 ' ^. ' ' ' ' ' ' ' 1 \- 1 1 1 1 I I 1 1..., 1 i . 1 1 1 1 1 1 ' ' ' ' -^ ' ' ' ' ' ' ' ' ' ' ' ' 1 I •• -i'Z' • — 1 1 — ^ y J ' 1—1 - f j 1 1 , 1 r., .. • ^ 1 L P 1 : ' ' — 1 • I 1 1 o I • 1 p J . , i , 1 1 ^ 1 r- \ • - 1 1 1 ^ \ ' rl . • O 1 1 1 [ 1 p,,„ o • — n 1 f- - O :D o Apr [Notes: Figure 8-1 K. Schedule is based on months from approval of Consent Order and Work Plan W o r k Plan I m p l e m e n t a t i o n S c h e d u l e K. Schedule assumes final access agreements will be obtained within one month Island Chemical Company of USEPA approval. Schedule will require revisions if agreements cannot be St. Croix, U.S. Virgin Islands obtained in this time frame 13. Assumes weather-related delays will not exceed 1C .irking days total. ' •• Revised September 19,1994. | 302141