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rife' ^DRAFT VOLUME 2 OF 2
NOV'o4l991*flvw tlt't'n't*'1 i
I'ivilIliil3'uniII
REMEDIAL INVESTIGATION REPORTDU FONT-NEWPORT SITENEWPORT, DELAWARE
For:
U.S. Environmental Protection AgencyRegion 3841 Chestnut StreetPhiladelphia, Pennyslvania 19107
Prepared for:
E.I. du Pont de Nemours and Company, Inc.Du Pont ChemicalsBOD 918-141007 Market StreetWilmington, Delaware 19898November 1, 1991
Woodward-Clyde Consultants5120 Butler PikePlymouth Meeting, PA 19462
Project No. 88C2976-4W R D Q I I 5 9 i
Woodward-Clyde Consultants
TABLE OF CONTE
VOLUME 2
LIST OF APPENDICES
APPENDIX A GROUND WATER CONCENTRATION CONTOUR MAPS
APPENDIX B TIME VERSUS CONCENTRATION PLOTS
APPENDIX C AQUEOUS EQUILIBRIA MODELING
APPENDIX D RESIDENTIAL WELL DATA
APPENDIX E RESPONSE LETTER TO EPA, REGARDING EPACOMMENTS ON PHASE IE RI DSR
APPENDIX F ANALYTICAL RESULTS OF 009 OUTFALLSAMPLING
ftR3l1592
Appendix A
1R3II593
APPENDIX A
GROUNDWATER CONCENTRATION CONTOUR MAPS
Woodward-Clyde Consultants
APPENDIX A
GROUNDWATER CONCENTRATION CONTOUR MAPSREMEDIAL INVESTIGATIONDU FONT-NEWPORT SITE
Concentrations of the five target parameters identified at the Site (barium, zinc, cadmium, PCE,and TCE) were contoured for each of the five well groupings and for four of the five sampledates between August, 1987, and November 1990. Due to the limited number of monitoringwells sampled during November 1988 and the presence of a complete round of samplecollection during December 1988, the November 1988 data were not contoured.
These contours were generated initially by computer and then adjusted accordingly by hand toeliminate interpretations made by the computer that were obviously inappropriate.
Some well groupings, such as the Columbia Formation zone, have a limited number of datapoints for the earlier data. In the case where there were only a few data points, the data wereposted but not contoured.
RIRpt/AppxA/Newport/88C2076-4W/DPm 10/25/91
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CONCENTRATION
CONT
SHALLOW ZONE
DECEHBER 198
DUPOWT -
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Appendix F
1887
Woodward-Clyde Consultants
APPENDIX F
ANALYTICAL RESULTS OF 009 OUTFALL SAMPLING
SENT BY:ENVIRONMEXTAL REMED. -11- 1-91 ; ?:sow •- DLPO.NT- PLYMOLTH MEETING:* 2,- 3Un.ieriEnffinft.rs „, ... ••4 Consructors Inc ~'
- 1-31 :
r
DuPont Environmental Remediation ServicesMr. Joel Karmazyn -Page Two
The Fecal Coliform Analysis was performed by MEDLAB of Wilmington,Delaware. Your sample was analyzed in duplicate. The results were