rife' ^ draft volume 2 of 2rife' ^ draft volume 2 of 2 nov'o4l991 flvw tlt't'n't'1 i...

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


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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Appendix F

1887


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

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