Soil, Sediment, and Surface Water Sample Map and Analytical Data Table

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Summary of Soil Analytical Data–Nahant Marsh Site
February 1997
EPA Sample
Number		 Sample Location Lead*
contamination
(mg/kg)
101 Shot outfall, 0-2" 164
104 Shot outfall, 0-2" 126
106 Shot outfall, 0-2" 619
107 Shot outfall, 0-2" 5,240
108 Shot outfall, 0-2" 10,600
112 Shot outfall, 0-2" 26,400
113 Shot outfall, 0-2" 8,010
114 Shot outfall, 6-9" 16.3
115 Shot outfall, 0-2" 32,700
116 Shot outfall, 0-2" 13,700
118 Shot outfall, 0-2" 40,100
109 Background, 0-2" 15.1
110 Background, 3-6" 18.4
111 Background, 6-9" 23.7
*Other contaminants detected in the analysis were arsenic, silver, and antimony.
For the purposes of this study, those data are omitted here.

Summary of Sediment Analytical Data–Nahant Marsh Site
February and July 1997
EPA Sample
Number*		 Sample Location Lead**
contamination
(mg/kg)
117 Sediment, Line #3, 200', 6-9" 9.4
119 Sediment, Line #1, 200', 0-3" 27.3
005 Sediment, Shot outfall area 726,000
006 Sediment, Upgradient of shot outfall area 73.2
007 Sediment, Downgradient of shot outfall area 31
008 Sediment, Downgradient of marsh at confluence with Mississippi River 16.3
* Samples 117 and 119 were collected in February 1997
and samples 005 through 008 (italicized) were collected in July 1997.
*Other contaminants detected in the analysis were
arsenic, silver, antimony, and polynuclear aromatic hydrocarbons.
For the purposes of this study, those data are omitted here.

Summary of Surface Water Analytical Data–Nahant Marsh Site
February 1997
EPA Sample
Number  		 Sample Location   Contaminants (µg/L)
Total Lead Dissolved Lead Total Hardness¹
001/005/010 Above the Shot Outfall Area 35.3 0.80 149
002/006/011 Near I-280 0.557u 0.557u 320
004F/009/F Trip Blank 3.4u 0.557u NA
Key:
NA = Not Analyzed;
¹ = Total hardness is in milligrams per liter (mg/L);
u = Concentration was below the method detection limit.