NYC-WTC_000205688

NYC 9/11 Public Portal Document

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1= 8,500 - 43,000 50.0 SB 'otassium [N/A ♦♦

[Selenium JN/A io:i-3.9 0.05 2 or SB i3S3SSSa=±=SSE

Silver ~ J|n/A 0.1 SB [Sodium ||n/A '1(6,000-8,000 Ko SB ssss

[ThaUiuna |br/A N/A SB |Vanadium|lN/A IS 150 or SB [Zinc ISZA 9-50 0.2 20 or SB asBBBBsaassss

Note: Some forms of metal salts such as Aluminum Phosphide, Calcium Cyanide, Potassiur .. Cyanid: Copper cyanide, Silver cyanide, Sodium cyanide. Zinc phosphide, Thallium salts, Vanadium pentoxide and Chromium (VI) compounds are more toxic in nature. Please refer to the USEPA HEASTs database to find cleanup objectives if such metals are present in soil. SB is site background N/A is not available * CRDL is contract required detection limit which is approx. 10 times the CRDL for waler. ♦* New York State background •** Some forms of Cyanide are complex and very stable while other forms ate pH dependent and hence are very unstable. Site-specific fonn(s) of Cyanide should be taken into consideration when establishing soil cleanup objective. *♦** Background levels for lead vary widely. Average levels in undeveloped, rural areas may range from 4-61 ppm. Average background levels in metropolitan or suburban areas or near highways are much higher and typically range from 200-500 ppm. «***$ Recommended soil cleanup objectives are average background concentrations as repeated in a 1984 survey of reference material by E. Carol McGovern, NYSDEC. «E B

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NYC-WTC_000205690