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Dames & Moore, 1999 - USDA Forest Service

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'<br />

Wilderness Boundary<br />

Two soil samples were collected near the wilderness boundary. The results of the screening for this<br />

exposuk area are presented in Table 7.1-9. All constituents were eliminated as IHSs based on this<br />

screening<br />

Maintenance Yard<br />

Four surface soil samples were collected throughout the maintenance yard and in the storage area. The<br />

results of the screening for this exposure area are presented in Table 7.1-10. Based on this screening. the<br />

following constituents were selected as MSs: arsenic, cadmium, copper, lead, and total petroleum<br />

hydrocarbons (gasoline range, diesel range, and motor oil range).<br />

Lagoon Area<br />

Two soil samples were collected in the lagoon area The results of the screening for this exposure area are<br />

presented in Table 7.1-1 1. Based on this screening, the following constituents were selected as IHSs:<br />

beryllium, cadmium, copper, lead, and zinc and total petroleum hydrocarbons (diesel range and motor oil<br />

range).<br />

USFS Guard Station<br />

One historical sample was collected near the USFS guard station (sample designated as Winston Homesite).<br />

The results of the screening for this exposure area are presented in Table 7.1-12. Based on this screening,<br />

the only constituents selected as an INS for this area were arsenic and beryllium.<br />

Particulate Emissions from Surface Soil<br />

Each soil exposure area screened for ingestion (Section J-3.1.3.1) was also screened for particulate<br />

emissions potential. Results are detailed below.<br />

Holden Village<br />

The results of the particulate emissions screening for this exposure area are presented in Table 7.1 - 13. The<br />

only constituent selected as an IHS based on the screening was chromium. Copper, lead, molybdenum,<br />

silver, zinc and cyanide did not have health-based MTCA Method A or Method B levels (due to an absence<br />

of inhalation toxicity criteria) which could be used for screening. While these constituent concentrations<br />

appear to be elevated, they are not expected to present an unacceptable risk to receptors via the inhalation<br />

route at the concentrations present particularly, given the short expected exposure period and ground covers<br />

present in this area.<br />

Village Venetable Garden<br />

The results of the particulate emissions screening for this exposure area are presented in Table 7.1-14. All<br />

constituents were eliminated as IHSs based on this screening. Copper, lead, molybdenum, silver, and zinc<br />

did not have health-based MTCA Method A or Method B levels (due to an absence of inhalatiin toxicity<br />

criteria) which could be used for screening. While these constituent concentrations appear to be elevated,<br />

'

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