Dames & Moore, 1999 - USDA Forest Service

During the mine reclamation activities at the Site which included covering much of the tailings deposirs
with gravel and introduction of vegetation, an air quality study at the Sitewas conducted by the USFS in
1994 to provide the EPA with additional data required for the Preliminary Assessment of the Site conducted
in the same year. The study was completed by Air Resource Specialists under contract with the USFS and
audited by the Washington State Department of Ecology. The results of that study along with associated
quality assurance data were presented to the USFS in a preliminary data transmittal report in December
1994 (Air Resource Specialists, 1994). The study consisted of eight particulate monitoring stations: (1) one
up-valley background monitoring site; (2) three on tailings piles; (3) one between tailings piles; (4) two in
the community of Holden Village; and, (5) one down-valley from the village and tailings piles, to the east.
Monitoring began on July 3 1 and ended October 15, 1994.
The results of the particulate sampling indicated that maximum particulate concentrations were detected in
downwind sampling locations the majority of the time. The wind direction was predominantly fiom the
west, down the valley toward Lake Chelan. However, during the morning and evening transitional periods
winds from the east toward the west were not uncommon. The highest concentrations of particulates were
detected in the monitoring stations near the tailings piles. Selected particulate samples collected at seven of
the eight monitoring stations on September 23 and 29 were analyzed using EPA SW-846 methodology for
metals (aluminum, barium, calcium, copper, iron, lead, magnesium, manganese, potassium, sodium, and
zinc). A summary of the results of these analyses is provided in Table 5.7-1. These data are evaluated in
the Human Health Risk Assessment in Section 7.0.
Additional air monitoring data were not collected during the RI.
5.8 ASBESTOS
Three samples were collected in October 1997 fiom the mill building wall insulation material to determine
if asbestos-containing materials were present. Two samples were collected of the insulation, and one
sample was collected of the mortar covering the insulation material. The samples were submitted to EMSL
Analytical, Inc., in Seattle, Washington, for bulk asbestos analysis by polarized light microscopy (PLM).
Asbestos was not detected in any of the samples. The data are provided in Appendix L.
5.9 WINSTON HOMESITE UNDERGROUND STORAGE TANKS
A reconnaissance of the Winston home site area was performed to determine the number of remaining
underground storage tanks in the area. Approximately 38 USTs were observed in the area. Fuel product
is suspected to be present in some of the USTs. However, it is understood that the majority of fuel may
have been removed for use in Holden Village. A more thorough discussion of the results of tank
inventory was provided previously in Section 4.2.
Seven testpits were completed from 3.5 to 8 feet below ground surface (bgs) on the south perimeter of the
home site area to assess the potential presence of petroleum hydrocarbons related to the USTs in the
Winston area. Information related to the test pits was provided previously in Section 4.2. No indications
of petroleum hydrocarbons were noted in the test pits; thus, samples were not collected for chemical
analyses.
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17693405-019Uuly 28.1999:11:09 AMDRAFT FINAL RI REPORT