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Dames & Moore, 1999 - USDA Forest Service

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The historical data for samples collected in Holden Village were compared to the data collected during the<br />

RI. The soil samples collected in 1994 were not analyzed for molybdenum and uranium, and mercury and<br />

selenium were not analyzed in 1997; therefore, comparisons were not performed for these metals. The<br />

analytical data for the comparable list of analytes were well within an order of magnitude.<br />

The PCOCs in soil in Holden Village appear to be: arsenic at historical location HW-1A; beryllium at<br />

historical locations HV-4A and'HV-6~, and RI locations DMSS-1, DMSS-3, and DMSS-6; and iron at<br />

historical locations HW-IA, HV-3A, HV-4A, HV-6A and RI locations DMSS-2, DMSS-3, DMSS-4,<br />

DMSS-5, and DMSS-6; and aluminum at historical locations HV-lA, HV-3A, HV-4A; HV-6A and RI<br />

locations DMSS-3 and DMSS-6.<br />

5.2.3 Baseball Field<br />

One surficial soil sample (DMSS-25) was collected from within the baseball field area in October 1997<br />

(Figure 5.2-1). Analytical results are summarized in Table 5.2-1. Copper (63 mgkg) and 'iron (26,600<br />

mgkg) were detected above background (57.4 mgkg and 24,100 mgkg, respectively). The<br />

concentration of silver (0.5 mgkg) in the sample was equal to background. Copper and silver were below<br />

the MTCA Method B levels (2,960 mgkg and 400 mgkg, respectively). Iron was identified as a PCOC<br />

for this area.<br />

5.2.4 Maintenance Yard<br />

Four surface soil samples (DMSS-8, DMSS-9, Storage, and DMSS-lo), a field duplicate (DMSS-IOX) and<br />

three subsurface samples (DMSS-8, DMSS-9, and DMSS-10) collected at 2 feet bgs were collected during<br />

the RI. Sample locations are shown in Figure 5.2-1 and the analytical data are summarized in Table 5.2-1. 0'.<br />

Samples were analyzed for metals and organics (TPH, PCBs).<br />

5.2.4.1 Inorganic Results<br />

Arsenic, barium, cadmium, copper, iron, lead, molybdenum, nickel, silver, and zinc concentrations were<br />

above background in one or more surface samples. Concentrations were below MTCA levels with the<br />

exception of arsenic, cadmium, copper, and lead. The arsenic concentration detected in surface sample<br />

"Storage" (60 mgkg) was above background and the MTCA Method A (20 mgkg) cleanup level.<br />

Cadmium (9.4 to 21.6 mgkg) was detected in samples DMSS-8, DMSS-9, and "Storage" above<br />

background (5.4 mg/kg) and MTCA Method A (2 mag) level. Copper (3,160 mgkg) detected in<br />

sample DMSS-9 was above background (57.4 mglkg) and MTCA Method B (2,960 mgkg) level. Lead<br />

(1,070 and 392 mgkg) was detected in samples DMSS-8 and DMSS-9 above background (20.6 mgkg)<br />

and MTCA Method A (250 mgfkg) level. Iron ranged from 22,400 mgkg to 60,300 mgkg.<br />

Concentrations detected in samples DMSS-8, DMSS-9 and "Storage" were above background (24,100<br />

mf5'kg).<br />

Metal concentrations for aluminum, copper, lead, and zinc were above background in one or more<br />

subsurface samples. Concentrations for copper, lead and zinc were below MTCA levels. Aluminum<br />

(23,900 mgkg) detected in subsurface sample DMSS-10 was above background (20,900 mgkg).<br />

Generally, the data from surface and subsurface samples indicated that metal concentrations decreased<br />

with depth.<br />

\\DM-SEAI\VOLI\COMMOMWP\WPDATAU)OnREWRTSWOLDEN-2\RN-O.Qs 5-8<br />

17693-005-019Uuly 28, <strong>1999</strong>;I 1 :09 AMDRAFT FINAL RJ REPORT

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