REP16580

• Permit No: M1977215
• IBM Index Class Name: Report
• Doc Date: 1/21/1997
• Doc Name: CREEDE MINING DISTRICT CERCLA SITE INSPECTION
• From: CDOH
• To: DMG
• Media Type: D
• Archive: No

•
Comprehensive Analpical Results Report
East and West Willow Creek
As depicted in the text summary tables (Section 5.2), Nelson Creek sample SW-12 contained the
highest concentrations of total arsenic (61.20 µg/l) and dissolved and total iron (2890 µg/l, and
4420 µg/I respectively) of all surface water samples and SE-12 contained the highes[ concentration
of barium (8190 mg/kg) of all sediment samples. West Willow Creek sample SW-10 contained
the highest concentration of total cadmium (294 µg/1), total copper (279 µg/I), total lead (465 µg/l),
i. --
and total zinc (19,900 µg/I) of all surface water samples. I[ is interesting to note that for SW-10,
~ total metals concentrations greatly exceed dissolved concentrations suggesting that the water at this
_ __ _.~ location contained a significant amount of suspended material. This is the only sample collected
which exhibited this divergence.
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-. -.J
R~
~_= =x.3.2 Windy Gulch (SW/5E-14 through SW/5E-16)
~ Windy Gulch release samples SW/5E-15 and 16, located downstream from the Bulldog Mine
(9700' and 9360' levels, respectively) exhibit elevated concentrations for a number of analytes as
depicted in Tables 2, 3, and 4. Also, as depicted in the text summary tables (Section 5.2), these
samples exhibited the highest concentrations detected in the District in a number of instances.
SW-15 contained the highest concentrations of dissolved arsenic (26.6 µg11) and dissolved copper
(37.30 µg11) in the District and SW-16 contained the highest concentrations of dissolved cadmium,
manganese and zinc (54.9, 2330, and 4800 µg/1, respectively) in the District. Windy Gulch 5E-15
and 16 contained the highest concentrations for I1 out of the 12 metals which exhibit elevated
concentrations in the District.
Loading analyses indicate that Windy Gulch contributes to the metals load carried in Willow
Creek. Table 8 shows that the dissolved zinc load in Willow Creek increases from 258 ppd above
Windy Gulch (SW-28) to 319 ppd below Windy Gulch (SW-29), an increase of 61 ppd and that
Windy Gulch is adding 64 ppd dissolved zinc to Willow Creek. Similarly, dissolved cadmium load
increases from 2.04 to 2.74 ppd between SW-28 and 29 and Windy Gulch in contributing .73 ppd.
Conversely, an increase in dissolved lead load between SW-28 and 29 from 2.94 to 5.23 ppd can
not be attributed to Windy Gulch.
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