2010-08-02_REVISION - M1977300 ‎(32)‎

• Permit No: M1977300
• IBM Index Class Name: REVISION
• Doc Date: 8/2/2010
• Doc Name: New Amend.- EPP- Water Quality Monitoring Plan.
• From: Cotter Corp.
• To: DRMS
• Type & Sequence: AM2
• Media Type: D
• Archive: No

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Cotter Corporation PROCEDURE Number: 34
Schwartzwalder Mine Page: 4 of 9
Golden, Colorado WATER MONITORING Revision: 8
Date: 08/01/2010
2) Pour an aliquot (e100mQ of sample into filter cup; filter aliquot; and rinse flask and final
sample container with filtrate.
3) Filter at least 100mL of sample and preserve.
4) Triple rinse filtration apparatus with DI water.
2.3.2.2 On-Site Laboratory Filtration Methods
On-site Laboratory Filtration for filtration of sample volumes greater than 1 liter.
Equipment: Plate-filter holder; Peristaltic pump; 4 Liter capacity graduated cylinder; 0.45 urn membrane
filter 102 mm diameter.
1) After initial cleaning, assemble filter plate with clean filter. Attach pump discharge to filter inlet
and discharge line to filter outlet. Place pump intake line in sample to be filtered and begin
pumping, taking care to avoid sucking off the container bottom.
2) Set pump rate at level that will not overload filter capabilities and flush the filter apparatus by
filtering approximately 200 mL to waste.
• 3) Place filter discharge in clean graduated cylinder and filter desired sample volume. Note: Samples
requiring Ra 226 analysis must contain a minimum of 3 liters final volume (filtrate).
4) Remove filter(s) and thoroughly flush filtration apparatus with deionized water. Retain filter(s) if
suspended analysis is desired and record the total volume filtered.
2.3.3 Sample Preservation
Acidify all samples to pH < 2 with the indicated acid as specified in Section 2.2. For all filtered samples,
acidification should be performed only after filtration. For the unfiltered cyanide analysis sample (0.5
liters), add NaOH base to pH > 12.
2.3.4 Laboratory / Analysis
Samples are to be analyzed for dissolved and/or total phases of applicable analytical parameters as
indicated in Sections 2.0 and 2.1 by a qualified and State-accepted laboratory. Samples are assigned a
number which corresponds to a sample submittal form (Exhibit 2-5A). The form is used to document the
date and time of sample collection, sampler, and the requested analyses (for "extended suite" analysis
requests, attach Table 1 and reference this table in the analytical request section to insure that all
applicable parameters are ordered). Analytical results are reviewed by the RSO, forwarded for computer
entry, and then filed in the Environmental Department files.
If using a commercial laboratory, use the Chain of Custody (COCs) forms provided by the third-party lab
(for "extended suite" analysis requests, attach Table 1 and reference this table in the analytical request
section to insure that all applicable parameters are ordered).
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