HYDRO25324

• Permit No: M1988112
• IBM Index Class Name: Hydrology
• Doc Date: 12/22/2000
• Doc Name: MEMO NOTICE OF ISSUANCE OF THE PERMIT FOR BATTLE MTN GOLD CO-0045675
• From: CDPHE
• To: ATTENDEES AT THE PUBLIC MEETING ON THE BATTLE MTN PERMIT CO-0045675
• Media Type: D
• Archive: No

P~9e;
COLORADO DEPARTMENT OF HEALTH, Water Quality Control Division
Rationale -Page 8 Permit No. CO-0045675
1. pischaroe Monitoring Reports and Sel/-Monitored Reg Data: (continued)
Since the initial time of startup, treated discharge samples have been collected on a weekly basis and
analyzed for the parameters indicated in Table V-1. During the period July 13, 2000, through August 1,
2000, the analytical results of several effluent samples (7/13/00-0.013 mcy1, 7!24/00-0.048 mcy1, 7l2fi/00-0.017
mgq, 7/30/00-0.139 myl, 8/01/00-0.052 mgr!) (or potentially dissolved (PD) lead appeared to be conlamir~ated
6y the nttric acid preservative that was added to the sample in accordance with U. S. Environmental Protection
Agency (EPA) guidance to comply with EPA sample co//action holding time protocols. During the period
7!28/00 through 7/30/00 split sampling of effluent samples was conducted to evaluate possible sample
preservative contamination. Spill samples (i.e., one sample preserved and one sample un-preserved) were
immediately delivered to a local EPA certified analytical laboratory and the samples were analyzed (or PD lead
within 24 hours of sample collection to ensure compliance with EPA holding time protocols. Compadson of the
analytical results associated with these split sampling activities identifies the following:
Sample Collection 7l2tY00 Preserved analytical result - 0.017 myl
Un-preserved analytical result - <0.001
Sample Collection 7/3(Y00 Preserved analytical result- 0.139 mgr!
Unpreserved analytical result - <0.001
Each o/the noted Daily Maximum and Monthly Average Effluent Tdgger exceedances appear to be
associated with this apparent nitric acid preservative contamination problem. Alt analytical irregularities were
associated with a single lot of preservatives used during the period July 13, 2000 through August 1, 2000.
This lot o/nitric acid preservative was consumed with the August 1, 2000 sample collection. Pdor to and since
this pedod o/time, eltluent analyfica! results reflect no similar concentrations or trends. All potentially
dissolved lead analytical results either prior to or since this pedod o/time have been either 0.002 mg/I (3
samples) or less than the analytical detection level (<0.001). There were two exceedances o(pH laboratory
analytical trigger levels during installation and startup; however, field pH readings were in compliance with the
pH Mgger levels. These apparent laboratory exceedances are indicated in the /ootnotes 'and # below which
follow Table V-1. As indicated in the following ta61e dudng the period after the initial start-up pedod, no
exceedances of the Mgger levels established in the NOV/CDO have occurred. The trigger levels are equal to
the water quality standards for segment 28. Table V-1 includes a summary of the reported discharge data
/rom 10.13-1999 through 11-16-2000.
Table V•1 -Self-Monitoring Results
Constituent Number of
Effuent
Samples MeanEflluent
Concentration
(mgr!) Range o/
Effluent
Concentrations
(mcyl) Existing
NOVA:DO
Tripper Levels
(30-Day
Average/Daily
Maximum) Number of
Exceedance
s of the
Monthly
Average
Effluent
Tdgger
Level Number of
Exceedance
s of the
Daily
Maximum
EtBuent
Trigger
Level
Total Arsenic 49 0.001897 <0.001-0.019 0.05/Re rt 0 N/A
Pot. Dis. Cadmium 49 0.00000014 <0.0001-0.0001 0.0008/0.002 0 0
Dissolved Copper 49 0.000691 <0.001-0.011 Re rt/Report N/A N/A
WAD C nide 49 <0.01 <0.01 Report/Report WA N/A
Fluoride 60 0.889 <O.S3.83 Re rt/Re rt N/A N/A
Dissolved Imn 49 0.01498 <0.01-0.094 0.30/Re rt 0 N/A
Poten6all Dis. Lead 68 0.00467 <0.001-0.0139 0.002!0.047 2• 3'
Dissolved Ma anese 60 0.010 <0.001-0.089 O.OSIRe rt 0 N/A
Total Mercury 49 <0.0001 <0.0001 0.00001/Repo
rt 0 WA
Pot. Dis. Nickel 49 0.00016 <0.001-0.006 0.06810.659 0 0
Tot. Recov. Selenium 49 <0.00038 <0.001-0.005 Re N0.01 N/A 0
Suttate 60 67.72 1.5374.1 250/Re rt 0 N/A
Poten6allyDis.Silver 49 <0.0002 <0.0002 0.00003/0.000
9 0 0
Poten6all Dis. Zinc 49 0.0019 <0.005-0.012 0.073/0.08 0 0