|
Welborn Sullivan Meck&Tooley&Leadville Sanitation 4
<br /> June 9,2023
<br /> Table 2: CDPHE Sampling Requirements/Protocols
<br /> Protocol Method&Description Anal tes Sampled
<br /> SM SM2540C, Solids,TDS Total Dissolved Solids
<br /> SM SM4500 H+ B PH Immediate Hold Time
<br /> EPA 1664B Oil&Grease, N-Hexane Extractable Material
<br /> SM SM 4500 O G Oxygen, Dissolved—Immediate Hold Time
<br /> SM SM2320B,Alkalinity Alkalinity, Bicarbonate Alkalinity as CaCO3,
<br /> Carbonate Alkalinity as CaCO3, Hydroxide
<br /> Alkalinity
<br /> SM SM2540D, Solids,TSS Total Suspended Solids
<br /> SM SM2340C, Hardness Total Hardness
<br /> SM SM5210B, BOD, 5 Day Biochemical Oxygen Demand
<br /> EPA 1 410.4,COD Chemical Oxygen Demand
<br /> SM SM3500, CR B Hexavalent Cr Hexavalent Chromium
<br /> SM SM2300, CR B Trivalent Cr Trivalent Chromium - Calculation from
<br /> Hexavalent Cr&Total Cr.
<br /> EPA 420.4, Phenols Total Phenols
<br /> Nitrogen Total Organic Nitrogen — Calculation requires
<br /> TKN&Ammonia.
<br /> MCAWW 350.1, Nitrogen,Ammonia Nitrogen,Ammonia
<br /> MCAWW 351.2, Nitrogen,Total K'eldahl Nitrogen
<br /> EPA 245.1, Mercury CVAA) Mercury
<br /> MCAWW 300.0,Anions, Ion Chromatography Chloride, Nitrate as N, Fluoride,Sulfate
<br /> SM SM4500 S2 D, Sulfide Sulfide
<br /> SM SM4500 Cl-E, Chloride Chloride
<br /> SM SM4500 SO4 E, Sulfate Sulfate
<br /> SM SM4500 CN E, Cyanide Total Cyanide
<br /> SM SM4500 CN I, CN WAD Cyanide,Weak Acid Dissociable
<br /> EPA 365.1, Phosphorus,Total Total Phosphorus
<br /> EPA 200.7, Rev 4.4, Dissolved Metals Aluminum, Iron, Manganese
<br /> EPA 200.7, Rev 4.4, Dissolved Metals Boron
<br /> EPA 200.8,Total Metals Arsenic, Chromium, Cobalt
<br /> EPA 200.7, Rev 4.4,Total Recoverable Metals Iron, Manganese
<br /> EPA 200.8,Total Recoverable Metals Cadmium, Copper, Lead, Nicekl, Silver,
<br /> Uranium,Zinc, Selenium
<br /> EPA 200.8, Potentially Dissolved Metals Copper, Lead, Nickel, Silver,Zinc
<br /> EPA 903.0, Radium 226 Radium 226
<br /> EPA 904.0, Radium 228 Radium 228
<br /> As discussed with Leadville Sanitation earlier, UMC is open to sharing testing results.
<br /> UMC's upstream testing of California Gulch is also upstream of the WWTF. Perhaps
<br /> these is synergy in sharing these data.
<br /> 2. The threat of infiltration into the sewer system is only possible from the filtered tailing
<br /> deposit (FTD) which is upgradient from the sewer line. There can be no infiltration from
<br /> other process plant infrastructure since these facilities are both down-elevation and
<br /> downgradient from groundwater flows. See figure showing location of the sewer line and
<br /> contours. The FTD is shown in green, the catchment pond in dark blue, and the sewer
<br /> line in light blue.
<br /> By code, the FTD (which includes the catchment pond) will be doubled lined with leak
<br /> detection to protect groundwater. Additionally, new up- and down-gradient wells will be
<br /> drilled to specifically monitor groundwater quality around the FTD. Groundwater
<br /> infiltration from the FTD, in the unlikely event it occurs, will be detected by this
<br /> monitoring system and will be the responsibility of UMC, not Leadville Sanitation. In
<br />
|