2007-02-02_HYDROLOGY - M2004078

• Permit No: M2004078
• IBM Index Class Name: HYDROLOGY
• Doc Date: 2/2/2007
• Doc Name: Draft water quality baseline report ‎(part 1)‎
• From: Brad L Hagen
• To: DRMS
• Email Name: CBM
• Media Type: D
• Archive: No

The iron levels are significantly higher from the samples where total iron was determined. Since the groundwater
samples have a significant amount of sediment and a large portion of the total iron concentration originates from the
sediment in the groundwater samples, the dissolved iron concentration should be determined for compliance sampling.
The sediment causes a larger standard deviation in laboratory results for total iron levels and the drinking water
standards are based on dissolved metals. The average result for dissolved iron is 0.68 mg/L with a standard deviation of
0.09. Based on the groundwater sampling plan approved by the DMG, a site wide average may be used plus 1 standard
deviation to establish background levels. This will establish a site wide baseline dissolved iron concentration of 0.77
mg/L.
3.2.2 Sulfate
Sulfate concentrations exceeded SDWS three times during all of the sampling events from October 2005 to October
2006. The sulfate concentration in CRMW01 of 263 mg/L exceeded the SDWS of 250 mg/L in October of 2006. The
sulfate concentration in CRMW03 reported in November 2005 was 332 mg/Land the sulfate concentration in CRMW05
reported in November 2005 was 265 mg/L. In general, the sulfate concentrations-vary seasonally and mimic the
seasonal variation of the nitrate concentrations. The highest overall sulfate concentrations are found in the northwest
corner of the site directly downgradient of cultivated farm fields. The highest concentration of sulfates can generally be
found in wells CRMW01 and CRMW02.
Sulfate
•
•
We lls (CRM W) Site/
01 02 04 05 O6 07 09 16 40 41 42 Grou
Oct-05 194.4 203.7 150.9 ----- 220.3 189.9 ----- ----- 173.8 176.4 ----- 187.06
Nov-05 216 238 223 265 240 209 135 249 192 216 227 219.09
Dec-05 208 222 223 ---- 220 199 ----- ----- 186 213 ----- 210.14
Apr-06 206 211 246 ---- 215 192 ----- ----- 171 213 ----- 207.71
Jul-06 227 217 139 ---- 224 181 ----- ----- 149 215 ----- 193.14
Oct-06 263 249 201 151 171 228 181 234 208 222 230 212.55
Average 219.07 223.45 197.15 208.00 215.05 199.82 158.00 241.50 179.97 209.23 ---- 206.69
Stnd Dev. 24.10 17.05 43.03 80.61 23.22 16.69 32.53 10.61 20.22 16.42 ---- 30.33
Baseline 243 240 240 289 238 217 191 252 200 226 0 237
The average result for sulfate is 206.69 mg/L with a standard deviation of 30.3. Based on the groundwater sampling
plan approved by the DMG, a site wide average may be used plus 1 standard deviation to establish background levels.
This will establish a site wide baseline sulfate concentration of 237.0 mg/L.
3.2.3 Tofal Dissorved Solids
Total dissolved solids (TDS) consistently were above the SDWS. TDS concentrations generally ranged from 600 up to
1200 mg/L. There are no apparent temporal or spatial trends identified with the total dissolved solid concentrations
reported to date.
Annual 2006 Sampling Event -Lupton Lakes -6- January 2007