2014-08-11_HYDROLOGY - M1977208

• Permit No: M1977208
• IBM Index Class Name: Hydrology
• Doc Date: 8/11/2014
• Doc Name: Second Quarter 2014 Monitoring Data
• From: CEMEX
• To: DRMS
• Permit Index Doc Type: Hydrology Report
• Email Name: MAC
• Media Type: D
• Archive: No

TR-12 Trigger Parameters
The analytical results CEM-004 and CEM-005 were compared to the target levels identified in TR-12,which represent 90%
of the Average C-Pit Cation-Anion Signature. The TR-12 trigger levels are shown in Table 2 for reference.
Table 2:TR-12 C-Pit Monitoring,Trigger Parameters and Concenetrations
c-anc.cw�-A�wnsf9n,mr.wre,eac Co
ncentration Analyte/Parameter Trigger Concentration
(mg/0
H 6.5-8.5
Chloride 1,053
Sulfate 2,641
Total Dissolved Solids 501-10,000 or 1.25 times
background
Selenium 0.05
Pd°sum Ch-
Thallium 0.002
so4mm su°.,
,00 so o so too
Data Evaluation
As shown on Table 1, results for the monitoring parameters were below/within with the target concentrations except for
chloride and total suspended solids in CEM-005 on May 15, 2014. Figures 2 and 3 are Stiff Plots for CEM-004 and CEM-005,
comparing the monitoring-well cation-anion signature to the average C-Pit concentration that was identified in TR-12.
v IGEM 003'n C-Pt Averay sj
c C P4 Avwages', -
lyre
Orr rwy ,r.,'
cpm.n.ry ran
abum ._.
alc�um CEA1004 Bicarbonate
B�carbonale
(as CaCO3 as CaCO3
/ agneslum Carbora'e
agnes�um Carbonate
ctasmm Chloride otasium Chloride
Sod.um I Sulfate 'um . Bull
a0 60 4o 20 0 20 40 60 eo 1 200 160 160 140 120 too M 60 40 2n [) 20 40 so 80 too 120 140 1e0 1e0 200
Figure 2:CEM-004(Report against Triggers) May 15,2014 Figure 3:CEM-005(Compliance Well) May 15,2014*
*Note: this data is not considered to be
representative, but is reported here for
completeness.
The following is an evaluation of the second quarter analytical data from Wells CEM-004 and CEM-005:
• CEM-004:As shown in Table 1 and Figure 2,all parameters in alluvial well CEM-004 were within the trigger
concentrations.
• CEM-005: As shown in Table 1 and Figure 3,two parameters from the May 15, 2014 sample collected from CEM-005 are
outside of the compliance triggers:chloride is>1053 mg/I and total dissolved solids(TDS)is greater than 10,000 mg/l.
While the CEM-005 sample results are provided in this quarterly report for information,the CEM-005 data from May and
June 2014 are not considered to be valid or representative due to deviations from standard sampling protocols for
groundwater.
2