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2007-08-31_REVISION - M1977208
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2007-08-31_REVISION - M1977208
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Last modified
6/16/2021 6:29:24 PM
Creation date
11/21/2007 10:03:38 AM
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Fields
Template:
DRMS Permit Index
Permit No
M1977208
IBM Index Class Name
Revision
Doc Date
8/31/2007
Doc Name
TR-09, Submittal
From
Cemex
To
DRMS
Type & Sequence
TR9
Media Type
D
Archive
No
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C-PIT Hydrogeologic Investigations <br />Technical Revision No. 8 <br />3: Observations and Results <br />concluded that the water in C-Pit dropped nearly one foot sometime after June 14th before the rising trend <br />recommenced. <br />3.1.2 Field Parameter Water Quality Data <br />In addition to hydraulic head, the In-Situ Multipazameter Troll 9500 data logger units also collected field <br />parameter data on pH, temperature, dissolved oxygen (as milligrams per liter, or mg/L), conductivity (as <br />tnilliSiemens per centimeter ox mS/cm), and oxidation/reduction potential (or ORP, as millivolts ox m~. <br />Figures 7 and 8 summarize these data fox C-Pit and CEM-001, respectively. These data in combination with <br />the data from analytical laboratory analysis of water samples confirm that no adverse chemical impacts were <br />detected at CEM-001 during the filling of C-Pit. <br />Figure 7, the water quality field parameter data collected and plotted fox C-Pit, shows that several of the data <br />logger sensors axe sensitive to movement and disturbance. The discontinuities in the data plots axe from <br />disruptions due to raising the elevation of the logger to accommodate the rising water in C-Pit. The ORP <br />sensor is the most obvious example of this phenomenon. Most notably, the pH of C-Pit water dropped <br />during the filling process, from a high of over 12.5 on March 16, 2007 to less than 8.7 by June 13, 2007. The <br />YSI 650 MDS/600XL multi-parameter water quality meter confirmed that the pH in C-Pit water had been <br />lowered during the Filling process from 12.5 to less than 8.5 by field measurements taken on June 15 and July <br />10, 2007. <br />' Field measurements taken with the YSI meter did not confirm the ORP data from the C-Pit data logger, and <br />therefore the quality of these data axe suspect. <br />Inspection of the data plots depicted in Figure 8 for monitoring well CEM-001 indicates that the data trends <br />axe more stable than those for C-Pit water. (Note that the data gap depicted in the middle of Figure 8 is due <br />to the battery failure m the data logger unit on May 3, 2007.) All parameters held essentially constant and <br />remained within a nazrow range during the entire period of data collection during the tilling of C-Pit. <br />3.2 Groundwater and Surface Water Sampling Results <br />One surface water and 16 groundwater samples were collected over multiple sampling rounds at the Site since <br />March 9, 2007. The samples were analyzed for the following water chemistry analyzes: <br />bromide, chloride, fluoride, and sulfate by Environmental Protection Agenry (EPA) method 9056; <br />alkalinity, carbonate, and bicarbonate by EPA method 310.2; <br />dissolved calcium, dissolved magnesium, dissolved potassium, and dissolved sodium by EPA method <br />6010 B; <br />thallium by EPA method G020; <br />selenium by EPA method 6020 as modified for inductively-coupled plasma dynamic reaction cell mass <br />spectrometry (ICP-DR-MS). <br />Table 2 summarizes the analytical results. Also shown on this table are the field pH measurements from <br />either the Brown and Caldwell YSI meter ox the CEMEX plant pH meter. Analytical laboratory reports are <br />included as Appendix A to this report. <br />The YSI meter confirmed the drop in C-Pit water pH indicated by the C-Pit data logger, from 12.5 to less <br />than 8.5. Selenium levels in C-Pit, however, remained at approximately 0.5 mg/1 during the investigation. <br />' 3-2 <br />Use of contents on this sheet is subled to the limitations specified el the end of this document. <br />\1BCDEN021pmjectslDalalGEN\CemexlTR-l9Reporting',CEMEX Report 0831-07 doc <br />
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