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April 2014 17 10381640A <br />SPLP testing was performed as part of the Golder and Secor programs. The SPLP testing was conducted <br />on four samples of CKD, one sample of silt, four samples of limestone and two samples of sandstone. <br />The analytical results for the SPLP leachate analysis are tabulated in Table 12, and the laboratory <br />analytical reports are provided in Appendices D and E. Schoeller diagrams are provided in Figure 5 <br />through Figure 8. <br />The CKD material samples exhibited trace metal SPLP leachate concentrations that were at least an <br />order of magnitude higher than the native material samples for: arsenic, barium, chromium, lead, lithium, <br />selenium and thallium. The CKD material samples exhibited trace metal SPLP leachate concentrations <br />that were similar to the native material samples for: copper, iron, manganese, sodium, uranium and zinc. <br />The CKD material samples exhibited major ion SPLP leachate concentrations that were one to two orders <br />of magnitude higher than the native material samples for: alkalinity, calcium, fluoride, potassium, nitrate, <br />nitrite and sulfate. The CKD material samples exhibited major iron SPLP leachate concentrations that <br />were similar to the native material samples for: chloride, magnesium and sodium. The pH values of the <br />CKD material samples SPLP leachate were higher than the native material samples and ranged from <br />12.3 to 12.5. The pH values of the native material samples exhibited pH values that ranged from 7.7 to <br />10.2. The TDS concentrations of the CKD material samples SPLP leachate were higher than the native <br />materials and ranged from 4,830 to 5,230 mg /L. The TDS concentrations of the native materials ranged <br />from 50 to 2,250 mg /L. The SPLP leachate for the silt sample collected from MW -5 exhibited conductivity <br />and TDS values that were similar to the CKD material sample and were an order of magnitude greater <br />than the limestone and sandstone samples. <br />4.2.3 Sequential Batch Testing <br />Secor performed sequential batch testing on the leachates produced by the SPLP tests as part of their <br />1998 hydrogeologic and geochemical assessment. The analytical methodology and results for the <br />sequential batch testing are detailed in Secor (1998). The purpose of the sequential batch testing was to <br />evaluate the attenuation capacity of the bedrock materials. The assessment looked at the behavior of <br />arsenic, barium, chromium, lead, selenium and thallium. Secor reported that barium, lead and thallium <br />from CKD leachate would sorb to the native materials and be attenuated along the groundwater flow path <br />and that the particle velocity of these metals would be slower than groundwater velocity. The study was <br />inconclusive for determining the sorption behavior for arsenic, chromium, and selenium. <br />Hydraulic Datz <br />Hydraulic testing was performed on six of the monitoring wells at the Site. Hydraulic rising and falling <br />head slug tests were performed on MW -1, MW -2, MW -3, MW -4 and MW -5 ( Secor 1998, Golder 2010 and <br />Golder <br />i. \10 \81640a\ 0400\ gwcharv+ ellinstallfieldrep _fnl- 30apr14 \10381640a gwcharrpt_holcim- bcettcher_fnl 28apri4 with holcim edits.docx <br />Associates <br />