Laserfiche WebLink
<br />Renner <br />Page 4 <br />June 25, 1986 <br />6. In future AHRS, the <br />lieu of specific <br />confusion of terms. <br /> <br />term salinity will be not used in <br />conductance in order to avoid <br />Field conductivity values reported in the 1985 and all <br />previous AHRS have not been temperature corrected. PCC <br />will supply temperature correction tables in the next <br />AHR. <br />As evident from Figure 3, there is no trend showing <br />increasing sulfate concentrations at surface water site <br />SW-S2-5 since 1983. However, it is evident from Figure <br />4 that at surface water site SW-S2-6, sulfate <br />concentrations have doubled since 1982 when mining <br />moved into the Fish Creek drainage. As stated in the <br />first paragraph of the 1985 AHR, "Comparison of dat, <br />from past years show that sulfates have increased <br />steadily at NPDES 004, alluvial well GW-S46 and . <br />SW-52-6. This increase will eventually level out to an <br />equilibrium value in the next several years." No <br />statement is made here or elsewhere in the AHR that <br />"sulfate levels will stabilize over the next two <br />years." Data collected at numerous sites which monitor <br />areas which are mined out or continue to be mined, <br />specifically sites NPDES 002*, SW-S2-2* and SW-S2-5 <br />(Figure 3) show that sulfate levels will stabilize in <br />time. Thus, given the historical record at NPDES 002, <br />SW-S2-2 and SW-S2-5, continued monitoring of Site <br />SW-S2-6 is anticipated to show, over the next several <br />years, a leveling out of sulfate concentration. <br />PCC is required to perform annual sediment pond <br />surveys. The annual survey results will be included in <br />all future AHRS. <br />*See data presented in 1980-81, 1982, 1983 and 1984 <br />AHRS. <br />