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i ~ <br />i of 106 mg/1 for April 2, 1991. Site 010 had a flocs of 13.46 gpm • <br />I <br />and an associated TSS value of 390 mg/1, also on April 2, 1991. <br />The last flow recorded at site 008 was June of 1987, and 1991 was <br />the first time site 010 has had any flow. Due to limited data for <br />these sites, no plots of TSS versus time nor f:!ow versus TSS are <br />I <br />presented. <br />5.2 CONDQCTIVITY <br />Conductivity of water for site S1 has been fairly steady in <br />1991 (Figure C-11). The base flow has been gradually declining the <br />last few years, which has caused a natural gradual rise in <br />conductivity, although the three data points frcm 1991 do not vary <br />much from the value recorded late in 1990. <br />The conductivity versus time plot for site NPDES 001 shows an <br />overall increasing tiend in 1991. Conductivities typically are <br />lower during Spring due to increased runoff and rise rapidly after <br />the spring melt (Figure C-12). The flow versus conductivity plot <br />for NPDES site 001 shows a relationship betr~een the flow and <br />conductivity (Figure C-13). No long-term t~~end seems to be <br />occurring in Johnson Gulch runoff water quality. <br />Figure C-14 presents conductivity concentreitions versus time <br />for NPDES site 002. As seen in previous years, there is a decrease <br />in conductivity in Spring due to increased runoff, and then <br />conductivity rises sharply when the flow decreases. Figure C-15 <br />shows a good relationship between flow and conductivity for this <br />site. <br />i <br />5-2 <br />