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Seep Inventory and Monitoring Program <br /> Page 4 <br /> Minimum Sampling Requirements: <br /> a) For each seep, spring or adit flow one water <br /> characterization set of samples will be taken along with <br /> field parameters. <br /> b) Each field season, every identified site will be <br /> inspected twice, once at the beginning and once toward <br /> the end. Field parameters will be measured at each site <br /> during these inspections. Starting with the 1994 field <br /> season, 20 percent of the sites will be sampled and the <br /> samples anal i z ed for normal sample parameters such that <br /> analysis of all stations will be completed in 5 years. <br /> Laboratory samples will be from a mix of the study area <br /> drainages. <br /> c) The sampling and monitoring requirements shall be -in <br /> effect for a period of time dependent on the leveling off <br /> of the rate of rise of the mine pool. The point of <br /> leveling off will be defined mathematically to the mutual <br /> satisfaction of SGC and DMG, based on data gathered <br /> through monitoring the rise of the mine pool. Monitoring <br /> and sampling shall continue 2 years after the mutually <br /> agreed upon point of leveling off has been reached by the <br /> mine pool. <br /> II. Tracer Monitoring and Bulkhead Inspection <br /> 1. Tracer Monitoring: <br /> The mine pool water will be inoculated with bromide as a <br /> tracer so that emergent mine pool water can be <br /> identified. A monitoring program to detect bromide in <br /> surface waters will include: <br /> a) seep inventory and monitoring samples will include <br /> bromide as an analysis parameter as outlined in <br /> B.I .3. <br /> b) The MLR monitoring point above the American Tunnel <br /> (CC1/CClA) on Cement Creek will be monitored- <br /> monthly for water characterization sample <br /> parameters and field parameters. <br /> c) The South fork of Cement Creek at SF 17 will be <br /> sampled twice annually during low flow conditions <br /> (probably October and February) for field and <br /> normal sample parameters. <br /> d) Placer Gulch at PG 115 and California Gulch at CG <br /> 115 will be sampled annually during low flow <br /> conditions (probably September) for field and <br /> normal sample parameters if the mine pool surface <br /> elevation rises above 11,500 feet. <br /> B -°5 -' <br /> P <br />