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NOV-20-1996 13 06 GRRND URLLEY CORL CO 303 856 0344 P.01 <br />~: 4 - 20 <br />4.2.7 Surface Water Monitoring Program <br />A water quality monitoring program has been established W monitor the effect of mining <br />activities, Portions of this monitoring program, as well as the ground water monitoring program, <br />described in Section 4.2.4 will cover both the Munger Canyon and McClane Canyon mines which <br />operate in close proximity to one another in the same major watershed. Locations of all surface <br />water monitoring sites are sh~ on Flgureo .2 2. <br />The quantity of flow at 5W 1 and SW-8 will be measured quarterly, contingent upon the <br />availability of water. In response to a request made by the Division to begin monitoring flow at <br />SW8, the location of SW8 has been relocated tiD the bridge at Munger Road effective June <br />1996. Grand Valley has examined the creek channel closer to the south end of the permit area <br />for locations to monitor flow. No good locations were found. AgricuRural activrdes for water <br />diversion make establishmerrt of a sample station impossible wdhout recalibration of the she <br />continually. Flow rating charts for both bridges have been developed to ensure consistence of <br />flow measurements. Flow measurements will also be taken at 5W-2 in McClane Creek below <br />the mine site. The measurements will ideally be taken twice a year if water is available to <br />sample. Measurements will be taken once during spring snow melt and once during a storm <br />everrt. Flow rating charts for both East Salt Creek and for the culvert at SW-2 are presented as <br />~ ~ ` Table 4.2-14. <br />Water quality samples of East 5aR Creek will be collected quarterly. Water quality will be <br />monitored at sites SW1 and SW-8 as shown on Figure 4.2-2. Water quality samples will also <br />be taken at Sites SW2 and SW-5 twice a year; once during spring snow melt and once during a <br />storm event (spring or summer). Table 4.2-13 shows the results of the April, 1981 laboratory <br />analyses from East Salt Creek monitoring locations SW-1 and 5W-4 which are indicated on <br />Figure 4.2.2. All wat4Rgamples will be analyzed for parameters, as noted in Tabk: 4-2-15. The <br />results of all monithring will be submitted to the Regulatory Authority immediately following <br />receipt of analytical results. <br />• During periods of temporary cessation ,the monitoring program will be modified as follows. <br />Water quality samples will tie taken quarterly from sites SW 1 and 5W-8. Water quality samples <br />will be taken twice a year at site SW2; once during spring snow meR and once during a storm <br />event. Samples will be analyzed for those parameters listed on Table 4.2.15. The quantity of <br />flaw will be measured at SW-1, SW2 and SW-8 when samples are collected. <br />r, M` Volume 1 11 - 20 - 96 <br />V <br />- -- ... _ . <br />