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inform the site supervisor. The supervisor or operator will contact MEI at the following <br />number: <br />MESA ENVIRONMENTAL, INC. (970)-858-9115 <br />This telephone number will be clearly posted in the site office of the sand/gravel plant <br />supervisor. A copy of this WMCP will also be retained at the mining site at all times <br />during mining operations. It is the responsibility of MEI as agent of FMM to insure that <br />this information is correct and updated as required. Once informed of the discovery of <br />suspected waste or environmental contamination, MEI will provide qualified personnel to <br />investigate the site, chazacterize the waste, and determine appropriate disposition of the <br />waste, or take other appropriate response actions. <br />The Division will also conduct routine inspections at the facility for the purposes of <br />determining compliance with this WMCP and other applicable environmental <br />regulations. <br />3.2 Fluid Level Monitoring <br />Monitoring of fluid levels in site monitoring wells will be used to evaluate the impact of <br />dewatering on the hydraulic gradient and the potential for groundwater contaminant <br />movement in and azound the gravel mining azea. Prior to the start of dewatering, baseline <br />fluid level measurements will be gauged in all wells in and adjacent to the mining area, as <br />listed in Table 2 and shown on Figure 2. Once dewatering for mining commences, fluid <br />levels will be measured in these same wells on a daily basis for the first two weeks, then <br />weekly for the next 6 weeks, and then monthly (following approval by the Division) as <br />long as dewatering is to continue in the same general azea for an extended period of time. <br />Fluid levels will also be monitored in Trenches 1 and 2 at this same frequency. <br />If pumping conditions change significantly, or if pumping is moved to a different azea <br />(e.g. Subazea 2), then the Division will be notified and the monitoring program adjusted <br />as necessary. Fluid levels will be measured by MEI or other qualified personnel using a <br />device capable of detecting water and product to an accuracy of 0.01 feet (e.g., using an <br />electronic interface probe). Fluid levels will be recorded on the Site Inspection Form <br />(Appendix B). If product is detected in any wells not previously containing product, or if <br />product level/thickness changes significantly in MW-2, MW-4, or WP-3, then pumping <br />will cease until the data can be evaluated (in consultation with the Division) and <br />appropriate mitigation measures implemented. In addition, if an increase or decrease in <br />water level is observed in any of the three sentinel wells (MW-SEP, MW-6, or MW- <br />7EP), then the.head in the trenches will be reduced or increased by up to one foot <br />accordingly until water levels have returned to acceptable levels in the sentinel wells. <br />These trigger criteria and response actions aze further detailed in Table 2. <br />