Laserfiche WebLink
. 1994 Annual Hydrologic Report <br />Page 4 <br />permit requirements and will not be reported in future reports. <br />This testing was added to our CDPS permit requirements because of <br />the classification of the receiving waters. The acute test <br />involves subjecting fathead minnows to various dilutions of <br />effluent in receiving water for 4 days and subjecting Ceriodaphnia <br />dubia to various dilutions for 2 days. The chronic test is a 7 day <br />test for both species. Both tests look primarily at mortality <br />during the test period. Data pages SL-2 and SM-2 are summaries of <br />the final percent survival at the individual effluent dilution <br />ratios. Discharge from outfall 001 and 002 are combined <br />proportional to the total discharge for the previous month to form <br />one sample. The survival rates for all samples taken this Year <br />were in compliance with the permit requirements. <br />GROUND WATER <br />The ground water monitoring points on Cottonwood and Rapid Creeks <br />were monitored twice during the year. Results of the monitoring <br />• are listed on data page GA-2. Diagrams G94-1 thru 6 show a <br />graphical representation of the water level elevation in these <br />wells since monitoring began in 1984. Table G94-1 was prepared to <br />show average water levels in the spring, corresponding to high <br />water level in the adjacent creeks and Table G94.2 was prepared to <br />show the average water level in the fall or near low water levels <br />in the creeks. Measured water level in the spring of this Year <br />were 0.5' or more lower than the average in GWMS-O1's and close to <br />the average for the other 4 piezometers. in the fall the water <br />level in GWMS-02A was higher than average, GWMS-03A was lower than <br />average and the others were close to the average. <br />Piezometers CRDA-O1 thru 06 at the Cameo Refuse Disposal Areas <br />(CRDA) No. 1 and No.2 continued to be monitored quarterly. Data <br />page GC-3 includes measurements for this year. A graphical <br />representation of the water level elevations in CRDA-O1 thru 03 is <br />shown on Diagrams G94-7 thru 10. A discontinuous connecting line <br />indicates periods of time when the water Level was recorded as <br />"dry". As shown on these diagrams, the water levels dropped from <br />the higher water level in 1993. Table G94-3 was prepared to show <br />statistical information on the CRDA piezometers since installed. <br />Readings during the Year were lower than the average for CRDA-O1 <br />thru 04 and higher than average for 05 and 06. <br />Additional piezometers were installed on CRDA 1 during the spring <br />of 1994 as part of a stability analysis of the pile. Data page GC- <br />• 3 contains the total depth of the piezometer, PZ100 thru PZ400 <br />series, as well as the depth at which the water level, critical <br />depth, could compromise the stability of the refuse pile. <br />Monitoring of water levels will be done quarterly on these <br />