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• 1995 Annual Hydrologic Report Page 4 The Whole Effluent Toxicity (WET) tests were continued this Year. The chronic portion of the testing is no longer required. This testing was added to our CDPS permit requirements because of the classification of the receiving waters. The acute test involves subjecting fathead minnows to various dilutions of effluent in receiving water for 4 days and subjecting Ceriodaphnia dubia to various dilutions for 2 days. The tests look primarily at mortality during the test period. Data pages SL-3 and SM-3 are summaries of the final percent survival at the individual effluent dilution ratios. Discharge from outfall 001 and 002 are combined proportional to the total discharge for the previous month to form one sample. The survival rates for all samples taken this Year were in compliance with the permit requirements. Ground Water The ground water monitoring points on Cottonwood and Rapid Creeks were monitored twice during the yeaz. Results of the monitoring are listed on data page GA-2. Diagrams G95-1 thru 6 show a graphical representation of the water level elevation in these wells • since monitoring began in 1984. Table G95-1 was prepared to show average water levels in the spring, corresponding to high water level in the adjacent creeks and in the fall or near low water levels. Measured water level in GWMS-OlA and B were near normal during the spring and fall, in GWMS-02A and B were above normal and GWMS-03A and B were below normal. Piezometers CRDA-O1 thru 06 at the Cameo Refuse Disposal Areas (CRDA) No. 1 and No.2 continued to be monitored quarterly. Data page GC-3 and 4 includes measurements for this year. A graphical representation of the water level elevations in CRDA-O1 is shown on Diagrams G95-7. As shown on this diagram, the water levels dropped slightly again this Year. Table G95-2 was prepazed to show statistical information on the CRDA piezometers since installed. Most of the original CRDA-# piezometers and the new PZ-# piezometers showed only slight variation during the Year. Exceptions to this trend were CRDA-OIA, CRDA-OS, PZlOI, PZ203, PZ303 and PZ305 which showed an increase in water levels over the year of 3 to 9. Piezometers noted as "Prob" in the water level column indicate problems in measuring the water level. The small size of the piezometers make some of the water levels difficult to measure. The resulu of water level measurements at the unit train loadout this Year are listed on Data page GB-1. Diagrams G95-8 thru 11 are graphical representations of water level . elevations in these piezometers. Tables G95-3 were prepared to show statistics on these water levels corresponding to high and low flows in the adjacent river. All of this Year's