06-I Water Production Study - Laserfiche WebLink

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consistenUyevolvingregulations. TheTexasNaturalResource ConservarionCommission hu implemented a co-op program which trains oPerators in the EPA comprehensive performance evaluarion (CPE) assessment techniques for water treahnent planrs. The comprehensive performance evaluation is an approach developed by the U.S. Environmental Protection Agency to improve surface water treatrnent plant performance and help assure cost-effective compliance to the surface watertreatment rules (SWTR).(4) The approach consists of two steps, comprehensive performance evaluation (CPE) and comprehensive technical assistance (CTA). A CPE is athorough evaluarion of an existing treatrnent plant including assessment of the unit treahnent processes capabilities and the impact ofthe operatior, maintenance and administrative practices on optimal performance of the plant. CTA is used to oprimize performance of an existing plant by systemarically addressing factors that limit performance idenrified during the CPE. Therefore, the CPE approach can be urilized to evaluate the ability of a water filtration plantto meet the turbidiry and disinfection requirements of the surface water treatment nile and then facilitate achievement of cost effective compliance. In some cases, a CPE may result in costs- savingsand/orincreuecapacity. TheCPEusesa,fourstepapproach:l)evaluatemajorunit processes, 2) conduct performance azsessment, 3) identify limiting factors, and 4) prepare a report offindings. TheTTIRCC through the co-op voluntary urility program conducted a CPE at the Brown County Water Improvement Dishict 9 1's plant in October of 1996.(5) The resulu ofthe inicial CPE are summarized on the following figures. Figure 6 depicts the raw water narbidity to the plant. Fio re 7 depicts the raw waterturbidity in terms ofpercent frequency. Figure 8 depicts the settled water turbidity variations for the 12-month period. Figure 9 depicts the percent fre,quency occurrence for settled water turbidity for the study yeaz. It should be noted that the oprimization goal of a settled water turbidity of2.0 NNs was inieally met only 25 percent of the rime. Figmure 10 depicts the finished waterhubidity and the current regulatory standazd of 0.5 NNs. Figure 11 depicts the finished water turbidityfrequency occurrence forthe 12-month period and indicates and depicts theTexaz pptimization goal for individual filters of 0.1 NTUs. It should be noted that the uutial CPE indicated the plant was achieving t}us goal less than 5 percent of the time. Fisure 6: Raw Water Turbidity , Bcown County W ID Pto. 1 M azimum Daily R_aw W ater Turbidit ~ . ' S _ (l z " " " " ~ " ' ' " 3 . ~ . . . , . M1.......... 7tr _ o.~: