, ' , 1993, the Plantwas " ' the, , and early ,., 􀁥􀁸􀁰􀁡􀁾􀁤􀀦􀁩􀀠to process 135 MaD capacity age Agencies , , 1970s, the 'CentraJRegional Wastewater with,total secondary and tertiarY
treate The CentralRegiOnaJ '" System expanded its original 28 mile ment and the ability to treat a 2-hour System .. : .. workirigfor yout9prOvide a pipeline to approximately 140 miles
that peak of335 MOO: Also, deChlorination de,art environment.' --extended services to several othercities. facilities were added to meet 'new Plan Of Central Regional Wastewater System
Treatment Plant o Prc\'ious Phase Impmn:mems. [;J l-'base l V Impruvement;; _ Ph.l::C V lmppj\'cmcflr.<; 
􀂷􀂷􀀻􀁐􀁆􀀡􀁾􀁾􀁾􀁾􀁾􀁾􀁉􀁴􀁮􀁾􀀭􀁾􀁴􀁾􀀱􀁦􀁮􀀰􀀱􀀶􀁧􀁹􀁭􀁾􀁫􀁥􀁳􀂷􀁾􀁾􀂷􀂷􀂷􀀭􀁾􀂷􀀮". 􀀮􀀧􀀻􀀺􀀺􀁲􀁲􀁩􀁩􀁲􀁩􀁾􀁸􀁾􀁩􀁶􀁾􀁩􀀩􀁜􀀴􀁴􀁬􀁩􀁯􀁮􀁴􀁙􀁃􀁥􀁮􀁴􀁦􀁡􀁬􀀠Regiorial .....• ''WasleWliterSYsiehi
efficient alld 􀀮􀁟􀁾􀀻􀁩􀀧􀁥􀁩􀁱􀁲􀁩􀁯􀁩􀁩􀀡􀁩􀀼􀀻􀁾􀀨􀁔􀁨􀀬􀀬􀀭􀀧􀁣􀁥􀁩􀁩􀁴􀁲􀁡􀁲􀁓􀁹􀁾􀁴􀁥􀁭􀀡􀁊􀁡􀁳􀁡􀂷􀂷􀀠'. . 􀁓􀁥􀁲􀁶􀁩􀀻􀀻􀀢􀁡􀁲􀁾􀁡􀀼􀀶􀁦􀀠􀀶􀁾􀁥􀁲􀀠450 square miles . 􀁾􀁩􀁴􀁴􀁰􀁩􀀢􀁯􀁬􀁉􀁥
􀁣􀁴􀁩􀁯􀁮􀀠system eX!eriding mor". 􀀧􀁴􀁨􀁡􀁨􀀲􀁯􀁰􀁲􀁲􀁩􀁩􀁩􀁥􀁾􀀬􀀠1'hesyste"in uses current . 􀁳􀁩􀁩􀁬􀁴􀁾􀁾􀁯􀁦􀀧􀁩􀀺􀁨􀁥􀀭􀁡􀁴􀁴􀀠ieChnologyin 􀁯􀁯􀁬􀁬􀁾􀁣􀁴􀁩􀁯􀁮􀀠.' . • system
'teleme'lering, 'computefsystems, . 􀀢􀀺􀀻􀀻􀀭􀁰􀀧􀀻􀁩􀁡􀁬􀀺􀁜􀁻􀀩􀁮􀁡􀁩􀁾􀁾􀁮􀁴􀁲􀁾􀁬􀁡􀁮􀀴􀀠􀁩􀁮􀁲􀁵􀁩􀁪􀁴􀁥􀁲􀁾􀁮􀁣􀁥􀀬􀀠•. "/: 􀁊􀀬􀀺􀀺􀀺􀁾􀁾􀀬􀁾􀁾􀀬􀁾􀁾􀁾􀁰􀁩􀀢􀀮􀀺􀂷􀀧􀀭􀀮􀀧􀀾􀁾􀂷􀀧􀀮􀀭􀁟􀀬􀀾􀀺
􀂷􀀺􀀠􀀭􀀬􀀻􀁾􀀮􀀺􀀠' 􀁾􀀠-'. :";', :..'. .,'.A;process c0!llputer system recelVes .' ..·:alI cplleetion:SystemIi)ete( 􀁾􀁴􀁡􀁴􀁩􀁣􀁩􀁮􀁳􀀠and.. . . 􀀢􀀺􀁉􀁩􀁦􀁴􀁾􀁩􀁡􀁴􀁩􀁯􀁮􀁳􀀠􀁦􀁬􀁯􀁷􀁳􀁾􀀠and
also controls and' ',' .' .. mqriit6rs vari,!us functidnS of the plant ,:pr'ocess. Additionally, ihe process' .., ,', .oomputer syste'in'retrieves vital process .,. .. information within
seconds after it occurs. This is accomplished by strategi􀀭􀀻􀁂􀁩􀁾􀁾􀁏􀁾􀀧􀁩􀁴􀁯􀁾􀁾􀁾􀁔􀁯􀀭􀀼􀁰􀁡􀁳􀁳􀀠􀁾􀁾􀁾􀁾􀁉􀁡􀀢􀁾􀁲􀁹􀀠􀁾􀁾􀁾􀁩􀁲􀁥􀁭􀁾􀁾􀁬􀁾􀁳􀀬􀀭,,' 􀁤􀁾􀁩􀁧􀁦􀀱􀁡􀁴􀁥􀁤􀀠􀁱􀁲􀁾􀁮􀁩􀁳􀀡􀁮􀁾
􀀾􀀮􀀧􀀺􀀠. . Ceriodaphnia dubia and 'Daphnia pulex. must surVive 􀁡􀁮􀁾􀀠reproduce'in Central effluent .. cally placed input and output points that the computer controls and monitors
and covering, collecting and scrubbing' throughout the plant. The inventory odorous compounds that are collected . control, purchasing, pretreatment, throughout the plant and distributed
inio laboratory and maintenance managethe activated sludge process to biologiment functions operate on computer cally reduce odors to acceptable levels. systems with customized software
Secondary activated sludge can also be programs providing information used in returned to the front of the primary the decision-making process. process to reduce high loadings of Odor
Control sulfide in the influent wastewater during Odor control processes, constructed odorous periods. The on-site monofill during capital improvement projects, and biosolids staging
facilities have include chemical addition using iron extensive neutralization dispersing salts for treatment of sulfides in soluequipment, which is utilized to control tion; modifications
to the primary odors at these areas, A sludge managesections of the process to reduce the ment pump station collects all residual hydraulic free fall of wastewater that sludge from the
biosolids staging area generates large amounts of hydrogen and returns the 'side' stream to the fro!!t Toxicity Red uction Both state and 􀁦􀁾􀁥􀀻􀁡􀁬􀀠permitting agencies 􀁲􀁥􀁱􀁵􀁩􀁩􀁥􀀧􀁾􀁨􀁯􀁬􀁥�
�effiuent toxicity testing 'of the wastewater discharged to the Trinity River. The reduction of toxicity to extremely low levels is required to protect the aquatic organisms in the receiving
stream and test species. Controlling toxicity begins at its sourre arid an aggressive Pretreatment Program implemented by the Central Project for industrial discharges has been instrumental
in minimizing toxic compounds in the influent wastewater. Also, optimizing process operations throughout the 􀁴􀁲􀁥􀁡􀁴􀁭􀁾􀁮􀁴􀀠train produces a secondary treated wastewater that sulfide
gas released to the iI',􀀮􀁲􀁲􀁩􀀰􀀬􀁳􀁰􀁲􀀬􀀼􀀺􀁾􀁾􀀮􀀠of the plant. 􀁦􀁏􀁬􀁮􀁾􀁩􀁬􀀬􀁴􀀢􀁲􀀧􀁾􀁹􀀠􀁦􀁾􀁉􀁊􀁳I)el,)",' 􀁾􀁣􀁩􀁩􀁲􀁥􀀠and Laboratory (Testing and Analysisl-Careful Odor
Control----Odor management has been Telemetry/SCADA System---A remote FM analytical monitoring of lhe treatment an ongoing process with numerous facilities telemetry flow monitoring
system is used to processes and jndUSlries discharging to the constructed to address rhe concern of both 􀁯􀁮􀁾􀀠acquire 􀁵􀁰􀁾􀁴􀁯􀁾􀁤􀁡􀁬􀁥􀀠flow informarion from system by the laboratory
assures a high quality site and off-SIte odors. metering stations for billing purposes as well discharge discharge from the treatment plant as monitoring operational status. 
-: ,,";_ 􀀧􀁾􀁾􀁾􀁾􀁾􀀭􀀺􀁲􀁾􀁳􀀻􀁾􀀭􀁾􀀭􀀧􀀺􀀺􀀭􀀻􀁟􀀠_ _>',' 􀀢􀀢􀀧􀁾􀀻􀁬􀁾􀁾􀁾􀁗􀁾􀀡􀀿􀁜􀁙􀁏􀁲􀁫\Vith '11,􀁾􀁣􀁬􀁬􀁮􀀨􀁪􀁬􀁬􀁯􀁧􀀩􀁦􀀬􀁰􀁥􀁯􀀩􀁊􀁦􀁬􀁾􀁊􀁾􀁮􀁬􀁬􀀧􀀮􀁊􀀺􀀡􀀬􀁲􀁪􀀩􀁧􀁲􀁾􀁈􀁬􀀱􀀺􀁓􀀻
􀀼'􀁾􀀧􀁊􀀮􀀬􀀠􀀧􀁾􀀧􀀮􀀬􀀠􀀬􀁣􀀺􀀺􀀢􀀧􀀻􀁾􀀬􀀢􀀧􀀺􀀺􀀻􀁟􀀢􀁜􀀧􀀭􀀺􀀺􀁟􀁾􀀠t::_:";··.. -" lj< •••􀀧􀀮􀁱􀁬􀁩􀀻􀀺􀁾􀀻􀀬􀀻􀁣􀁴􀁩􀁩􀁲􀁩􀁃􀁩􀀡􀀺􀁹􀀠ievels fQrthe specified 􀁾􀁾􀀺􀀬􀁾􀁾􀁾􀁴􀁾􀁴􀁾􀁙􀁾􀁾􀀡􀁾
􀁩􀁾􀀺􀀩􀀬􀀨􀁻􀁩􀀢􀁾􀁳􀁵􀁲􀁥􀀭􀀧􀁜􀁶􀁡􀁳􀁬􀁥􀁴􀁶􀁩􀁩􀁴􀁥􀁦􀀢􀀭􀀧􀁾􀀠"',"" ,;,;toxicity is' 􀁬􀁩􀁬􀀺􀁾􀁮􀁡􀀢􀀢􀀬􀁥􀁰􀁴􀁡􀁢􀁬􀁥􀀠low level, the ", <;leeoridar::yW:l,IStewater ispuniped
􀀧􀁩􀀩􀀬􀀻􀁾􀀬􀁴􀁊􀀺􀁾􀀬􀁾􀁾􀁨􀁜􀁾􀁾􀁕􀁾􀂣􀁉􀀨􀀩􀀬􀀻􀀬􀁣􀁡􀁩􀁢􀁰􀁮􀀬􀁡􀁤􀁳􀁯􀁲􀁰􀁴􀁩􀁯􀁩􀁩􀀢􀀠' ,i,' 'ihic'iifbofl beds have been in 􀀻􀀢􀀢􀀢􀁯􀁲􀁥􀁩􀁡􀁩􀁦􀁯􀁾􀀧􀁳􀁩􀁴􀁜􀁃􀀻􀁥􀀱􀀹􀀸􀀹􀀧􀁡􀁮􀁤􀀠are
among the, ",largesi,:stlC:cessflll operating units in the 􀀧􀀬􀁩􀀡􀁴􀁉􀁊􀁮􀁩􀁴􀁥􀁤􀁓􀁴􀁾􀁴􀁥􀁳􀀬􀁔􀁨􀁥􀀠􀁣􀁾􀁲􀁢􀁯􀁮􀀠adsorption " /:'" ,"baSins have:dearly demonstrated 􀀧􀁾􀀿􀁩􀁾􀁬􀀻􀀬􀁴􀁉􀁩􀁲􀀨􀀩
􀁬􀁬􀁧􀀡􀁩􀁩􀁬􀁬􀁩􀁲􀁴􀁨􀁥􀁩􀁲􀀠operation.al historythe 'ability to rectllcetoxicity. to an accept-' , 􀁾􀁢􀁬􀁾􀁬􀁥􀁶􀁥􀁴􀁾􀁮􀁤􀁭􀁥􀁥􀁩􀁴􀁨􀁥􀁳􀁴􀁲􀁩􀁮􀁧􀁥􀀻􀀧􀁴􀀠permit " ,􀀧􀀬􀀻􀀺􀁾􀀺􀁾􀁾􀁾􀁦􀀧􀀻􀀿
􀀬􀀢􀀬􀀠" , ' Tech!io.l?is1:is'O\1IY 􀁡􀁾􀁧􀁯􀁯􀁤􀀠as the " ,.peOplewho"arcreSponsible for operat,'., ing and nraintaining the equipment. ">:::Central is staffed with professional, 'dedicated
'personnel that take pride in their work. The plant staff has an average length ofservice over six years, and includes awide range of diversity in the varied 􀁾􀁫􀀻􀁬􀁉􀁳􀀠required at
the Central Facility, The Central Regional Wastewater System is organized into three departments and their functions are as follows: I,) System Operatioll and Mainlenonce -The Operation
and Maintenance Department is responsible for the complete operation and maintenance of liquids and solids treatment process and equipment, lift stations, electrical and electronics,
grounds and vehicles, . ,"''''; Co,st"itd, 􀁅􀁉􀀧􀁉􀁫􀁩􀀮􀁮􀁣􀁙􀁃􀁾􀀬􀁮􀁴􀁊􀀧􀁯􀁬􀀭􀀭􀀮􀁁􀀠􀁲􀁥􀁮􀁾􀁢􀁩􀁬􀁩􀁴􀁹􀀭􀁢􀁡􀁳􂂬􀁸􀁩􀁩􀀠􀁾􀁩􀁮􀁴􀁥􀁮􀁡􀁮􀁾􀀠program 􀀢􀁩􀁾􀁳􀁵􀁾􀁾􀀠r:-ajor-􀁥􀁱􀁵􀁩􀁰􀁭􀁾􀁮􀁴
􀀠􀁩􀁾􀀠􀁣􀁡􀁰􀁾􀁾􀁬􀁥􀀢􀁯􀁦􀀠􀁾􀁸􀁴􀁭􀁵􀁭perfomlanee when operated. 2.) Administrative Services -The , Administrative SerVices Department is responsible for accounting, administrativesupport,
vendor coordination, human resourceS, infonnation systems, inventory control, purchasing and training. 3,) Technical Services The Technical Services Department is responsible for all
process laboratory analysis and the interceptor pipeline system, engineering, metering, monitoring and industrial pretreatment coordination, In addition, the laboratory and pretreatment
areas perform outside contrdct services for other TRA projects and contracting parties, In summary, it requires the,coordinated individual effort of dedicated employees having a wide
range ofskills to operate the system, These employees take great pride in providing a vital service to the communities that are members of the system. Programs To achieve and maintain
cost effective operations, the Central System uses a program approach to achIeving both long and short-term goals, Project wide employee participation in these programs insures success
and an opportunity for personnel to develop Gas 􀁕􀁴􀁩􀁬􀁩􀁺􀁡􀁴􀁩􀁾􀁮􀀭􀁍􀁥􀁴􀁨􀁡􀁮􀁥􀀠gas produced in the Water Reuse--the Las Colinas development Pretreatment-The pretreatment division
sludge digestion process is connect.ed to energy in Irving uses effluent for maintaining Jake provides field sample testing, industrial savIng eqUipment that reduces annual operation
levels and irrigation, This is the largest urban permitting. inspections, and technical support and maintenance costs. water reuse program in Texas. 10 the Central Plant, customer cities,
state and federal agencies, and other TRA projects. 
, " ;-. '...􀀺􀁾􀀠-'. 􀀧􀀨􀀬􀀺􀁥􀁾􀁴􀁲􀁡􀁬􀀧􀁳􀁾􀁴􀁨􀁩􀁩􀁲􀁴􀁜􀁹􀁢􀁳􀁬􀁾􀁤􀁧􀁾􀀠􀁯􀁰􀁴􀀻􀁯􀁾􀁳􀀠,c.onsist.of an 8,0:acre .on:site 􀁾􀀮􀁯􀁮􀁯􀁦􀁩􀁬􀁩􀀠' ._,_""<.".,0 ,·.F'. _ 􀁾􀀮􀀭..
;, ,0.. ' ..;,,;-,";': ",:, ',' ..... _, . .... . _ ':':'and providirig'blOS.olids t.o several.ofits' ..:􀁣􀀭􀁾􀁳􀁴􀁯􀁾􀁾􀁩􀀮􀀢􀀢􀁣􀁩􀁴􀁩􀁥􀁳􀀮􀁩􀁬􀀭􀁳􀀺􀂷􀀧􀁾􀁲􀁩􀂷􀀠􀁡􀁲􀁴􀁌􀁲􀁩􀁃􀁩􀁾􀀱􀀠'soll
􀁾􀁦􀁯􀁲􀀠", '. 􀀢􀀧􀁴􀀻􀀻􀀺􀁾􀀺􀁾􀀻􀀡􀁴􀀲􀁾􀁾􀁬􀁬􀁥􀁣􀁴􀁳􀀧􀁦􀁵􀁥􀁐􀁬􀁡􀁲􀁩􀁮􀀻􀁮􀁧􀀬􀀠, -. 􀀻􀀭􀁾􀀻􀁊􀁦􀁥􀁴􀁹􀀭􀁁􀁮􀀠􀁡􀁧􀁧􀁲􀁾􀁳􀁳􀁩􀁶􀁥􀀠safety 􀁰􀁲􀁯􀁧􀁲􀁡􀁾􀀮􀁨􀁡􀁾'been develope{{that
􀁵􀁴􀁩􀁬􀁩􀁺􀁾􀁳􀀠􀁥􀁾􀁰􀁬􀁯􀀻􀁲􀁥􀁥􀀧􀀠,: participation in establishing a safe work' environment for,all 􀁥􀁭􀁰􀀧􀁬􀁯􀁹􀁥􀁾􀀮􀀠and use skills. Typically, these programs transcend departmental
boundaries ,and benefit the system as a whole in areas , 􀁳􀁵􀁾􀁨􀀠as safety, cost reduction, emergency planning, plant appearance, etc. The preventive 􀁭􀁡􀁩􀁮􀁴􀁥􀁮􀁡􀁮􀁣􀁾􀀠program
c.onsists of planned maintenance activities that are scheduled by a computerized maintenance management system. This system directly interfaces with the maintenance work order system
and tracks activities and associated cost. Predictive maintenance utilizes vibration-based machinery mcinitoring,infrared therm.ography and ".oil and lubricati.on analysis. Proactive
InfiltrationlInflow-An inflow and infiltration evaluation, hydraulic modeling program and field inspections have been completed for the purpose of developing an 􀁩􀁮􀁾􀁥􀁲􀁣􀁥􀁰􀁴􀁯􀁲􀀠management
plan [hat comprehensively addresses collection system needs. maintenance is a management tool applied t.oward advanced investigative and corre<;tive technolqgy in solving the ro.ot cause
.of equipment failure. The g.oal .of this program is t.o reduce equipment failures, extend its life and lower overall maintenance cost. Various programs at Central to improve .overall
efficiency are recycling of freon, antifreeze, oil, 􀁰􀁾􀁥􀁲􀀬􀀠cans, glass and beneficial reuse .of bi.osolids. Dewatered sludges are processed at the bi.os.olids staging area t.o produce
a beneficial product that is applied at predetermined agron.omic rates for the agriculture site. Dewatered sludge from' Biosolids-The biosolids staging facility has a capacity of 250
plus dry tons per day. Biosolids can be prepared at this location as either a class "A" or liB" material depending on its ultimate applicatiou. desigri, c.ontrUc6.onand .operational'
' ' , ',strategies 􀁷􀁩􀁴􀁨􀁩􀁨􀁾􀁡􀁤􀁶􀁩􀁃􀁥􀀠and input .of the , Central SystemAdvisoryCcimmittee. , , 'This c.ommitte is c.oihposed of .one v.oting member fr.om 􀁥􀁡􀁾􀁨􀀠.of fue
System's 21 c.ontracting parties. All decisions which affect service, .operati.oqs, capital c.osts and the annual .operating budgets are presented and dicussed with this c.ommittee before
final acti.on'is taken by the TRA B.oard of Directors:-This teamwork approach to problem solving produces a synergism in the 􀁤􀁥􀁣􀁩􀁳􀁩􀁯􀁮􀁾􀁭􀁡􀁫􀁩􀁮􀁧􀀠process .of this Project.
An contracting parties pay the same cost for wh.olesale wastewarer treatment, which is currently in fue range .of $1.10 per 1,000 gallons. Payments t.o TRA are based up.on estimated
costs and predicted allocati.ons among the 21 parties. At the end .of each fiscal year, an audited settle, , up procedure returns all unspent funds t.o , the 21 parties. '_".,',' EinergencYRespone
--_.-􀀭􀁾􀀠TheCeniral Plant has a c.omprehensive Emerge'ncy'Response Plan t.o ' : protect 􀁾􀁭􀁰􀁬􀀮􀁯􀁹􀁥􀀧􀀻􀁾􀁩􀁬􀁮􀁤􀀠ihe general pUblic. There are j'.ou'r' resp.onse teams made
up .of eighiinembers wh.o are trained t.o c.ontain chemical leaks at the Central Facility. These response teams use state-of-the-art emergency equipment when called int.o acti.on. A
safety trailer for resp.onding t.o .on-site emergencies is available t.o the emergency responders. The resp.onse team is als.o fully trained in all rescue techniques and c.onfined space
procedures. 
􀀭􀀧􀁾􀀠--. . 􀀢􀁾􀁾􀀻􀁾􀁾􀁾􀁮􀁴􀁴􀁾􀀱􀀠System is not only 􀁡􀁾􀁁􀁦􀁵􀁬􀁬􀁹􀁾􀁴􀁾􀁧􀁲􀁾􀁴􀁥􀁤􀁥􀁮􀁙􀁩􀁲􀁢􀁮􀁭􀁥􀁮􀁴􀁡􀁬􀀮􀀠'. 􀀮􀁦􀁾􀀻􀂷􀁾􀀻􀀧􀀻􀁢􀁯􀁮􀁾􀁤􀁳􀁯􀁲􀁰􀀶􀀰􀁮􀁾􀁲􀁾􀁣􀁾􀁳􀁳􀁥􀁳􀀠in
active •.c ..veryt¥ge .c6ilecti{;uaITd waret'recialna' 􀀧􀀭􀁬􀁡􀁢􀁯􀁾􀁡􀁴􀀵􀁲􀁹􀁾􀁾􀁢􀁖􀁩􀁤􀀨􀀬􀀧􀁳􀀼􀁴􀁑􀁦􀁮􀁾􀁉􀁗􀁴􀁩􀁪􀁦􀁩􀁾􀁌􀁙􀁬􀁩􀁃􀁴􀁩􀁩􀁣􀀭􀀭􀀢􀀢􀀧􀁩􀁪􀁩􀁻􀁴􀁨􀀧􀁡􀁲􀁣􀁯􀁩􀁲􀁳􀁩􀀧􀁳􀁴􀁩􀀻􀁬􀀱
􀁩􀁬􀁙􀀭􀁰􀁴􀁢􀀼􀁬􀁕􀁣􀁾􀁳a􀁩􀁩􀁯􀁾􀁮􀀧􀀠.. .' iirinuriit 􀁣􀁾􀁰􀁡􀁢􀁬􀁥􀀠of producing a very. 􀁣􀁾􀁰􀁾􀁢􀁩􀁬􀁩􀀶􀁥􀁳􀁦􀀡􀁬􀁲􀁰􀀮􀁪􀀧􀀢􀁬􀁴􀁐􀀻􀀶􀁣􀀻􀁾􀁳􀁬􀁮􀁯􀁮􀁩􀁴􀁯􀁲􀁩􀀡􀀬􀁧􀀠..,toXic
high quality effluent water.' . 'higli:quiilityefnuerit; but.it is also afull andcontrqIfor 􀁩􀁩􀁱􀁩􀁪􀁩􀁤􀁾􀁾􀁤saiids ' .. ' .··i;The capability foriri;liouse collee.. ' .􀁳􀁥􀁲􀁶􀁩􀁾􀁥􀁦􀁾􀁃􀁩􀀡􀁩�
�􀁙􀀠that possesses 􀁩􀁾􀀧􀁨􀁱􀁴􀁩􀁳􀁥􀀠'. 􀀮􀁯􀁰􀁥􀁲􀁡􀁬􀁩􀀼􀁩􀁾􀁬􀀠􀀡􀁬􀁊􀀢􀁩􀀺􀁩􀁨􀁲􀁩􀁤􀁴􀁊􀁩􀁥􀁾􀁣􀀡􀁒􀁃􀁫􀀯􀀮􀀺􀀠.•..........••• ,. ..• 􀂷􀁜􀁩􀀼􀀿􀁮􀁳􀁹􀁳􀁴􀁾􀀨􀁬􀁬􀁬􀁬􀁬􀁑􀁬􀀡􀁩􀁴􀁾􀁲􀁩􀁮􀁧􀁾�
�􀁬􀀴􀀠􀁲􀁾􀁰􀁡􀁲􀁲.....•...... '... 􀁣􀁾􀁰􀁡􀁢􀁢􀁩􀁩􀁩􀁴􀁙􀀠􀁴􀁯􀁾􀁣􀁣􀁯􀁮􀁩􀁩􀁮􀀻􀀻􀁤􀁡􀁴􀁥􀀠virtually all •. ·-Afull serviCeiniiiIsfualpretfeatmerit . cThelargest urbari 􀁥􀁦􀁦􀁬􀁾􀁥􀁮􀁴􀀠􀁲􀁥􀁣􀁬
􀁡􀁩􀁮􀁡􀁾􀀠of its' openitions', 􀁭􀁡􀁩􀁮􀁴􀁾􀁮􀁡􀁮􀁣􀁥􀀬􀀠adniinis-, division: whbse; servicbdiiCIlirle' 􀁩􀁮􀁤􀁵􀂷􀁳􀁾􀂷􀀮􀀠:-tlon and' reuse_ program -in Texas.' . . '. 􀁴􀁲􀁡􀁴􀁩􀁯􀁲􀁩􀀻􀀧􀁾􀁤􀁩�
�􀀲􀁨􀁮􀁩􀁤􀁡􀁬􀀠􀁳􀁥􀀻􀀧􀀻􀀧􀁩􀁣􀁥􀁮􀁾􀁤􀁳􀁩􀀢􀀠. trial 􀁰􀀢􀁥􀁲􀁉􀁉􀁬􀁩􀁴􀁴􀁩􀀻􀀻􀁧􀀬􀁩􀀶􀁳􀁰􀁾􀁩􀁉􀁲􀁩􀁧􀁡􀂷􀀬􀀺􀀬􀁤􀀬􀁳􀁡􀁲􀁲􀁩􀁾􀁩􀀠...•..􀂷􀀮􀁾􀁓􀁊􀁭􀁬􀁧􀁥􀁤􀁥􀁷􀁡􀁴􀁥􀁲􀁩􀁲􀁩􀁧􀀠􀁾􀁳􀁩􀁰􀁧􀁦􀁩
􀁬􀁴􀁾􀁲􀀠aod corr;piete 􀁴􀁲􀁥􀁡􀁴􀁭􀁾􀁮􀁴􀀠cim be 􀁰􀁛􀁯􀁾􀁩􀁤􀁥􀁤􀀠piing; whkh w!len coupled .with the ........ ·.beltpressesproduces a dry product . ,'to monthly average floWs of
I35MGD .•.... arialyiical tapaliilitieStlfthelaboratorY' 'V$hlch allows for the full may of • 􀁡􀁮􀁤􀁤􀁾􀁬􀁹􀀨􀁬􀁬􀁡􀁸􀁩􀁭􀁵􀁭􀀠flows o035M(;D. .provide lheCenl1'a]SYStemand.its . '.
disposal options. 􀁄􀁵􀁮􀁲􀁩􀁧􀁩􀁬􀁩􀁤􀁴􀁲􀀻􀀻􀁡􀁩􀁲􀁩􀁬􀁥􀁾􀁴􀀠process,biolo'gicai 􀀧􀁾􀀧􀁣􀁩􀁩􀁳􀁴􀁯􀁭􀁥􀁲􀁤􀁴􀁩􀁾􀁳􀀪􀁩􀁴􀁜􀁩􀀻􀁦􀁦􀁩􀁾􀁾􀁢􀁩􀁩􀁩􀁴􀁹􀀠to .' .' 􀀧􀁾􀁁􀁬􀁬􀀠iimoVativeodor
control program c ..' . '. 􀁯􀁸􀁹􀁧􀁾􀁾􀀮􀁤􀁥􀁲􀁲􀁩􀁡􀁮􀁤􀀬􀀠􀁳􀁾􀁳􀁰􀁥􀁨􀁤􀁾􀁤􀀠solids .and . '... 􀁣􀁯􀁭􀁰􀁬􀁙􀁾􀁩􀁴􀁨􀁡􀁬􀁬􀁳􀁴􀁡􀁾􀀮􀁭􀁩􀁩􀀠federal 􀁾􀀮􀀠'. involving the collection;
transportation 􀁡􀁭􀁭􀀶􀁮􀁩􀁡􀁩􀁬􀁩􀁴􀁲􀁯􀁧􀁥􀁮􀁡􀁲􀁥􀁲􀁾􀁤􀁵􀁣􀁥􀁤􀀠by 99 • pretreatment'law, ":", 't,:;·. . . . arid introduction of odorous gases into . . 􀁰􀁥􀁲􀁤􀁾􀁾􀁩􀀮􀁔􀁨􀁾􀁃􀁾􀁮􀁴􀁲􀀧􀁡􀁬􀁐�
�􀁡􀁾􀁩􀀠has the .•.. . .• . .·'it􀁩􀁾􀀠􀁯􀁬􀁬􀁥􀀶􀀧􀁦􀁦􀁵􀁩􀁦􀁥􀂥􀁴􀁲􀁾􀁡􀁩􀁭􀁥􀀬􀁮􀁴􀀠facili: 􀁴􀁨􀁾􀀠activated sludge 􀁰􀁲􀁑􀁾􀁥􀁳􀁳􀀠as a primary . 􀁲􀁲􀁩􀁥􀁣􀁨􀁡􀁮􀁩􀁣􀁾􀁩􀁤􀁥􀁩􀁩􀀢􀁡􀁴􀁥􀁲􀀬􀁾�
�􀀠capability of ties with 􀁯􀁷􀂷􀁾􀁩􀁴􀁥􀀺􀁢􀁩􀁯􀁱􀁩􀁯􀁮􀁩􀁴􀁱􀁲􀁩􀁮􀁧􀁦􀁡􀁣􀁩􀁬􀁩􀁴􀁩􀁥􀁩􀀻􀀠..·.method of odor reduction.··· 􀁰􀁲􀁯􀁣􀁤􀁳􀁳􀁩􀁾􀁧􀀲􀀰􀁩􀁬􀀠dry tons of sludge daily.···
'whichprdvide,,'hro# ra;;geoftokicity . Uniquefeatures you will find witilln . . testing 􀁣􀁡􀁰􀁩􀁩􀁢􀁩􀁬􀁩􀁴􀁩􀁥􀁳􀀺􀀻􀁾􀀮􀀠...•.•. ...... '. the 􀁃􀁥􀁮􀁴􀁩􀁾􀁉􀀡􀀺􀀻􀁹􀁳􀁴􀁥􀁭􀀠include:
"cIt􀁦􀁾􀁡􀁴􀀧􀀻􀁲􀁤􀁭􀁩􀁥􀀠of theiargest success-. How Central Works MonafiH Raw Primary Sludge Thickened Raw Grayity Thickeners Filter & nelt Press ,-_,-",-:-_P",n,,·mary Slu"d::!g"e'-:-___-,
Blend Flotation Tanks Thickeners . 􀁂􀁬􀁥􀁮􀁾􀁾􀀮􀀠_': .TIlickened Waste 􀀬􀁟􀁂􀁾􀁯􀁳􀁯􀁾􀀡􀁾􀁾􀀠: .. '·calie· . .. , . "shidges 􀁂􀁥􀁮􀁾􀁦􀁩􀁾􀁩􀁾􀁉􀀺􀁒􀁾􀁾􀀧􀂷􀀬􀀧􀀠. .-:--:;.... -,
Dechlorimttioll Disinfection Basins Gravity Sand Filters Final Clarifiers Discharge To The Dallas Connty Utility and Reclamation District Discharge To Trinity River And Reuse 
i 1'" ,,' " Primary/Secondary TreatInent','". 􀁾􀀭-. ',.".'e,', separitioiiofsollas:􀀢􀁾􀀠Solids that Settle or fI()at are sepa· , ,'rated and'rernoved from the wastewater 􀀧􀁳􀁴􀁲􀁥􀁡􀁭􀀬􀁓􀁾􀁜􀁩􀁤�
�􀀬􀁲􀁥􀁭􀁡􀁩􀁮􀁩􀁮􀁧􀀠iri the 􀁾􀁡􀁳􀁴􀁥􀀬􀀧􀀠􀁷􀁡􀁴􀁥􀁲􀁡􀁲􀁾􀀠either sJlspended or dissoived 'solids.' " ' , , 􀁐􀁦􀁩􀁭􀁬􀁬􀁴􀁙􀁮􀀧􀁥􀁡􀁴􀁮􀀮􀁾􀁮􀁴􀀭􀁔􀁨􀁾􀀬􀁰􀁾􀁭􀁡􀁲􀁙􀀻􀀠" ' 􀁰􀁲􀁯􀁣􀁾􀁳􀁳􀀧􀁣�
�􀁮􀁳􀁩􀁳􀁴􀁳􀀠of three 􀁳􀁴􀁥􀁰􀁳􀀬􀁆􀁩􀁩􀁾􀁴􀀡􀀠foreign objects are screened out of.the • ,wastewater to prevent diJ;'uige to' " ' ", downstream equipmerit,Second"the ,'. " ,'" 􀁳􀁣􀁲􀁥􀁥􀁮􀁥􀁤􀁾􀁾
􀁳􀁬􀁥􀁷􀁡􀁴􀁥􀁲􀀠is pumped to the aerated grit liasios or pista gritsysrems bottom of the basins. a'net\jlork ,of air 􀀧􀀧􀀧􀁣􀁩􀁛􀁳􀁉􀁩􀀱􀀶􀁵􀁴􀁩􀀶􀁾􀁰􀁛􀁰􀁾􀁡􀀻􀀧􀁤􀀠rine'6iJbbie
diffusers release minui¢.'air bubbles to , 􀀬􀁰􀁲􀁯􀁾􀁩􀁤􀁥􀀠􀁮􀁩􀁬􀁩􀁤􀁮􀁧􀁍􀁤􀀹􀁩􀁜􀁹􀁧􀁾􀁩􀁬􀁦􀀨􀀩􀀮􀁲􀀠billions ,of.mjcroorganiSmSwlthlnttiii process, ',,'The microorganisrrts;consume
most of .. , tlie orgahic contariiiiiai"!S ll'lthe waste: ' water ' ',;' , <'J" ":' " , , 􀀧􀁆􀁩􀁾􀁾􀀠clarifiers a1l6wthe microorgan, isms to separate from itie water ,md ,'settle on'the
basin floor to 􀁦􀁯􀁾􀀠a sludge 􀀧􀀬􀀧􀁢􀁩􀁾􀁫􀁥􀁴􀀻􀁵􀁬􀁴􀁩􀁭􀀻􀀧􀀻􀁥􀁩􀀱􀁰􀁲􀁤􀁤􀁵􀀶􀀻􀁾􀁧􀁤􀁥􀁡􀁮􀀠' . 􀀧􀁾􀁦􀁦􀁬􀁴􀁩􀁥􀁮􀁴􀀠water: the 􀁾􀁬􀁵􀁤􀁧􀁥􀀠blanket is " removed from the\'i,;'siii
floor by , floating bridges ttiafreiuf(I ihe sludge to the front of the 􀁡􀁥􀁲􀁡􀁾􀀼􀀡􀁾􀁒􀁡􀁳􀁩􀁮􀀬􀀠which " sustains the activated sii:.ilgeprocess, The 􀁭􀁩􀁣􀁲􀁯􀁯􀁲􀁧􀁡􀁮􀁩􀁳􀁭􀁰􀁢􀁰􀁾􀁬􀁩􀁬􀁴􀁩
􀀶􀁮􀀠is ,where small particles. such as sand. ' , Seeondary Treatment-Primary controlled bY,'remov'ing a small percent, ' gravel :and other abrasive materials, are , treated wastewater
is eyenly distributed age to solids thickening. ' removed and disposed, Third, wastewainto the aeration basins which utilize the ter flows to the primary clarifiers, activated sludge
process, At the Advanced Treatment FILTRATION-Effluent water from the final clarifiers flows into continuous 'backwash gravity sand filters where oV',vo _.vf.urilier removed, ' dioxide
is added to remove residual chlorine to less than 0.1 mgll. CARBON..,-A majority of the effluent CHLORINATION-Effluent from the waler filters through the carbon carbon basins flows to
the chlorine adsorption basin for reduction in contact basins, where the, water is ,,I0xicity:'l1lis provides a final polishing, chloril1ated for ,:" ..,:c."", SYSTEMS CONTROL-The control
center is staffed 24 hours a day by operations personnel who monitor and control operational processes, the chlorine contact basins flows to the dechlorination channel where sulfur 􀀧􀁯􀁦􀁩􀁨􀁥􀁥􀁦􀁦
􀁬􀁵􀁥􀀬􀁾􀀡􀀬􀀠" '" 
􀁾􀁾􀀠";.: w""te . acil"ll,ted commbnly called ·st;kOpdary sludge. Primary aJ)d second." . ,., '".aiy 􀁳􀁬􀁾􀁤􀁧􀁥􀀠are thickened in gravity 'tlllckeners, dissolved airfiCitation ,thickeners
orgravity belt thickeners. This reduces the volume of sludge to be ,himdled in the dewatering process. riIml"'diulo<.jer, jJressUre irrtoone ,'•. 􀀬􀁯􀁦􀀱􀁦􀁬􀁥􀁪􀁨􀁲􀁾􀀠􀁦􀁩􀁬􀁴􀁥􀁲􀁪􀁊􀁲􀁥􀀮􀁾􀁳􀁥�
�􀁩􀁩􀀱􀀠ihe sludge ", dewatering process. The sludge is . dewatered to a cake with an approxi, mate dryness of 34 perc.ent. Addition-. ally, anaerobically digested sludge is mixed with
primary and secondary sludges. A portion of the sludge is dewatered using a single two meter belt press to a 20 percent dryness. 􀀬􀁯􀁰􀁴􀁩􀀹􀁮􀁾􀀻􀀱􀁾􀁾􀁥􀁳􀀡􀁴􀁬􀀬􀁾􀁧􀁥􀀠􀀧􀀢􀀭􀀬􀀬􀁾􀀬􀀮􀁾􀀮􀀠with
􀀢􀀧􀁡􀁤􀁤􀁩􀁴􀁩􀁯􀁮􀁾􀁬􀀮􀁬􀁩􀁭􀁥􀀠spread Qulin 􀁾􀁭􀁩􀁩􀁬􀁩􀁬􀁩􀁦􀁴􀁳􀀢􀀠and compacted bypeavyequipmeat ',' •. , until ttie desired monofill 'elevation is ','. ' , achieved. Class
"A" biosolids from the Central Regional Wastewater Class "B" biosolids are applied on farmlands at agronomic System are used as an artificial soil amendment in customer loading rates
which increase crop yield and lower the cities landfills. farmer's production costs. 
. .,', Central Regional Wastewater System Service Area Contracting Parties Irving.............................. 1957 Grand Prairie............. 1957 Farmers Branch 1957 Dallas..................
1957 Carrollton ...................... 1967 AriinglOn ....................... 1973 Bedford........................ 1973 Euless............................ 1973 D/FW Airport................
1973 Mansfield........................ 1974 GraIJevinc... .... ............ 1975 Col eyville.. . ....... 1975 North Richland Hills 1975 Hurst. .................... 1975 Coppell.. 1976
I'ort Worth..... . ......... 1976 Keller.. 1984 Richland Hills Flo Worth Hurst ,, , D/FW Airport , ,, Irving " ,, .' , " , CRWS TREATMENT PLANT Dallas Duncanville. 1984 Cedar HilL..
1985 Southlake.. 1988 Addisoll.. 1995 Arlington Grand p,-airie,[1., 􀁾􀀠Dallas Central Regional Wastewater System ','. Service Area Trinity River Basin Fort Worth Texas 
A Cleaner Trinity . '. . The Trinity River basin lies iJi eastern ... is the i3rgestinland population center in . . "'Texasandnasa􀁴􀁯􀁴􀁡􀁬􀁬􀁾􀁮􀁩􀁴􀁨􀁩􀁩􀀨􀀳􀀶􀀰􀂷􀂷􀀠... ····theUnlted
SiiltesalldhasCalwaysl1ada miles. The t6talaiea drained by the . profound impact on water quality. In Trinity River and its tributaries is 17,969 1925, a State Health Department report
square miles,orapproximately six;stated, "The flow below Dallas for percent of the state's land area. many miles does not impress one as . Dallas and Fort Worth, which were being that
ofa river. The stench from founded on the banks of the Trinity its inky surface (is) putrescent with the River in the mid-1800s, totally dominateoxidizirig processes to which the the
upper portion of the Trinity River shadows of overarching trees add basin. 􀁔􀁨􀁥􀁄􀁾􀁬􀁬􀁡􀁳􀁬􀁬􀀧􀁯􀁲􀁴􀁗􀁯􀁲􀁴􀁨􀁩􀁮􀁥􀁾􀁯􀁰􀁬􀁥􀁸􀀠stygian blackness imd the suggestion of ... :L
....;.;. .. i􀂷􀀢􀁾􀁁􀀺􀀻􀀻􀁦􀁾􀀻􀀺􀀠"-." 􀁾􀁾􀀮􀀠.' . some mythological river of death. With This burden offiltti tnepu'iifying-agen:cjes of the stream are prostrated. It lodges against
obstructions in the . . stream and rots; becoming hatcheries of mosquitoes and malaria. A thing of beautY is thus transformed into one of hideousdanger." In the early years of the Dallas
IFort Worth metropolitan area's development, it was not 􀁾􀁾􀁾􀁯􀁊􀁰􀀮􀁬􀁊􀀱􀀺􀁢􀁮􀀠fqr. rrtajor tribu.taries ofthe Triniiy River to rundry. 􀁔􀁯􀁤􀁡􀁹􀀬􀁢􀁥􀁣􀁡􀁾􀁳􀁥􀀺􀁯􀁦􀀠tIie major
lakes in .the . upper watershed and wastewater plant : discharges, the Trinity Riverflows with more volume every year. In dry ". \\leather, itis not at all uncommon for the base flow
of the Trinity River to be 95 percent treated wastewater. The Trinity River remains vulnerable and provides very little dilution. Because of these considerations, wastewater treatment
plant operators process influents to the highest advanced treatment standards in the nation. Approximately three and one-half million people are served by eight major regional wastewater
treatment treatment plants operated by the Trinity River Authority, Dallas, Fort Worth, Garland and the North Texas Municipal Water District. Wastewater facilities operated by these
entities release more than 500 million gallons per day of treated wastewater that has 98 percent of all conventional contaminants removed. As a result of our combined efforts, the Trinity
River 􀁪􀁳􀀮􀁾􀁯􀀠􀁬􀁯􀁮􀁧􀁥􀁾􀀠anyone's 􀁶􀁾􀁲􀁳􀁩􀁯􀁮􀀠of a "ipythologicalriver qfdeath." :, ..... ," .. ,", .. .' -', . Trinity RiverAuthority of Texas . Central Regional Wastewater
System 6500 West Singleton Blvd. Dallas, Texas 75212 -ar-EO. Box 531196 Grand Prairie, Texas 75053-1196 (972) 263-6078 Fax: (972) 264-1382 
Trinity River Authority of Texas Northern Region Office DATE: January 16, 2001 FILE: 3110.102 TO: MEMBERS, Advisory Committee Central Regional Wastewater System REMINDER NOTICE -Wednesday,
January 24, 2001, 10:30 a.m. MEETING PLACE· Central Regional Wastewater Treatment Plant , 6500 West Singleton Blvd., Gflilnd Prairie. Texas ..􀁉􀀬􀀡􀀺􀀺􀀺􀀺􀀺􀀺􀀺􀀽􀀽􀀽􀀽􀀽􀀽􀀽􀀽􀀽􀀽􀀽􀀺􀀺􀀺􀀺􀀺􀀺􀀺�
�􀀺􀀺􀀽􀀽􀀽􀁾􀀽􀀽􀀽􀀽􀀺􀀺􀀺􀀺􀀺􀀺􀀺􀀺􀀺􀀺􀀽􀀽􀀽􀀽􀀽􀀽􀀽􀀽􀀽􀀽􀀽􀀽􀀽􀀽􀁉􀁊􀀠THIS IS A REMINDER notice for the meeting of the Central Regional Wastewater System Advisory Committee scheduled
for 10:30 a.m., Wednesday,January 24.2001 at the c;entral Regional Wastewater Treatment Plant in Grand Prairie, at 6500 West Singleton Blvd., Grand'Prairie, . Texas. You are invited
to lunch immediately following the meeting. Please RSVP to Cheryl Abbott at 817-439-5100 or abbottc@trinityra.org. The primary purpose of this meeting will be the Series 2001 Bonds.
Enclosed for your review are an agenda; minutes of the September 12; 2000 meeting; meeting; a Planning. DeSign & Construction Status Report; and a memo concerning the issuance of the
Series 2001 Bonds. Due to the importance of this meeting. please plan to send a representative. If you have questions prior to the meeting. please contact this office at 817-493-5100.
.: ":. tt/aAAhl //. 􀁡􀁶􀁾􀀯􀀬􀁾􀀠&t;;:, 􀁾􀀠t;􀀬􀀢􀀬􀁾􀁃􀀮􀀯􀁾WARREN N. BREWER Regional Manager ItJ!Oi2.MII7/O¥ 􀁾􀁬􀀢􀀧􀁦􀁲Northern Region IJo..Ip 􀁓􀁾􀀯􀁾􀀠(0 f<,.MO,f'-AVe-c::. fcea
>0 -rt.f14.-, 􀁾C.Ali􀁾e"C-7 c: Danny F. Vance. General Manager Patricia M. Cleveland. Manager. Operations 􀀬􀁁􀀯􀁾􀁾􀀼􀀻􀁬􀁬􀁊􀁵􀁯􀁲􀁮􀀻􀁔􀀠􀁩􀀯􀁖􀁍􀁉􀀦􀁾􀀧􀁩􀀮Bill L Tatum, Manager.
CRWS 􀁁􀁬􀁾􀀠􀀨􀀧􀁾􀀠􀁾􀀠􀁾􀁾􀀤􀀮􀀠• P.O. Box 240 Arlington, Texas 76004-0240 (817) 493-5100 􀀷􀀱􀁊􀀮􀁾􀀠􀁾􀁉􀀾􀀠
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