This handbook is an updated version of the 1991 Edition. It is intended to serve as a resource document for optimizing the performance of existing surface water treatment facilities to provide protection from microbial contamination. Since 1988, the Composite Correction Program (CCP) has been developed and demonstrated as a method of optimizing surface water treatment plant performance. The approach is based on establishing effective use of the available water treatment process barriers against passage of particles to the finished water. Specific performance goals are used by the CCP approach to define optimum performance for key treatment process barriers such as sedimentation, filtration, and disinfection. The purpose of this handbook update is to incorporate new information and to integrate the other complementary programs (e.g., Partnership for Safe Water). Experience gained from over 70 Comprehensive Performance Evaluations (CPEs) and 9 Comprehensive Technical Assistances (CTAs) provides the basis for updating the CCP approach presented in this handbook. In addition, eight state pilot programs have provided the basis for the area-wide application of the CCP. Significant additions and modifications to the CCP included in this handbook are: - An expanded discussion of the relationship between optimized performance and public health protection. - An expanded definition of optimized performance goals for microbial contaminant protection. - Considerations for selection of CPE and CTA candidates. - Clarification on CCP terminology. - Description and use of the Partnership for Safe Water software for compiling and analyzing turbidity data. - Updated process criteria for completing the major unit process evaluation. - An updated database of completed CPEs and CTAs and a summary of typical factors found limiting performance. - Streamlined forms for collection of field data. The primary intended users of this handbook include regulators (e.g., federal and state agency
personnel) and non-regulators (e.g., utility personnel and consultants).