s'4 , O,p n - CODSumBIS k POW 8f m h - y company ' PBL 0379-01 80Eol-lo General Offices: 212 West Michigan Avenue, Jackson, Michigan 49201 * (517) 788 4550 March 1, 1979 Dr Robert Romano US Nuclear Regulatory Commission Environmental Specialist Branch P-235 Washington, DC 20555 Dear Romano Enclosed please find a copy c f the information that was telecopied by Consumers Power Company to your offices on February 28, 1979 Also, for clarification, please find a draft copy of the revised Midland Scope Statement. I hope we have a chance to get together during your next visit to Michigan. Please call if you have any questions concern' Midland. Sincerely .Ad4 P Brad Latvaitis Aquatic Biologist PBL/jp Enc p 6 d\ 7003080 30/. , ..* . , EGIBIT 3 COIISU'ERS PCWER CCMP/JiY SCCPE STATEEIT AQUATIC ECCLCGY ASSESSE;T FOR MIDIJdTD PLAIiT FEBRUARi 9, 1979 > . i b . TABLE OF COEITS Page LIST OF FIGURES . 11 LIST OF TABLES. iii . A. INTRODUCTICN. 1 B. OBJECTIVES. 1- 2 C. METHODOLOGY AND EXPERDEITAL DESIGN . '2-11 1. Icng Ter= Assessment Monitoring . h- 9 a. Phytoplankten . h b. Periphyton. ,. h c. Zooplankton . 5 * d. Macroinvertebrates. 5 6 e. Sediment. '. f. 'iater Chemistry . 6- T g. Fisneries . 7- S h. Ichthyoplankten . 8- 9 ' 2. Cooling Pond Monitoring . 9-10 3 Impinge =ent and Entrainment Mcnitoring. 10-11 h. Documentation of Fish Migration and Distribution. 11 ll-lh D. "r"A"a*S.r . E. QUALITY PRCGRAM . lk-15 ,e n,-. ., . ^) .* . uh.n u. %m. .,.os s ul.4 J . 1C */ p.J r.m o= UU~ . L.".m mL.'.Lt. m* m. Lb 2. n*Cm.Yvw D..T2. .L.6 R m.cv . -i- s . t i . LIST OF FIGUP.ES ?aste 1. Tittabavassee River near Midland Plant indicating long term assessment monitoring sampling locations . 19 2. Tittabawassee River near Midland Plant indicating fisheries sampling locations . 20 3 Midland cooling pond monitoring locations. 21 . -ii- s . - t LIST OF TAB 1EO . Page . 1. Midland Plant assessment monitoring schedule . IT . 2. Preoperational and operational vater quality monitoring near Midland Plant . 13 , e -iii- . 8 , ' EXHIBIT 3 SCOPE STATEMENT A. Introduction The Consultant shall conduct an aquatic assessment progran in the vicinity of the Consumers Power Midland Plant, Midland County, Michigan. Prelimi- nary assessment activities have been conducted for the Owner during 1977 and 1978. Data gathered during 1977 and entitled " Preliminary Water Quality Survey of "he Tittabawassee River, Midland, Michigan" (CMU 1977 Report) and 10 CFR Part 21 as amended, included herein and made a part hereof by reference, is furnished for the Consultant's information. Said data include species diversity and abundance determinations, a description of the site, sampling methods and techniques, study design rationale and URC guidelines for reporting defects and noncompliance. B. Objectives The primary objectives hereunder are to design and perform an assessment program to adequately evaluate the effects of Midland Plant operation by comparison of control and experimental, operational and preoperational values of selected ecological parameters that shall satisfactorily indicate changes in distribution and abundance of the aquatic ecosysten near Midland Plant. The assessment program shall include identification and monitoring of definable pre-existing environmental stresses to provide a measure of the potential synergistic effects of future Midland Plant operation. Also, the following preoperational objectives shall be accomplished: 1. predict and assess the ecological implications of various cooling pond discharges on the Tittabawassee River during the Midland Plant opera- tion, 2. describe the aquatic ecosystem of the Midland Plant cooling pond, 3 determine the quantity, importance and effect of entrainment and in- pingement associated with river intake procedures, h. document the origin and extent of fish novement and distribution in the Tittabawassee Fiver near the Midland Plant, i . * i, . 2 5 define the relationship between Tittabawassee River temperatures above and below Dow dam, and at the point of the Midland Plant intake, and 6. conduct a groundwater monitoring program to assess the imperviousness of the clays and dikes of the Midland cooling pond. C. Methodolory and Experimental Desicn The methodology for this assessment progran shall include: (1) the collection of quantitative and qualitative biological and lim- nological data, (2) utilisation of available data and literature, (3) development and application of a conceptual codel of the Tittabawassee River / Midland Plant cooling pond system including a perspective of en- } trainment and impingement impact, (h) development and application of a riverwide Tittabawassee water quality cathematical model, and (5) appropriate statistical treatment of assessment data to prepare a defensible impact assessment and provide maximum usefalness of the data base. Various aspects of this assessment progrs= including: Dissolved oxygen sags, blue-green algae bloons and the interactions of temperature with toxic materials shall include extensive literature reviews and be presented to the Owner as separate reports. (see Section D and Section C.2.) The monitoring effort shall be coordinated with daily river level fluctua- tions which are a result of upstream hydroelectric generating activities of the Wolverine Power Ccepany. Accurate flow records are available from the USGS Station upstream of Midland Plant. Data handling shall be accomplished as described in Secti;n F. Prior to the initiation of assessment activities , the Consultant shall pro- vide a detailed rationale for the proposed experimental design based on the s 3 results of preliminary assessment activities conducted for tha Owner by consultants during 1977 and 1978, as well as, the available pertinent literature. The experimental design shall indicate the level of detection af measurable change attainable for each parameter and the confidence with which each change can be detected (e.g. for periphyton, the design can seasure a 30% change with 90% confidence, etc. ). Experimental design shall include a comparisen of the percent change and level of confidence attain- able for each parameter using a variety of sampling locations, frequencies and replications. The experimental design used for assessment activities shall be that which can measure a reasonable change with acceptable con- fidence and yet be practical and economically feasible. Sensitive species or groups of organisms that shall be used to reasure change for each para- meter shall be identified and the rationale for their use shall be provided. In addition, the Consultant shall prepare in assesstent report of all data collected near Midland Plant by the Owner, during 1977 and 1978. This report shall be submitted in conjunction with the report providing the experimental design rationale as described in Section D.3 The result shall be the establishment of a firm experimental design that requires minimun future modifications and provides maximum usefulness and treatment of the resulting data base. Rigorous statistical analyses shall be utiliced to verify the experimental design and be provided to the Owner by the Consultant as part of the com- prehensive annual report (see Section D.5). The following assessment nenitoring activities are provided as an indication of the scope of work the Owner assumes shall be required to properly assess the aquatic ecosystem. These activities are no_1 based on a finn experi- cental design. However, selected ecological parameters which may be satis- factory to indicate measurable change are indicated. The final experimental design modifications and rationale are to be provided by the Consultant as indicated above as a result of the report described in Section D.3 . 4 1. Long Ter: Assessment Monitoring The long term assessment monitoring program shall provide a comparison of pre- operational and operational ecological conditions of the Tittabavassee River. Sampling locations shall be established to co= pare the aquatic ecosystem both upstream and downstrea= of the Midland Plant facility in order to indicate i==ediate and long-ter= effects of thermal, chemical and biological discharge. In addition, the identification and contribution of existing environmental stresses to the surrounding biota shall b9 defined. Proposed sampling locations to accomplish these objectives are schematically represented in Figures 1 and 2, attached hereto and made a part hereof. Proposed parameters, sampling gear, frequency, number of replicates, duration of sampling and number of samples to be collected are set forth in Table 1 hereto. a. Phytoplankton - Duplicate wholevater samples shall be collected during the daily flow regime in April, June, August and October 1979 and sampling loca- tions indicated in Table 1 and illustrated in Figure 1 hereto. Phytoplankton densities, relative abundance of dominant groups and identification of dominant species (t55 of the total) within each group shall be determined. Biovolume for dominant species and chlorophyll a values vill be determined following EPA standardized techniques. Samples shall be retained by the Consultant in the advent that additional analyses are required. b. Perithyton - Duplicate artifical substrates (Periphytometer II) shall be utilized during April, June, August and October 1979 at sampling transects indicated in Table 1 hereto and illustrated in Figure i hereto. Sampling locations within a transect shall be selected to represent extremes of river flow velocity and to compare the effects of thermal addition. Sampling with Feriphytometer II's