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e ~IAnalytiCal T~ ServIces ~ e .:-....---..... Environmental Toxicology Chemical Testing . .... '....., -. - Field Services : 4 August 1999 , ; '''' :-~c O "'" .f"""II"""" ~ j=~= IVIr.Stephen L Gillett Director of Public Works City of La Porte ?O. Box 1115 La Porte. IX Ti572- i 115 PSS&J Proposal No. 99991 City of La Porte Wastewater Treatment Plant 001 TNRCC Permit No. 1 0206-001 NPDES Permit No. TX0022799 RE: Cost Proposal for Effluent Toxicity Reduction Evaluation (TRE) Services Dear Sir: PBS&J Environmental Toxicology Lab (PBS&J) is pleased to provide this cost proposal addressing a TRE for the City of La Porte wastewater treatment plant 0f'/'NTP) effluent This proposal is developed in accordance with the City permits and is fully responsive to your requirements. For your review, an effluent chronic biomonitoring test in May 1999 exhibited significant toxicity to Mysidopsis bahia at the effluent Critical Dilution of 95%. A second retest in July 1999 has exhibited significant chronic toxicity. The results of these biomonitoring failures as required by Section 4.a., page 27 must be submitted within 20 days of completed test failure; the next requirement by the TNRCC is to submit, within 45 days a general outline for initiating the TRE (see section 5.a.,pg 27) and within 90 days, submit a TRE Action Plan (see: Section 5.b.,pg 27, TNRCC Permit). The TRE is initiated on the "test completion date of the failed retest" . The TNRCC permits require at least quarterly biomonitoring with the effected test species (M. Bahia) during the TRE study period, The state permit has an "escape clause" (pg 29, section 5.e) for cessation oftoxicity, if no cause of toxicity is found. After a 12 consecutive monthly tests have been reported without toxicity, the City may notify the state of its intent to cease the TRE study and resume a normal biomonitoring schedule. The following Scope of Work provides a step-wise approach fur the TRE process: Scope of Work Task 1 - TRE Outline PBS&J will prepare a document to be submitted to the TNRCC containing general outline items to initiate the TRE for the City of La Porte WWTP. The EPA does not require this item. The outline will identify the project team from the City and PBS&J, summarize the test data that initiates the TRE and any other data or facts available conceming the toxic events. Task 1 COST: (3 hrs Sr, Scientist + 2 hrs Clerical) not more than: $500.00 ETOX Laboratory 888 W. Sam Houston Pkwy. S.. Suite 110. Houston. Texas 77042-1917. Telephone: 713.977.1500 · Fax: 713.977.9233 . www.pbsj.com