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Task 9- 72-Hour Groundwater Pump Test Workplan A 72-hour groundwater pump test will be conducted on monitoring well PT-MW-3 in an attempt to identify transmissivity and other hydrologic properties in the shallow aquifer both on and off site Variations of groundwater extraction rates and drawdown in the other monitoring wells onsite will help to determine shallow aquifer properties and identify if a groundwater pump and treat system would be a likely remediation plan for groundwater cleanup The pump test will also remove existing free- product from the previously identified area on the property where maximum concentrations of petroleum hydrocarbons are present Transducers will be placed in the other wells during the test to determine aquifer response A separate and detailed workplan for this test will be developed and submitted to PHSEHD for review and approval as part of this task Task 10- Problem Assessment Report Preparation A Problem Assessment Report (PAR) will be prepared that will have incorporated within it a Site Conceptual Model with all available data This report will take all existing data and present it in the correct manner to describe the nature and extent of the soil and groundwater contamination encountered and recommended follow-up actions At a minimum the report will include (1) a discussion of the site history, (2) a description of the fieldwork conducted at the site, (3) the analytical laboratory results, (4) a scaled site plan map, (5) drilling logs, (6) an estimation of contaminant mass, (7) computerized modeling results, and (8) conclusions The PAR will also address data gaps that exist and any recommended further investigation required The Problem Assessment Report will also include Human Health Risk Assessment as a Tier 2 Risk Based Corrective Action (RSCA) analysis based on site-specific data obtained from subsurface investigations conducted at the site using a computerized spreadsheet program titled RBCA Tool Kit for Chemical Releases, Version 14, developed by Groundwater Services, Inc of Houston, Texas. The RBCA software was developed to meet the requirements of the American Society for Testing and Materials (ASTM) PS-104 Standard Provisional Guide for Risk-Based Corrective Action Input parameters used for the analysis will include soil and groundwater analytical data collected from the site Task 11- Quarterly Status Reporting (4 events per year) Quarterly Status Report (QSR) will be prepared and submitted every 90 days to the RWQCB as required until otherwise directed The QSR will provide a summary of all actions conducted on the site during that quarter Main\D\Environmental\Parmafrexaco\Workplan\042003 wpd 16