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Storm Water Outfalls The Apache Plastics/Certainteed Storm Water Flow map dated 5/22/2001 shows storm water interceptor sand/oil haps where the storm water drainage system for the site collects prior to discharging from the site. Sa,-e Recommendations Sage recommends collecting a sediment sample from each of the two (2)traps to determine whether potential impact from the site is being picked up as storm water drains across the property and is discharged at the traps. These samples will be analyzed for pesticides,herbicides,VOCs and TPH-GRO/DRO. No other issues were noted during Sage's research of the site information that would require further investigation. SCHEDULE After receiving authorization to proceed, we will begin the project work immediately. Sage will prepare the application for the San Juaquin County Enviromnental Health Department Well & Boring Permit. Once the permit has been approved (usually within 10 days), Sage will mobilize to the site and complete the site work within two weeks and complete a draft report within four weeks of completion of the site work. Sage will incorporate any comments received from Westlake within 10 work days and issue an independent, final report in both Microsoft Word and Adobe PDF formats. The report will include a discussion of the drilling operations, a site map showing the drilling locations,the PID survey results,the analytical results in a tabular format and the findings presented in a clear and useful format. All laboratory and analytical work will be performed using standard turnaround times with no rush results requested. Prior to mobilization, Sage will prepare a Site Specific Health& Safety Plan (SSHASP) for use during the site work and will clear underground or embedded utilities at the site by calling the 1- 800 Call Before You Dig and discussing drilling locations with plant personnel. Westlake Chemical Corporation Lodi-Due Diligence Assessment 5