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Mr. Larry Lipp • • KIMCO 01-02-008-CA October 17, 2002 Page 2 of 2 Drilling and sampling equipment will be decontaminated as follows: 1. Drill rig rods and drill bits will be steam-cleaned prior to use and between borings. Visible soil, grease, and other impurities will be removed. 2. Soil sampling equipment will be steam-cleaned prior to use and between each boring. Prior to individual sample collection, any sampling device will also be cleaned in a TSP solution and rinsed twice in clean water. Any visible soil residue will be removed. C. FIELD MEASUREMENTS Field data will be collected during various sampling and monitoring activities; this section describes routine procedures to be followed by personnel performing field measurements. The methods presented below are intended to ensure that field measurements are consistent and reproducible when performed by various personnel. C.1 Buried Utility Locations Prior to commencement of work on site, ADR will contact appropriate utility companies to have underground utility lines located. ADR will also visually survey the site to estimate the locations of potentially unmarked underground utilities. C.2 Lithologic Logging A log of soil conditions encountered during the drilling and sample collection will be maintained using the Unified Soil Classification System by an ADR geologist. All boring logs will be reviewed by California registered geologist. The collected soil samples will be examined and the following information recorded: boring location, sample interval and depth, blow counts (if applicable), color, soil type, moisture content (qualitative), and depth at which groundwater (if present) is first encountered. Also recorded on the soil boring logs will be the field screening results derived from the use of a portable PID or FID (if appropriate). C.3 Disposal Procedures Soils and fluids that are produced and/or used during the installation and sampling of borings, and that are known or suspected to contain potentially hazardous materials, will be contained during the above operations. These substances will be retained on site until chemical testing has been completed to determine the proper means of disposal. Handling and disposal of substances known or suspected to contain potentially hazardous materials will comply with the applicable regulations of DHS, the California Department of Water Resources, and any other applicable regulations. Soils and fluids produced and/or used during the above-described operations that are shown to contain potentially hazardous materials will be disposed of appropriately. Residual substances generated during cleaning procedures that are known or suspected to pose a threat to human health or the environment will be placed in appropriate containers until chemical testing has been completed to determine the proper means for their disposal. SUBSURFACE INVESTIGATION RESULTS REPORT