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A-3 <br /> 3.2 Lithologic Logging <br /> A log of soil conditions encountered during the drilling and sample collection (Enclosure A) was <br /> maintained using the Unified Soil Classification System (Enclosure B) by an AMV geologist <br /> All boring logs were reviewed by a California registered geologist <br /> The collected soil samples were examined and the following information recorded boring <br /> location, sample interval and depth, blow counts, color, soil type, moisture content (qualitative), <br /> and depth at which ground water (if present) is first encountered Also recorded on the soil <br /> boring logs was the field screening results derived from the use of a portable PID <br /> 3.3 Disposal Procedures <br /> Soils and fluids that were produced and/or used during the installation and sampling of bonngs, <br /> and that were known or suspected to contain potentially hazardous materials, were contained <br /> during the above operations These substances were retained on site until chemical testing had <br /> been completed to determine the proper means of disposal Handling and disposal of substances <br /> known or suspected to be potentially hazardous materials complied with the applicable <br /> regulations of DHS, the California Department of Water Resources, and any other applicable <br /> regulations Soils and fluids produced and/or used during the above-described operations that <br />. appeared to be potentially hazardous materials were disposed of appropriately <br /> Residual substances generated during cleaning procedures that are known or suspected to pose <br /> a threat to human health or the environment were placed in appropriate containers until chemical <br /> testing had been completed to determine the proper means for their disposal <br /> 4.0 SAMPLE CUSTODY <br /> This section describes standard operating procedures for sample custody and custody <br /> documentation Sample custody procedures were followed through sample collection, transfer, <br /> analysis, and ultimate disposal The purpose of these procedures is to assure that (1) the <br /> integrity of samples was maintained during their collection, transportation, and storage prior to <br /> analysis and (2) post-analysis sample material was properly disposed of Sample custody is <br /> divided into field procedures and laboratory procedures, as described below <br /> 4.1 Field Custody Procedures <br /> Sample quantities, types, and locations were determined before the actual fieldwork commenced <br /> As few people as possible handled samples The field sampler was personally responsible for <br /> the care and custody of the collected samples until they were properly transferred <br />