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3.0 STANDARD OPERATING PROCEDURES <br /> Standard Operating Procedures (SOPs) for activities performed during this investigation <br /> are included in Appendix A. These SOPs include: <br /> • SOP #1 Equipment Decontamination <br /> • SOP #2 Monitoring Well Water Level Measurement <br /> • SOP #5 Ground Water Sample Collection <br /> • SOP #6 Surface Water Sample Collection <br /> • SOP #7 Sample Documentation, Handling, Packaging, and Chain of <br /> Custody <br /> • SOP #9 Field Parameter Instrument Calibration and Measurement <br /> 4.0 DECONTAMINATION PROCEDURES <br /> The overall objective of ground and surface water sampling programs is to obtain water <br /> samples that accurately depict the chemical and/or physical conditions at a site. <br /> Extraneous materials can contaminate water samples during a sampling program. While <br /> well development and purging procedures may help to remove contaminants, these <br /> procedures may not be completely adequate, therefore laboratory test results of the <br /> collected water samples maybe inaccurate due to outside contamination. General <br /> decontamination procedures are presented in SOP #1. All equipment that will contact <br /> sampled media will be decontaminated. General procedures that apply to <br /> decontamination are listed below. <br /> • Dress in suitable safety equipment to reduce personal exposure. <br /> • Wear clean or new rubber or nitrile gloves during decontamination <br /> activities and when handling decontaminated equipment. <br /> • Use new equipment, such as disposable filters and silicon tubing that is <br /> certified clean by the manufacturer. <br /> • Decontaminate all wash/rinse tubs before initial use. <br /> • Replace rinse and detergent waters, unless in garden sprayers, with new <br /> solutions between sample locations. In some cases, new solutions may be <br /> needed between samples in the same location. <br /> • Following decontamination, place equipment in a clean area or on clean <br /> plastic sheeting to prevent contact with contaminated soil. If the <br /> equipment will not be used immediately, cover the equipment or wrap it in <br /> plastic sheeting or heavy duty trash bags to minimize potential airborne <br /> contamination. <br /> Loveland Ready-Mix Concrete,Inc. 2 Telesto Solutions, Inc. <br /> 20 I%0227_km_lap,nc_gn_sep_mc I a«. February 2018-REI7 <br />