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ECM STANDARD OPERATING PROCEDURE Collection of Grab Ground Water Samples From Temporary Sampling Points - Direct Push or Auger Prior to drilling temporary sampling point locations and analytical methods for soil and water samples are designated based on the regulatory requirements and objectives of the sampling program. Permits are secured prior to drilling, and utilities are located by an underground utility detection company. The borings are installed by a licensed drilling contractor using direct push methods. Borings are logged in accordance with ECM Standard Operating Procedure-Logging Method. Soil samples are collected from the borings at intervals no greater than 5 ft using a hydraulic sampling device lined with 1- or 2-inch I.D. disposable poly-vinyl or new or steam-cleaned brass or stainless-steel tubes. Samples are collected in accordance with ECM Standard Operating Procedure-Soil Sampling - Direct Push. ECM will attempt to collect a soil sample immediately above the saturated zone. The soil samples will be field-screened for analysis with an organic vapor meter (OVM) in accordance with ECM Standard Operating Procedure-OVM Readings. Upon reaching the targeted depth in each of the borings, (commonly about 3 ft below the estimated ground water level), the direct-push equipment is backed out. If necessary to prevent the boring from collapsing, the appropriate length of 1-inch diameter 0.010-inch-slotted and blank PVC casing is advanced into the saturated zone. A water level meter is used to measure depth to water. Depth to water is measured to the nearest 0.01 ft and noted on the sampling form. Ground water samples are collected from the wells using disposable bailers, or steam-cleaned teflon bailers, or steam-cleaned stainless steel bailers. The water samples are placed into the appropriate container for the analysis to be performed. Pre- preserved sample containers may be used or the analytic laboratory may add preservative to the sample upon arrival. Duplicate samples are sometimes collected from each well as a back-up sample and/or to provide quality control. The samples are labeled to include the project number, sample ID, date, preservative, and the field person's initials. The samples are placed in resealable polyethylene bags and in an ice chest (maintained at 4°C with blue ice or ice) for transport under chain-of- custody to the laboratory. The chain-of-custody form includes the project number, analysis requested, sample ID, date of analysis and the ECM field person's name. The form is signed and dated (with the transfer time) by each person who yields or receives the samples beginning with the field personnel and ending with the laboratory personnel. A trip blank may accompany each sampling set. The trip blanks are analyzed for some or all of the same compounds as the ground water samples. The temporary ground water sampling points are abandoned according to local requirements after ground water samples have been collected. Generally the casings are pulled and the borings are grouted to the surface with a mixture containing Portland Cement and 3 to 5% bentonite. C2:\sop\gwtsp Jn02