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INFerNITCUR.C. SACRAMENT O 2.0 Collection of Samples 2.1 Soil Samples LSoil samples are subjected to field analysis with J y t either a flame ionization detector (FID) or a photoionization detector (PID) with.-and 10.7 EV lamp immediately-following sample collection. The field analysis is performed as follows: '. 1. A representative aliquot.of the sample is.placed in' a glass jar:or resealable freezer bag and broken up (to the extent possible) to allow the release of contaminant vapors. L 2. The container is exposed to direct sunlight for a period of ten:minutes to facilitate the volatilization of organic compounds within the sample. L 3. The probe of the FID or PID is inserted into the container carefully, and a sample of the vapor is drawn into the instrument. The maximum numerical L reading observed is noted on the drilling log. All soil samples to be submitted for laboratory 'analysis are collected in'brass tubes or precleaned glass jars. The ends of the brass tubes are coveredwith Teflon tape P and fitted with airtight caps. Glass jars are laboratory cleaned and fitted with either ` teflon caps or foil covers andlastic caps. The.selection of samples to be'submit P P p ted for laboratory analysis will be based on the filed observations'and headspace analysis. L [ 2.2 Ground Water Sampling 1� Ground water samples will be collected for laboratory analysis using"the Lprocedures given below. 1. Open the temporary well and measure the organic vapor concentration with a FID or PID. 2. Measure the water and non-aqueous product levels (if any) in the well using a decontaminated measuring device. All measurements must be made to the nearest 0.01 foot, and measured relative to the top of the'casing. Record the depth of the water .and product in the field notebook. A-2