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ik9l KLEINFELDER 4 2.1 Qualitative Field Screcnint� ' To provide a qualitative indication of the presence of volatile organic constituents in the soil and to monitor the constituent concentrations in the breathing zone, a portable organic vapor analyzer ' was used to screen the samples in the field The Photovac MictoTip`'' photo-ionization detector (PID) was used to measure total ionizable compounds in parts pet trillion by volume (ppmv) of vapor Soil samples obtained weie scieened in the field and the PID icadnn rs wete recorded on the 1 � boring logs No odors of discoloiation were noted in soil samples collected during advancement of soil borings B-1 throuj3h B-4 PID readings toi the samples collected ranged from 11 to 20 ppmv 1 43 GROUNDWATER COLLECTION 1 Groundwatet was not expected d1_1111111 out limited soil assessment at the Site However, during the advancement of Boling B1, btortndwatei \\as encountered at an auger depth of approximately 15 feet Hatlan Knoll floor PHS/EHD su`-ested \\e obtain a single "grab ' groundwater sample from beneath each tank A gioundwatei sample N\as collected from borings Bl and B3 in the vicinity of the taiiks investigated The samples were obtained by lowering a disposable bailer within each auger set Apptoximately 2 gallons of water was purged through the auger from borings B I and 133 pi for to collecting the gi oundwater samples New bailer string was used for each location No odor of sheen was noted from the two groundwater samples 44 PRODUCT STANDARD COLLECTION Product standard SSIH is unpotted and no lonnei stored at the Granite Construction site, therefore this product was obtained hom theft cuiient supplier Kent's Oil facility located at 3310 Minet St in Stockton Cal ifoinia A Kleinfeldei representative visited Kent's Oil facility on December 10 1998 and obtained a ,ample of the SS 1 H product, which was decanted into a sample containei The SC-250 product was obtained on December 11, 1998 from a large above ground storage tank located at the Granite Construction yard The sample was decanted into a metal "sample container' typically used in the construction industry for testing purposes The metal container was necessity because of the 111011 temperature of the product at the time of collection Sample handling was conducted as described in Section 4 5, with the exception that the samples weie not chilled or stored with other samples 1 1 20-1108-24 Col/20198 1211 111agc 8 of 16 © 1999, KIL1111 I&I Ing I-ebruary 5, 1999