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S E C ® R <br /> fl I <br /> Attachment 3 <br /> Field and Laboratory Procedures JI <br /> Organic Vapor Monitoring Procedures <br /> Soil samples were collected 8 feet below ground surface (bgs) and were analyzed in the <br /> field for ionizable organic compounds using a photo-ionization detector (PID) with a 10 2 <br /> ultra-violet (UV) lamp The test procedure involved measuring approximately 30 grams I i, <br /> from an undisturbed soil sample, placing this sub-sample in a sealed container (either a <br /> zip-lock bag or a mason tar) The container was warmed for approximately 20 minutes !' <br /> (in the sun), then the head-space was tested for total organic vapor, measured in parts ,l <br /> per million as benzene (ppm, volume/volume) The instrument was calibrated prior to <br /> drilling using a 100-ppm isobutylene standard (in air) and a sensitivity factor of 55, which <br /> relates the photo-ionization potential of benzene to that of isobutylene at 100 ppm 1 <br /> II <br /> Laboratory and Sampling Procedures for Soil and Groundwater Samples , <br /> Selected soil samples were analyzed for total petroleum hydrocarbons as gasoline z <br /> (TPHg) by CA LUFT Gasoline method, total petroleum hydrocarbons as diesel (TPHd), <br /> ethanol, and methanol by EPA Method 8015, benzene, toluene, ethyl-benzene, xylenes <br /> (BTEX), and fuel oxygenates methyl tertiary butyl ether (MtBE), tertiary amyl methyl <br /> 'r <br /> ether (TAME), tertiary butyl alcohol (TBA), di-isopropyl ether (DIPE), ethyl tertiary butyl <br /> ether (ELBE), 1,2-dibromoethane (1,2-DBA), and 1,2-dichloroethane (1,2-DCA), by EPA ti <br /> Method 82606, and total lead by EPA Method 60106 <br /> t x <br /> Soil samples collected for chemical analysis were retained in brass sleeves, labeled, and ° <br /> capped with Teflon squares Soil and groundwater samples were placed on ice for <br /> transport to a California state certified laboratory accompanied by chain-of-custody <br /> documentation ' <br /> Waste Management r;, r <br /> Soil generated during excavation activities was temporarily stored onsite and covered <br /> with plastic sheeting or placed in DOT approved 55-gallon drums Water generated <br /> during decontamination procedures was temporarily stored in DOT approved 55-gallon Yr <br /> drums Soil and rinsate water was transported by a Chevron disposal contractor to an ' <br /> appropriate disposal facility Vit` <br /> '9 <br /> i <br /> A ; <br /> I��1 <br /> n F k <br /> g <br /> a' <br /> E � <br /> I Itn <br /> r <br /> I I <br />