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A sample chain of custody form is depicted in the figure on the <br /> next page. The site name, collector signature, date and time of <br /> collection will always appear. The number and condition of <br /> containers, description of samples and sample identification <br /> numbers will also be included. The name and signature of all <br />' individuals, with inclusive dates of possession, will be recorded. <br /> State Certified Laboratories <br /> All soil and water samples will be analyzed by a commercial <br /> laboratory certified by the California Department of Health <br /> Services for the intended analysis . Documentation of certification <br /> will be presented in all reports containing analytical results . <br /> Detection Limits <br /> Minimum detection limits for analytical procedures are: <br />' COMPOUND WATER SOIL METHOD* <br /> (Ppb) (Ppb) <br /> ----------- ----_- --------------------------- <br /> Benzene 0 . 3 5. 0 ----------------- <br /> EPA 602/8020 <br /> Toluene 0. 3 5 . 0 EPA 602/8020 <br /> Xylenes (Total) 0 . 3 5. 0 EPA 602/8020 <br /> Total Petroleum <br />' Hydrocarbons 500 . 0 1 , 000. 0 DHS mod. 8015 <br /> (GC-FID) <br /> ' Alternatively, EPA method 8260, Fuel Fingerprint by one- <br /> pass mass spectrometry may be substituted. <br />' Sample Preservation and Holding Time <br />' PARAMETER---MATRIX CONTAINER HOLDING TIME PRESERVATION <br /> -- ----------------------------------- <br /> Soil 3" stainless 14 days Frozen ---- <br /> TPH or brass <br /> I Water cylinder 40 days 4°C <br /> -------------------------------------------------------------- - <br /> Soil 40ml glass vial 14 days 40C - - <br /> BTXE teflon faced <br /> Water silicon septum 40 days 40C <br /> -- -- ------ <br /> Soil 3" SS or brass 14 days --- <br /> Organic Lead cylinder <br /> Water 40ml glass vial 4 days 4°C <br />