ARCHIVED REPORTS_XR0012715 - Laserfiche WebLink

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N i ��_ � � Gw... prevkant In tho Boil and in not likely to mirlrnd the client or contractor into offhauling or bnckfillintt with rail atockpilee that oro ralntively clean at the ourfnce, but unacceptably contaminoted through the remainder of their volume. CONPIIIMING SAMPLES OV STOCKPILED MATF.RIA1.: Snmptno warn obtained of ntockpiled mate-ri.ail Wft an the* nate after the excavntion of the main gasoline storage Lanka, Srimple collection points were laid out In a Pattern donigned to ourvey the entire area over which the material hrd been spread. The SURVEY designation indicates that the pattern wo" aelected prior to digging into the mibimt material. At each sampling Point in the Pattern the surface nail wail dug away and Sample material woo obtained Train a depth of six or inure Inchon below the aaaratrd r.urfeco. This won done to avoid Including the? surface Boll which was presumed to be thoroughly aerated and obtain soil that wan not open to the air In order to confirm that the material van sufficiently aerated to require no furthor hnndling. SAMPLE CONTAINERS Our firm uses new eample conLnindra of the typo apecifled by either EPA or the RWQCA for the collection of aomples at altos whore underground storage tanks are Involved. Water samples are contained in 40 ml vatatila organic analyahs vials MAO when anolyais for gasoline and similar light volatile compounds is intended. These containeraa are prepared according to EPA SW 846 and will contain a small amount of preservative when the analysis is for TFIi no gasoline or EPA 642. Vials intended for EPA 601 onalyuin and EPA 624 GCMS procedures are not preserved. Closure is accomplished with an open headed (syringo accessible) ploattc screw call brought down on top of a Teflon faced septum which is uned to soul the eample without headspacr:. r Water samples intended for senivolatile and nonvolatile analysis such as total oil and grease (TOO) rind dIcAel (TPII 1IBF) are collected and transported in properly prepared now gloss liter bottles. Dark amber glass is used in the manufacture of these battles to reduce any adverse effect on the sample by sunlight. Antimicroblal preservative may be added to the sample liquid if a prolonged holding time is expected prior to analysis. Cloaure to " accomplished with a heavy plastic screw cap. Soil samples for volatile, semivolatile and nonvolatile analyses arc all collected In properly prepared now brass liners which are 2 Inches In diameter by 4 inches in length. Closure Is accomplished with press fit plastic end caps which are fitted to the open ends of brass tubo after a ----..-. _ - alu.e-inum-.foil-.Is._wropped--over.-_the_-exposed._.sans_ple-materisl.......J4 — contributing/nonsubtractive tape is wrapped completely around the Mat arenas where the plastic tapas tweet the outer well of the brass tube, alio preservative other than cold storago Is uned on samples captured in sample contalnars of this type. Sampling Report 88306-M-3 Chevron 1918 SECTION FOU11*0page .7