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APS ENVIROTECH, INC. . STANDARD OPERATING PROCEDURE Monitorin Wel(s SOP - .4 SOF' - Z SAMPLE IDENTIFICATION AND CHAIN- SOIL BORING SAMPLING OF-CUSTODY PROCEDURES Dunng drilling sail samples for chemical anaiysis are collected Sample identification and chain-af-custody procedures ensure in thin-walled brass tubes,of varying diarne%ers and lengths sample irtegnty as Yrell as document sample possession from (e g 4 or B inches long by 2 inches outside diameter) Three the time of collection to ultimate disposal Each sample or four of the selected tubes plus a spacer tube are set In an container submitted for analysis is labeled to identify the job 18-inch long spit-barrel sampler of the appropriate inside- number date time of sample collection a sample number diameter unique to the sample any m-field measurements made, sampling methodology name(s)at on-site personnel,and any Where possible the split-barrel sampler is driven its entire other pedinent field observations also recorded on the field length either hydraulically or using a 140-pound drop hammer excavation or bonrg log The sampler is extracted from the borehola and the brass tubes containing the soil samples,are removed Upon removal Chain-of-custody firms are used to record possession of the from the sampler the selected brass tubes are ether sample from time of collection to amval at the laboratory immediately tnmmed and capped v'h aluminum foil or'Teflon" During shipment the person Yrtth custody of the samples Pall sheets and plas;ie caps or the samples are extruded tram the relinquish them to the next person by signing the chain-at- tubes hain-aftubes and sealed within ether appropriate,cleaned sample custody tonm(s)and noting the date and time The sample- containers The samples are then hermericalty sealed,labeled, control officer at the laboratory will verity sample Integnty, and refrigerated for delivery,under sand chain-0f-custody,to correct preservation,confirm cailedion in the proper the analytical laboratory These procedures minimize the container(s),and ensure adequate volume for analysis potential for cross-contamination and volatilization of volatile organic compounds(VOC) pnor to chemical analysis If these conditions are met the samples will be assigned unique laboratory Icg numbers for identification throughout One soil sample collected at each sampling interval is analyzed analysis and reporting The log numbers will be recorded on in the field using erther a portable photoionrzation detector the chain-0f-custody forms and in the legally-required log book (PID) Rama ionization detector organic vapor analyzer maintained in the laboratory The sample description,date catalytic gas detector or an explasimeter The purpose of this received client s name and any other relevant information will field analysis is to qualdativeiy determine the presence or also be recorded absence of hydrocarbons and the samples to be analyzed at the laboratory The sail sample is sealed in ether a brass tube, glass far ar plastic bag to allow for soma vaiatt ization of VOC SOP` - S The PID is then used to measure the concentrations of L11130RATO F 1Y ANALYTICAL 4PUALfrY hy7rocarbons within the containers's headspace The data is ASSURANCE AND CONTROL. recorded on bath field notes and the boring logs at the depth corresponding to the sampling point In addition to routine instrument calibration replicates spikes, blanks,spiked blanks,and certified reference materials are Other sail samples are collected to document the sail and/or routinely analyzed at method-specsfic frequencies to monitor stratigraphic profile beneath the project ste and estimate the precision and bias Additional components of the laboratory relative permeability of the subsurface materials All drilling Quality Assurance/Quality Control program include a-id sampling equipment are either steam cleaned orwashed in solution and doubly rinsed in deionized rater prior to use at i Participation in state and federal laboratory each site and between boreholes to minimize the potential for accredtatsan/certification programs, crass-contamination 2 Participation in both U S EPA Pedarmance In the event the sail samples cannct be submitted to the Evaluation studies(WS and WP studies)and Inter- analytical laboratory on the same day they are collected(e g, laboratory performance evaluation programs due to weekends or holidays),the samples are temporarily Stored until the first opportunity for submittal either on Ice In a 3 Standard operating procedures describing rou4ne cooler,such as when in the field or in a refrigerator at Apes and periodic instrument maintenance, office 4 -Outof-Central"ICorredive Action documentation procedures,and, SOP - 3 SOIL CL45rSIFICATION 5 MA-level review of raw data and client reports Sail samples are classified according to the unified Sail m Classificatiari System Representative portions of the samples Sap - O May besubmhed,under stnctchain--of-custody,to an HOLLOW-STEM AUGER MONPTORING • analytical laboratory for further wmminaban and wnfication of WELL INSTALLATION AND the In-field classification and analysis of soil mechanical and/or DEVELOPMENT petrophysical proporbas The soil types are indicated an logs of e*ther excavations or bonngs together with depths Boreholes for moracring walls are dnlled using a truck- corresponding to the sampling poir#s and other pertinent mourrted,hallrnv-stem auger dnll ng The borehole diameter information will be a minimum of 4 inches larger than the outside diameter of the casing when installing well screen The hollow-stain auger provides minimal Interruption of dnlling while permbng