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r I i APEX 'ENVIROTECH, INC STANDARD OPERATING PROCEDURES container submitted for analysis is labeled to identify the job SOP-1 G, number. date,time of sample collection, a sample number unique to the sample,any in-field measurements made, SOIL, BORING SAMPLING sampling methodology, names)of on-site personnel, and any During drilling, soil samples for chemical analysis are collected m other pertinent field observations also recorded on the field excavation or boring log. thin-wailed brass tubes, of varying diameters and lengths (e.g..4 or B inches long by 2 inches outside diameter). Three orfour of Chain-of�ustody towns are used to record possession of the the selected tubes, plus a spacer tube,are set in an 8-inch long sample from time of collection to arrival at the laboratory. During split-barrel sampler of'the appropriate inside-diameter. shipment,the person with custody of the samples will relinquish k� them to the next person by signing the chain-of-cma y forms) Where possible,the split-barrel sampler is driven ib entire length and noting the date and time. The sample-control officer at the either hydraulically or using a 140-pound drop hammer. The laboratory will verify sample integrity,correct preservation, confirm sampler is extracted tram the borehole and the brass tubes, collection in the paper oontainer(s), and ensure adequate containing the soil samples, are removed. Upon removal from volume for analysis. the sampler, the selected brass tubes are either immediately trimmed and capped;with aluminum foil or'Teflon' sheets and It these conditions are met,the samples will be assigned unique plastic cepa or samples are extruded from the tubes and laboratory log numbers for identification throughout analysis and sealed within other appropriate,cleaned sample containers. The reporting. The log numbers will be recorded on the drain-of- samples are then hermetically sealed,labeled, andYfcal refrigerated custody forms and in the legaily-required log book maintained in for delivery,under strict dram-0oft to the armalytor the laboratory. The sample description,date received, client's laboratory. Those procedures minimize the potential for cross- contamination and volatilization of volatile organic compounds name,and any other relevant information will also be recorded. (VOC)priorto chemical analysis. One soil sample collected at each sampling interval is analyzed SOP-5 in the field using eftor portable photoionization detector(PID), LABORATORY ANALYTICAL QUALITY flame ionization detector,organic vapor analyzer,catalytic gas ASSURANCE AND CONTROL detector,or an axpl"meter. The purpose of this field analysis is to qualitativelydetennine the presence orabsence of In addition to routine instrument calibration,replicates,spikes, hydrocarbons,and the samples to be analyzed at the laboratory. blanks.spiked blanks, and cartified reference materials are The soil sample is sealed in either a brass tube,glass lar, or routinely analyzed at method-specific trequencies to monitor plastic bag to allow for some volatilization of VOC. The PID is precision and bias. Additional components of the laboratory then used to measure the concentrations of hydrocarbons within Quality AssurencelQuality Control program include: the containers's headspacs. The data is recorded on both field notes and the boring'',logs at the depth corresponding to the 1. Participation in state and federal laboratory sampling point. accreditation/certification programs; Other soil samples atm collected to document the soil andlor 2. Participation in both U.S. EPA Performance Evaluation stratigraphic profile beneath the project site, and estimate the studies(WS and WP studies)and inter-laboratory relative permeability;of the subsurface materials. AN drilling and performance evaluation programs; sampling equipment#rs either steam cleaned or washed in solution and doubly rinsed in deionizsd water prior to use at each 3. Standard operating procedures describing routine and site and between boreholes to minimize the potential for cross- periodic instrument maintenance; contamination. In the event the sol samples cannot be submitted to the 4 'Ouo��tandComectnre Action documentation analytical laboratory on the same day they are collected(e.g., P due to weekends or holidays), the samples are temporarily stored S. Multi-level review of raw data and client reports. until the firat opportunity for submittal either on ice in a coder, such as when in ths'fiekf,or in a refrigerator at Apex's office. SOP-3 SOIL CLASSIFICATION Soil samples aro daifiad according to the Unified Soil Classification Systwti.' Fiepreamb Live portions of the samples may be submitted, under strictd►ain-of-custody, to an analytical laboratory for furthar'examination and verification of the in-field da wfication and analysis at soil mechanical and/or petrophysical properties. The sol typos are indicated on loge of either excavations or bort 'riga together with depths corresponding to the sampling points and,ottwr pertinent information. SOP-4 SAMPLE IDENTIFICATION AND CHAIN-OF- CUSTODY PROCEDURES Sample identltkaboe'and chak"f-cusiodlr procedures ensure sample integrity as waft as document sample possession from the time of oollectlon to ultimate dlspostiL Each sample