|
APEX ENVIROTECH, INC.
<br /> STANDARD OPERATING PROCEDURES
<br /> Soil Borings
<br /> SOP-4
<br /> SOP-1 SAMPLE IDENTIFICATION AND CHAIN-
<br /> SOIL BORING SAMPLING OF-CUSTODY PROCEDURES
<br /> During drilling,soil samples for chemical analysis are Sample identification and chain-of-custody procedures
<br /> collected in thin-walled brass lubes,of varying diameters and ensure sample integrity as well as document sample
<br /> lengths(e.g.,4 or 6 inches long by 2 inches outside possession from the time of collection to ultimate disposal.
<br /> diameter). Three or four of the selected lubes,plus a spacer Each sample container submitted for analysis is labeled to
<br /> tube,are set in an 18-inch long split-barrel sampler of the identify the job number,date,time of sample collection,a
<br /> appropriate inside-diameter. sample number unique to the sample,any in-field
<br /> measurements made,sampling methodology,name(s)of on-
<br /> Where possible,the split-barrel sampler is driven its entire site personnel, and any other pertinent field observations
<br /> length either hydraulically or using a 140-pound drop also recorded on the field excavation or boring log.
<br /> hammer. The sampler is extracted from the borehole and the
<br /> brass tubes,containing the soil samples,are removed. Upon Chain-of-custody forms are used to record possession of the
<br /> removal from the sampler,the selected brass tubes are sample from time of collection to arrival at the laboratory,
<br /> either immediately trimmed and capped with aluminum foil or During shipment,the person with custody of the samples will
<br /> "Teflon"sheets and plastic caps or the samples are extruded relinquish them to the next person by signing the chain-cf-
<br /> from the tubes and sealed within other appropriate,cleaned custody form(s)and noting the date and time. The sample-
<br /> sample containers. The samples are then hermetically control officer at the laboratory will verify sample integrity,
<br /> seated,labeled,and refrigerated for delivery,under strict correct preservation,confirm collection in the proper
<br /> chain-of-custody,to the analytical laboratory. These container(s),and ensure adequate volume for analysis.
<br /> procedures minimize the potential for cross-contamination
<br /> and volatilization of volatile organic compounds(VOC)prior if these conditions are met,the samples will be assigned
<br /> to chemical analysis. unique laboratory log numbers for identification throughout
<br /> analysis and reporting. The log numbers will be recorded on
<br /> One soil sample collected at each sampling interval is the chain-of-custody forms and in the legally-required log
<br /> analyzed in the field using either a portable photoionization book maintained in the laboratory. The sample description,
<br /> detector(PID),flame ionization detector,organic vapor date received,client's name,and any other relevant
<br /> analyzer,catalytic gas detector,or an explosimeter. The information will also be recorded.
<br /> purpose of this field analysis is to qualitatively determine the
<br /> presence or absence of hydrocarbons,and the samples to be SOP-5
<br /> analyzed at the laboratory. The soil sample is sealed in LABORATORY ANALYTICAL QUALITY
<br /> either a brass tube,glass jar,or plastic bag to allow for some ASSURANCE AND CONTROL
<br /> volatilization of VOC. The PID is then used to measure the
<br /> concentrations of hydrocarbons within the containers's In addition to routine instrument calibration,replicates,
<br /> headspace. The data is recorded on both field notes and the spikes,blanks,spiked blanks,and certified reference
<br /> boring logs at the depth corresponding to the sampling point. materials are routinely analyzed at method-specific
<br /> frequencies to monitor precision and bias. Additional
<br /> Other soil samples are collected to document the soil and/or components of the laboratory Quality Assurance/Quality
<br /> stratigraphic profile beneath the project site,and estimate the Control program include:
<br /> relative permeability of the subsurface materials. All drilling
<br /> and sampling equipment are either steam cleaned or washed 1. Participation in state and federal laboratory
<br /> in solution and doubly rinsed in deionized water prior to use accreditation/certification programs;
<br /> at each site and between boreholes to minimize the potential
<br /> for cross-contamination. 2. Participation in both U.S.EPA Performance
<br /> Evaluation studies(WS and WP studies)and inter-
<br /> In the event the soil sampled cannot be submitted to the laboratory performance evaluation programs;
<br /> analytical laboratory on the same day they are collected(e.g.,
<br /> due to weekends or holidays),the samples are temporarily 3. Standard operating procedures describing routine
<br /> stored until the first opportunity for submittal either on ice in a and periodic instrument maintenance;
<br /> cooler,such as when in the field,or in a refrigerator at Apex's
<br /> office. 4. "Out-of-Control"/Corrective Action documentation
<br /> procedures;and,
<br /> SOP-3
<br /> SOIL CLASSIFICATION 5. Multi-level review of raw data and client reports.
<br /> Soil samples are classified according to the Unified Soil
<br /> Classification System. Representative portions of the
<br /> samples may be submitted,under strict chain-of-custody,to
<br /> an analytical laboratory for further examination and
<br /> verification of the in-field classification and analysis of soil
<br /> mechanical and/or petrophysical properties. The soil types
<br /> are indicated on logs of either excavations or borings
<br /> together with depths corresponding to the sampling points
<br /> -'-` and other pertinent information.
<br /> t �
<br />
|