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APEX ENVIROTECHy INC. STANDARD OPERATING PROCEDURES Quaftrty Monttoring Reports recovered,or the wail is bailed dry When pradmal,the groundwater sample should be collected when the water level in SOp " '4 SAMPLR[ IDtNTII�IOATION AND OHA1N- the well recovers to at least 80 percent of its static level OF-CUSTODY PROOSDURK13 The sampling equipment consists of either a*Teflon*bailer,PVC Sample Identification and chain-of-custody procedures ensure bailer,or stainless steel bladder pump wrth a*Teflon"bladder if sample integrity as well as document sample possession from the the sampling system is dedicated to the well then the baiter is time of collection to ultimate disposal Each sample container usually`Teflon;but the bladder pump Is PVC with a submitted for analysis is labeled to Identify the Job number,date, polypropyieno bladder In general and depending on the Intended time of sample collection,a sample number unique to the sample, laboratory analysis,40-millsider glass volatile organic analysis any In field measurements made,sampling methodology,name(s) (VOA)vsais with'Teflon"septa,are used as sample containers of on-sfte personnel,and any other pertinent field observations also recorded on the field excavation or boring log SOP - 12 IYIRASURINO LIQUID LKViiLLS USINO Chalnrof-custody forms are used to record possession of WATRR LKVSL tl KTKR OR INTSRFAOIQ thosample from time of collection to arrival at the laboratory PRO121 K During shipment the person with custody of the samples will relinquish them to the next person by signing the chain-0f-custody Field equipment used for liquid-level gauging typically Includes the form(s)and noting the data and time The sample-control officer measuring instrument(water-tevel mater or interface probe)and at the laboratory will verity sample Integrity correct preservation, product bailers} The field kit also includes cleaning supplies confirm collection In the proper contatner(s) and ensure adequate volume for analysis (buckets,solution,spray bottles,and deionizod water)to be used In cleaning the equipment between wells If these conditions are met,the samples unit be assigned unique laboratory log numbers for Identification throughout analysts and Prior to measurement the instrument tip is lowered Into the well reporting The log numbers will be recorded on the chain-of- until it touches bottom Using the previously established top-of- custody forms and in the legalty-required log book maintained in casing or top-of box(t a,wellhead vault)point the probe cord(or the laboratpry The sample description,date recelved,client's halyard)Is marked and a measuring tape(graduated In hundredths name,and any other relevant information will also be recorded of a foot)is used to determine the distance between the probe end . SOP - S and the marking on the cord This measurement is then recorded LABORATORY ANALYTICAL QUALIT-V on the liquid-level data shoot as the'Measured Total Depth'of the ASSURANCES AND CONTROL well In addition to routine instrument calibration replicates,spikes When necessary in using the interface probe to measure liquid blanks,spiked blanks,and certified reference materials are levels the probe is first electncaty grounded to either the metal routinely analyzed at method-specrfic frequencies to monitor stove pipe or another metal object nearby When no ground is precision and bias Additional components of the laboratory available,reproducible measurements can be obtained by clipping Quality AssurancelQualdy Control program Include the ground lead to the handle of the interface probe case 1 Participation in state and federal laboratory The probe tip is then lowered into the well and submerged in the accreditation/certification programs groundwater An oscillating(beeping)tone Indicates the probe is in water The probe is slowly raised until either the oscillating tone 2 Participation in both U S EPA Performance Evaluation ceases or becomes a steady tone In either case,this is the studies(WS and WP studies)and Inter-laboratory de th-to-water D performance evaluation programs A (DTW)Indication and the DTW measurement is made accordingly The steady tone indicates floating liquid 3 Standard opombrg procedures describing routine and hydrocarbons(FLH) In this case,the probe is slowly raised until periodic Instrument maintenance, the steady tons ceases This Is the depth to-product(DTP) Indication and the DTP measurement is made accosdingy, 4 "Out-of-Control"lConectivo Action documentation procedures,and, The process of lowering and raising the probe must be repeated several times to ensure accurate measurements The DTW and 5 Mufti-level review of raw data and client reports DTP measurements are recorded on the liquid level data shoot When FLH are indicated by the probes response a product baiter SOP - 7 is towered partially through the FLH water interface to confirm the OROUNDWATKR PURSING AND FLH on the water surface and as further indication of the FLH SAMPLING thickness particularly in cases where the FLH layer Is quite thin This measurement is recorded on the data sheet as'FLH Prior to water sampling each well is purged by evacuating a thickness' minimum of three wetted well-casing volumes of groundwater When required purging will continue until either the in order to avoid cross contaminahon of wells during the liquid- dischargethree wetted well-casing volumes of groundwater level measurement process wells are measured in the order of When required purging will continue until either the discharge 'clean'to'dirty'(where such Information is available) In addition water temperature conductivity or pH stabilize,a maximum of all measuramert equipment is cleaned with solution and ten wetted-casing volumes of groundwater have been thoroughly rinsed with doionized water before use,between measurements in respectrve wells and at the completion of the day's use