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NVIPage 7 Page 8 EN VI I March 24,2020 R March 24,2020 ASSESSMENT, PC Project Number 2020-03-011 ASSESSMENT, PC Project Number 2020-03-011 General Sampling Techniques —Discard gloves,into garbage bag. Garbage bag is non-hazardous waste and may be discarded in Class 3 landfill. The general sampling technique with disposable bailer is as follows: —Decon Pump and piping. —Complete notes and secure well. —Wear protective gloves. —Open the well casing and allow the well to equalize with atmospheric pressure for 10 Record Keeping During Sampling - minutes. —Take a water level reading using a decontaminated well sounder. All water samples and QA/QC samples will be collected in accordance with U.S.Environmental —Purge dome(3)wetted casing volumes with a disposable bailer Three(3)wetted casing volumes in a 2-inch diameter well with 15 feet of wined casing is about 2.5 Protection Agency(EPA)methodology, including the strict use of Chain-of-Custody forms,EPA gallons. procedures,and properly labeled containers. —Follow well purging procedure,complete form attached to this report for pH,electrical conductivity,temperature,and TDS. —Discard the purge water according to Section 5.0 of this SAP. Each sample container will be labeled using the following alphanumeric protocol: —Prepare the appropriate laboratory sample containers with labels and record date,time, —Record weather,water odor,water turbidity,water depth,and any other noteworthy observations. —EA(to indicate Envuo Assessment,PC.) —Fill the laboratory sample container with water from the bailer obtained from the well. —Indicate Monitoring well with number(i.e MW I,MW2) —Label and place samples on ice in ice chest —Six-digit date and time that the water sample was obtained. —Discard gloves,bailer,and fabric string into garbage bag. These items are non- hazardous waste and may be discarded in Class 3 landfill. As an example,if the water sample is obtained from MW-1 on January 15,2020,the individual —Complete notes and secure well. container will be labeled EA MWl 01/15/2011:59am The general sampling technique with submergible pump is as follows: The samples will be immediately labeled and placed into ice chests with ice for=sporta- -Wear protective gloves. tion to the FGL Environmental,located at 2500 Stagecoach Rd,Stockton,CA 95215. —Open the well casing and allow the well to equalize with atmospheric pressure for 10 minutes. QA/QC —Take a water level reading using a decontaminated well sounder. —Purge three(3)wetted casing volumes with a disposable bailer. Three(3)wetted casing volumes in a 2-inch diameter well with 15 feet of wetted cuing is about 2.5 QA/QC procedures will be used to minimize the potential for contamination of ground gallons. —Follow well purging procedure,complete form attached to this report for pH,electrical water samples taken from the monitoring wells. The QA/QC procedures include the use of dis- conductivity,and TDS. posable bailers,decontamination of the sampling pumps before sampling (if needed), changing —Discard the purge water according to Section 5.0 of this SAP. —Prepare the laboratory sample containers with labels and record due,time, latex protective gloves after each sampling event,and recording sample information on chain£- -Record weather,water odor,water turbidity,water depth,and any other noteworthy custody forms before leaving the field observations. —£ill the appropriate laboratory sample container with water from the vessel containing water from the pumped well. Analytical Laboratory QA/QC procedures will be typical ofthose used to meet all state and —Label and place samples on ice in ice chest federal mandates. QA/QC measures in the laboratory setting may include duplicate, spike,and standard reference sample analysis. 6NVIROAS5655L4M,PC GNVatQM1ElJTN, 6IJOPPERPHI GEOLWY ENVIROASSn&S .PC In V cNA¢Nra Wonams1axo-GEOLOGY CORP:POWIXI 4.a0NNERa FERRY.mum PHON2(84q'1CIriI1 PAx(WM6D- 93 C0RP:POB0x1B4.B0M IrERRYm83805 MiONE- & ,142-7311 FAx(M6U.S493