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Phase II Workplan • • <br /> CLIENT-Stockton,CA <br /> ATC Project No.75.25729.0002 <br /> Page 3, May 16,2001 <br /> Total Petroleum Hydrocarbons-Gasoline(TPH-G;EPA Method 8015); <br /> Semi-Volatile Organic Compounds(SVOCs;EPA Method 8260);and <br /> Pesticides(EPA Method 8080). <br /> A total of ten samples (one per boring) will be analyzed by a laboratory certified by the State of <br /> California Department of Health Services on a 48-hour turn-around basis. <br /> Sample Handling - The sod and/or groundwater samples will be labeled and placed in a cooler for <br /> transportation to a state-certified laboratory for chemical analysis. A chain-of-custody document will be <br /> prepared and accompany the samples to the laboratory. <br /> Decontamination and Site Restoration - Drilling and sampling equipment will be decontaminated between <br /> borings. Drilling equipment will be steam cleaned; sampling equipment will be washed with a solution of <br /> Alconox soap and triple rinsed with the final rinse consisting of de-ionized water. Soil borings will be <br /> grouted with Portland Type II cement grout at the conclusion of sample collection. <br /> Data Management <br /> ATC will perform quality assurance/quality control (QA/QC) checks on the analytical data. This will <br /> include reviewing the results of QA/QC samples submitted for analyses and QA/QC checks performed by <br /> the analytical laboratory. Data qualifiers will be added to the analytical data where necessary. <br /> The data obtained from the chemical analyses will be evaluated to estimate potential impact of petroleum <br /> hydrocarbons, SVOCs, or pesticides to the shallow soil. <br /> Final Closure Report <br /> ATC will submit, upon completion of the subsurface sampling investigation, a final report, which will discuss <br /> and interpret the field program and laboratory analytical results. ATC will evaluate the presence or absence of <br /> on-site chemical contamination and make recommendations,as appropriate. <br /> PROJECT SCHEDULE <br /> Following approval of the Workplan, ATC anticipates beginning the fieldwork on Monday, May 28, 2001. <br /> The fieldwork is estimated to be completed in one day. A final report will be prepared within two days of <br /> receiving the certified analytical reports. <br />