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P2020.001.886 <br />Albertsons Companies September 2, 2020 <br />Fuel Center, Safeway #55, Shopping Center, Mountain House Revised September 3, 2020 <br />PROPOSAL FOR A LIMITED SOIL AND GROUNDWATER ASSESSMENT Page 2 <br />• Two temporary wells will be installed for groundwater collection and properly developed. We <br />will return a minimum of 48 hours later to sample and properly abandon the wells. <br />Groundwater samples will be collected using a pump with dedicated tubing for each location, <br />and then placed in laboratory -provided containers. The well will be purged a minimum of <br />3 casing volumes prior to sampling. <br />After samples are completed, a label will be placed on the sample including a unique sample <br />number, sample location, time/date collected, laboratory analysis, and the sampler's <br />identification. The samples (up to 14 soil and 2 groundwater samples) will be placed in an <br />ice -cooled chest and submitted under documented chain -of -custody to a State -certified <br />laboratory. The laboratory will be instructed to analyze on a standard 5 -business -day <br />laboratory turnaround time. The proposed laboratory analyses for soil and groundwater <br />samples are as follows: <br />o Fuel oxygenates (EPA Method 8260B) <br />o BTEX compounds (EPA Method 8260B) <br />o Total Petroleum Hydrocarbons (TPH) as gasoline (EPA Method 8260B) <br />o TPH-diesel and TPH-motor oil (EPA Method 801513) <br />o Polycyclic Aromatic Hydrocarbons (EPA Method 8270) <br />A soil samples will be collected at depth of 3 feet from each environmental boring. An <br />additional sample will be collected if a high PID reading is encountered, or at the water table <br />interface or bottom of boring, whichever is encountered first. Figure 1 shows the proposed <br />sampling locations. <br />• The borings will be filled with grout upon completion of sampling, in accordance with County <br />requirements. <br />ENGEO will obtain two drilling permits from San Joaquin County, one for environmental <br />borings and one for geotechnical borings. <br />=2012-21111112-242—i Til <br />After compiling and reviewing the collected data, we will prepare a written report. The report will <br />document the services performed and the findings of the assessment. <br />We will complete the draft report for review within 3 to 4 weeks of receiving the laboratory data. <br />We will provide you with updates and keep you informed of our findings and recommendations <br />throughout the project. <br />FEE <br />We propose to perform the above-described services on a time -and -expense basis in accordance <br />with our current fee schedule as summarized below. <br />