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1 f 1 1 <br /> Subsurface Investigation Workplan <br /> Substation,I00 North Valencia Boulevard,Waodlake,California <br /> Page 3 <br /> addition,soil lithology and visual and olfactory observations will be recorded in the field and <br /> used to possibly modify the sample collection interval selection. All soil samples will be field- <br /> screened with a photo ionization device. All fieldwork will be conducted in accordance with the <br /> Apex Standard Operating Procedures included in Appendix B. <br /> Prior to drilling,permits will be obtained from SJCEHD. At least 48 hours prior to drilling, <br /> Underground Service Alert will be contacted to identify buried utilities at or entering the project <br /> site from the public right-of-way. To further avoid striking underground utilities,the first 5 feet <br /> of each boring will be hand-augured. <br /> Upon completion of boring and sampling activities,the borings will be grouted to the surface per <br /> SJCEHD guidelines. <br /> Soil Sample Collection <br /> Soil from all soil borings(B-1 through B-5)will be collected continuously beginning at 5 feet <br /> bgs for logging purposes,and a minimum of three soil samples will be submitted from borings <br /> B-1 through B-4 for chemical analysis. No soil samples will be submitted for chemical analysis <br /> from soil boring B-5. Soil samples collected will be screened in the field for the presence of <br /> petroleum hydrocarbon vapor using a photo ionization detector(PID). Based on soil lithology, <br /> visual observation,and PID readings,additional soil samples may be submitted for chemical <br /> analysis. Fieldwork will be conducted in accordance with the Apex Standard Operating <br /> Procedures included in Appendix B. <br /> Groundwater Sampling <br /> After the soil boring advancement is completed,one discrete groundwater sample will be <br /> collected from direct push soil borings B-2 and B-5. The fresh formation water entering the <br /> boring will be sampled directly from the direct push boring so no purging will be required. <br /> Upon completion of groundwater sampling activities,the borehole will be grouted to the surface <br /> with Portland cement. <br /> Analytical procedures <br /> The soil and groundwater samples will be transported under chain-of-custody(COC) <br /> documentation to a state-certified analytical laboratory for analysis of- <br /> Analysis <br /> f:Anal sis Abbreviation Des l nation USEPA Method No. <br /> Total Petroleum TPH Petroleum <br /> Hydrocarbons as Gasoline g Hydrocarbons <br /> Benzene <br /> Toluene Aromatic Volatile 826DB <br /> Eth benzene BTEX Organics <br /> Xylenes Total <br /> Historical soil analytical results are summarized in Table 1. <br />