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SRI <br /> September 12,1991 <br /> Texaco Environmental Seg rices Page 3 <br /> -� 62320 1700 <br /> e obtained <br /> Prior to any activities on the subject site,a pernllt for monitoring�gl�ot�et48 hours in advance <br /> from the SJCPHS-EHD. Additionally,Underground Service Alert(USA) <br /> of the start date. <br /> 3.2 SOIL BORINGS using <br /> All soil borings for monitoring wells would bQ�drililedst,�ould supervise the drill nig and continuously <br /> outside dlamster(O.D.)hollow-stem augers. Afield g cg <br /> log the soils encountered In accordance with the Unified Soil Classification System. Soil dgenerated tserlefgt <br /> drilling operations would be <br /> placed on plastic sheeting alts of nd covered. <br /> anafyseS. Local ons of lite proposed <br /> on site for disposal at a later date, pending the <br /> soil borings and monitoring wells are shown on Figure 2(Appendix A). Underground utility information is <br /> not presently available,and will be Included in future red,+ts. <br /> 3.3 SOIL SAMPLING er,lined with three 2-inch <br /> Soil samples would be collected with a 2.5-Inchwould O.D., <br /> be celiac ed atm foot Intervals by drr.ring the <br /> r" diameter by B-inch long brass sample tubes. Sample <br /> samp�er 18 inches ahead of the augers at each sample <br /> olnt. The retained samples would then be 3ottled, <br /> lp <br /> labeled, and placed on Ice In an insulated container for delivery tom analytical <br /> es s���il tl esratory for analyses. <br /> Appropriate chain-of-custody forms would be maintained with the sa p ad In the field, <br /> uct <br /> An initial screening of the soil samples for hydrocarbon constituents <br /> un con)unction wibe th <br /> fie d observations <br /> using a photolonization detector(PiD). PID readings would be u 1 <br /> (I.e.,odors)to select samples for laboratory anaiyces. The soil samples 2s)Id <br /> en j K analyzsd for BTFJt <br /> and TPI -G by Environmental Protection Agency(EPA) methods 5030/60 <br /> 3.4 MONIT0RING WELL CONSTRUCTION <br /> A monitor well will be Installed in each borehole. The monitoring wells <br /> sicrear,and casing,g The <br /> 4-inch diameter,0.020-inch-sI01,schedoula240 2oLapl Lustyl ore sand or rldo(PVC), <br /> the eghfaadutdvelent, and a surfa 6 seal 0f <br /> annular space will be packed whh <br /> bentonite and cement grout. Each wellhead will be prciected by a locking cap and atraffic-rated street box <br /> n and sand <br /> with a water-tight bolted lid(Figure 4,Appendix A)• SpecKlc construction details,such its scree <br /> pack intervals,will be determined in the field based on the depth to first-encountered water. <br /> GROUNDWATER <br /> .�•TECHNOLOGY,INC_ <br /> 170OWKPLRPT <br /> H <br /> IMMEV. -- - - <br />