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SE\T BN DL)VER 1-9.5 ; 15:27 REST Faxrr 510/603-7902 .k 4/10 I ! analytical Palau stere (basal on knowledge of rocesset,and what may have been released to the env tit), and other pertinent Infor nVion to Phase II camp ' g efforts. assist with the planning stage for WESTON will review any existing reports onhefacility to gala additlooai understanding of the local by logy and potential wurc t areas sad what"vitiea may have bccu previously cond sed In an attempt to idea ' the sources of any releases and potential contaminants of concern. • The WESTON Assessment Team Lcadcr will develop the Phase 11 assessment and complete the ccQrdinafiou with Gulf Coast Libontory, any necessary subcontractors (e.g., drilling ), and equipment requisitio, 1, 30 than the Phase 11 activities will occur the second day_after the initial site visit. GuidaWe for sampling and analytical parameters is in following su ns. • WESTON pemnnel and subcontractors will coinply with the sits epeeifie Health and Safety Pout P) that has been prepared in accordanoe with 29 CPR 1910.120, OSHA Standard for Hizardous Worker Operations ' 29 C VR 1926, General Construction h*stry Stan S. All site persoautel Linder the dirperion of WWTON will follow WESTON's dud operating procedures for safdy and field operations. The Assessment Tun Leader will be responsible for th� completion, review and Iota! approval of the 1ASF. As a general guide of t e magnitude of the Phase II sessme tt, it is assumed that to borings will be drilled at each j acility, with 2 samples coli per br rehole. it 13 also assumed that R minimum of 1 grourA water Sample will be collectem per twitity. I Characterization of in paded Soil and Groandwa WESTON proposes to nstall soil borings at any titw saprce areas identified during the Phase I site inspection q previous investigation reCOM review. ! The soil borings will be drilled using either a geoprobe jail, hydropurA, Or a Kollo stem auger rig to a total depth of 30 feet below surface or 10 feel into bedrock, whichever is the most shallow. This will increase the likelihood that the finrts2tarated interval is encounterW for evaluation of Ste potential impacts to groundwater. The 38 OGW locations will include a of one borehole in each Source arca or presumed downg radlent direction from the source area.; The locations will be identified on a field sketch. Soil samples will be coll uled using the gooprobe 3aml k tube ok split spoon samplers. Samples will be collected at 5-f intervals throughout the length of boring. Each sampled interval will be togged by the Team Leader using the unified scii classi#cition System (USCS). Each sample will be qualitativ fly screened with an organic apor monitor (OVK or photoionization detector(PID)using bea Ispace methods. Bated on the results of field screening, WFSTON will recommend which sampk will be sent to the laborat)ry for apalyses. As a criteria, samples will be submitted to tht laboratory frau the interva exhibltirg the highest measurable PID reading and at the soil-w iter Interface. If there ars no I M readings, soils exhibiting the greatest degree of staining will sampled. This will result a labota4 ry analysis of at least one and Fh n EA-30W 111a4Q�,µ.pw,• ! P+M r