|
U. S. Can Company
<br /> 3.1275II;vy. 33, Vernalis, Ciilifornia January 3, 1996
<br /> Preliminary,Site Ch araeterisaikn Rqvorf of Findings Page: 3
<br /> 3.2 Requestet(Analyses
<br /> The sample fiom the,exploratcry trench, LS-1 t:e� 14', was collected for laboratory analysis and
<br /> analyzed using FPA. method 8015 for TEP[i (Total Extractable Petroleum Hydrocarbons) as
<br /> Diesel and Motor Oil, and J'?PA Method 8010/8020 for Halogenated Volatile
<br /> Organics/Arornati.c Volatile Organics(Table 1). The five(5) composite samples, SPA, 2, 3, 4,
<br /> and 5, from the spoils pile, %ere also collected for analysis and analyzed by EPA Method 8015,
<br /> EPA Method 8010!8020, and EPA Method 6010/STLC for Metals (Table 2). Chain of
<br /> Custudy records v ere maintainer at all times (Appendix A).
<br /> 3.3 Analytical Fin (lings
<br /> Contaminants were identified within the exploratory trench as reported by Suniple ES-1
<br /> Q 14' (Table l). 1?S-1 r, 14' tested 8,600 mg/kg Diesel, 3,400 mg/kg Motor Oil, 290
<br /> Lug/kg Benzene, 10,000 paikg Ethylbenze.ne, 5,000 µg/1_g Toluene, 3,600 ,ug/kg
<br /> Xylene, and 320 Fcg/kg Trichloroethene. The waste pit contents tested 120 mg/leg
<br /> Moto' Oil, 7.5 µ?/kg E--thylbenzene, 5.7 Leg/1-- '1TolueE;!�t, 29 �tg/kg Xylene, 19 Icg/kg
<br /> 1,1,1-Trichloroethane., 7.4 mg/kg ArsWnic, 1,300 mgll.f; Barium, 9.7 mg/leg Cadmium,
<br /> 9.1 nig/kg Cobalt, 310 n,-/Ig Caomiunn, 2,800 mg/kg Copt ger, 0.073 mg/kg Mercury,
<br /> 77 jtg/kg Molybdemun, 97 in-Ag Nickel, 8. 100 fng. kg Ltad, and 10 rng/kf;
<br /> Anfi ninny.
<br /> 4.0 Geology
<br /> Vernalis lies in the Central ",la!ley Physiographic Pi-ovince of Calife-i-nia. The Valley is about 40
<br /> miles wide. it is bounded t:: t.lie west by the foothills of t:ha Coast Ranges, and to the east by the
<br /> foothills of the Sierra Nev ida Range;. The Vernalis area is neatly devoid of structural geologic
<br /> Matures.
<br /> The Valley is floored by Quaternary sediments to depths of at least 400 or more
<br /> feet In the Vernalis area. z 11 of these units can be u:onsiclered sods in the engineering sense,
<br /> because they are unconsolidated. Quaturnary sedirnents in the Cuniral Valley were deposited as a
<br /> series of co�rlescing alluvial tans. The tans o6ginatcd where valleys of the major streams which
<br /> drained the Sierra Nevada lunge emptier into the lirvad expanse�, of' the valley. The coarser
<br /> sediments which comprise+ the fans are itnainly arkosii. in composition and were derived from
<br /> erosion associated with glacial stages in the rnmAntains. The fin(:--.r grained sediments are
<br /> predominantly composed of rock flour waslied out eT the fainter extensive glaciers in the Sierras,
<br /> (ArUc:y, 1964).
<br /> i The axis of the Central Valli:y Trwigh was a near'hv, wet area ihrougf,out much of the Pleistocene i
<br /> Epoch. Lacustrine, flood plain and anarshy depositional environnteiits predc,rninated along the
<br /> i
<br />
|