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MOHR-FRY Ranches 950 Industrial Drive, Stockton, Calfbrnia June 2, 1993 Phase ll Remedial Report Page: 9 At this time contaminants are perched at the capillary fringe and have not migrated into the water table. Table 2 shows that water samples from monitoring wells MW-1, MW- 2 and MW-3 were "non detect" for all compounds analyzed. The source of Xylene at fifty feet in drill hole MW-1 (Figure 5) is unknown. To determine the source and to investigate the possibility of contaminants from other areas of the site, or possible off- site (from the west), WRF recommends drilling two (2) holes. One should be near the west fence, approximately 65 feet south of MW-1 and 78 feet southwest of MW-3. The second drill hole should be approximately 65 feet south of MW-3 and 70 feet southeast of the first proposed drill hole. ' WHF also proposes to closely examine the surface of the site south of the buildings for any possible surface depressions from excavations to bury or dump possible sources of contaminants. Past uses of the site have been for painting of hardware under a military contract. It is possible that there are other sources of contamination influencing the area of MW-1 and MW-3. IThe above represents our best professional opinion as to environmental conditions at this site. These opinions were derived using data at hand, and using standards of care common to the environmental consulting community in Northern California. Additional work or sampling at this site may generate data that could lead to a change of opinion regarding site conditions or appropriate site remediation procedures, or both. Mid ael J. Klbbeldanz, REA, REHS r; No oz157 California Registered Environmental Assesso 2157 California Registered Environmental Heal peciahst #4783 tx�"� �� P ES r0y9�� '�`OF Ca L00 o 22 339 rn A. Lee DeLano 1b.E. d EXP -30 93 Registration #22339 `req c'v'L OF 4613 Lo s D. Smith, c .ACt ; Certified Prof6isional Geologist #4613 6X'�. GAS 1) SMS,;�- r