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V <br /> C <br /> 05 <br /> ENiViROMEWAL HEALTH <br /> ,4,0AWWf 6005 WOMS 43255 wlission Blvd. Suite8 Fremont,CA 94539 (415)651-1906 <br /> N,vember 17, 1986 <br /> 11171cot <br /> AGS Job #8696-1 <br /> Ms. Laurie Cotulla <br /> San Joaquin Local Health District <br /> P.O. Box 2009 <br /> Stockton, California 95201 <br /> Subject: Transmittal of analytical data from contamination <br /> evaluation study, Crystal Cream and Butter Co. , <br /> 404 W. Fremont St. , Stockton, California. <br /> Dear Ms. Cotulla: <br /> Atthe request of RAMCON, acting agent for Crystal: Creamery and <br /> Butter Company, we are submitting this report of the chemical <br /> data obtained during our subsurface study at the above-referenced <br /> Crystal Cream and Butter Company site. This work had been <br /> outlined in our proposal dated October 10, 1986. <br /> Applied GeoSystems was present on site on October 29, 1986 to <br /> perform drilling operations as proposed. Drilling was performed <br /> by Datum Exploration of Pittsburg, California. Two borings were <br /> drilled. The first boring (S-1) was drilled approximately <br /> fifteen feet to the east of the tank excavation, as close to the <br /> excavation as possible given safety limitations created by <br /> overhead power lines. Total depth of the boring was 21.5 feet, <br /> which corresponds to the first sample taken below the ground <br /> water surface. Ground water was encountered at a depth of <br /> approximately 16.3 feet. No subjective evidence of contamination <br /> was noted, and the .boring was backfilled with neat cement. <br /> The, second boring, B-2, was drilled approximately six feet ,;:o the <br /> north of the excavation to a total depth of 38.5 feet, or <br /> approximately 20 feet below the ground water surface. Slight to <br /> moderate odor was noted in samples taken at depths of 15 and 20 <br /> feet. Monitoring well MW-1 was installed in this boring using <br /> two inch inner diameter PVC casing. The well was constructed <br /> .. ... ... . . . with_thread-jointed,- 0.020...in:h.machine-slot-".gid-.casing..between- 37 <br /> and 7 feet, with blank casing to the ground::-surface. No chemical <br /> cements or solvents were used in well construction. The annular <br /> space was filled with sand from total depth to five.feet below <br />