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JUN-25 '96 11:20AM SMITH ENVIRONMENTAL TECH CORP P.2 <br /> June 25, 1996 <br /> 95-123-01-01 <br /> Mr.Ron Rowe <br /> Sari Joa4uin County Public Health Services <br /> Environmental Health Division <br /> P.O. Box 388 <br /> Stockton, CA 93201-0388 <br /> Subject: Attachment to the Addendum to the"Workplan,for Additional.Subsu&ce <br /> investigation", Fayette Manufacturing Site, 7675 West Meve nth Street, Tracy, <br /> California Site Code: 2233 <br /> Mr. Rowe: <br /> Smith Environmental Technologies Corporation, on behalf of Dr. A.R. Glover, is submitting this. <br /> attachment•to the addendum'to the "Workplan for Additional Subsurface Investigation" per our <br /> telephone conversation on June 21, 1996. The.purpose of the additional activities proposed is to <br /> collect and analyze call gas and groundwater samples for biochemical parameters to determine if <br /> bioremediation is occurring at this site. <br /> Smith Environmental proposes to conduct the following activities: submit for laboratory-anaiysis <br /> sail gas samples from each boring for oxygen, carbon dioxide, and methane; conduct field analysis <br /> of grab groundwater samples collected from each boring and groundwater samples collected <br /> quarterly from monitoring wells MtY 1, MW-2 and MW-3 for di salved oxygen and oxidation- <br /> reduction potential, in addition to pH, specific conductance, and temperature; and submit grab <br /> groundwater samples from each boring and groundwater samples collected,quarterly from -1, <br /> MW-2 and MW-3 for laboratory analyses for carbon dioxide, alkalinity, nitrate., sulfate, and <br /> ferrous iron in addition to total petroleum hydrocarbons as gasoline and benzene, toluene, <br /> othylbe:n gno and xylenes. Field methods for collecting soil gas samples and groundwater samples <br /> are preamted in Attachment I_ <br /> All work dasc>;ibe:d in this addendum will be performed in accordance, with Smith <br /> Enviseonmental's Field Procedures and Site Safety Pian on file with PHSIE D, and will be <br /> performed under the direction of a California Registered Geologist or Professional Engineer. In <br /> r4dition, soil aeratlon will be: conducted in accordance with San Joaquin Valley Ua ified Air ' <br /> Pollution Central District regulations. <br /> IMO Gr6pWa Drive • Modesto,Cts 95351-1= (2*979-ZZI1 fox COS}S79-2223 <br /> ftia"FirT - camulting - Aenredifi gar - Construction <br />