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SAN JOAOtih€COUNTY <br /> ENVIRONMENTAL HEALTH U1`°`11014 <br /> 304 E, Weber Ave.Third F <br /> PO. Box 388, Stockton, CA 95201-0388 <br /> Phone: (209)458.3424 <br /> 4roved <br /> 0 Approved with changes: See Remarks <br /> Disapproved: See Remarks <br /> Remarks P-0-TAc,,T "-Th.5 o t(c dg ZZs ,v rtt vroXcE <br /> [.ATid1N S� <br /> Date 13y MTH <br /> •:yiFO:uAEtilel rECF!:CEGG'Es CO - <br /> Approval of these plans extends only to that — <br /> whi h is shown and described hereon but June 25, 1996 <br /> does not authorize or approve any omission 95-122-01-01 <br /> or deviation of requirements of Mate lavas or Mr.Ron Rowe <br /> Local Ordinances. San Joaquin County Public Health Services <br /> Environmental Health Division <br /> P.O.Box 388 <br /> Stockton,CA 95201-0388 <br /> Subject: Attachment to the Addendum to the"Workplan for Additional Subsurface <br /> Investigation",Fayette Manufacturing Site,7675 West Eleventh 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 soil 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 analysis <br /> soil 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 MW-1,MW-2 and MW-3 for dissolved 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 MW-1, <br /> MW-2 and MW-3 for laboratory analyses for carbon dioxide, alkalinity, nitrate, sulfate, and, <br /> ferrous von in addition to total petroleum hydrocarbons as gasoline, benzene, toluene, <br /> ethylbenzene, xylenes and methyl tertiary butyl ether. Field methods for collecting soil gas <br /> samples and groundwater samples are presented in Attachment 1. <br /> All work described in this addendum will be performed in accordance with Smith <br /> Environmental's Field Procedures and Site Safety Plan on file with PHS/EHD, and will be <br /> performed under the direction of a California Registered Geologist or Professional Engineer. In <br /> addition, soil aeration will be conducted in accordance with San Joaquin Valley Unified Air <br /> Pollution Control District regulations. <br /> 95122uladden2.d- :9 <br /> 1260 Gmphia Drive Modmo•CA 95751-1502 (209)579-Z221 Fac(209)579-2225 <br /> Engineering C—Hing Remediation Con mcfim <br />