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Page 2 of 4 <br /> Brian W. Millman <br /> California Professional Geologist#8574 <br /> Advanced GeoEnviron mental, Inc. <br /> Stockton - Santa Rosa - Monterey • Brea - Spokane - Reno - Dallas <br /> 1-800-511-9300 <br /> bmillman(cr�advgeoenv com <br /> www.advaeoenv.com <br /> This email/fax message is for the sole use of the intended recipient(s)and may contain confidential and privileged information.Any <br /> unauthorized review, use,disclosure or distribution of this email/fax is prohibited. If you are not the intended recipient,please contact <br /> the sender by email/fax and destroy all paper and electronic copies of the original message <br /> From: Vicki McCartney [EH] [ma i Ito:vmcca rtney@sjcehd.com] <br /> Sent: Friday, March 23, 2012 2:26 PM <br /> To: bmillman@advgeoenv.com <br /> Subject: RE: Vapor Intrusion Mitigation System <br /> Brian, <br /> Thank you for responding to my questions and providing me with the indoor air sample results. <br /> Vicki McCartney, Senior REHS <br /> San Joaquin County <br /> Environmental Health Department <br /> 600 East Main Street <br /> Stockton,California 95202 <br /> Phone: (209)468-9852 <br /> Fax: (209)468-3433 <br /> Email: vniccWney c sc..e...hd.com <br /> From: Brian Millman [Mai Ito:bmillman@advgeoenv.coml <br /> Sent: Thursday, March 22, 2012 3:33 PM <br /> To: Vicki McCartney [EH] <br /> Subject: RE: Vapor Intrusion Mitigation System <br /> Vicki, <br /> I am sorry it has taken so long for me to respond, I have been on vacation and then in the <br /> field working. We just received the lab report yesterday for the indoor air samples collected <br /> on 12 and 13 March 2012; the report is attached. The data is mostly favorable. Benzene, <br /> toluene, and xylenes were detected in the living room sample and benzene and toluene <br /> were detected in the bathroom sample. Toluene and xylene were detected below the <br /> indoor air ESL's and benzene was detected above the ESL (but remember the indoor air <br /> ESL for benzene is extremely low, 0.084 ug/m3). However, benzene was detected in the <br /> indoor air samples at concentrations just above the concentrations detected in the ambient <br /> air samples. Benzene was detected in ambient air samples at concentrations between 0.45 <br /> and 0.48 ug/m3 and benzene was detected in indoor air samples at concentrations of 0.57 <br /> and 0.65 ug/m3 <br /> Although the benzene concentrations are above the ESL for benzene in indoor air, the <br /> cancer risk and hazard quotient are not exceeded when using the 0.65 ug/m3 <br /> 3/28/2012 <br />