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Page 1 of 2 <br /> Vicki McCartney [EH] <br /> From: Vicki McCartney [EH] <br /> Sent: Friday, January 28, 2011 3:18 PM <br /> To: 'Larry' <br /> Cc: 'Dinesh Rao'; 'Yarone (Ron) Madnick' <br /> Subject: RE:Work Plan for Soil Gas Collection <br /> Larry, Dinesh, and Yarone: <br /> I have read the draft Advisory-Active Soil Gas Investigation, and agree to AA&A's amended work plan that <br /> includes the collection of one duplicate soil gas sample in a 250 milliliter Summa canister and the analysis of the <br /> soil gas sample by EPA Method 8260 in an off-site State-certified Environmental laboratory. <br /> If the laboratory is using water-phase standards instead of gas-phase standards for the calibration curve, please <br /> confirm that the laboratory has analyzed a mid-level NIST gas-phase standard (vapor-phase validation check <br /> standard)that includes all of the target analytes and that the percent difference is twenty percent or less, <br /> especially for MTBE. The reporting limits should be less than or equal to the ESLs or CHHSLs for residential land <br /> use. <br /> I hope to issue the permit today for the three soil gas probes. <br /> Vicki McCartney,Senior RENS <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: vmccartnevC)sicelid.com <br /> From: Larry [mailto:larryw@amiadini.com] <br /> Sent: Friday, January 21, 20112:15 PM <br /> To: Vicki McCartney [EH] <br /> Cc: 'Dinesh Rao'; 'Yarone(Ron) Madnick' <br /> Subject: RE: Work Plan for Soil Gas Collection <br /> Vicki, <br /> We would agree to add the following to the Description of the Work in the letter that was provided with the <br /> boring permit application: <br /> Duplicate Sampling <br /> The results of the field work utilizing a mobile laboratory will be independently confirmed through the <br /> collection of one duplicate soil gas sample in a 250 ml Summar canister. This duplicate sample will <br /> be analyzed using EPA Method 8260 in an off-site State-certified Environmental laboratory. The <br /> duplicate sample will be collected in an area where soil gas is suspected to be impacted with VOCs. <br /> We have added this statement to the permit letter, a copy of which is attached. <br /> We trust this will be acceptable. Please let us know should you require anything further. <br /> Sincerely, <br /> 1/28/2011 <br />