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® Stantec G4'f c- Transmittal <br /> Stantec Consulting Services Inc. <br /> 3017 Kilgore Road Suite 100 f� <br /> Rancho Cordova CA 95670-6150 Or G <br /> Tel: (916) 861-0400 <br /> Fax: (916) 861-0430 <br /> To: Mr. John Yoakum From: Jenni Woodmansee <br /> Company: San Joaquin County EHD ❑ For Your Information <br /> Address: 1868 E Hazelton Ave, <br /> ❑ For Your Approval <br /> Stockton, CA 95205-6232 x For Your Review <br /> Date: May 1,2015 ❑ As Requested <br /> Delivery: FedEx Overnight <br /> Reference: Well 8 Boring Permit Application <br /> Stockton Charter Way Commingled Plume <br /> 440, 441, 508 West Charter Way and 1444 South Lincoln Street <br /> Stockton, California 95206 <br /> Commingled Plume Account No. CP0057 <br /> Dear Mr. Yoakum, <br /> Please find attached eight Well & Boring Permit Applications for the work proposed in the Data Gap <br /> Assessment Work Plan dated July 30, 2014 and the Addendum to Data Gap Assessment Work Plan <br /> dated October 15, 2014, respectively. The respective work plans were approved by the Central <br /> Valley Regional Water Quality Control Board (CVRWQCB) in a letter dated October 30, 2014. The <br /> proposed work includes: <br /> • Installation of 18 groundwater monitoring wells via sonic drilling. <br /> • Destruction of 17 wells via hollow stem auger rig. <br /> • Advancement of 4 soil borings, 2 via direct push and 2 via hand auger. <br /> All wells to be destroyed, with the exception of six wells, will be destroyed via over-drill method. <br /> Wells AMW-10, CMW-2, SMW-5, SMW-6, SMW-13, and SMW-17 are recommended to be pressure <br /> grouted. Wells AMW-10, SMW-5, SMW-6, SMW-13, and SMW-17 are recommended to be pressure <br /> grouted, as current groundwater analytical data shows no COC impacts at these locations. See <br /> attached groundwater tables. Well CMW-2 is recommended to be pressure grouted due to drill rig <br /> accessibility issues. See attached photograph. <br /> Please see attached key information extracted from work plans. <br /> Attachment: <br /> Copies Doc Date Pages Description <br /> 1 10/30/14 2 CVRWQCB Work Plan Addendum Approval Letter <br /> 1 7/30/14 4 Extracted scope of work details from Data Gap Assessment <br /> Deftn with commuMfy in mind <br />