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Carolyn Kneiblher From: Amy Terrell [aterrell@waterboards.ca.gov] Sent: Friday, May 13, 2005 1:39 PM To: jenkseb@jtfco.com Cc: Carolyn Kneiblher; John Fortuna; minfurna@phs.hs.co.san-joaquin.ca.us Subject: JTF Stockton Thank you for providing the diagram illustrating the proposed location of the upgradient monitoring well. m As we discussed in our 26 April 2005 phone conversation, due to impending property transactions, the upgradient property is not going to be suitable for either a monitoring well or a grab groundwater investigation at this time. Alternatively, you suggested that the upgradient groundwater investigation be focused on the upgradient boundary of the John Taylor Fertilizer property. In my 12 April conversation with Carolyn, we considered both options of grab groundwater investigation and monitoring well installation. Due to the elevated concentrations of nitrate and pesticides observed in MW -3, I stated that ultimately a monitoring well will be needed along this upgradient boundary. The proposed location of the well as indicated on the diagram transmitted by email on 13 April meets the objectives. Regional Board staff concur with the placement. Please send a hard copy of this diagram to me with copy to San Joaquin County Public Health Services Dept. in advance of your 23 May 2005 drilling date. Amy Terrell >>> <CKneiblher@GeoSyntec.com> 05/13/05 12:57PM >>> Amy, On behalf of John Taylor Fertilizers Co. (JTF), this email provides the subject supplemental plan for the upgradient groundwater investigation described in GeoSyntec's "Response to Request for Work Plan, John Taylor Fertilizers, Co., Inc. Stockton, California Facility" (the "Work Plan") dated 5 October 2004. As described on page 4 of the Work Plan, GeoSyntec proposed submitting to the RWQCB a supplement to the work plan for upgradient investigation, after investigating whether access to upgradient properties could be obtained for the purpose of installing a monitoring well or collecting three grab groundwater samples. As reiterated in your email to Eric Jenks on 3 May 2005, JTF has contacted the current upgradient property owner. However, they were not successful in obtaining access to the upgradient property. In subsequent communications with you and Eric Jenks, we agreed that an upgradient monitoring well can be located on the JTF property, upgradient of well MW -3, and as close to the property fence line as possible. The proposed well location is shown on the attached map. Consistent with the existing wells and the new downgradient wells to be installed, this upgradient well will be drilled and constructed by a licensed drilling company (C-57 license) using hollow stem augers. The total well depth will be determined in the field based on the stratigraphy encountered during drilling, but the well is expected to be about 30 ft deep and will be constructed with 15 ft of slotted well screen. Well construction and development methods will be consistent with the methods proposed to you in our 5 October 2004 work plan. Field work at JTF Stockton is scheduled to begin Monday 23 May. Please contact and Eric and/or me with comments regarding this plan. Thank you,