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w � <br /> Harvest-Lathrop Composting Facility - 2 - 27 November 2018 <br /> San Joaquin County <br /> B. PROPOSED CHANGES TO PREVIOUSLY APPROVED NOA <br /> The Discharger proposes the following significant changes to the Technical Report (i.e., <br /> Design Report, Plans, and Specifications) through various submittals and revisions with the <br /> final construction plans, specifications, and Construction Quality Assurance (CQA) plan <br /> documenting the proposed changes submitted on 30 October 2018: <br /> 1. Relocation of Detention Pond #2: The Discharger proposes to relocate Detention <br /> Pond #2 from the approved location along the western edge of the facility to the <br /> southern end of the facility to allow for a potential future expansion of the facility. The <br /> relocation of Detention Pond #2 would also require changes to the associated grading <br /> which directs wastewater from the composting area 'Lo Detention Pond #1 and Detention <br /> Pond #2. <br /> Central Valley Water Board Staff Evaluation and Recommendations: The proposed <br /> relocation of Detention Pond #2 will not change the Discharger's water balance analysis <br /> used to determine the necessary wastewater storage capacity of Detention Pond #1 or <br /> Detention Pond #2. The Discharger intends to build the same storage capacity for <br /> Detention Pond #1 and Detention Pond #2 with the only change being the relocation of <br /> Detention Pond #2 and the grading plans to direct wastewater from the composting <br /> working areas to the detention ponds. Details shown in Attachment 3 for the proposed <br /> containment structures are consistent with the General Order with the exception as <br /> noted in Attachment 3 that the Discharger must ensure that the composting working area <br /> surface contains a barrier layer that is at least 12 inches thick and has a maximum <br /> hydraulic conductivity of 1 x 10-5 cm/sec or less. Approval in a separate letter of the <br /> Discharger's final construction plans, specifications, and Construction Quality Assurance <br /> (CQA) plan that was submitted on 30 October 2018 will reiterate this requirement. <br /> C. TIMELINE FOR COMPLIANCE <br /> The proposed amendment to the 7 February 2018 NOA does not change the time for <br /> compliance detailed in the 7 February 2018 NOA. <br /> D. MONITORING AND REPORTING <br /> The proposed amendment to the 7 February 2018 NOA does not change the monitoring <br /> and reporting requirements detailed in the 7 February 2018 NOA. <br /> E. DISCUSSION <br /> Regional Water Board Staff has reviewed the proposed changes and concurs with the <br /> Discharger that the proposed changes are consistent with and meets the minimum <br /> requirements of the General Order. What is being proposed is an amendment to the NOA <br /> issued on 7 February 2018, and all requirements stipulated in the 7 February 2018 should <br /> remain in force except those specific requirements affected and superseded by this <br /> amendment. <br /> F. RECOMMENDATION <br /> Based on Water Board staff review limited to the proposed changes to the ROWD and <br /> supporting documents, Water Board Staff has determined that Harvest-Lathrop <br />