Laserfiche WebLink
Musco Family Olive Comy - 2 - 29 August 2016 <br /> Pond D <br /> Musco proposes to conduct further assessment of first encountered groundwater in well <br /> MW-35R by installing an additional groundwater well MW-36 and Piezometer PZ-1 in an attempt <br /> to locate groundwater above the current elevation of MW-35R. Musco proposes to install well <br /> MW-36 between Pond C and D, in the southern berm, at a location similar to where well MW-35 <br /> was installed. One to two piezometers are also being proposed to establish triangulation <br /> between the wells and groundwater flow direction beneath Pond D sump. <br /> Recommendations and Conclusions <br /> The DMN for Pond B, C, and D require additional wells to be installed to comply with Title 27. <br /> For Pond B, Musco shall install or deepen wells MW-12, -17, and -22 to eliminate deficiencies of <br /> the DMN and possibly achieve compliance with the WDRs. Staff approves the installation of <br /> replacement lysimeter 36 beneath Pond B. Staff requests the lysimeter be installed to either <br /> five or ten feet below the liner to remain consistent with the rest of the Pond B lysimeters. <br /> For Ponds C, additional wells are also required to eliminate deficiencies of the DMP and to <br /> properly monitor the sump. Musco proposes to install one well MW-34 east of the sump. Staff <br /> agrees with this well placement. Musco proposes to destroy current well MW-34, west of the <br /> sump. Staff recommends this well remain a viable monitoring point which provides triangulation <br /> with wells MW-10R and -34R. Utilizing this well with -10R and -34R will provide groundwater <br /> flow direction across the sump of Pond C. <br /> For Pond D, staff approves the proposed installation of well MW-36--with tentative approval of <br /> one or two piezometers once well MW-36 has been installed. Board staff will be available to <br /> communicate with Musco to review location and depths once the new well boring has been <br /> drilled. <br /> Next Submittal ` <br /> By 30 September 2016 the Discharger shall submit an addendum to the work plan proposing to <br /> reconstruct wells MW-12, -17, and -22, agree to maintain well MW-34 once well MW-34R has <br /> been installed, and agree to install lysimeter 36 to a depth of five or 10 feet bgs. Staff approves <br /> the proposed procedures to install wells and lysimeters. . <br /> Musco shall submit a well installation report that includes the required information described in <br /> the Well Installation Report guidelines (attached) by 30 December 2016. Musco shall continue <br /> to collect groundwater samples semi-annually and incorporate new wells into the monitoring and <br /> reporting program. <br /> If you have any questions please contact me directly at 916-464-4737 or by email at <br /> tdelfrate@waterboards.ca.gov. <br /> TODD A. DEL FRATE, P.G. 7394 <br /> Engineering Geologist <br /> WDR Compliance and Enforcement <br /> Enclosure: Monitoring Well Installation Work Plan and Monitoring Well Installation Report <br /> Guidelines <br /> cc: Robert McClullen, San Joaquin County Environmental Health <br />