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O� <br />cs007artia <br />Water Boars <br />Central Malley Regional Water Quality Control Beard <br />TO: Stewart W. Black, P.G. <br />Site Cleanup Program Manager <br />JZION, I <br />Original Signed <br />Kyle Cockerham, P.G. <br />Engineering Geologist <br />�OQVy0FESSIp� <br />WHiTTg/V <br />Original Signed and Stamped <br />C0574f31 0 <br />Steven Meeks, P.E. <br />>r <br />Expires 12/31/2019 <br />Senior Water Resource Control Engineer <br />DATE: 25 July 2019 <br />CIVIL <br />_,�/' <br />kOFc <br />GAnN Idiwscibt <br />\f GOW tiNIM <br />J,\ n Br Uut N3 r i it <br />ser c;is infer rlrii <br />fM1:VINl NiAi�iiM t�f+f)ii f: iil"Jf:. <br />SUBJECT: RECOMMENDATION FOR NO FURTHER ACTION, DIESEL TANK <br />FAILURE AND CLEANUP, FOUR K FARMS, 22844 FREDERICK ROAD, <br />RIPON, SAN JOAQUIN COUNTY <br />Issues: On 30 April 2015, an 8,000 -gallon aboveground storage tank (AST) ruptured during <br />filling operations resulting in a catastrophic failure and the release of a proximately <br />6,000 gallons of diesel fuel at 22844 Fredrick Road in Ripon (Site). The diesel flowed <br />into the orchard to the south of the release and down the driveway towards Frederick <br />Road. Subsequent to the release, Four K Farms personnel spread soil along the <br />driveway in an attempt to absorb the diesel and prevent further migration. On behalf of <br />Four K Farms, APEX Envirotech, Inc. (APEX) submitted to Central Valley Regional <br />Water Quality Control Board (Central Valley Water Board) a 13 July 2015 Diesel Tank <br />Failure, Soil Excavation, and Confirmation Soil Sampling Results Report and a 30 May <br />2019 Soil Analytical Results Report for consideration. <br />Rationale: From 4 May 2015 through 11 May 2015, APEX personnel sur ervised the <br />excavation of approximately 1,500 cubic yards of diesel -contaminated soil. The initial <br />extent of the excavation was based on visual indications (staining) anc odors. Additional <br />excavation was conducted based on screening with a hand-held photoionization detector <br />(PID) calibrated for diesel. Post -excavation confirmation soil samples Nere collected and <br />analyzed to confirm that diesel -contaminated soil had been removed to the extent <br />practicable. All excavated soil was stockpiled between two rows of treE!s in the southern <br />portion of the Site. The stockpile was covered during the winter and uncovered during <br />KARL E. LONGLEY SCD, P.E., CHAIR I PATRICK PULUPA, ESQ., EXECUTIVE OFFICE I <br />11020 Sun Center Drive #200, tlanctlo Cordova, CA 55670 1 wv.w.waterhoards.ca.govicantsnlvalley <br />4c,i necyckFo fan£sr <br />