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Harvest-Lathrop Composting Facility - 2 - 7 February 2018 San Joaquin County On 15 September 2017 the Discharger submitted its revised Final Technical Report dated 15 September 2017. On 5 December 2017 eight(8) comments were submitted via email to the Discharger regarding its revised Final Technical Report. On 19 December 2017 the Discharger responded to the 5 December 2017 email stating that a revised Final Technical Report would be submitted no later than 30 January 2018. Upon further discussion with the Discharger on its Final Technical Report and the Discharger's latest submittal of its revised Final Technical Report dated 25 January 2018 (2018 Revised Final Technical Report) Central Valley Water Board staff has deemed the ROWD to be complete on 25 January 2018. 2. SITE DESCRIPTION The existing Facility is located at 916 Frewert Road on 20 acres in San Joaquin County approximately 1.3 miles west of Manthey Road/5 Freeway in City of Lathrop, Assessor Parcel Number 191-260-22. The existing 20-acre Facility has been in operation since 2007 (See Attachment A). Land uses within one mile from perimeter of operation are agricultural, residential and commercial. The Facility is subject to a Solid Waste Facility Permit from the Sacramento County LEA and CalRecycle. The Solid Waste Facility Permit (SWFP) (39-AA-0051) for the facility limits the Facility to 500 tons per day and 156,000 tons (approximately 313,000 cubic yards) of feedstock per year. The upper Quaternary geology in the northern San Joaquin Valley and at this site is controlled by the influx of sediments from the Sierra Nevada Range to the east and the Diablo Range to the west. With the constant flow from rivers out of the Sierra Nevada Range, the sediments of the northern San Joaquin Valley consist mostly of alluvial, paludal, lacustrine and flood basin sedimentation, sands, gravels and cobbles with some clay and silts. San Joaquin County water bearing formations, from the San Joaquin River east to the Sierra Nevada Range, consist of, from the surface down, Basin Deposits, Alluvium and the Victor Formation, Laguna Formation, Mehrten Formation and the Valley Springs Formation. At the site, Basin deposits, most likely derived from flooding of the San Joaquin River and alluvium deposits in a cut and fill environment. Basin Deposits in the area of the site consists of continental unconsolidated gravel and coarse to medium sands deposited along the San Joaquin River. These deposits are porous and good conduits to the lower aquifers of the aforementioned formations and deposits. In all cases, the subaerial deposits consist of silts, clay, sands and gravels with the silts, clays and gravels being more discontinuous lenticular deposit within the formations mentioned. Near the San Joaquin River, peat and clay deposits are not uncommon. Groundwater is at a depth of 9 to 13 feet below existing ground surface (bgs). The groundwater flow is northeast to southwest and calculated to have a velocity of 0.012 feet/day. The closest surface water from the site is San Joaquin River, which is approximately 0.5 miles southwest of the site. Since the site is near the San Joaquin River, fluctuations of the groundwater elevations were considerably low due to recharge from the river. CANNED