SOUR BASE for split-batch fruit sour Recipe

{"RecipeId":83411,"RecipeTypeId":30,"OriginalRecipeId":null,"UnitType":"m","IbuFormula":"t","CreatedBy":120758,"Name":"SOUR BASE for split-batch fruit sour","Description":"Make in a large fermenter, let go for 2 weeks and then split the batch and second ferment with fruit nectar/extract","ImageUrlRoot":null,"StyleId":null,"StyleName":null,"BatchSize":18.9271,"BoilSize":24.6052,"BoilTime":60,"Efficiency":0.72,"DateCreated":"\/Date(1588738004130)\/","BrewSessionCount":0,"MostRecentBrewSession":null,"Og":1.0655006179594613,"Fg":1.0124451174122977,"Srm":3.994619558283532,"Ibu":6.531695391327017,"BgGu":0.099719599521481211,"Abv":6.8441595705841047,"Calories":220,"AverageRating":0,"TastingNoteCount":0,"Fermentables":[{"Per":"10","Amt":"0.454","Ppg":"36","L":"4","Use":"Mash","Id":"443797","IngId":"17","Name":"Vienna - US","CustomName":"","Rank":"2"},{"Per":"10","Amt":"0.454","Ppg":"33","L":"1","Use":"Mash","Id":"443800","IngId":"505","Name":"Carapils - Dextrine Malt - US","CustomName":"","Rank":"4"},{"Per":"80","Amt":"3.6","Ppg":"35","L":"2","Use":"Extract","Id":"443799","IngId":"550","Name":"Liquid Malt Extract - Pilsen - US","CustomName":"","Rank":"6"}],"Hops":[{"Amt":"14","Type":"Pellet","Use":"Boil","Min":"60","Day":"0","AA":"4","Ibu":"6.53169539132702","Id":"469365","IngId":"71","Name":"Hersbrucker ","CustomName":"","Rank":"2"}],"Yeasts":[{"Atten":"0.81","Id":"124204","IngId":"253","Name":"Fermentis Safale US-05","CustomName":"","Rank":"1"}],"Others":[{"Amt":"33","Unit":"ml","Use":"Mash","Id":"82693","IngId":"16","Name":"Lactic Acid","CustomName":"","Rank":"1"}],"MashSteps":[],"Steps":[{"Id":"138943","Rank":"1","Text":"mash carafoam and vienna for 15 minutes at 71 degrees"},{"Id":"138944","Rank":"2","Text":"add food grade lactic acid to achieve PH of 4.0 (about 33ml)"},{"Id":"138945","Rank":"3","Text":"add malt extract and boil for 60 minutes"},{"Id":"138946","Rank":"4","Text":"ferment in \"Bertha\" at 20 degrees until \"final gravity\" is reached"},{"Id":"138947","Rank":"5","Text":"Split between \"Wallace \u0026 Grommit\" add fruit nectar/extract as desired and ferment for two weeks with regular taste tests"}]}