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HORIZON ENVIRONMENTAL INC: -" Specialists in Site Assessment,.Re mod ial'Testing,Deslgn-and Operation October 9,^1997 R F(7o E- 1) 1E :- __ = Mr. Harlin Knoll = - - QCT 0 9 1997 _. - San-Joaquin County Public Health Services - _-- }E'N VIR0,K4M ENTAL HEALTH"? Environmental Health Division PERMIT _ - T 304 EastWeber Avenue,=Third Floor _ - =- _ :P. O Box 3.8$ _ . Stockton;_CA '9.520t-03-88 - - - Vtl. i1REN T t{EALTH DIVISION - -- - - Subject -Soil Management Plan Related-to Und°er �toval - -..� �. Beacon Station.No. 513' --r. Box.388, Stockton CA 95201 0388 _ - O: - ' - 401`West Kettrri lean Lane, Lodi,_Californa ;Approved - - - Denied Conditions[l - 'k - �rt Mr. Knoll-: - - - cam' ;moowry -- Horizon Environmental Inc. (Horizon)j'has "prepared this of anagement Plan in -T- preparation for the planned removal of the'underground storage tanks (USTs), producd nes i - and dispensers-ht the above-referenced site (Figure 1). This plan presents the'procedures for soil sampling, 9yerexcavating, disposing of,-excavated.:soil, and handling of-hydrocarbon =. r - 'impacted groundwater;if encountered: _ - The site currently has _three USTs and two dispenser' islands. Location of the.USTs, dispenser'islands_and other":crtinent. site features are shown on the Site Plan (Figure-2) _ Three -12,000wgallon°_UST's= are used for storage of regular unleaded, plus unleaded an _- - premium unleaded gasoline at the siAll;three USTs-are contained in a common cavity.` - ___ The location of-the product lines is not--shown' on Figure .2, but will be added when: -excavation:has:been col' feted.-The existing UST-s,-dispensers and associated piping-are to - :be removedandreplaced. Horizon's.Field, -and.Procedures used for UST removal are included as an attachment to this soil management plan: _. Previous-Iriv_estigations - - - Ori:June 8,4.993, Remediation Testing Design-conducted asoi�l vapor survey and reported - - July 1,.199.3_-that no.petroleum.hydrocarbons�were detected=in-the shallow soil beneath the - - site.: Dn-`August',.-1993-, - Delta Environmental- Consultants, Inc. (Delta).- conducted.. a subsurface:`investigation which included soif borings and groundwater monitoring well - installations.- Delta reported-that no hydrocarbons were detected any of the borings, except _ the angled boring SB-3 under the west�dispenser-island-.at 26 feet below surface grade(ling). Sample SB 3 `7--indicated .total petroleum.hydrocarbons as gasoline (17 .parts per. billion _ 1. (ppb)), `ethylberizene -(0.32'3 ppb) and xylenes (2.0 ppb). (Delta, November_ 5; 1.993,-` _ Hydrogeologic Investigation.- Beacon Station No. 513,,401 West Kettleman. Lane, Lodi, California'?Delta Project No.. 40-93-942). Delta also reported groundwater._levels at ( _ approximately 68.feet below ground level on September=1993: - 501].Golden Foothill.Parkway,Suite 7 • EI Dorado Hills-CA-95762-e (916)939-2170 • FAX(916)939-2172 . = _ ` - - P.O.Box 5283 •.Bakersfield,CA-93388 (805)589-8389--•'FAX(805)589-1456 -_