APTIM 5725 NW 159th Street Miami Lakes, 33014 www.APTIM.com

April 30, 2019

Florida Department of Environmental Protection Industrial Wastewater Permitting, Southeast District 3301 Gun Club Road, MSC 7210-1 West Palm Beach, Florida 33406

Subject: NPDES Generic Permit – Best Management Practices and Monitoring Plan Dewatering for Underground Storage Tank, Canopy Footer, and Sanitary Sewer and Exfiltration Trench Installation Activities Wawa Store No. 5362 2505 West Woolbright Road Boynton Beach, Palm Beach County, Florida 33426

To Whom It May Concern:

Aptim Environmental and Infrastructure, LLC. (APTIM), on behalf of Wawa Florida, LLC. (Wawa), is submitting this Best Management Practices (BMPs) Plan to the Florida Department of Environmental Protection (FDEP) for the above referenced facility in order to meet the requirements for coverage under the Generic Permit For Discharge Of Ground Water From Dewatering Operations, DEP Document 62- 621.300(2)(a), effective February 2015 (Generic Permit). APTIM has authorization to request permits on behalf of Wawa. The Limited Authorization Letter is included as Attachment A. The requested permit should be issued to: Mr. Mark Hamilton Real Estate Manager 7022 TPC Drive, Suite 200 Orlando, Florida 32822 [email protected]

Background The Subject Property is identified as Parcel ID Numbers 08-43-45-32-00-000-3080 and 08-43-45-32-00- 000-3050 on the Palm Beach County Property Appraiser website. The facility lies within Section 32 of Township 45 South and Range 43 East, at latitude 26º 30’ 49.20” N and longitude 80º 05’ 22.90” W. An Aerial Site Location Map is included as Figure 1.

Wawa is planning to develop the site, owned by BW Woolbright Congress, LLC., in July 2019. Depending on the water table elevation at the time of site development, it is anticipated dewatering will be needed during the installation of the underground storage tanks (USTs), fuel dispenser sumps, product piping, canopy footers, and sanitary sewer and exfiltration trench installations, as shown on Figure 1. A National Florida Department of Environmental Protection April 30, 2019 Page 2

Pollutant Discharge Elimination System (NPDES) Permit is required for the discharge of groundwater from the dewatering operation(s) during the development of the site. Dewatering is expected to occur within 90 days of receipt of all required permits and will last for up to approximately 10 consecutive days for the installation of the USTs, up to approximately 20 consecutive days for the installation of the fuel dispenser sumps, product piping, and canopy footers, and up to approximately 10 consecutive days for the sanitary sewer and exfiltration trench installations. The total days of dewatering are not anticipated to exceed 40 non-consecutive days. The dewatering operation will be online for 24 hours per day, per dewatering event. The groundwater will be discharged to the Palm Beach County storm drain located on West Woolbright Road, as shown on Figure 1. An alternate discharge location would be the Palm Beach County storm drain located on South Congress Avenue (Figure 1).

Contaminated Sites within 500 Feet or Induced Influence Area The subject property has no documented discharges; however, there are two facilities with open discharges located within 500 ft of the subject site. The site location with a 500 ft radius is shown on Figure 2 and information for the sites is summarized in the following table:

FDEP Distance from Contaminant Contaminated Site Facility ID Dewatering Location to Type No. Contaminated Plume Marathon Woolbright #613 1610 South Congress Avenue, 50/9502819 Petroleum 230 ft Palm Beach County 7-Eleven Store No. 34790 2605 SW 15th Avenue, 50/8520561 Petroleum 355 ft Palm Beach County

• Marathon Woolbright #613 (FDEP Facility No. 50/9502819) is located at 1610 South Congress Avenue, Boynton Beach, Florida. The facility has one open discharge. The Discharge Reporting Form (DRF), dated December 21, 1998, was filed based on contaminated groundwater discovered via monitoring well sampling. The Discharge was eligible for funding by the Florida Department of Environmental Protection (FDEP) Petroleum Restoration Program and received a site score of 30. The 1998 DRF and the most recent groundwater analytical data are included in Attachment B. • 7-Eleven Store No. 34790 (FDEP Facility No. 50/8520561) is located at 2605 SW 15th Avenue, Boynton Beach, Florida. The facility has five closed discharges and two open discharges. A DRF was filed December 15, 1988, following the detection of petroleum contaminants in monitoring wells. The 1988 discharge was granted No Further Action (NFA) approval on August 12, 1991. An October 30, 1995, DRF was filed following the discovery of petroleum contaminants in compliance wells. The discharge was granted NFA status on July 1, 1996. A DRF was filed on January 25, 1996 due to the detection of petroleum contaminants in monitoring wells. This discharge was eligible for funding by the Florida Petroleum Liability and Restoration Insurance Program (FPLRIP). On April 1, 1997, a DRF was filed following the discovery of used oil in a Florida Department of Environmental Protection April 30, 2019 Page 3

compliance monitoring well. The discharge was eligible for funding by FPLRIP. On November 5, 2001, a DRF was filed following a gasoline spill. The discharge was granted NFA status on August 14, 2002. A DRF was filed on August 20, 2003 following another gasoline spill. The discharge was granted an SRCO on October 8, 2007. On April 21, 2007, a DRF was filed following the detection of petroleum contaminants via soil sampling. The discharge was granted an SRCO on July 15, 2010. The 1988, 1995, 1996, 1997, 2001, 2003, and 2007 Discharge Reporting Forms and applicable discharge closure documents are included in Attachment B. The most recent groundwater analytical data was included in a Remedial Action Interim Report written by Groundwater & Environmental Services, Inc. (GES), in September 2018. The report concluded that petroleum contamination across the site was below the respective Groundwater Cleanup Target Levels (GCTLs) in all monitoring wells for two consecutive quarters. Therefore, GES recommended that a Site Rehabilitation Completion Order (SRCO) be issued for the open 1996 discharge. The groundwater analytical data from the 2018 Remedial Action Interim Report is included in Attachment B.

As calculated on Table 1a, 1b, and 1c using Sichardt’s equation, Marathon Woolbright #613 is located within the equivalent radius of influence (ROI) for short-term dewatering for UST installation activities (513.7 ft), the product piping, dispenser sump, and canopy footer installation activities (188.9 ft), and the sanitary sewer and exfiltration trench installation activities (151.6 ft). Therefore, APTIM performed groundwater monitoring using Analytic Aquifer Simulator (AnAqSim) to evaluate the effect of dewatering for the UST, product piping, dispenser sump, canopy footer, and sanitary sewer and exfiltration trench installations on the Marathon Woolbright #613 site. The most recent groundwater analytical data for 7- Eleven Store No. 34790 concluded that the petroleum contamination across the site was below the respective GCTLs, therefore, 7-Eleven Store No. 34790 was not considered in the groundwater model.

Groundwater Modeling Software Information APTIM selected AnAqSim groundwater modeling program as this program is well respected in the industry and from regulatory agencies. AnAqSim was created by Fitts Geosolutions, LLC as an analytic element software designed to simulate groundwater flow under various conditions, including in steady state or in a transient condition. The software can be used in a two-dimensional model that can also stack domains to create a three-dimensional model. It is meant to be a robust yet simplistic model that allows evaluation for injection or extraction functions in an unconfined or confined aquifer. APTIM believes this model is a good fit to evaluate the impact of short term dewatering on adjacent sites without performing a rigorous modeling effort using more complex finite element methods software. Documentation on AnAqSim is attached in Attachment C and additional information can be located on the website: http://www.fittsgeosolutions.com/.

Groundwater Modeling Results The base map for groundwater modeling of this site used the ACAD drawing developed for site construction by the respective engineer/architect, which was converted to a .dxf version for modeling purposes. Specific aquifer characteristics used in the AnAqSim model were taken from assessment/remedial reports developed for the subject site and nearby sites since a complete Florida Department of Environmental Protection April 30, 2019 Page 4

assessment has not been performed at the subject site. The model was executed to simulate current static conditions with the estimated gradient, flow direction, and the groundwater elevation set to an arbitrary vertical datum. The model was then executed using a set constant elevation head in the proposed UST area to simulate tank installation dewatering for a period of 10 days for the tank pit, 20 days for the product piping, dispenser sumps, and canopy footers, and 10 days for the sanitary sewer and exfiltration trench installations.

Based on the model results, the Marathon Woolbright #613 site is within the area of groundwater depression created by dewatering at the subject site. APTIM inserted particle tracking at Marathon Woolbright #613 in the contaminant source area to evaluate induced contaminant migration. Results from the AnAqSim modeling predicted no significant contaminant migration at the Marathon Woolbright #613 site for a 10 day estimated potential dewatering period for the UST area, a 20 day period for the product piping, dispenser sumps, and canopy footers, and a 10 day period for the sanitary sewer and exfiltration trench installations. Based on the modeling results, dewatering will not entrain contamination from the nearby impacted sites or significantly exacerbate contaminate migration. Therefore, APTIM requests that this facility be excluded from dewatering effluent treatment. Results of the AnAqSim modeling are presented in Attachment C.

Dewatering Setup The UST contractor will install well points as a means of dewatering in order to depress the water table and provide a safe and “dry” environment for the construction activities. The well points are typically installed on three sides of the excavation to allow access for excavation equipment. The well points are typically constructed of 15 feet of solid two inch diameter polyvinyl chloride (PVC) riser threaded to three feet of slotted PVC screen. For the fuel dispenser sumps, product piping, and sanitary sewer and exfiltration excavations, the well points will be reused and installed to a depth to draw down the water table to approximately eight feet below land surface. A header pipe will connect the well points to an eight inch vacuum pump (or equivalent) that will then discharge into the storm drain via a lay-flat hose. A dewatering flow rate of 1194 gallons per minute (gpm) is anticipated for the UST installation (Table 1a), 984 gpm for the installation of the dispenser sumps, piping, and canopy footers (Table 1b), and 420 gpm for the sanitary sewer and exfiltration trench installations (Table 1c). If a significant rain event is encountered at the site during construction, then the dewatering activities will cease and will continue once the storm has passed.

Best Management Practices and Monitoring Plan The use of a well point system typically reduces the effluent turbidity to less than 29 Nephelometric Turbidity Units (NTUs). Prior to discharge into the storm drain, additional turbidity control measures will be utilized if the well point system alone does not keep turbidity below 29 NTUs. In that circumstance, due to limited available space during construction activities, APTIM would utilize a sediment tank and, if necessary, a non-cationic flocculant to remain in compliance with the Generic Permit. The manufacturer information sheet for the flocculant will be kept onsite along with the permit, if utilized to reduce turbidity. Florida Department of Environmental Protection April 30, 2019 Page 5

For each day of dewatering, APTIM or the tank contractor will collect twice daily turbidity readings, at least four hours apart, to confirm turbidity is kept below 29 NTUs. The samples will be collected at the discharge location. A log of daily turbidity measurements will be kept onsite for the duration of dewatering activities along with daily measurements of the flow rate in gallons per day.

APTIM, on behalf of Wawa, requests that this facility be issued a NPDES permit. All dewatering activities will be conducted under Sections 403.087 and 403.0885, Florida Statues and Chapter 62-4, 62-620, 621 and 62-660, as established in the Florida Administrative Code. If you have any questions regarding this BMPs Plan or the permit application, please contact me at (813) 612-3607 or [email protected] or Nathan Miller at (813) 612-3642 or [email protected].

Sincerely,

Meghan Harbaugh Scientist II

Attachments: Table Figures Attachment A - Limited Authorization Letter Attachment B – Historical Reports Attachment C - AnAqSim Information and Model Results

PROFESSIONAL CERTIFICATION

PROFESSIONAL ENGINEER LICENSED IN THE STATE OF FLORIDA

BEST MANAGEMENT PRACTICES AND MONITORING PLAN DEWATERING FOR UNDERGROUND STORAGE TANK, CANOPY FOOTER, AND SANITARY SEWER AND EXFILTRATION TRENCH INSTALLATION ACTIVITIES

For

Wawa Store No. 5362 2505 West Woolbright Road Boynton Beach, Palm Beach County, Florida

In accordance with the provisions of Florida Statutes, Chapter 471, this Best Management Practices and Monitoring Plan for Wawa Store No. 5362 located in Boynton Beach, Palm Beach County, Florida has been prepared under the direct supervision of a Professional Engineer registered in the State of Florida. I have completed and/or been in responsible charge of work completed by a qualified engineer/scientist working directly under my supervision. This work was performed in accordance with generally accepted professional engineering practices pursuant to Chapter 471 of the Florida Statutes, and other applicable rules and regulations of the state of Florida. The data, findings, recommendations, specifications or professional opinions were prepared solely for the use of the Florida Department of Environmental Protection.

Aptim Environmental & Infrastructure, Inc., (Certificate of Authorization Number 9317) is authorized under the provisions of Section 471.023, Florida Statutes, to offer engineering services to the public through a Professional Engineer, duly licensed under Chapter 471, Florida Statutes.

This document has been electronically signed and sealed by Adam J. Blackford, P.E., on April 30, 2019 using a SHA-1 authentication code.

Printed copies of this document are not considered signed and sealed and the SHA-1 authentication code must be verified on any electronic copies. TABLES TABLE 1a - Proposed Dewatering for UST Installation

Facility Name: Wawa Store No. 5362 Facility Address: 2050 West Woolbright Road, Boynton Beach, Florida FDEP ID: N/A

b in feet drop in ft H=total head of aquifer 205 14 H= 62.5 m h=total head of dewatered aquifer 191 h= 58.2 m K in ft/day K=hydraulic conductivity 38.016 Ro = Radius of Influence K= 0.0001 m/s Re = Equivalent Radius of Influence Ro in feet Ro + Re in Feet Ro=3000(H-h)sqrtK L in ft W in ft 486.4 513.7 Ro= 148.3 m 87 27 a b Re=radius of influence (equivalent) 26.5 8.2 Re= 8.3 m

# well points q= 0.001507768 m^3 / sec 50

q= 23.9 gpm per well point

Total Pump Rate 1194 (gpm) 1,719,579 (gpd) Total Pump Amounts 10 days = 17,195,790 20 days = 34,391,580

NOTE: Please see enclosed the Broward County Environmental Protection Department Exhibit III: Calculation Methods for Radius of Influence and Dewatering Flow Rate from Aquifer Test Data TABLE 1b - Proposed Dewatering for Product Piping, Dispenser Sumps, and Canopy Footer Installations

Facility Name: Wawa Store No. 5362 Facility Address: 2505 West Woolbright Road, Boynton Beach, Florida 33426 FDEP ID: N/A

b in feet drop in ft H=total head of aquifer 205 4 H= 62.5 m h=total head of dewatered aquifer 201 h= 61.3 m K in ft/day K=hydraulic conductivity 38.016 Ro = Radius of Influence K= 0.0001 m/s Re = Equivalent Radius of Influence Ro in feet Ro + Re in Feet Ro=3000(H-h)sqrtK L in ft W in ft 139.0 188.9 Ro= 42.4 m 90 87 a b Re=radius of influence (equivalent) 27.4 26.5 Re= 15.2 m

# well points q= 0.001241851 m^3 / sec 50

q= 19.7 gpm per well point

Total Pump Rate 984 (gpm) 1,416,306 (gpd) Total Pump Amounts 10 days = 14,163,059 20 days = 28,326,119

NOTE: Please see enclosed the Broward County Environmental Protection Department Exhibit III: Calculation Methods for Radius of Influence and Dewatering Flow Rate from Aquifer Test Data TABLE 1c - Proposed Dewatering for Sanitary Sewer and Exfiltration Trench Installations

Facility Name: Wawa Store No. 5362 Facility Address: 2505 West Woolbright Road, Boynton Beach, Florida 33426 FDEP ID: N/A

b in feet drop in ft H=total head of aquifer 205 4 H= 62.5 m h=total head of dewatered aquifer 201 h= 61.3 m K in ft/day K=hydraulic conductivity 38.016 Ro = Radius of Influence K= 0.0001 m/s Re = Equivalent Radius of Influence Ro in feet Ro + Re in Feet Ro=3000(H-h)sqrtK L in ft W in ft 139.0 151.6 Ro= 42.4 m 100 5 a b Re=radius of influence (equivalent) 30.5 1.5 Re= 3.8 m

# well points q= 0.000529881 m^3 / sec 50

q= 8.4 gpm per well point

Total Pump Rate 420 (gpm) 604,318 (gpd) Total Pump Amounts 10 days = 6,043,182 20 days = 12,086,363

NOTE: Please see enclosed the Broward County Environmental Protection Department Exhibit III: Calculation Methods for Radius of Influence and Dewatering Flow Rate from Aquifer Test Data Environmental Protection and Growth Management Department POLLUTION PREVENTION, REMEDIATION AND AIR QUALITY DIVISION One North University Drive, Suite 203, Plantation, Florida 33324 954-519-1260 • FAX 954-765-4804 EXHIBIT III

CALCULATION METHODS FOR RADIUS OF INFLUENCE AND DEWATERING FLOW RATE FROM AQUIFER TEST DATA

Radius of Influence

The most accurate method of estimating Radius of Influence (Ro) is to perform an aquifer test at the same flow rate at which dewatering will occur; however, an aquifer test conducted at such a high flow rate may itself cause a contaminant plume to migrate. Therefore, the dewatering flow rate required to achieve the necessary drawdown and the associated value of Ro must be estimated from an empirical relationship developed by Sichardt (Powers, 1992). Using values of hydraulic conductivity calculated directly from a site-specific aquifer test or from the EAR aquifer test database (see SOP Section II.C.1.), the Ro for an unconfined aquifer can be readily calculated using the following equation:

RHhKo =−3000()

where Ro and (H - h) are in meters and K is in meters per second (m/s). Note that in calculating hydraulic conductivity (K) from aquifer test data, the Division utilizes the base of the Biscayne Aquifer as depicted in Figure A-11 of SFWMD’s A Three Dimensional Finite Difference Groundwater Flow Model of the Surficial Aquifer System, Broward County, Florida (1992), as the saturated thickness (H). When Ro from Sichardt’s equation is added to the effective radius of the wellpoint configuration, and if the resulting value is less than the distance of the dewatering perimeter to the edge of the nearest contaminant plume, then it is reasonable to assume that the proposed dewatering will not cause the contaminant plume to migrate. If the resulting value is greater than the distance to the nearest contaminant plume, then further information is required for approval. The Dewatering Plan may be modified to include further hydraulic control, and analysis may be performed using a three-dimensional computer model.

Dewatering Flow Rate

A direct calculation of flow rate may be derived from the following equation: ⋅ qn hH 22 =− − rR )ln(ln π ⋅ k eo where n = the number of wellpoints, q = flow rate per wellpoint in m3/sec, re = effective radius of dewatering in m, H = the total head of the water table aquifer in m, h = the total head of the dewatered aquifer in m, Ro = radius of influence in m, calculated via Sichardt’s equation, and k = hydraulic conductivity, in m/s

This equation is particularly useful to determine not only the total flow rate from all points (the value nq) but also the flow rate from each point (q). To correctly calculate Ro, equations generally assume that water is withdrawn from a circular area. Most dewatering activities, however, are from rectangular areas. Therefore, an equivalent radius of influence (re) must be calculated to make rectangular projects applicable:

Broward County Board of County Commissioners Sue Gunzburger • Kristin D. Jacobs • Albert C. Jones • Ken Keechl • Ilene Lieberman • Stacy Ritter • John E. Rodstrom, Jr. • Diana Wasserman-Rubin • Lois Wexler www.broward.org Broward County Dewatering SOP Exhibit III Page 2 of 2

b

ab re re = a π

Example:

Dewatering is required at a site in Broward County where Figure A-11 of SFWMD’s report indicates a total saturated aquifer thickness of 150ft (45.7m). The closest contaminant plume is identified at 1000ft (304.8m) away. It is proposed to depress the water table 15ft (4.6m) to excavate an area 100 feet (30.5m) long by 50 feet (15.2m) wide. The groundwater table is to be lowered to the base of the excavation using a pattern of wells along the rectangular perimeter. A total of 26 wells, each connected to the pumping system, are to be used. The hydraulic conductivity of the aquifer is 100ft/day (3.528 x 10-4m/s).

From Sichardt’s equation, the resulting radius of influence would be: h = 45.7m – 4.6m = 41.1m

Rmmxms=−3000() 457... 411 3528 10 −4 /

Rmfto ==259 850

To calculate the effective radius of the dewatering wellpoint configuration:

()()305..mm 15 2 r = e π rmft==121. 40 e . When added to Ro, the total radius of influence is 890ft from the center of the dewatered area. Because the radius of influence is less than 1000ft (the distance to the nearest contaminant plume), the dewatering plan may be submitted to the Division for approval. And using

22nq Hh−=()lnRroe − ln , πk nq ()()45..7mm22−=411 ()()ln ()259mm−ln( 12.1 π()3./528xms 10−4

m3 ft 3 gal nq ==0144.,, 439 313 = 2 282 s d min

For n = 26 (i.e., 26 wells), the pump rate per well must be: ft 3 439, 313 ft 3 gal q ===d 16,. 397 87 8 26 d min

Broward County Board of County Commissioners Sue Gunzburger • Kristin D. Jacobs • Albert C. Jones • Ken Keechl • Ilene Lieberman • Stacy Ritter • John E. Rodstrom, Jr. • Diana Wasserman-Rubin • Lois Wexler www.broward.org FIGURES ADA-COMPLIANT RAMP BUILT MAX. 1:12 SLOPE

APTIM ENVIRONMENTAL & INFRASTRUCTURE, INC. 5725 NW 159th STREET MIAMI LAKES, FLORIDA 33014 (305) 818-1888 office (305) 231-7403 fax

SITE LOCATION MAP

1 APTIM ENVIRONMENTAL & INFRASTRUCTURE, INC. 5725 NW 159th STREET MIAMI LAKES, FLORIDA 33014 (305) 818-1888 office (305) 231-7403 fax

SITE VICINITY MAP

2 ATTACHMENT A

Limited Authorization Letter

ATTACHMENT B

Historical Reports

12/21/98 16:47 FAX 561 &8707 HANDEX/HF? *-- PBC DERM 2~003/003

INCORPORATED Received From: Date Reported : Dec18 1998

Handex -Delray Beach Project Number : Amnoco#60990 2170 W. Atlantic Ave. PO Number :117755-75 Delray Beach, FL 33444 FDHRSDW Number : 83139 NYSDOH N~umuber :11595 FDER COZ4QAPNum, 86-0008G LDHH Number :94-23 NCDEHNR Number :296 SCDHEC Number 96019 For: 602 Date Sampled:Decll. 1998 Date Received:Decl4 1998 Lab Numbers: 11645-11649 REPORT OF ANALYSIS 11645 11646 11647 11648 11649 Parameter Unit M!ethod %ACC %PRC EQBLK TWP1 TWP2 TWP3 TWP4 Detection Limit 1.00 DilutionFactor - - - 1.00 1.00 1.00 1.00

o-dichlorobenzene ug/L 0.500 101. 6.44 <0.500 <0.500 <0.500 <0.500 <0.500

m-dichlorobenzene ug/L 0.500 104. 6.15 <0.500 <0.500 <0.500 <0.500 <0.500

Para-dichlorobenzene ug/L 0.500 109. 5.91 <0.500 <0.500 <0.500 <0.500 <0.500 Benzene ug/L 0.200 106. 1.15 <0.200 <0.200 <0.200 22 chlorobenzene ug/L 0.500 112. 2.33 <0.500 e-0-S00 <0.500 <0-500 <0.500 Ethylbenzene ug/L 0.500 100. 5.51 <0.500 <0.500 <0.500 36.9 <0.500

Toluene ugfL 0.500 104. 2.11 <0.500 <0.500 <0.500 81.2 <0.500 Xylene ug/L 0.500 95.8 3.46 <0.500 <0.500 <0.500 225. <0.500

Methyl-tert-butyleth ugiL 0.500 93.5 2.10 <0.500 7.46 <0.500 <0.500 7.50 Total_.BTEX ugfL 0.500 99.5 3.16 <0.500 <0.500 <0.500 346. 3.10

PID~_Spike ugIL 0.500 91.6 .100 88.1 89.1 89.2 93.2 89.2

Data Release Authorization Sample inteqrity cert~jfj, QriQr tQ analysia.Defi.ci.encies are in OA Rpnnrt~ Spr~ a ➔➔➔ 14]002/002 HANDEX/HFP PBC DERM 12/21/98 -·-17:38 FAX 56

1KETCH O Copy to Project file �---====--='c::::>oc=-� DATE \\ ( S{ ,i Page _ of _\ _ _ \ . ���-��ml /y;' \lo\O &u� G,�tr1:ss. Are¥..� Client\ Fa.cili_,ty�__o _· c_c:i_C._b_q_ct_O__ _ � X-STREETS______.,.._

0 • . 0 l • . . • 6 ft . . a 10 10 . 12 ,. 1• 14 - 18 7 l.), 20 . ":'(� 22 :I< . I• 115 ::'6 :, . . � ):, ,lo l2 . . n .,. ,.. :16 . . ,,; :I,! ,. •

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Scale: 0 :: 2 feet PhO!IXOPYenl:!rgcnient: 10 1"=10' X 139%; 10 1"=20' X 69% •• Department of Environmental Regulation tJ@li\Il~l\tTh) Discharge Notification Form • DEC ?.'1 l9B8 litlll• ol e.,,1.,.,mentat Rt.1, Form 17-1.218(3) ., ~tllll 1,.1\fA llllAtli ,..____,,1. i#' .',\'J,•• ..... ,.t.f ·~•. Use this form to no•ify the I.Jepartmcnt of Environmental Regulation of: 1. Results. of tank tening which reveal e discharge within 3 working days of te:.ting. 2. Discharge, °'ceeding 100 gallons on pervious surface, 11 de,cribed in Section 17·61.05(41(bl within 3 working days of discovery. 3. Positive response of• detection device, monitoring well ten of 11mple or laboratory report within 3 working days of discovery. Mail to the DER District Office in your district. PLEASE PRINT OR TYPE Put "X" where answer is unknown.

1. facility Nurnt..er: X :2'. Tank Number: _....;.X'------3. Date: _____,1'-'2'"'--1=5_-,,,B,,,B'--_ 4. Facility Name: __M_o_b_j _)_O_j _)_S_G_._r_V_l_· C_G_S_l_a_l_l_·o_n_#~0_2_-_A_J_,_5 ______Facility Operator:------Fac,lityAddrm: 2605 S.W. 15 AVG., Boynton Beach, FL Telephone Number: l 3 o5 l 776- 82 OO County: __f_'a_l_m_R_c_a_c_h ___ _ MailingAc1dress: 6363 N,W, 61b Way, Sui1C 390 Fort Lauderdale, rr. 33309 6. Due of ten or discoverv:-----~1=2--~~~~------monlh/day/year 6. Method of initial di,covery. (circle Ont' _pJ!1y) A. Automatic detector in ground, monitoring . D. Emptying 1nd inspection. well, or containment. E. tnventory control. fl. NF PA 3i9 1e11 (underground tanks only!. f. Odor or visible signs at facility or in vicinity. () Manual tes.t of monitoring we11(5). G. Other: ------<••Plainl 7. fstimeted number ot 9allon1 lost: _____U_N_K_N_O_W_N ______

8. What part of the storage system h leaking? (circle all that apply) A. Dispemer B. Pipe C. Fitting D. T1mk @-_;lnknown 9. If a tank is leaking, circle the choices which ducribe the type. A. Aboveground D. Underground H. Sacrificial anode tvPC' 8. Factory welded l. Bare or asphalt-coated steel I. lmpreued current type C. F ielo erected f. Fiberglm-clad ,teel J. Double walled G. Fiberglass (!!:,Yther or Unknown 10. lype of pollutant discharged. (circle onel A. leaded Gasoline. E. Aviation fuel. BLIHF./\U OI W/\S'I E C;LEP,NUI'. B. Unleaded gasoline. Y. Other C. Gasohol or alcohol-enriched gasoline. (!}Unknown Office Pl~plainl 11. Cause of tea~. (circle all that apply) !'iP.i!lll JJ~ B. Split G. Split J. Installation failure C. loose connection H. Couo$ion P. Other------D. Other------I. Puncture n. 10 lHl (l[S1 OF MY KNOWLlOGE ANO BELl£F ALL INFOltMAllO CUf!AlE, AND COMPLEH.

1,_.1. Holder. Nernc of Owner, Operator

KEEP A COPY OF THIS FORM FOR YOUR RECORDS. cc: C. r.. Po arson Fllc DC R FORM 11-1.-'ll(l} il/11'( (1,n) Florida Department of Environmental• Regulation 1\vin 'Jbwcrs Office Bldg. • 2600 Blair Stone Road • Tallahassee, Florida 32399-2400

taw1on Chiles, Go\'c:rnor Carol M Browner, Secretary

August 12, 1991 <\)\, Mr. Douglas J. Cobb 0 Mobil Oil corporation 2170 West state Road 434, Suite 104 Longwood, FL 32779 5c/ 1/J Dear Mr. Cobb: The Department has reviewed the Contamination Assessment Report (CAR) and No Further Action Proposal (NFAP) dated June 1991, submitted for the Service Station #02-AL5 site located at 2605 SW 15th Avenue, Boynton Beach, Florida. Documentation submitted with the NFAP confirms that criteria set forth in Section 17-770,630(3), Florida Administrative Code (F,A.C,), have been met. The NFAP is hereby incorporated by reference in this Order. Therefore, you are released from any further obligation to conduct site rehabilitation at the subject site, except as set forth below. If a subsequent discharge of petroleum or petroleum product occurs at the site, the Department may require site rehabilitation in order to reduce contaminant concentrations to the levels approved through review of the NFAP or otherwise allowed by Chapter 17-770, F.A.C. Additionally, you are required to properly abandon all monitoring wells except compliance wells requlred by Chapter 17-761, F.A.C. for release detection. The wells must be abandoned in accordance with the requirements of Section 17-532,500(4), F,A,C. Persons whose substantial interests are affected by this Site Rehabilitation completion Order have a right, pursuant to Section 120,57, Florida statutes (F.S.), to petition for an adminis­ trative determination (hearing). The Petition must conform to the requirements of Chapters 17-103 and 28-5 1 F.A.c., and must be filed (received) with the Department's Office of General Counsel, 2600 Blair Stone Road, Tallahassee, Florida 32399-2400, within twenty-one (21) days of receipt of this notice. Failure'to file a petition within the twenty-one (21) days constitutes a waiver of any right such persons have to an administrative determination (hearing) pursuant to Section 120,57, F.S. This Site Rehabilitation Completion Order is final and effective on the date of receipt of this Order unless a petition is filed in accordance with the preceding paragraph. Upon the timely filing of the petition, this Order will not be effective until further order of the Department. Mr. Cobb • • Page 2

When the Order is final, any party to the Order has the right to seek judicial review of the Order pursuant to Section 120.68, F.s., by filing of a Notice of Appeal pursuant to Rule 9.110, Florida Rules of Appellate Procedure, with the clerk of the Department in the Office of General counsel, 2600 Blair Stone Road, Tallahassee, Florida 32399- 2400; and by filing a copy of the Notice of Appeal, accompanied by the applicable filing fees, with the appropriate District Court of Appeal. The Notice of Appeal must be filed within thirty (30) days from the date the Final Order is filed with the clerk of the Department. The DER Facility Number for this site is 508520561. Please use this identification on all future correspondence with the Department. Any questions you may have on the technical aspects of this Approval Order should be directed to Rafael Romero at (407) 355-4011, Contact with the above named person does not constitute a petition for administrative determination. Sincerely, /))f)/]~j,f, J~~~uddell, 00.rector Division of Waste Management JMR:JAV:RR:kle cc: Palm Beach County Dept. of Environmental Resources Management DER File #50-6508 ,l• .Jl1olWtll&Di, 11•0,awaotau»_,.,...,,.,,_,, • \~ . • ,_. m ■ __ .__..._.._ • ...... _ , Discharge Reporting

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Pleue Print o, 1\1le - flnlew lnatrvctlon• lelo,a Co111pl1Un11 l'orm ,i,,/ ,sl'i5'

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-~----1 4. • II the undlrlllndng d the llclty owntdopnlOr 1h11 IPPfopriale doll "-bNll lllan lO IIINl lhe l'elrolll#II lnll#~f , "-Pollllba) ~ JllllllllttoChllpltr 17.Ja f'lolldlAd,111,•-~ Cod& lhertfor& the flc:!lly--.,IIOr ..... ,lffltda.. fie lllbftc:I dtclllrOt In the lolooofng IIIIMII lcheGk->= · ~'nit~ wll p,oceed wW1 clNnup end tHk ~ lqr flttollllon COIIS purwanl to Cl!lpce, 17.na, PAC. The ata1►eellnlnl11ered oleanup opt1o111 .,. ofllr -11.ie unlll °"'"'"' 11, an The - 1111 com,ilellcl 1111 8111d lullne1a/Colporlllon.NIII lot Prall! CfrUllcldlon, DIA Form 117-71... 00(1), IIICI; Ow11 p,OCNC1 wilh lnllllf rlffltdll action and'""~ WIiien Mllcll lO lllle-edminlllered dtl,-,p;. D wll lNII IIIIIHdffllnllltrlcl c:IN/IUp; o~Ow11 clNnup lie•~ to Chlpl9 t7-77Q. F.A.C, IIICI INII no~ d rnordon. COIi&,

(Chaolr Aft Appllc■bl1 lou1) ' s. l&l0llchlrol 1epol10d wllhln 24 "°"''°DEA Clllllcl Office or comacled courq rtplNtnlalh& '° AUach oon of DIICharve 11epor11n11 l'orm u, ::u Jxll'elloleum IIOrlOt ~ 11111d o, ernpdld wllhln 3 dlyl d dlChargt cite~ · ~~ R rr, ~LNldng pe1ra1eu111 IIOlaOt ..-,., ,..-ci r,orn Nnllol MIiiin a dlyl inl • hn been repaired~ ~8 liJeteenup HMCel rtlllnld wilhln a dlyl d diachorOO ~ ~ '.::': ~ ;u < fvl 0... --- . fT' )'M Frff producl ,_,,-lnilllllcl within 3 cla)'I d dlaeha,oe 6-ry. =r r:--? 2 1b lhe bell d mr knawl9dga and blllal o1 lnlorlllOliaft ll,lbfflilltd on Ha form is IMI. _,,... Ind .... ~ARfii~ ~~~ j}6L,. a:/v/1£ Nffll& -.or " / . ·. liii,iiiuri · 11 ...... Jl_rJl(}rlt, J•F.TIH)l,f.Vt! I.JJlflXUlY IW:OIJI1,MICJ. MIO J.l(S_TORAlIQ!f_J•RQGJIAH_C.OlH'llt,Hr.._( C!l[.i:_r:us1 (1ft 1 1 0.f\11 DA![_ ll/7 ('/>' , DES facility•. S()fr~ JfJ~ (,/ ,,.1,fty """"· Mo/'.11 ,10;, · 11, s- r,d1 Hy Add,,,,. '}l{,b-S :,n /j fl. /lvC· ~tff~-ifkk,T,t-,;) f;c,,/,J /L•,.; /f(fl<·/1 r--1/1. (onlact l'er!>on/lC'lc-plionC' //t,[1·( {::'i1Allh•S/~/ iN :.,('cVI /,?,Irl(,c.,,,,/ (103) 3'/1· ,>bJJ latiturJr,_/f,'_?(!'//(~· lonuilud('Jf;'c,• (i) 'l-:/' .;-l/J1- '717~/~'f\(

0 For tf,c ll£'u,s !:ic-lc,...- that n,,1y irnJicalc• non-con,p11ance or gro~s negliger1cC', r1rasc P>tplain in detail .in'd provi de sur,rort ir,g docurc1pnl,;1t ion.

I. I 1. \.las· .ir,:, conlarnina~io.n d. isc. over eel' prior .lo January _! 1989.? If yes.. , expl;d9. /c:-/foj,J PN> . Ml fl() ;:,:,ud 8 l.b/'7_1 17lrJ f!/.'>f/_lf'?~~-,t (A/t(;1 .. ,. (hf,rb(;A.,t'd ,-vi'/h Y-1Le- j.0 t41..,r(1.-kr di,et--/r.,id,;,

1>r I. I. s•,·tro1,•un1 llabilily lnsurar,ce Program Aff~avil forn, completed? If yes, give date ,,otadHd.. · (,f,1>/'.111'( ✓ ·/:I ,:{a.l <

I. I ,:v{ Js the site insured by rPLll"A7° If not, supply the carrier insured with, or otf1er l)'f•C- cd financio'l1 responsibility mechanism used. {:(¥/', . /•1o/S/i OJR/'e>t?/1 ,-;,-,,J (iu/}(?l/1\17(',:. (COF(z II< (,-,,.,,,y) '/.(3,,/'ft.

,:,{ 1: I I. l~­ f.:estorr1lion (ov('rag~ ):'.ol~c} of Eligibility issuC'd? If yes, give effedive dc1te. . 'f(?1;4!J- fl,,n-1/IA.N{ _ (, , ,,,_,,,,.. -.•;✓,,,.,, ., 1, 1o ,,-- .-- -:-,-; J/1 h c_....,,.,...-

✓i I. (,. }lits a Stor,119e l,rnk Program compliance inspc'clion c-ver been performed for this faci1 i ly? J f ye/s give _U1e cfate of the r11os/ rC'unt ·insJieclion a~d .!ivroly? c_ori~- IP 1/1!.- . I. ,:-,/ ,. H,n the !>l!Spec tt-d petroleum storage systen1 coniponenl responsible for the disch,1r9E' been r(•n,oved fron, Hrviu wiUdn 3 days/f discovery. _,,)(no.explain._ Z,{!(> 11Y/-,,t>/4✓,.. 71,}r /:-,if jX'.-'f/(,,-n,t ,/ .s,,nit/,.., i.( <1/h1 t! /rP/4{, · .

I. 1:v( [,. llavC' stC'ps to o6tain clC'anup sr,r..,ices 1'C',E'n initiated within :3 days of the discharge diHovr-ry? Jf n._o, rx~ytin.~ /.VO /{/ 'f(l-r <,;

9. I~ thr-rr- C'vid(•nce of .a conl;in,inalion probler11? lf yes, £')(plain in con"1•C'nt section.

Jf ·vc~ lo 9, chccl {ir1r:

I. I ii. h,0 c,r n,ore n,onilodng wr11s/boreliolr,s sliow >2" frE'r, prOduct.

,:,( !:,. Only 1 ri,onitoring well shows >2" frer fH~duct or nioniloring w~l_ls sho.(-1 _'<7" free product or pt'.'ttoleun, sheen. c

{l[f.! rorn, tlo. f'agc l of ? Date

1_1 c. Monitoring wells are contaminated but contain no free product (vapor? only). . ' ,_, d. Soil contamination and/or recent product loss.

10. Contamination Product Type 1_1 a. Light petroleum (kerosene, gasoline, aviation fuel, etc:i' .' ··

1_1 b. Heavy petroleum (fuel oil, diesel or similar petroleum products) I~ c. Un!cnown·:or .other. ·Y~ t) ✓-/·._.

Che ex th !U.L..t.h.a_l__aQpb..:. S>k /~ ~I . 11. Potable water . €6(1}1'/e t-1,,t/S/7 . I_I •- a. Within 1/2 mile: large wells >100,000 gpd /J. ·...I..~_ /), • - 1. r nd i ca te di rec u on: ______,_,/cJ=fy-1-' -'--"-11~ 10r/_,_l.::;..i.Vi~""'"'½_-~il...::,,:W:;..<-1.:....:! c~(M~'ic::::....'.I~_ 2. Es u mate distance=-,------·-.__ ·_· -. ___ 5,,:c·_,lf,q.._ "-l,#C!C...::..:.3/.,£--!l"'--~~~L~s_

b. ~ithin 1/4 mile: small wells <100,000 gpd •··I. Indicate direct.ion: ______2. _ Estimate distance:-,------'-----

1_1 c. Surface water body used as. a public water system. 1- ~. :~. . ". . ·., ..

0 12. Indi.cate belo; p~o~imit_y to popul~tion_;:enters: (restaurant, shopping center, ho_u~e_. __ ~=c.)__ . __ ,.·.• _ , '". .c~~~lf :~~l,,.) ~ {frPT~./Co,J()DS) ---1~ a.··~ 500 feet: Indicate dista~ce: [ 500 feet: Estimate distance: Soo' S~v-?11{js,4r1x.) Soo'01t57_ (iYJNr

Please indicate how the Ptti 5 ¼rdL

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DER District: ______(or) local Program: ______

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,· Discharge Report Form 0EPF.,,.1i1 O:MJ mu PCIOII. n. pi,,Jc llFPPf! 11'•!"'1 PLJtASE PRINT OR 1YP.E e&o:i,._. Dmc ..,,.,.. ,.,,, .i,\9,0L. __ _

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3. Gent:ral W.fc,rmartoa Facility llllllO or re•pousible party (if ,pplicable):.,,M'f07B";l'::L-:021~L-';C,.,O"cR-::P-:-".1c-.1 ;,,19 73;-;,------""-=-.Y..­ Facility Ow!Jer or OperO!Dr, or Discharger. ExxonMobil Site 11 9 0 • LS Contact Perso~ OAP.GE MARA@LINe T•lephonc Number. ( 561 l 737-4881 County: ~!!!.!.!.....,..,,,,,_ .....c..- Facility or OiscJarse.r Mailins Addms: 2605 SW 15TH AVE. BOYNTON BEACH, FL 33436-6602 7 location ofDiscbora• (sueet oddreuJ: 2sos SW 15TH AYE BOYNTON BEACH Fl 3343B-56Q2 L>btude and Lonciltlde ot Disclms• (iflalowu) I alil11de· 25-30-47 QQQQ · I ongitude· BQ·QS·2Z QQQQ

4. n.. ,~ ut receipt of test resqlt, or S. Estimated number ot gallobt discovery or cunlirmod disobarge: ..:ec.:,2:;c0:;:./O.:c3:::.... ____,,.moNn1hidaytyur disdlarged: Undetermined

6. Oisdi•fll• affected: [ ] Air [ ] Soil [-'I GrnUlldw:iter I I Drinl:inc water .,.ll(s) [ ) I I Surface waL!r (water body Shor

7. Mclhud uf d;.c..very (cbc

8. Type or rogul ■t■ d ,.,.t,,;unce discharged: (cbe<:lc one) l l Uola,c,wn I l Used/.,..te oil I I Jet fuel I I He.mos oil I I New/lube: oil [,] Gasoline I I Aviatioll sas I J Die.el I I Kero,enc [ I Mineral .,id [ ] Ha=dous subst:lQce • il>clude• Cl!RCLA substanoes from UST, above rcJ)(>Nblc qwmtilie., p"51icidcs, ammonia. chlorine, :md derivatives (write in name or Chemical Abstroct Service (CAS) nu,nbor,______I I Othor ______

9. Source oCDiRh ■ rge: (choclc all that sp~ly) [,] Tltspcn,ing •Y•Lcm I l Pipe . r I Bats• I I Vipelioe [ J Vehicle r I r ..k I J Fitting I I T'1lllJanc I I Valve failure [ ] OL\,cr Vc,,cl Tunic Lruck Ir IJ Other Unkoown______I J I I Drum

10. c.... of the discharge: (cbeci:: ill 111,11 •pply) l I Loose connectiou I l Pu.Dctuze I I Spill I I Collision I I Corrosion I I f'irei•Xplosion [ J Ovt..,-r.u I ] Humon enor [,] Vehielo Aocideut I J lni:ta!Jarion r.;1u,e { ] Other______

ll. Action, taken in rospo.,.. Ill the dw:harge: IPT dispatched Wayne/Dresser to the site to perform clean yp actjyities along with Handmc fnyironmental to perform an assessment on the extent of the discharge All fuel remaining on the concrete surface v.:as contaiped and cleaned YP using absorbent material. A fygl(watar mixture was id9otified in the catch basin West of the

12. Commcnb: Groundwater GADditions will be determined in a follow~up assessment The fuel/water mixt11ce to1md in the catch hac:in was cnmpletel:y p11mped out via vao:tn,ck to be m:operl)' disposed off site

13. Ag•nciel notified (as applicable): {,) Srate Waruws Point { ] Nation•! Rc,pon'"' Ccn1er I I Florido Morine Patrol [ ] Fire Dop:ir!DleUt. I I Dl:!J> (dimicVper..,o) 1-800 320-0519 I-800-414-8802 (100) 341-S167 [,] County Tanks Program

14. To the bcir or my kaowl•dge and belief, •D inform>tion submitted Ob this Corm is true, accurate, an~ Ian A. Ellis /4,:;; 6 / !'rioted Name of Own,,r, Opcr.,.tor or Autbmzed Represencative, Sig,,aaw of Owner, ei:.,..,OT OT A~d R..pmcnlAtivc, ·or Oicchargcr or Dis:c.ha.rser ., ... Charlie Crist Florida Department of Governor Jeff Kottkamp Environmental Protection Lt. Governor Bob Martinez Center 2600 Blair Stone Road Michael W. Sole Tallahassee, Florida 32399-2400 Secretary

October 8, 2007

CERTIFIED MAIL #7007 0710 0002 4701 1021 RETURN RECEIPT REQUESTED

Mr. Michael Meola. ExxonMobil Oil Corporation 5224 West State Road 46, Suite 339 Sanford, FL 32771-9230

Subject: Site Rehabilitation Completion Order Mobil R/S #11193 2605 SW 15th Avenue Boynton Beach, Palm Beach County FDEP Facility ID# 508520561 Discharge Date: 08/2()/()3 (Nori-program)

Dear Mr. Meola:

The Palm Beach County Department of Environmental Resources Management (ERM), on behalf of the Florida Department of Environmental Protection (FDEP), has reviewed the Site Assessment Report (SAR) and No Further Action Proposal (NFAP) dated September 4, 2007 (received September 5, 2007), prepared and submitted by Handex Consulting and Remediation, LLC for the petroleum product discharge referenced above. All the documents submitted to date are adequate to meet the site assessment requirements of Rule 62-770.600, Florida Administrative Code (F.A.C.). In addition, documentation submitted with the SAR/NFAP confirms that criteria set forth in Subsection 62-770.680(1 ), F.A.C., have been met. The SAR/NFAP is hereby incorporated by reference in this Site Rehabilitation Completion Order (SACO). Therefore, you are released from any further obligation to conduct site rehabilitation at the facility for petroleum product contamination associated with the discharge referenced above, except as set forth below.

In the event concentrations of petroleum products' contaminants of concern increase above the levels approved in this Order, or if a subsequent discharge of petroleum or petroleum product occurs at the facility, the Department may require site rehabilitation to reduce concentrations of petroleum products' contaminants of concern to the levels approved in the SAR/NFAP or otherwise allowed by Chapter 62-770, F.A.C.

Legal Issues

The Department's Order shall become final unless a timely petition for an administrative hearing is filed under Sections 120.569 and 120.57, Florida Statutes (F.S.), within 21 days of receipt of this Order. The procedures for petitioning for an administrative hearing are set forth below. ·

"More Protection, Less Process" www.dep.state.fl.us/waste/categories/pcp/default.htm

LP SRCO/508520561 03-07-07 Mr. Michael Meola FDEP Facility ID# 508520561 October 8, 2007 Page two

Persons affected by this Order have the following options:

(A) If you choose to accept the Department's decision regarding the SAR/NFAP you . do not have to do anything. This Order is final and effective as of the date on the top of the first page of this Order.

(B) If you choose to challenge the decision, you may do the following:

(1) File a request for an extension of time to file a petition for an administrative hearing with the Department's Agency Clerk in the Office of General Counsel within 21 days of receipt of this Order; such a request should be made if you wish to meet with the Department in an attempt to informally resolve any disputes without first filing a petition for an administrative hearing; or

(2) File a petition for an administrative hearing with the Department's Agency Clerk in the Office of General Counsel within 21 days ·of receipt of this Order.

Please be advised that mediation of this decision pursuant to Section 120.573, F.S., is not available.

How to Request an Extension of Time to File a Petition for an Administrative Hearing

For good cause shown, pursuant to Subsection 62-110.106(4), F.A.C., the Department may grant a request for an extension of time to file a petition for an administrative hearing. Such a request must be filed (received) by the Department's Agency Clerk in the Office of General Counsel at 3900 Commonwealth Boulevard, Mail Station 35, Tallahassee, Florida, 32399-3000, within 21 days of receipt of this Order. Petitioner, if different from ExxonMobil Oil Corporation, shall mail a copy of the request to ExxonMobil Oil Corporation at the time of filing. Timely filing a request for an extension of time tolls the time period within which a petition for an admihistrative hearing must be made.

How to File a Petition for an Administrative Hearing

A person whose substantial interests are affected by this Order may petition for an administrative hearing under Sections 120.569 and 120.57, F.S. The petition must contain the information set forth below and must be filed (received) by the Department's Agency Clerk in the Office of General Counsel at 3900 Commonwealth Boulevard, Mail Station 35, Tallahassee, Florida, 32399-3000, within 21 days of receipt of this Order. Petitioner, if different from · ExxonMobil Oil Corporation, shall mail a copy of the petition to ExxonMobil Oil Corporation at the time of filing. Failure to file a petition within this time period shall waive the right of anyone who may request an administrative hearing under Sections 120.569 and 120.57, F.S.

Pursuant to Subsection 120.569(2), F.S. and Rule 28-106.201_, F.A.C., a petition for an administrative hearing shall contain the following information:

(a) The name, address, and telephone nuniber of each petitioner; the name, address, and telephone number of the petitioner's representative, if any; the facility owner's

LP SRCQ 03-07-07 Mr. Michael Meola FDEP Facility ID# 508520561 October 8, 2007 Page three

name and address, if different from the petitioner; the FDEP facility number, and the name and address of the facility; (b) A statement of when and how each petitioner received notice of the Departme·nt's action or proposed action; (c) An explanation of how each petitioner's substantial interests are or will be affected by the Department's action or proposed action; (d) A statement of the disputed issues of material fact, or a statement that there are · no disputed facts; (e) A statement of the ultimate facts alleged, including a statement of the specific facts the petitioner contends warrant reversal or modification of the Department's action or proposed action; (f) A statement of the specific rules or statutes the petitioner contends require reversal or modification of the Department's action or proposed·action; a_nd (g) A statement of the relief sought by the petitioner, stating precisely the action petitioner wishes the Department to take with respect to the Department's action or proposed action.

This Order is final and effective as of the date on the top of the first page of this Order. Timely filing a petition for an administrative hearing postpones the date this Order takes effect until the Department issues either a final order pursuant to an administrative hearing or an Order Responding to Supplemental Information provided to the Department pursuant to meetings with the Department.

Judicial Review

Any party to this Order has the right to seek judicial review of it under Section 120.68, F.S., by filing a notice of appeal under Rule 9.11 O of the Florida Rules of Appellate Procedure with the Department's Agency Clerk in the Office of General Counsel at 3900 Commonwealth Boulevard, Mail Station 35, Tallahassee, Florida, 32399-3000, and by filing a copy of the notice of appeal accompanied by the applicable filing fees with the appropriate district court of appeal. The notice of appeal must be filed within 30 days after this Order is filed with the Department's clerk (see below).

Questions

Any questions regarding ERM's review of your SAR/NFAP should be directed to Steve Rial, P.G. at (561) 233-2502. Questions regarding legal issues should be referred to the Department's Office of General Counsel at (850) 245-2242. Contact with any of the above does not constitute a petition for an administrative hearing or a request for an extension of time to file a petition for an administrative hearing.

LPSRCO 03-07-07 Mr. Michael Meola FDEP Facility ID# 508520561 October 8, 2007 Page four

The FDEP Facility Number for this facility is 508520561. Please use this identification on all future correspondence with the Department or ERM. ·

MEA/sar cc: Joe Lurix, FDEP Southeast District Office Steve Rial, Palm Beach County ERM Basith Mohammed, Handex Consulting and Remediation, LLC, 430 South Congress Avenue, Suite 1 D, Delray Beach, FL 33445 File

FILING AND ACKNOWLEDGMENT FILED, on this date, pursuant to· §120.52 Florida Statutes, with the designated Department Clerk, receipt of which is hereby acknowledged.

(or Deputy Clerk)

LPSRCO 03-07-07 P.G. CERTIFICATION

Site Assessment Report/No Further Action Proposal for Mobil R/S #11193, located at 2605 SW 15th Avenue, Boynton Beach, FDEP Facility ID# 508520561.

I hereby certify that in my professional judgment, the components of this Site Assessment Report/No.Further Action Proposal prepared for the 08/20/03 petroleum discharge satisfy the -requirements set forth in Chapter 62-770, Florida Administrative Code (F.A.C.), and that the monitor wells and analytical parameters specified in this plan provide reasonable assurance of verification of site conditions while achieving the objectives stated in Chapter 62-770, F.A.C., for remediation by natural attenuation.

I personally completed this review.

✓ This review was conducted by Steve Rial working under my direct supervision.

David C. G,ibsoli, P.G. Professional Geologist 0000409 Resources Protection Division Palm Beach County Department of Environmental Resources Management

September 21, 2007 Date ,-

rev 10/14/02 Discharge R.ep~rt Form DEPForm# 52-76) !lQOCI) F'res,~ Form llUe Djscimp Report Fam> L0'1\lS ...,..- PLEASE PRINT ORTYPE Em:<:t\wDate: hdy..,.1_3 =®=•--- WF-2 -e- ,______,::::>'" __ ~ Instructions are on the reverse side. Please complete all applicable blanks DA"le- J::::::::" LAt.r V t. Facility ID N~mber(if registerod): ___5 ____08=5=2=056=· .-"-"'-1 ______2. Date of form completion._·6~/'"""20~/~07 ______

3. General information O· RI G I N A L Facility name or responsible party (if applicable):-"'M,,.O!.!,B...,IL.,_#n;.1.w1u1.>t.93:,(...U{Qtk,2w:-A;,oL.,.5"-}------~~ Facility Owner oi Operator, or Discharger: , MOBIL OIL CORPORATION . Contact Person: MICHAEL F, MEOLA . Telephone.Number: ( 407 ) 282-7762 ~: ~P_._A...,,L...,M.LB=E-A'""C...,H...,__ __ Facility or Discharger Mailing Address: 5224 STATE ROAD 46 (#339), SANFORD. FL 32771-9230 Location ofDischarge (street address): 2065 SW 15th AVENUE, BOYNTON BEACH~ FL 33436 Latitude and Longitude ofDi~(ifknownl'J------'---'---·-----~------

4. Date of receipt or test results or . 5. Estimated number of gallons discovery of confirmed discharge: ...,4"-'/2=-"1:.:..;/0,,_,7____ monthlday/year discharged: UNKNOWN·

r--> 6. Discharge affected: I .] Air [,1] Soil ( J Groundwater l J Drinking water well(s) [ ] I. J SUrfa~-~~ (~body} :,'>J Shoreline name) •/_ i::,:, • ' 2: · ·_: .. S. t~ 7. Method of discovery .(check all that apply) . .:< ::::_ :·; : I ..:_ :.:; t"YI l J Liquid detector (automatic or manual).· ( } lnteinal inspection l J Closure/Closure Assessment N · · -· · t ] Vapor detector (automatic or manual) l .I lnventcny control [ ]Otoi.m.4water analytical samples ~, '. _., ;_ .:··_ ~l ·< [ ] Tightness test . l l Monitoring wells ,.,1 Soil analytical tests or samples -, , __ . "J> ::1 ;'. f'll · [ J Pressure test I 1Automatic taiik gauging ( ] Visual observation - ? ,; "CJ I I Statistical Inventory Reconciliation . l 1 Manual ~ ( J Other ______~---;-,-,----,=--...,·- gauging . ,:.-· ·•· 0 ---< 0 0 8. Type ofregulated substance discharged: (check one) 2!. lJ Uaknown ( } Used/waste oil . [ JJet fuel I ] Heating oil [J New/lube oil , [.;J Gasoline [ ] Aviation gas [.,) Diesel I I Kerosene I J Mineral acid ( JHazardous substance - includes CERCLA substances ftomUSTs above reportable quantities, pesticides, ammonia, chlorine, and derivatives (write in name or Chemical Abstract Service (CAS ) number • · ·. · · · . I J Other ·

9.Source of Discharge: (check ill that apply) l l Dispensing system I ·I Pipe I lBm:ge.. I l Pipeline ( ] Vehicle [ I Tank { ] Fitting [ I Tanker ship I l Railroad tankcar. [ ] Airplane I I U~wn L J Valve failure . J J Other Vessel !'J Tank truclc l !Drum f.,;,f Other SPILL CONTAINMENT BUCKETS•

10. Cause Qf the discllarge: (check aU that apply) I J Loose connection _ l J Puncture [ I Spill ( ) Collision [ J Corrosion ( l Fire/explosion l J Overfill I J Human erroc [ I Vehicle Accitlent [ J Installation failure 1... J Other UNKNOWN

11. Actions taken in response to the discharge: THE SPII I GQNTAINMFNT Bl JCKETS WERE Bf Pl ACED ON APRIi 3, 2QQZ

12. Comments: DURING SPILL BUCKET REPI ACEMENI ACTIVITIES ON APRIL 3, 20oz FOUR SOIL SAMPLES WERE" COi LECTEO FOR LAB ANAi YSES RES! I( TS OF LAB ANALYSES BEPQBTEO ON 03120/2007 INDICATED FDEP CHAPIEE 62-777 EA C TABI E USOfL GI EANUP TARGET I EVEl EXCEFQANCE ISSUE$ REGARDING THE LQCATJON QE · THE PREVIOUS EL IGIBL;E DISCHARGE BESOLTEP IN THE DEl AY IN SUBMITTING THIS PRE .- . 13. Agencies notified (as applicable): · [ I State Warning Point ( ) National Response Center I J Florida Marine Pairol l ] Fire Department. [.,] DEP (distr:ictlpCISon) I-800 320-0519 I-800-424-8802 (800) 342-5367 [ l County Tanks Progxam

14. To the best of my knowledge and belief, all information ~bmittcd on this form isJtrue, accpraf!,;:!f;f;_"!J'ele. MICHAELE MEOLA (AUTHORIZED REP, -~---..;..·--=---0-~------Printed Name of Owner, Operator or Authorized Representative, Signature of Owner, Operator or Authorized Representative, or Dischar~ or Discharger Charlie Crist Florida Department of Governor Jeff Kottkamp Environmental Protection Lt. Governor Bob Martinez Center 2600 Blair Stone Road Michael W. Sole Tallahassee, Flo1ida 32399-2400 Secretary

July 15, 20.10

CERTIFIED MAIL #7000 0520 0020 9373 6871 RETURN RECEIPT REQUESTED

Mr. Michael Meola ExxonMobil Oil Corporation 5224 West State Road 46, Suite 339 Sanford, FL 32771-9230

Subject: Site Rehabilitation Completion Order Mobil R/S #11193 2605 SW 15th Avenue Boynton Beach, Palm Beach County FDEP Facility ID# 508520561 Discharge Date: 04/21/07 (Non-Program)

Dear Mr. Meola:

The Palm Beach County Department of Environmental Resources Management (ERM), on behalf of the Florida Department of Environmental Protection (Department), has reviewed the Site Rehabilitation Completion Report (SRCR) and No Further Action Proposal (NFAP) dated June 25, 2010 (received June 28, 2010), prepared and submitted by Handex Consulting and Remediation, LLC for the petroleum product discharge referenced above. Documentation submitted with the SRCR/NFAP confirms that criteria set forth in Subsection 62-770.680(1 ), Florida Administrative Code (F.A.C.), have been met. Please refer to the attached maps of the source property and analytical summary tables. The SRCR/NFAP is hereby incorporated by reference in this Site Rehabilitation Completion Order (Order). Therefore, you are released from any further obligation to conduct site rehabilitation at the facility for petroleum product contamination associated with the discharge referenced above, except as set forth below.

In the event concentrations of petroleum products' contaminants of concern increase above the levels approved in this Order, or if a subsequent discharge of petroleum or petroleum product occurs at the facility, the Department may require site rehabilitation to reduce concentrations of petroleum products' contaminants of concern to the levels approved in the SRCR/NFAP or otherwise allowed by Chapter 62-770, F.A.C.

Legal Issues

The Department's Order shall become final unless a timely petition for an administrative hearing is filed under Sections 120.569 and 120.57, Florida Statutes (F.S.), within 21 days of receipt of this Order. The procedures for petitioning for an administrative hearing are set forth below.

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LP SRCO/8520561 04-21-07 SRCO 09-16-09 Mr. Michael F. Meola FDEP Facility ID# 508520561 July 15, 2010 Page two

Persons affected by this Order have the following options:

(A) If you choose to accept the Department's decision regarding the SRCR/NFAP you do not have to do anything. This Order is final and effective on the date filed with the Clerk of the Department, which is indicated on the last page of this Order.

(B) If you choose to challenge the decision, you may do the following:

(1) File a request for an extension of time to file a petition for an administrative hearing with the Department's Agency Clerk in the Office of General Counsel within 21 days of receipt of this Order; such a request should be made if you wish to meet with the Department in an attempt to informally resolve any disputes without first filing a petition for an administrative hearing; or

(2) File a petition for an administrative hearing with the Department's Agency Clerk in the Office of General Counsel within 21 days of receipt of this Order.

Please be advised that mediation of this decision pursuant to Section 120.573, F.S., is not available.

How to Request an Extension of Time to File a Petition for an Administrative Hearing

For good cause shown, pursuant to Subsection 62-110.106(4), F.A.C., the Department may grant a request for an extension of time to file a petition for an administrative hearing. Such a request must be filed (received) by the Department's Agency Clerk in the Office of General Counsel at 3900 Commonwealth Boulevard, Mail Station 35, Tallahassee, Florida, 32399-3000, within 21 days of receipt of this Order. Petitioner, if different from ExxonMobil Oil Corporation, shall mail a copy of the request to ExxonMobil Oil Corporation at the time of filing. Timely filing a request for an extension of time tolls the time period within which a petition for an administrative hearing must be made.

How to File a Petition for an Administrative Hearing

A person whose substantial interests are affected by this Order may petition for an administrative hearing under Sections 120.569 and 120.57, F.S. The petition must contain the information set forth below and must be filed (received) by the Department's Agency Clerk in the Office of General Counsel at 3900 Commonwealth Boulevard, Mail Station 35, Tallahassee, Florida, 32399-3000, within 21 days of receipt of this Order. Petitioner, if different from ExxonMobil Oil Corporation, shall mail a copy of the petition to ExxonMobil Oil Corporation at the time of filing. Failure to file a petition within this time period shall waive the right of anyone who may request an administrative hearing under Sections 120.569 and 120.57, F.S.

Pursuant to Subsection 120.569(2), F.S. and Rule 28-106.201, F.A.C., a petition for an administrative hearing shall contain the following information:

(a) The name, address, and telephone number of each petitioner; the name, address, and telephone number of the petitioner's representative, if any; the facility owner's

LP SRCO 09-16-09 Mr. Michael F. Meola FDEP Facility ID# 508520561 July 15, 2010 Page three

name and address, if different from the petitioner; the FDEP facility number, and the name and address of the facility; (b) A statement of when and how each petitioner received notice of the Department's action or proposed action; ( c) An explanation of how each petitioner's substantial interests are or will be affected by the Department's action or proposed action; (d) A statement of the disputed issues of material fact, or a statement that there are no disputed facts; (e) A statement of the ultimate facts alleged, including a statement of the specific facts the petitioner contends warrant reversal or modification of the Department's action or proposed action; (f) A statement of the specific rules or statutes the petitioner contends require reversal or modification of the Department's action or proposed action; and (g) A statement of the relief sought by the petitioner, stating precisely the action petitioner wishes the Department to take with respect to the Department's action or proposed action.

This Order is final and effective on the date filed with the Clerk of the Department, which is indicated on the last page of this Order. Timely filing a petition for an administrative hearing postpones the date this Order takes effect until the Department issues either a final order pursuant to an administrative hearing or an Order Responding to Supplemental Information provided to the Department pursuant to meetings with the Department.

Judicial Review

Any party to this Order has the right to seek judicial review of it under Section 120.68, F.S., by filing a notice of appeal under Rule 9.110 of the Florida Rules of Appellate Procedure with the Department's Agency Clerk in the Office of General Counsel at 3900 Commonwealth Boulevard, Mail Station 35, Tallahassee, Florida, 32399-3000, and by filing a copy of the notice of appeal accompanied by the applicable filing fees with the appropriate district court of appeal. The notice of appeal must be filed within 30 days after this Order is filed with the Department's clerk ( see below).

Questions

Any questions regarding ERM's review of your SRCR/NFAP should be directed to Steve Rial, P.G. at (561) 233-2502. Questions regarding legal issues should be referred to the Department's Office of General Counsel at (850) 245-2242. Contact with any of the above does not constitute a petition for an administrative hearing or a request for an extension of time to file a petition for an administrative hearing.

LP SRCO 09-16-09 Mr. Michael F. Meola FDEP Facility ID# 508520561 July 15, 2010 Page four

The FDEP Facility Number for this facility is 508520561. Please use this identification on all future correspondence with the Department or ERM.

Sincerely,

MEA/sar Attachments ec: Stephen E. Brown, FDEP Southeast District Office - [email protected] Steve Rial, Palm Beach County ERM - [email protected] Philip R. Cook, Handex Consulting and Remediation, LLC - [email protected] cc: File

FILING AND ACKNOWLEDGMENT FILED, on this date, pursuant to §120.52 Florida Statutes, with the designated Department Clerk, receipt of which is hereby acknowledged.

LP SRCO 09-16-09 P.G. CERTIFICATION

Site Rehabilitation Completion Report/No Further Action Proposal dated June 25, 201 O (received June 28, 2010), for Mobil R/S #11193, located at 2605 SW 15th Avenue, Boynton Beach, FDEP Facility ID# 508520561.

I hereby certify that in my professional judgment, the components of this Site Rehabilitation Completion Report/No Further Action Proposal prepared for the 04/21/07 petroleum discharge discovered at the above referenced facility satisfy the requirements set forth in Chapter 62-770, Florida Administrative Code (F.A.C.), and that the conclusions in this report provide reasonable assurances that the site rehabilitation objectives stated in Chapter 62-770, F.A.C., have been met.

I personally completed this review.

✓ This review was conducted by Steve Rial working under my direct supervision.

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Date

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LP SRCO/8520561 04-21-07 SRCO.doc 09-16-09 Site Map

Florida Dept. of Environmental Protection 7-Eleven #348790 2605 SW 15th Avenue, Boynton Beach, FL FDEP FAC #50/8520561 Drawn Date 09/25/18 Designed Figure 1 Approved N

Scale In Feet (Approximate)

0 30 TABLE 2: GROUNDWATER ANALYTICAL SUMMARY - BTEX/MTBE/TRPH Facility Name: 7 - ELEVEN STORE # 34790 ( FORMER MOBIL ) Facility Address: 2605 SW 15TH AVE BOYNTON BEACH PALM BEACH ,FL Facility ID #: 50/8520651 Analytical Results = ug/L Not Sampled = NS Sample Ethyl- Total Location Date Benzene Toluene benzene Xylenes MTBE TRPH Table V NADC: 100 400 300 200 200 50,000 Table I GCTL: 1 40 30 20 20 5,000 MW-1 09/17/03 11.5 42.0 77.3 238 42.2 NS 12/17/03 1.00 6.1 12.6 34.5 3.3 NS 03/22/04 16.3 3.7 13.6 34.7 26.6 NS 06/09/04 16.8 <1.0 <1.0 3.0 8.3 NS 10/08/04 <1.00 <1.0 <1.0 <3.0 <1.0 NS 12/24/04 4.40 0.4 0.9 <0.50 20.7 NS 04/01/05 6.40 0.9 6.2 8.6 53.2 NS 06/30/05 <1.00 <1.0 <1.0 <3.0 0.6 NS 09/22/05 <0.340 <0.340 <0.350 <0.770 <0.800 NS 01/16/06 <0.440 <0.540 <0.410 <1.23 1.20 NS 04/18/06 <0.440 <0.540 <0.410 <1.23 <0.510 NS 07/12/06 <0.440 <0.540 <0.410 <1.23 <0.510 NS 03/26/07 0.722 <0.600 <0.460 <0.840 <0.380 NS 09/06/07 <0.610 <0.600 <0.460 <0.840 <0.380 NS 04/14/08 <0.500 <0.500 <0.520 <1.68 <0.590 NS 07/10/08 <0.500 <0.500 <0.520 <1.68 <0.590 NS 08/11/15 0.43 U 0.48 U 0.33 U 0.23 U 0.30 U NS 01/16/17 NS NS NS NS NS 150 U

MW-2 09/17/03 <1.0 1.2 <1.00 <1.00 <1.00 NS 12/17/03 <1.00 <1.00 <1.00 <3.0 <1.00 NS 03/22/04 <1.00 <1.00 <1.00 <3.0 7.5 NS 06/09/04 <1.00 <1.00 <1.00 <3.0 <1.00 NS 10/08/04 <1.00 <1.00 <1.00 <3.0 1.1 NS 12/24/04 <0.19 <0.20 <0.20 <0.50 291 NS 04/01/05 <1.00 <1.00 <1.00 <3.0 <1.00 NS 06/30/05 <1.00 <1.00 <1.00 <3.0 <1.00 NS 09/22/05 <0.340 <0.340 <0.350 <0.770 <0.800 NS 01/16/06 <0.440 <0.540 <0.410 <1.23 <0.510 NS 04/18/06 <0.440 <0.540 <0.410 <1.23 <0.510 NS 07/12/06 <0.440 <0.540 <0.410 <1.23 <0.510 NS 03/26/07 <0.610 <0.600 <0.460 <0.840 <0.380 NS 09/06/07 <0.610 <0.600 <0.460 <0.840 <0.380 NS 04/14/08 <0.500 <0.500 <0.520 <1.68 <0.590 NS 07/10/08 <0.500 <0.500 <0.520 2.31 I <0.590 NS 08/11/15 0.43 U 0.48 U 0.33 U 0.23 U 0.30 U NS

MW-3 09/17/03 <1.0 3.6 31.0 581 <1.0 5020 12/17/03 <1.00 6.3 25.1 670 <1.0 6220 03/22/04 <1.00 9.9 40.7 810 <1.0 NS 06/09/04 <1.00 4.3 31.3 359 <1.0 NS 10/08/04 <1.00 1.00 5.10 139.1 <1.00 NS 12/24/04 <0.30 1.10 10.7 124.7 <0.51 NS 04/01/05 0.20 1.5 9.1 114 <1.0 NS 06/30/05 <1.00 0.4 2.6 49.5 <1.0 NS 09/22/05 <0.340 1.51 5.50 81.7 <0.800 NS 01/16/06 <0.440 1.15 6.86 149 <0.510 NS 04/18/06 <0.440 0.987 7.35 88.6 <0.510 NS 07/12/06 <0.440 0.753 4.92 52.3 <0.510 NS 03/26/07 <0.610 <0.600 1.64 32.2 <0.380 NS 09/06/07 <0.610 <0.600 6.41 31.7 <0.380 NS 04/14/08 <0.500 <0.500 <0.520 7.40 <0.590 NS 07/10/08 <0.500 0.536 I <0.520 35.9 <0.590 NS 11/07/08 <0.500 0.686 I 4.49 71.3 <0.590 NS 02/28/18 0.31 U 0.30 U 0.36 U 2.5 I 0.23 U 291 05/29/18 0.31 U 0.30 U 0.36 U 8.4 0.23 2100 08/29/18 0.31 U 0.30 U 0.36 U 0.72 U 0.23 U 240 U

Page 1 of 3 TABLE 2: GROUNDWATER ANALYTICAL SUMMARY - BTEX/MTBE/TRPH Facility Name: 7 - ELEVEN STORE # 34790 ( FORMER MOBIL ) Facility Address: 2605 SW 15TH AVE BOYNTON BEACH PALM BEACH ,FL Facility ID #: 50/8520651 Analytical Results = ug/L Not Sampled = NS Sample Ethyl- Total Location Date Benzene Toluene benzene Xylenes MTBE TRPH Table V NADC: 100 400 300 200 200 50,000 Table I GCTL: 1 40 30 20 20 5,000 MW-4 09/17/03 <1.0 <1.0 <1.0 <1.0 <1.0 <200 12/17/03 <1.00 <1.0 <1.0 <3.0 <1.0 <200 03/22/04 <1.00 <1.0 <1.0 <3.0 <1.0 NS 06/09/04 <1.00 <1.0 <1.0 <3.0 <1.0 NS 10/08/04 <1.00 <1.00 <1.00 <2.00 <1.00 NS 12/24/04 <0.30 <0.30 <0.25 <0.94 <0.51 NS 04/01/05 <1.00 <1.0 <1.0 <3.0 <1.0 NS 06/30/05 <1.00 <1.0 <1.0 <3.0 <1.0 NS 09/22/05 <0.340 <0.340 <0.350 <0.770 <0.800 NS 01/16/06 <0.440 <0.540 <0.410 <1.23 <0.510 NS 04/18/06 <0.440 <0.540 <0.410 <1.23 <0.510 NS 07/12/06 <0.440 <0.540 <0.410 <1.23 <0.510 NS 03/26/07 <0.610 <0.600 <0.460 <0.840 <0.380 NS 09/06/07 <0.610 <0.600 4.50 <0.840 <0.380 NS 04/14/08 <0.500 <0.500 <0.520 <1.68 <0.590 NS 07/10/08 <0.500 <0.500 <0.520 <1.68 <0.590 NS 11/07/08 <0.500 <0.500 <0.520 <1.68 <0.590 NS 08/11/15 0.43 U 0.48 U 0.33 U 0.23 U 0.30 U NS 01/16/17 NS NS NS NS NS 150 U

MW-5 01/30/08 17.5 4.37 <0.520 14.6 7.02 NS 07/09/08 <0.500 <0.500 <0.520 <1.68 <0.590 NS 10/03/08 <0.500 <0.500 <0.520 <1.68 <0.590 NS 01/13/09 0.500 U 0.500 U 0.520 U 1.68 U 0.590 U NS 04/10/09 0.500 U 0.500 U 0.520 U 1.68 U 0.590 U NS 06/30/09 0.390 U 0.340 U 0.380 U 1.18 U 0.450 U NS 10/19/09 0.390 U 0.340 U 0.380 U 1.18 U 0.450 U NS 08/11/15 0.43 U 0.48 U 0.33 U 0.23 U 0.30 U NS

MW-6 01/30/08 9.11 1.72 <0.520 1.76 I 4.08 NS 07/09/08 <0.500 <0.500 <0.520 <1.68 <0.590 NS 10/03/08 <0.500 <0.500 <0.520 <1.68 <0.590 NS 01/13/09 0.500 U 0.500 U 0.520 U 1.68 U 0.590 U NS 04/10/09 0.500 U 0.500 U 0.520 U 1.68 U 0.590 U NS 06/30/09 0.390 U 0.340 U 0.380 U 1.18 U 0.450 U NS 10/19/09 0.390 U 0.340 U 0.380 U 1.18 U 0.450 U NS 08/11/15 0.43 U 0.48 U 0.33 U 0.23 U 0.30 U NS

MW-7 01/30/08 191 37.6 0.808 I 70.7 40.5 NS 07/09/08 72.5 2.22 <0.520 <1.68 6.13 NS 10/03/08 <0.500 <0.500 <0.520 <1.68 2.87 NS 01/13/09 0.655 I 0.500 U 0.520 U 1.68 U 4.60 NS 04/10/09 0.500 U 0.500 U 0.520 U 1.68 U 0.590 U NS 06/30/09 0.390 U 0.380 U 0.380 U 1.18 U 2.38 NS 10/19/09 0.390 U 0.380 U 0.380 U 1.18 U 2.25 NS 08/11/15 0.43 U 0.48 U 0.33 U 0.23 U 0.30 U NS 01/16/17 NS NS NS NS NS 150 U

MW-8 04/10/08 55.0 1.83 <0.520 8.87 18.7 NS 07/09/08 63.9 <0.500 <0.520 <1.68 12.3 NS 10/03/08 16.3 0.721 I <0.520 <1.68 2.26 NS 01/13/09 3.89 0.531 I 0.520 U 1.68 U 6.55 NS 04/10/09 0.500 U 0.500 U 0.520 U 1.68 U 0.590 U NS 06/30/09 0.625 I 0.340 U 0.380 U 1.18 U 1.75 NS 10/19/09 0.611 I 0.340 U 0.380 U 1.18 U 3.12 NS 08/11/15 0.43 U 0.48 U 0.33 U 0.23 U 0.40 I NS

Page 2 of 3 TABLE 2: GROUNDWATER ANALYTICAL SUMMARY - BTEX/MTBE/TRPH Facility Name: 7 - ELEVEN STORE # 34790 ( FORMER MOBIL ) Facility Address: 2605 SW 15TH AVE BOYNTON BEACH PALM BEACH ,FL Facility ID #: 50/8520651 Analytical Results = ug/L Not Sampled = NS Sample Ethyl- Total Location Date Benzene Toluene benzene Xylenes MTBE TRPH Table V NADC: 100 400 300 200 200 50,000 Table I GCTL: 1 40 30 20 20 5,000 MW-9 04/10/08 <0.500 <0.500 <0.520 <1.68 <0.590 NS 07/09/08 <0.500 <0.500 <0.520 <1.68 <0.590 NS 08/11/15 0.43 U 0.48 U 0.33 U 0.23 U 0.30 U NS 01/16/17 NS NS NS NS NS 140 U

MW-10 04/10/08 <0.500 <0.500 <0.520 <1.68 <0.590 NS 07/09/08 <0.500 <0.500 <0.520 <1.68 <0.590 NS 08/11/15 0.43 U 0.48 U 0.33 U 0.23 U 0.30 U NS 01/16/17 NS NS NS NS NS 150 U

MW-11 08/11/08 <0.500 <0.500 <0.520 <1.68 1.68 NS 10/03/08 1.24 <0.500 <0.520 <1.68 1.67 NS 01/13/09 6.24 0.500 U 0.520 U 1.68 U 4.91 NS 04/10/09 2.73 0.500 U 0.520 U 1.68 U 0.590 U NS 06/30/09 0.492 I 0.340 U 0.380 U 1.18 U 3.76 NS 10/19/09 0.390 U 0.340 U 0.380 U 1.18 U 0.450 U NS 01/16/17 NS NS NS NS NS 150 U

TW-12 08/07/08 <0.500 <0.500 <0.520 <1.68 <0.590 NS

MW-13 04/04/16 0.10 U 0.50 U 0.50 U 1.5 U 0.50 U 850 01/16/17 NS NS NS NS NS 931 05/29/18 0.31 U 0.30 U 0.36 U 0.72 U 0.23 U 1060 08/29/18 0.31 U 0.30 U 0.36 U 0.72 U 0.23 U 383

NOTES: MTBE - Methyl tert-butyl Ether TRPH - Total Recoverable Petroleum Hydrocarbons by Florida Petroleum Residual Organics (FLPRO) Table V NADC - Natural Attenuation Default Concentrations - April 17, 2005 Chapter 62-777, F.A.C. Table I CTL - Cleanup Target Levels - April 17, 2005 Chapter 62-777, F.A.C. U - The compound was analyzed for but not detected. I - The reported value is between the laboratory method detection limit and the method reporting limit. P6 - Sample received unpreserved, however the sample was analyzed within 7 days per EPA recommendation. * Less than (#) as summarized on the ViroGroup, Inc. RAP-Implementation project status report tables.

NOTE: All results reported in micrograms per liter (ug/l). "NS" denotes not sampled. "MTBE" denotes methyl tertiary butyl ether. "BDL" denotes below detection limits. U = Compound was analyzed for but not detected. I = Reported value is between the laboratory method detection limit and method reporting limit. V = The analyte was detected in both the sample and the associated method blank. "Table I" refers to Table I, Groundwater and Surface Water Target Levels (Groundwater Criteria) of FDEP Chapter 62-777 F.A.C. "Table V" refers to Table V, Natural Attenuation Default Concentrations (Source) of FDEP Chapter 62-777 F.A.C. *= EFFECTIVE April 17, 2005. PREVIOUSLY 50 ug/l and 500 ug/l

Page 3 of 3 TABLE 3: GROUNDWATER ANALYTICAL SUMMARY - PAHs Facility Name: 7 - ELEVEN STORE # 34790 ( FORMER MOBIL ) Facility Address 2605 SW 15TH AVE BOYNTON BEACH PALM BEACH ,FL Facility ID #: 50/8520561 Analytical Results = ug/L Not Sampled = NS

Sample Location Date Acenaphthene Acenaphthylene Anthracene Benzo(a)anthracene Benzo(a)pyrene Benzo(b)fluoranthene Benzo(g,h,i)perylene Benzo(k)fluoranthene Chrysene Dibenz(a,h)anthracene Fluoranthene Fluorene Indeno(1,2,3-cd)pyrene 1-Methylnaphthalene 2-Methylnaphthalene Naphthalene Phenanthrene Pyrene Table V NADC: 200 2,100 21,000 5 20 5 2,100 50 480 0.5 2,800 2,800 5 280 280 140 2,100 2,100 Table I CTL: 20 210 2,100 0.05 0.2 0.05 210 0.5 4.8 0.005 280 280 0.05 28 28 14 210 210 MW-1 09/17/03 <1.00 <1.00 <0.50 <0.10 <0.10 <0.10 <0.20 <0.14 <0.10 <0.20 <0.20 <0.50 <0.20 2.12 11.5 9.57 <0.50 <0.20 12/17/03 <1.00 <1.00 <0.50 <0.10 <0.10 <0.10 <0.20 <0.14 <0.10 <0.20 <0.20 <0.50 <0.20 <1.00 <1.00 2.14 <0.50 <0.20 08/11/15 0.021 U 0.021 U 0.032 U 0.037 U 0.036 U 0.034 U 0.038 U 0.058 U 0.026 U 0.050 U 0.050 U 0.016 U 0.043 U 0.024 U 0.023 U 0.023 U 0.033 U 0.029 U

MW-2 09/17/03 <1.00 <1.00 <0.50 <0.10 <0.10 <0.10 <0.20 <0.14 <0.10 <0.20 <0.20 <0.50 <0.20 <1.00 <1.00 <1.00 <0.50 <0.20 12/17/03 <1.00 <1.00 <0.50 <0.10 <0.10 <0.10 <0.20 <0.14 <0.10 <0.20 <0.20 <0.50 <0.20 <1.00 <1.00 <1.00 <0.50 <0.20 08/11/15 0.021 U 0.021 U 0.032 U 0.037 U 0.036 U 0.034 U 0.038 U 0.058 U 0.026 U 0.050 U 0.050 U 0.016 U 0.043 U 0.024 U 0.023 U 0.023 U 0.033 U 0.029 U

MW-3 02/28/18 0.32 U 0.32 U 0.20 U 0.032 U 0.032 U 0.032 U 0.032 U 0.032 U 0.032 U 0.032 U 0.20 U 0.20 U 0.032 U 0.32 U 0.32 U 0.32 U 0.20 U 0.20 U 05/29/18 0.32 U 0.32 U 0.20 U 0.032 U 0.032 U 0.032 U 0.032 U 0.032 U 0.032 U 0.032 U 0.20 U 0.20 U 0.032 U 0.79 I 0.32 U 0.32 U 0.20 U 0.20 U 08/29/18 0.33 U 0.33 U 0.21 U 0.033 U 0.035b I 0.033 U 0.097b I 0.033 U 0.033 U 0.033 U 0.21 U 0.21 U 0.053b I 0.33 U 0.33 U 3.6b V 0.21 U 0.21 U

MW-4 08/11/15 0.021 U 0.021 U 0.032 U 0.037 U 0.036 U 0.034 U 0.038 U 0.058 U 0.026 U 0.050 U 0.050 U 0.016 U 0.043 U 0.024 U 0.023 U 0.023 U 0.033 U 0.029 U

MW-5 08/11/15 0.021 U 0.021 U 0.032 U 0.037 U 0.036 U 0.034 U 0.038 U 0.058 U 0.026 U 0.050 U 0.050 U 0.016 U 0.043 U 0.024 U 0.023 U 0.023 U 0.033 U 0.029 U

MW-6 08/11/15 0.021 U 0.021 U 0.032 U 0.037 U 0.036 U 0.034 U 0.038 U 0.058 U 0.026 U 0.050 U 0.050 U 0.016 U 0.043 U 0.024 U 0.023 U 0.023 U 0.033 U 0.029 U

MW-7 08/11/15 0.021 U 0.021 U 0.032 U 0.037 U 0.036 U 0.034 U 0.038 U 0.058 U 0.026 U 0.050 U 0.050 U 0.016 U 0.043 U 0.024 U 0.023 U 0.023 U 0.033 U 0.067 I

MW-8 08/11/15 0.021 U 0.021 U 0.032 U 0.037 U 0.036 U 0.034 U 0.038 U 0.058 U 0.026 U 0.050 U 0.050 U 0.016 U 0.043 U 0.024 U 0.023 U 0.023 U 0.033 U 0.029 U

MW-9 08/11/15 0.021 U 0.021 U 0.032 U 0.037 U 0.036 U 0.034 U 0.038 U 0.058 U 0.026 U 0.050 U 0.050 U 0.016 U 0.043 U 0.024 U 0.023 U 0.023 U 0.033 U 0.029 U

MW-10 08/11/15 0.021 U 0.021 U 0.032 U 0.037 U 0.036 U 0.034 U 0.038 U 0.058 U 0.026 U 0.050 U 0.050 U 0.016 U 0.043 U 0.024 U 0.023 U 0.023 U 0.033 U 0.029 U

Page 1 of 2 TABLE 3: GROUNDWATER ANALYTICAL SUMMARY - PAHs Facility Name: 7 - ELEVEN STORE # 34790 ( FORMER MOBIL ) Facility Address 2605 SW 15TH AVE BOYNTON BEACH PALM BEACH ,FL Facility ID #: 50/8520561 Analytical Results = ug/L Not Sampled = NS

Sample Location Date Acenaphthene Acenaphthylene Anthracene Benzo(a)anthracene Benzo(a)pyrene Benzo(b)fluoranthene Benzo(g,h,i)perylene Benzo(k)fluoranthene Chrysene Dibenz(a,h)anthracene Fluoranthene Fluorene Indeno(1,2,3-cd)pyrene 1-Methylnaphthalene 2-Methylnaphthalene Naphthalene Phenanthrene Pyrene Table V NADC: 200 2,100 21,000 5 20 5 2,100 50 480 0.5 2,800 2,800 5 280 280 140 2,100 2,100 Table I CTL: 20 210 2,100 0.05 0.2 0.05 210 0.5 4.8 0.005 280 280 0.05 28 28 14 210 210 MW-13 04/04/16 0.025 U 0.025 U 0.025 U 0.025 U 0.025 U 0.025 U 0.025 U 0.025 U 0.025 U 0.025 U 0.025 U 0.025 U 0.025 U 1.0 U 1.0 U 1.0 U 0.050 U 0.025 U 05/29/18 0.32 U 0.32 U 0.20 U 0.032 U 0.032 U 0.032 U 0.037 I 0.032 U 0.032 U 0.032 U 0.20 U 0.20 U 0.032 U 0.32 U 0.32 U 0.32 U 0.20 U 0.20 U 08/29/18 0.33 U 0.33 U 0.21 U 0.033 U 0.033 U 0.033 U 0.033 U 0.033 U 0.033 U 0.033 U 0.21 U 0.21 U 0.033 U 0.33 U 0.43b IV 9.0b V 0.21 U 0.21 U

NOTES: PAH - Polycyclic Aromatic Hydrocarbons Table V NADC - Natural Attenuation Default Concentrations - April 17, 2005 Chapter 62-777, F.A.C. Table I CTL - Cleanup Target Levels - April 17, 2005 Chapter 62-777, F.A.C. Analysis for PAHs not performed during previous assessment or remediation activities. U - The compound was analyzed for but not detected. I - The reported value is between the laboratory method detection limit and the method reporting limit.

NOTE: All results reported in micrograms per liter (ug/l). Unless noted (mg/L). PAHs denotes Polynuclear Aromatic Hydrocarbons. PRO's refers to Petroleum Range Organics. 'Table I, refers to Table I, Groundwater and Surface Water Levels (Groundwater Criteria) of FDEP Chapter 62-777 F.A.C. Table V, refers to Table V, Natural Attenuation Default Concentrations (Source) of FDEP Chapter 62-777 F.A.C. NS= Not Sampled *= EFFECTIVE April 17, 2005. PREVIOUSLY 0.2 ug/l and 20 ug/l **= EFFECTIVE April 17, 2005. PREVIOUSLY 20 ug/l and 200 ug/l I = Reported value is between the laboratory method detection limit and method reporting limit. U = Compound was analyzed for but not detected. (b) = Hit did not confirm by re-extraction and reanalysis beyond hold time

Page 2 of 2

ATTACHMENT C

AnAqSim Information and Model Results Software Spotlight/ Motomu Ibaraki, Software Editor

AnAqSim: Analytic Element Modeling Software for Multi-Aquifer, Transient Flow reviewed by Charles McLane

Introduction workstation with dual hexacore Xeon CPUs (2.4 MHz) Analytic element method (AEM) groundwater flow and 12 GB RAM running Windows 7; and in Windows models, first developed in the early 1980s, have made XP emulation mode (VMWare Fusion v 3.1.3) on a great advances over the past decade. Their power and MacBook Pro (Intel Core 2 Duo; 2.33 GHz; 3 GB ease of use place them among the first tools that a RAM; Mac OS X 10.5.8). Minor graphics artifacts in hydrogeologist or engineer may wish to apply when several of the AnAqSim windows on the MacBook Pro the need arises to develop a rapid and cost-effective when running in XP emulation mode (apparently caused answer to a question regarding a groundwater flow sys- by conflicts with the VMWare display drivers) were tem. AEM models are capable of simulating both confined eliminated by turning off hardware acceleration in the or water table aquifers, and heterogeneities such as zones Windows XP Display Settings control panel. of differing hydraulic conductivity or differing model base The current version of AnAqSim is Windows XP elevation (e.g., bedrock). Newer AEM models permit mul- and Windows 7 compliant, and runs in 32-bit mode. tiple aquifer layers, transient simulations, and analysis A 64-bit version, which will permit the execution of of saltwater interface boundaries. Each hydrologic fea- larger models (i.e., a greater number of element coefficient ture or “element” is represented by a precise analytic matrix equations) is being developed. mathematical solution, with those element solutions being superimposed (added together) to form more complex Installation ∼ solutions. The AnAqSim installation file ( 91 MB) was down- Model set up is quick. No construction of a complex loaded from the Fitts Geosolutions web site and installed computational grid or mesh is required. In addition, the in less than 10 min. Microsoft.net library is automatically tight integration of model post-processing tools in many downloaded and installed if needed. System requirements, AEM models supports a rapid run-display-change-rerun as stated in the User Guide are: (1) Windows XP, Win- cycle that allows the modeler to focus on the model dows 7 (32 or 64 bit); (2) At least 250 MB of available concepts and interpretation, and not on the mechanics of disk space; and (3) At least 1 GB memory–more memory model modification. is needed for larger problems. A new AEM model called AnAqSim applies a new License activation is performed by emailing to Fitts theoretical approach based on model domains to incorpo- Geosolutions the Site Code generated by AnAqSim fol- rate many of these powerful AEM features. AnAqSim was lowing installation; the Site Key to activate the license is returned to the user in an email reply. AnAqSim can be developed by Dr. Charles Fitts of Fitts Geosolutions and uninstalled using the standard Windows installation man- is available on the web site http://www.AnAqSim.com. ager interface. It is necessary to uninstall each previous version of AnAqSim before installing a newer updated How We Tested version.

Test Computers Test Example Problems AnAqSim version 2011-2 (released August 20, 2011) The review tested the software by running test was reviewed and tested on a Dell Precision T5500 problems provided on the AnAqSim web site, completing the tutorial described in the User Guide, and working McLane Environmental LLC, 707 Alexander Road, Suite 206, with data from three reviewer-generated test problems, Princeton, NJ 08540; [email protected] as described briefly below. © 2011, The Author(s) Ground Water © 2011, National Ground Water Association. 1. AnAqSim check problems: Dr. Fitts provides on the doi: 10.1111/j.1745-6584.2011.00892.x AnAqSim web site descriptions of, and model input

NGWA.org GROUND WATER 1 files for, a series of check problems that demonstrate logical and well laid out. Models are developed and exe- AnAqSim solution accuracy. The problems included cuted, graphic results are generated, and post-processing checks for confined and unconfined, single-layer and analyses are conducted using the features of primarily multi-layer models; recharge from above and leakage three menus: Model Input, Plot Input, and Analysis. from below an aquifer layer; three-dimensional (3D) particle tracking; formation of a saltwater interface in 1. The Model Input menu allows the user to specify a coastal aquifer model; and checks against known basic model parameters such as solver settings and analytical model solutions (e.g., a model problem from time step settings, number and types of solution an AEM textbook and a transient match to the well- domains (confined, unconfined, saltwater interface, known Theis equation). etc.), hydrologic feature elements within those domains 2. AnAqSim Tutorial: The AnAqSim Tutorial, presented (wells, rivers, etc.), boundary condition settings, and in the User Guide, is built around a small watershed, areas of recharge over the model domain and/or with known hydrologic boundaries, a stream running leakage between model layers. through the center to an outlet point on the boundary, 2. The Plot Input menu allows the user to set the model and a well field pumping near the river. view and solution space window, and to define what 3. Flow to a well in a horizontally anisotropic aquifer: model output graphics to display and how to display The reviewer developed a test problem for a fully- them (e.g., water level contours, flow pathlines, and penetrating well pumping in a horizontally anisotropic flow vectors). unconfined aquifer. 3. The Analysis menu contains a valuable collection of 4. Saltwater interface response to pumping: The reviewer post-processing and analysis tools that are described developed a test problem in which a shallow partially in the Capabilities section below. penetrating supply well is pumped at some distance above a saltwater interface that forms the lower To facilitate model construction, AnAqSim has a boundary of a freshwater lens aquifer. digitizing capability that allows use of the mouse to 5. Aquifer test data analysis for a multi-layer aquifer draw in the model window a line or polyline for a system: The reviewer developed a test problem in particular feature or boundary. The coordinate list of that which AnAqSim is used to estimate aquifer properties line is captured and placed in an internal clipboard from by fitting drawdown data from a pumping test in which it can be pasted into the coordinates cell of the an aquifer system consisting of three aquifer zones corresponding element data grid. While the user interface separated by two intervening aquitards. for model setup does not make extensive use of standard Windows features such as data entry dialog boxes or point-and-click drawing and editing of model elements, What We Found it is clean and functional, and has the added benefit of allowing the user to easily access, review and edit the User Interface underlying model database. Also, for certain data entry The user interface consists of two main views: Data cells, the user is presented with a list of previously entered View and Plot View, controlled by a Switch View tab. features from which to select; this avoids unnecessary In Data View the user can enter and edit input data in typing for long feature and variable names and prevents data grids (spreadsheet-like tables) in the upper portion of possible typographical errors. the window, while in the lower portion of the window a The software does not have a comprehensive Run Log displays a variety of text information including model data viewer mode where data for all elements and files recently opened and closed, solver iterations during a model settings can be viewed in a single concise summary, run, status and error messages, and information regarding nor does the current version write out a “data echo” file the status of the user’s AnAqSim license. Plot View summarizing all model input parameters. However, model displays a map of the current model elements and data and settings entered in the various data grids is stored simulation output (contours, pathlines, etc.), as well as in a single XML file that can be examined fairly readily a Plot View Menu that contains functions related to the using the standard Windows Notepad application or, for a plot including view zoom controls, a tool for digitizing more organized and readable viewing experience, via the model features, and a Plot File menu that allows graphics free Microsoft XML Notepad application. output in various file formats. At the left of the Plot View window is a dashboard of collapsible and expandable Capabilities and Performance model output fields that allow the user to inspect the AnAqSim uses a variation of the AEM that divides results of a simulation by moving the mouse cursor the modeled region into subdomains (called “domains” over the model space. Values displayed include cursor in AnAqSim), each enclosed by its own boundary with x, y location, hydraulic head, saturated thickness, and its own definition of aquifer parameters and its own groundwater flow velocity and direction. separate AEM model (Fitts 2010). A variety of line Modeling operations, while involving a moderately boundary conditions are available in AnAqSim; each large number of steps as in most modeling environments, formed by a polyline that can be easily configured to are controlled in AnAqSim in a manner that is relatively accurately match a boundary or hydrologic feature. The

2 GROUND WATER NGWA.org line boundary condition is approximated using linesink regarding how to set up a variety of simple AnAqSim elements similar to those described by Jankovic and models. Barnes (1999). 2. AnAqSim Tutorial: The tutorial begins with a one-level Each subdomain model is written in terms of two- (layer) steady model of a small watershed adjacent to dimensional (2D) functions, but 3D flow may be simulated a lake. Groundwater discharges to the stream running using multiple levels in a model (up to five layers). down the center of the watershed and to a portion In multilevel models, the resistance to vertical flow is of the lakeshore boundary. A pumping well is then accounted for in the vertical leakage between levels. placed in the center area of the watershed near the Multiple levels (subdomains stacked vertically and leaking stream. More complex geology near the well field vertically to each other) can abut an area with subdomains area is incorporated by drawing a large polygon in just a single level. This allows the model to focus centered on the well, creating three levels (layers), layering and computational effort in the area of interest, and assigning them differing hydraulic properties. The with a simpler single-level model for distant areas. model is then converted from steady to transient to AnAqSim uses multi-quadric interpolator functions to examine drawdown through time at the pumping well. simulate spatially variable area source/sinks, seepage and Display and control of contours, pathlines, and flow storage (Strack and Jankovic 1999; Fitts 2010). vectors are presented. The tutorial introduces many of AnAqSim provides transient simulation capabilities the AnAqSim tools available for checking simulated by using finite difference time steps as suggested by conditions on boundaries and near wells and streams Haitjema and Strack (1985). The transient term in the to determine that a valid solution has been obtained. flow equations is handled in essentially the same manner This tutorial gives a good introduction to many of the as it is in finite difference programs like MODFLOW. capabilities of AnAqSim. There is a limit to the application of AnAqSim 3. Flow to a well in a horizontally anisotropic aquifer: where the system of equations gets so large that it takes A single-layer unconfined domain (with impermeable too long to solve in a reasonable time. That limit on base = 0 foot) was set up with K1 = 80 ft/d oriented present standard personal computers is probably in the N45E, and K2 = 20 ft/d oriented perpendicular to K1. range of 5000 to 10,000 equations. For situations with This created a horizontal anisotropy K1/K2of4:1. more equations than this, a numerical method like finite The western boundary was set at a constant head of differences or finite elements may be a better choice. 125 feet; eastern boundary was set at 100 feet; north The shift to 64-bit systems will allow larger systems of and south boundaries were no-flow. A pumping well equations, with computation time still being an issue for with a discharge of 40,100 ft3/d (300,000 gpd) was very large models, but rapidly evolving computing power placed in the eastern portion of the flow field. Model will likely ease these limits with time. solve time was less than 2 s. Particle paths delineating AnAqSim allows import of basemap files to facilitate the capture zone of the well are oriented at an angle the layout and construction of a model. The software does to hydraulic head contours due to the horizontal not currently have the capability of exporting data files anisotropy (Figure 1). No problems were encountered of simulation results (e.g., gridded contour data, pathline during the model development or execution. points, flow vectors) to external visualization or plotting 4. Saltwater interface response to pumping:Totest software. Graphic depictions of model results can be saved AnAqSim’s saltwater interface capability, a circular in a number of formats including (BMP, JPG, PNG, PDF, island model was set up with radius of 8000 feet, DWG, DXF, and others). aquifer thickness of 500 feet, hydraulic conductivity The Analysis menu offers a large number of post- of 150 ft/d and a sea-level constant head boundary processing analysis tools that allow the user to examine (0.5 feet msl) around the entire coastline. In the center model results in data list and chart formats including of the island a circular multilevel domain with radius checks on boundary conditions; pumping and constant 1000 feet was created to represent the well field area. head well discharges; river reach fluxes; various model A shallow well, extracting 100,000 ft3/d (750,000 gpd) conditions along a transect line of the modeler’s choosing was placed in Level 1 representing sandy material including steady-state heads along the transect, transient (Kh = 150 ft/d, Kv = 30 ft/d). Level 2 represented a heads along the transect, fluxes through the transect, and silty clay zone (Kh = 30 ft/d, Kv = 5 ft/d) between saltwater interface location along the transect; compari- the well screen and the deeper sand zone (Level 3) son of model results to user-specified calibration targets; in which the saltwater interface was located. Model and simulated hydrographs displaying either head or draw- solve time was approximately 20 s. The AnAqSim down vs. time at one or more user-specified observation Analysis tool “Graph Conditions Along a Line” was points in the model. used to plot the saltwater interface location for non- pumping and pumping conditions (Figure 2a and 2b). Results of Test Problem Evaluation No problems were encountered during the model 1. AnAqSim check problems: All check problems ran development or execution. Care must be taken in with no difficulties. These data files, in addition saltwater interface models in areas where saltwater to illustrating and checking AnAqSim features and thickness may go to zero within a portion of an solution accuracy, serve as guides for a new user interface domain.

NGWA.org GROUND WATER 3 Figure 1. Capture zone for pumping well in unconfined aquifer with 4:1 horizontal anisotropy.

5. Aquifer test data analysis for a multi-layer aquifer measured from observation wells in all three aquifer system: As a test of both its transient and multilevel zones. A five-level radial model (radius 20,000 feet) domain capabilities, AnAqSim was used to analyze was set up with Levels 1, 3, and 5 representing data from a pumping test in a multi-aquifer system. the upper, middle, and lower aquifers, respectively; In the field test, water was extracted at a constant rate with Levels 2 and 4 representing the aquitards. In for greater than 48 h from a mid-level aquifer zone that this example, transient drawdown data was recorded was separated from overlying and underlying aquifer in AnAqSim at observation wells located in each zones by respective aquitard units. Test data were aquifer unit at a radial distance of 150 feet from

(a)

(b)

Figure 2. Saltwater interface location simulated by AnAqSim in freshwater lens aquifer for (a) pre-pumping conditions, and (b) with pumping from shallow zone at 750,000 gpd above a silty clay layer that separates the well screen from the deeper zone in which the interface resides.

4 GROUND WATER NGWA.org the pumping well (corresponding to one set of field What We Liked observation well locations). Hydraulic conductivity Here is what we liked about AnAqSim: and storage values were adjusted in aquifer and aquitard domains to achieve acceptable matches with • Powerful capabilities (multi-layer, anisotropy, transient, measured drawdown data. The AnAqSim Analysis etc.) with the rapid model development and scale- tool “Graph Drawdown Hydrographs” was used to independent accuracy of the analytic element method. plot simulation results and measured data which can • Import of complex basemap graphics (color, polylines, be read into AnAqSim as part of the matching patterns, air photos, etc.) to facilitate AEM model process (Figure 3). Simulation of 12 timesteps at a construction. step multiplier of 1.2 required approximately 30 s • Analysis tools for post-processing model results (con- on the T5500 (100 s on the MacBook Pro) per tours, particle tracking, flow vector plots, numerous complete drawdown simulation. Multiple simulations graphs and charts, data listings). were required to arrive at an acceptable set of aquifer • Tech support. and aquitard parameters. • Price. Software Documentation and Help System The User Guide (112 pages) is very thorough, beginning with an overview of the subdomain analytic What We Did Not Like element method on which AnAqSim is based; walking the Here are some areas in which AnAqSim could be user through a clearly explained and illustrated tutorial; improved: and then clearly and methodically stepping through the various menus, tools, and features of the software • With the exception of certain lists containing domain with diagrams to illustrate key concepts. The AnAqSim or boundary feature names, the data entry system places software Help system is well written, with a search system the burden for coordinating all required input data on the that returns numerous related and helpful sections in modeler. Input dialog boxes that present the user with response to a typical search. all required data for a feature, or warning messages for certain missing data prior to execution would be helpful. Software Support • Lack of on-screen point-click-drag editing of model Questions directed to technical support are answered elements and objects. quickly and thoroughly by the author. While the website • Limitation of approximately 5000 equations in current states that anyone with a valid current license to 32-bit version of AnAqSim can limit its application in AnAqSim is entitled to support to ensure that AnAqSim is certain instances. functioning properly on your system, the reviewer found • Occasional lack of convergence; sometimes difficult to that support consistently exceeds this baseline, and is very track down source of problem especially for saltwater helpful in properly applying the software. interface solutions.

Figure 3. AnAqSim calculated transient drawdown curves matched against test data to estimate aquifer and aquitard hydraulic conductivity and storage coefficient values (system consists of middle aquifer zone that was pumped, separated by aquitards from upper and lower aquifer zones; observation wells in upper, middle, and lower aquifer zones).

NGWA.org GROUND WATER 5 Overall simultaneous use on up to six computers for 4 years Overall AnAqSim provides a new analytic element for $1090. Discounts are available for previous license modeling tool that combines a wide range of capabilities; holders of TWODAN or AnAqSim, and for academics. an ease-of-use factor that, while not at the simple end of The full AnAqSim software may be examined for a 1- the spectrum, is certainly commensurate with the rewards week free trial. of added capabilities and worth the learning curve; a suite of post-processing and analysis tools that is rich and well thought out to assist the groundwater analyst Our Mission in understanding the model results; and a price-point that The goal of Software Spotlight is to help readers iden- ensures its value. In its inaugural configuration it is a tify well-written, intuitive, and useful software. Indepen- highly useful and powerful analysis tool that, with the dent reviewers from government, industry, and academia addition of a few more features and enhancements, will try out full working versions of software packages and round out its already outstanding functionality. provide readers with a concise summary of their experi- ences and opinions regarding the capability, stability, and ease of use of these packages. Rankings The reviewer ranked the software’s capability, relia- bility, ease of use, and technical support on a scale of 1 References (worst) to 5 (best): Fitts, C.R. 2010. Modeling aquifer systems with analytic Capability: 4.0 elements and subdomains. Water Resources Research 46: Reliability: 4.2 W07521. DOI: 10.1029/2009WR008331 Haitjema, H.M., and O.D.L. Strack. 1985. An initial study of Ease of use: 3.8 thermal energy storage in unconfined aquifers. Technical Tech support: 5.0 Report PNL-5818 UC-94e, The Pacific Northwest National Laboratory, Battelle Memorial Institute, Richland, Wash- ington. How to Obtain the Software Jankovic, I., and R. Barnes. 1999. High-order line elements in modeling two-dimensional groundwater flow. Journal of The software can be downloaded from the vendor’s Hydrology 226: 211–223. web site at http://www.AnAqSim.com. One level of Strack, O., and I. Jankovic. 1999. A multi-quadric area-sink for license allows simultaneous use on up to two computers analytic element modeling of groundwater flow. Journal of (1 year for $235; 4 years for $545), while another allows Hydrology 226: 188–196.

6 GROUND WATER NGWA.org PROPOSED WAWA 5362 Model Assumptions

• Arbitrary land surface elevation of 10 ft • Average Groundwater elevation = 6 ft 1 (4 ft below land surface[bls]) • Site gradient = 0.000456 ft/ft Average of 2 & 3 • Predominant groundwater flow direction is to the northeast 1 • Surficial Aquifer thickness = 205 ft Average of 2 & 3 • Porosity = 0.28 Average of 2 & 3 • Horizontal Hydraulic Conductivity = 38.016 ft/day 1 , Vertical Hydraulic Conductivity = 3.8016 ft/day • Average Groundwater Velocity based on Darcy’s Law = 0.0619 ft/day

Domain Depth Horizontal Hydraulic Vertical Hydraulic Storativity Specific Yield (Layer) Conductivity (Kh) Conductivity (Kv) Main (1) 10 ft to -195 ft 38.016 ft/day 3.8016 ft/day 0.18 0.18 Upper (1) 10 ft to -15 ft 38.016 ft/day 3.8016 ft/day 0.18 0.18

Lower (2) -15 ft to -195 ft 38.016 ft/day 3.8016 ft/day 0.0269 0.0269

• Sheet piling to 25 bls was placed around the perimeter of the UST excavation area and simulated with zero flux. The dewatering points were modeled on the east, north, and west sides of the UST excavation with points placed inside and outside the sheet piling. Groundwater contours for 10 days of UST dewatering, 20 days of dispenser dewatering, and 10 days of sanitary sewer and exfiltration trenching are presented with particle tracking analysis. • Particle tracking analysis was simulated at the Marathon-Woolbright #613 (FACID# 50/9502819) located at 1610 S. Congress Ave in Boynton Beach to determine the extent of downgradient contaminant migration in relation to dewatering activities. Particle migration is assumed to be concurrent with groundwater flow and does not take into consideration the retardation, sorption, diffusion, or dispersion of the contaminant. Net particle migration of the contaminant plume is presented.

• 1. Site Specific Data from Phase II Environmental Site Assessment 2018 • 2. 7-Eleven 34790, Facility ID 50/8520561 • 3. Shell #1715, Facility ID 50/8513926 PROPOSED WAWA 5362 STEADY STATE MODEL GROUNDWATER CONTOURS (0.1 FT) PROPOSED WAWA 5362 10 DAY UST SIMULATION NET PARTICLE MIGRATION

MARATHON-WOOLBRIGHT #613 NET PARTICLE MIGRATION = 12.37 FT NORTH PROPOSED WAWA 5362 20 DAY DISPENSER SIMULATION NET PARTICLE MIGRATION

MARATHON-WOOLBRIGHT #613 NET PARTICLE MIGRATION = 2.16 FT NORTH PROPOSED WAWA 5362 10 DAY SANITARY SEWER AND EXFILTRATION TRENCHING SIMULATION NET PARTICLE MIGRATION

MARATHON-WOOLBRIGHT #613 NET PARTICLE MIGRATION = 1.23 FT NORTH