OPINION AND ORDER

I. INTRODUCTION

This is a consolidated multi-district litigation (“MDL”) relating to contamination — actual or threatened — of groundwater from various defendants’ use of the gasoline additive methyl tertiary butyl ether (“MTBE”) and/or tertiary butyl alcohol, a product formed by the breakdown of MTBE in water. In this case, the Commonwealth of Puerto Rico (“Commonwealth”) alleges that defendants’ use and handling of MTBE has contaminated, or threatened to contaminate, groundwater within its jurisdiction. Familiarity with the underlying facts is presumed for purposes of this Opinion.

Currently before this Court is a motion for summary judgment brought by defendants Shell Chemical Yabucoa, Inc. (“SCYI”), Shell Oil Company (“SOC”), Mo-tiva Enterprises LLC (“Motiva”), Equilon *281Enterprises LLC (“Equilon”), TMR Company (“TMR”), Shell Trading (U.S.) Company (“STUS”), Shell International Petroleum Company Limited (“SIPC”), and Shell Western Supply and Trading Limited (“Shell West”), pursuant to Rule 56 of the Federal Rules of Civil Procedure. Defendants (collectively, the “Shell Defendants”) move on the grounds that the Commonwealth cannot show that the “Shell Defendants were responsible for any site at issue in this case,” including Phase I Trial Site No. 3 (“Shell Site”), or “that [Shell Defendants] manufactured, supplied, or discharged any allegedly defective gasoline with MTBE that could have been a substantial factor in causing damages at ... any site in Puerto Rico.”'1 For the reasons' stated below, the Shell Defendants’ motion is GRANTED in part and DENIED in part with respect to the Commonwealth’s Phase I claims.

II. BACKGROUND2

While the instant motion argues that the Commonwealth cannot prove that the Shell Defendants caused the Commonwealth’s injuries, the central issue here, which also bears on causation, is whether the Commonwealth has produced evidence that the Shell Defendants manufactured, supplied, or distributed gasoline containing MTBE. This question turns largely on whether supplying gasoline with MTBE concentrations below 0.5Q% by volume (“the de min-imis threshold”) is permissible as a matter of Puerto Rico law.3 As a matter of undisputed fact, SCYI, Motiva, Equilon, TMR, and STUS never manufactured, distributed, sold, or imported shipments of gasoline containing concentrations of MTBE greater than the de minimis threshold.4

A. The He Minimis Threshold

. MTBE is an oxygenate — an octane enhancing substance — that gasoline manufacturers began using as an additive to replace lead.5 Manufacturers typically blended MTBE into their product at concentrations between 1% and 7% by volume, but some refineries used MTBE at concentrations as high as 10% to 12% by volume.6 Because MTBE loses its octane enhancing qualities at concentrations lower than 1% *282by volume, the Shell Defendants claim that it would “never make sense for a refiner to blend” MTBE into gasoline at concentrations.below 0.50% by volume.7

Pursuant to Section 4172 of Title 10 of the Puerto Rico Code (“Section 4172”), “[n]o natural or legal person shall import, sell, dispense or offer for sale gasoline containing [MTBE].”8 Through Section 4175 of Title 10 of the Puerto Rico Code (“Section 4175”), the Puerto Rico Legislature delegated 'the task of enforcing this “statutory" ban on MTBE” to the Department of Consumer Affairs (“DACO”).9 “Correspondingly, DACO implemented Regulation No. 8198 (“DACO regulation”) to further illustrate [section 4172].”10 By implementing the DACO regulation, and issuing Administrative Order No. 2012-020 (“DACO order”) to supplement it, “DACO takes the position that gasoline coming into Puerto Rico is allowed to [contain] MTBE ..., but [only] at levels below 0.5[0] percent by volume.”11

The Shell Defendants argue that Puerto Rico law “expressly permitís] de minimis levels of MTBE up to 0.5[0]% by volume.” 12 Such levels of MTBE in gasoline, the Shell Defendants claim, are “inevitable,” and “most likely result[] from the presence of MTBE in some components of the refining or distribution systems ... which inadvertently mixes with [MTBE-free] gasoline.”13 Accordingly, the Shell Defendants ask this Court to grant summary judgment on all claims based on the presence of “mere de minimis levels of MTBE in gasoline.”14

The Commonwealth counters that the Shell Defendants “confuse the law banning MTBE with [the] DACO regulation implementing the law.”15 “DACO did not purport to change the ban [articulated by section 4172] or permit de minimis levels of MTBE,” the Commonwealth argues.16 Rather, DACO passed a .regulation and order in its exercise of “prosecutorial discretion in carrying out laws and determining when and whether to enforce and impose fines and penalties.”17 The Commonwealth relies on the declaration of its expert, Luis Pagan Rodriguez — the Special Assistant to the Secretary of DACO — to support its ultimate conclusion that “there is no acceptable level of *283MTBE” permissible in gasoline “[u]nder the statutory laws of Puerto Rico” — section 4172 “bans MTBE[,] period.”18 In his declaration, Pagan stated that the DACO regulation and order were promulgated because “DACO recognized that residual levels of MTBE might be present due to the commingling of product in barges.”19 However, he stated that DACO’s policy of nón-enforcement with respect to gasoline with MTBE concentrations below 0.50% does not change the fact that manufacturers of such gasoline still violate the plain language of section 4172, and therefore Puerto Rico law.20

The Shell Defendants move to strike Pagan’s declaration pursuant to the “sham issue of fact” doctrine on the ground that Pagan’s declaration “flatly contradicts pri- ■ or deposition testimony.” 21 At this deposition, Pagan was asked why DACO decided to implement a “level of tolerance to MTBE in gasoline coming into Puerto Rico” and why that level was set at 0.50% MTBE by volume?22 His answers to both questions were, “I do not know.”23 He stated that he is “not an expert” with respect to why DACO implemented a level of tolerance of MTBE.24

B. Sol Puerto Rico Limited f/k/a Shell Company (P.R.) Limited

From 1947 until June 2006, the Shell Company (P.R.) Limited (“Shell PR”) was “part of the • international web of Shell owned, and operated companies.”25 By 2006, Shell PR owned and operated seventy-two “Shell-branded service .stations in Puerto Rico, including the underground storage tanks (“USTs”) and. dispensing equipment located at the stations.”26 Shell PR also “leased bulk storage tanks at Cataño-Terminal (“Cataño”), located just outside of .San Juan.”27 Cataño was used as a facility where Shell PR received shipments of gasoline, at least some of which was Shell-branded.28

. On June 13, 2006, Sol Investments' Limited “acquired all of the stock of [Shell PR] ... and subsequently changed [its] name to Sol Puerto Rico Limited (“Sol”).”29 Upon acquisition, Sol assumed ownership, operation, or leasing obligations for all seventy-two Shell-branded gasoline stations.30 Sol also acquired Cataño, where it continued to receive shipments of gasoline from several Shell Defendants.31 The shipments of gasoline received at and distributed from Cataño, by both Shell PR and Sol, contained varied levels of MTBE— *284including several shipments of gasoline containing MTBE at levels above the de minimis threshold.32

The parties dispute whether “liability and responsibility ... for the operations of [Shell PR],” if proven, may be allocated to Sol via a contractual agreement between those entities.33 The Shell Defendants claim that “Sol is responsible for any liability that is attributable to Shell PR.”34 The Shell Defendants point to the acknowledgment by both Sol and the Commonwealth that Sol “bears liability for claims associated with ‘ownership or operation of Shell-branded stations in Puerto Rico.”35 However, the Commonwealth claims that-“the contractual agreement among the Shell Defendants and Sol as to the allocation of liability arising from MTBE contamination does not shield the Shell Defendants from liability to the Commonwealth for [Shell PR]’s own torts.”36 Rather, the Commonwealth argues that the Shell Defendants are “directly liable for their own conduct in supplying MTBE gasoline to Shell PR, failing to warn Shell PR about the environmental risks of MTBE, and failing to ensure ... [Shell PR] undertook appropriate precautions to prevent releases from USTs.”37

C. Remaining Shell Defendants

The Commonwealth asserts six claims in its Complaint against certain Shell Defendants.38 These claims include: strict products liability under a theory of defective design and failure to warn (Count I) asserted against SOC, SCYI, SIPC, and Shell West;39 negligence (Count IV) asserted against SOC, SCYI, SIPC, and Shell West;40 Environmental Public Policy Act (“EPPA”) violations. (Count V) asserted against SOC, SCYI, SIPC, and Shell West;41 public nuisance claim (Count II) *285asserted against SIPO;42 trespass claim (Count III) asserted against SIPC;43 and Toxic Substance Control Act (“TSCA”) violations (Count VII) asserted against SOC.44

1. SCYI

SCYI is a Puerto Rico corporation, “formed in 2001 to acquire and operate” the Yabucoa Facility (“Yabucoa”) — “an existing petrochemical plant and refinery” located in' Puerto Rico.45 SCYI also imported gasoline shipments to Cataño.46 MTBE gasoline was never “manufactured or stored ... at [either] Yabucoa” or Cataño, nor did SCYI own or operate any service stations in Puerto Rico.47 However, records documenting the quality of gasoline received at Yabucoa and Cataño between 2002 and 2010 show that SCYI imported shipments of gasoline containing MTBE at concentrations below the de minimis threshold.48 Specifically, MTBE ranging in concentrations between 0.02% to 0.17% by volume was detected in eight shipments of gasoline received at Yabucoa between 2002 and 2010, and MTBE at concentrations of 0.11% and 0.21% by volume were detected in two shipments received at Ca-taño in 2004.49

2. SOC

SOC is based in the United States and “does not own or operate any facilities to make, store, or distribute gasoline, including refineries, terminals, distribution systems and service stations [] in Puerto Rico, nor has it ever done so.”50 However, the Commonwealth claims that SOC owned and operated two oil refineries that produced and directly shipped MTBE gasoline to Puerto Rico.51 In addition, the Commonwealth claims that SOC exercised control over “core elements” of Shell PR’s daily operations in Puerto Rico.52 Furthermore, the Commonwealth asserts that SOC failed to comply with requirements set forth by the TSCA.53

a. Supply of MTBE Gasoline

SOC owned the Norco Refinery (“Nor-co”), located in Louisiana.54 The parties disagree with respect to when SOC owned Norco.55 The Commonwealth claims SOC first acquired Norco in 1992 and owned it until 1998, when it transferred ownership to another Shell .Defendant, but the Shell Defendants contend, SOC owned Norco only until 1996.56 Notwithstanding this factual dispute, “Norco Batch Report Charts [ (“Norco Batch Report”) ] confirm. *286that [ ] Norco manufactured both conventional gasoline with MTBE and conventional gasoline without MTBE” between 1992 and 1998.57 However, Norco provided, at most, six shipments of gasoline to Shell PR and the Norco Batch Report does not provide any evidence showing that those shipments contained even trace amounts of MTBE,58 Rather, the Commonwealth presents circumstantial evidence, to support its claim that it is more likely than not that the gasoline received by Shell PR from Norco contained MTBE at concentrations greater than the de minimis threshold;59

SOC is also the “general partner” of Deer Park Refining L.P., which operates a refinery (“Deer Park”) in Texas.60 Between 2002 and 2008, Deer Park supplied twenty-two shipments of gasoline to SCYI, received at Yabucoa, pursuant to a supply contract.61 According to the terms of the contract, SOC was “specifically prohibited” from shipping gasoline with MTBE concentrations above the de minimis threshold.62 Of the twenty-two shipments of gasoline- received by SCYI at Yabucoa from Deer Park, two shipments contained MTBE at concentrations below the de minimis threshold.63

b. Involvement in Chain of Distribution

The Commonwealth claims that a division of SOC — Shell Atlantic Services Company (“Shell Atlantic”) — conducted and approved all supply contracts with Amerada Hess (“Hess”), on behalf of Shell PR, for twenty-three shipments of gasoline produced at Hess Oil Virgin Islands Company’s (“HOVIC”) St. Croix refinery, (“St. Croix”), to be sent to Cataño between 1995 and 1997.64 The concentrations of MTBE in these gasoline shipments ranged from 0.17% to 8.9%.65 It is not alleged, nor is there any evidence to show, that Shell *287Atlantic ever took title to these- shipments.66

Ivan Cintron, the former Shell PR employee responsible for “spot purchases,” testified with respect to Shell Atlantic’s involvement in the negotiation and finalization of supply contracts between Shell PR and Hess.67 Cintron ’testified that Hess initiated supply contract discussions when Hess representatives called him and asked if Shell PR would be interested in purchasing gasoline.68 Following this conversation, Cintron “immediately” contacted' Shell Atlantic’s headquarters in Houston.69 Cintron testified that, as Shell PR’s spot purchaser, he was ■ required ■ to contact Shell Atlantic because Shell Atlantic “inspect[s] the tankers” used for import to Puerto Rico to determine that they are “suitable transport carriers.”70 Cintron testified that he communicated with Shell Atlantic with respect to supply issues “almost every week.”,71

The Commonwealth argues that Shell Atlantic’s approval was required.for the supply contract between Hess and Shell PR to come to fruition, placing Shell Atlantic squarely within the “chain of [distribution] for [MTBE] gasoline delivered to [Puerto Rico].”72 The Commonwealth references correspondence between Hess and Shell Atlantic that make clear that Shell Atlantic “negotiated for substantial supply of [MTBE] gasoline from Hess for Shell PR.”73

By contrast, the. Shell Defendants accuse the Commonwealth of overstating Shell Atlantic’s role in negotiating and finalizing supply contracts between Hess and Shell PR, insisting that Shell Atlantic was merely'contacted to inspect the quali-. ty of the tankers used for transporting gasoline shipments.74 Significantly, it is undisputed that Shell Atlantic never took title to the relevant shipments.75 Accordingly, the Shell Defendants argue that Shell Atlantic’s role in the transactions between Hess and Shell PR is best described as that of a “broker,” and therefore hot within the “chain of distribution.” 76

c. The TSCA Claim

The Commonwealth alleges that SOC “has been in violation of TSCA for decades” due to its failure to disclose “ ‘information which reasonably supports the conclusion that’ MTBE and MTBE gasoline ‘presentí ] a substantial risk of injury to health or the environment’ ” to the Administrator of the Environmental Protec*288tion Agency (“EPA”).77 Specifically, the Commonwealth claims that SOC failed to disclose information relating to MTBE’s potential to “create taste and odor problems in public drinking water supplies,” which SOC knew following the release of MTBE gasoline in Rockaway, New Jersey in 1981 (“the Rockaway spill”).78 SOC disclosed to the American Petroleum Institute — but not to the EPA — that “MTBE was detectable (by drinking) in 7 to 15 parts per billion (“ppb”) so even if [there was no health effect], it still had to be removed to below the detectable amount in order to use the water.”79 Moreover, the Commonwealth accuses SOC of misleading the EPA by using its position as a participating member on the Oxygenated Fuel’s Association’s MTBE Committee — a committee “organized to submit comments in response to an EPA notice announcing its intention to designate MTBE for priority testing consideration under TSCA” — to proffer the false conclusion that “MTBE does not represent a drinking water hazard.”80

The Shell Defendants claim that the EPA, “pursuant to its authority under TSCA,” had access to information documenting Rockaway’s “experience with MTBE, including taste and odor issues” as of 1987 when it compiled a docket of materials including an article published in the Journal of the American Water Works Association co-authored by the Rockaway Township engineer.81 This article provided details with respect to precise threshold levels at which MTBE altered the taste and odor of water in Rockaway’s wells.82 Furthermore, the Shell Defendants counter that SOC did not “mislead” the EPA as a member of the MTBE Committee — rather, because of “significant confusion,” SOC understood MTBE’s taste and odor threshold “to be in the range of 700 ppb.”83 Accordingly, the Shell Defendants argue that the EPA was “adequately informed” for purposes of section 8(e).84

3. SIPC

SIPC is a “U.K. company” that has never owned any refining or manufacturing facilities in Puerto Rico.85 The Commonwealth claims that one of SIPC’s subsidiaries — Shell International Trading Company (“SITC”) — supplied Shell PR with substantial amounts of MTBE gasoline.86 Furthermore, the Commonwealth claims that SIPC — through its subsidiary Shell Retail International (“Shell Retail”) and alleged subsidiary Shell Caribbean and Central America (“SCCA”) — “played a substantial role in controlling [Shell PR’s] site specific activities and policies related to [USTs], *289environmental compliance, and budgeting for environmental and engineering projects,” such that SIPC was “a substantial factor in causing MTBE contamination throughout the Commonwealth.”87

a. Supply of MTBE Gasoline

From February 1988 until at least 1995, SITC supplied Shell PR with gasoline produced at Petróleos de Venezuela S.A.’s (“PDVSA”) Curasao refinery (“Curagao”), pursuant to an “evergreen contract.”88 It is undisputed that gasoline containing MTBE at concentrations above the de minimis threshold was produced at Cura-gao and shipped to Shell PR at Cataño.89 However, there is no direct evidence showing that SITC provided such gasoline to Shell PR.90 Further, the evergreen contract permitted, but did not require, the presence of MTBE.91

The Commonwealth also alleges that, after 1994, SIPC supplied Shell PR with “substantial volumes of MTBE gasoline” produced at St. Croix.92 However, HOVIC Supply Data neither indicates that SIPC was a party to the transaction, nor does it show that SIPC ever 'held title to the shipments of gasoline at issue.93 Consequently, the Shell Defendants claim that the Commonwealth “fail[s] to identify any evidence of agreements between HOVIC and [SIPC] for the supply of gasoline to [Shell PR].”94

b. SIPC’s Involvement with Shell PR Daily Operations

The Commonwealth claims that, beginning in 1999, SIPC’s “direct involvement with” Shell PR’s daily operations, shows that “Shell PR and [SIPC] acted as one coherent confidential business organization with ultimate decisionmaking authority and control with [SIPC].”95 As a result, the -Commonwealth concludes that SIPC effectively owned, or operated the seventy-two Shell-branded service stations in Puer-to Rico and was a “substantial factor” in causing MTBE contamination.96 Accord*290ingly, SIPC should be assigned all liability attached to Shell PR from 1999 until 2006.97 The Commonwealth relies on the activities .of Shell Retail and SCCA, a SIPC subsidiary and SIPC affiliate respectively,- as evidence that SIPC “exercised substantial control” over Shell PR operations.98

Fir'st, in January 1999, Shell PR entered into a Franchise Agreement with Shell Retail,99 In accordance with the Franchise Agreement, ■ Shell ■ PR “agreed to comply with certain core elements” of Shell Retail’s operation standards, including-its “[Health, Safety, and Environment (“HSE”) ] core, standards and adherence to ... performance specifications of equipments and systems.”100 Furthermore, the terms of the agreement also required Shell Retail to “provide ‘comprehensive advice and business support for products and services’ regarding ‘[ejngineering design’ and ‘[s]ite operations and training.’ ”101

Second, in accordance with the Franchise Agreement, SCCA was responsible for “advising all of the business in the [Caribbean and Central American] cluster with respect to their retail stations” — including Shell PR.102 SCCA was responsible for “working with”, retail stations to ensure compliance with “SIPC’s Shell-wide policies regarding various issues, including environmental policies.”103 Among other things, the Commonwealth claims that Shell PR’s “capital projects ... need[ed] approval [from SCCA] in order to have the expenditures.”104 For instance, in 2000 and 2001, Shell PR “had to seek approval from [S]CCA to upgrade [USTs] at Shell stations, including [Site 3].”105

The Shell Defendants contest this claim on several grounds. As an initial matter, the Shell Defendants argue that the Commonwealth should be estopped from asserting that “[SIPC] is vicariously liable for [the] operations of Shell PR” because the Commonwealth “neither pled any' such theory of liability and never disclosed such a theory in response to Defendants’ First Set of Contention Interrogatories.”106 Furthermore, the Shell Defendants claim that, even if the Commonwealth’s assertion of vicarious liability was not estopped and its characterization of SIPC’s role in Shell PR’s operation were accurate — which the Shell Defendants maintain it is not — the Commonwealth’s argument fails because SIPC did not exercise control over Shell PR as a matter of law.107

*2914. Shell. West ..

Shell West is a Barbados company that has “never owned or operated any underground storage tanks, service stations, or other gasoline storage facilities in Puerto Rico.”108 However, “between September 1997 and December 2010, Shell West supplied five-hundred-sixteen shipments of gasoline to [Shell PR] and one-hundred-forty shipments of gasoline to SCYI,” mainly from St. Croix.109 At least ten gasoline shipments provided to Shell PR contained MTBE at concentrations greater than the de minimis threshold of 0.50%.110 Shell West purchased these shipments from Hess, briefly acquiring title or ownership to the shipments.111 Soon after purchasing these shipments, Shell West sold the shipments to Shell PR — title always transferred to Shell PR “outside of Puerto Rico, typically at the loading dock of [St. Croix].”112

The Commonwealth claims that a finder of fact could reasonably conclude 'that Shell West purposefully added MTBE to gasoline at concentrations greater than the de minimis threshold because it was permitted by Shell West’s -supply contracts and consistent with Shell West’s business practices.113 Conversely, the Shell Defendants dispute that Shell West-“supplied” Shell PR and SCYI with MTBE gasoline.114 Rather, the Shell Defendants claim they “merely helped make [MTBE gasoline] available' outside Puerto Rico and thus should not be said to have participated in the Puerto Rico MTBE gasoline market.”115 Accordingly, the Shell Defendants argue that ■ Shell West “was the equivalent of just a broker.”116

Separately, the Shell Defendants trumpet a lack of causation, claiming that there is “no evidence” that any gasoline from the ten shipments with MTBE concentrations above 0.50% by volume “was ever delivered to any Trial Site ... at issue” or that this gasoline “was discharged, much less that a discharge of the product caused the [Commonwealth] any damages.”117

III. LEGAL STANDARD

Summary judgment is appropriate “only where, construing all the evidence in the light most favorable to the non-movant and drawing all reasonable inferences in that party’s favor, there is ‘no *292genuine issue as to any material fact and ... the movant is entitled to judgment as a matter of law.’ ”118 “A fact is material if it might affect the outcome of the suit under the governing law, and an issue of fact is genuine if the evidence is such that a reasonable jury could return a verdict for the nonmoving party.” 119

“[T]he moving party has the burden of showing that no genuine issue of material fact exists and that the undisputed facts entitle [it] to judgment as a matter of law.”120 To defeat a motion for summary judgment, the non-moving party must “do more than simply show that there is some metaphysical doubt as to the material facts,”121 and “may not rely on conclusory allegations or unsubstantiated speculation.”122

In deciding a motion for summary judgment, “[t]he role of the court is not to resolve disputed issues of fact but to assess whether there are any factual issues to be tried.”123 “‘Credibility determinations, the weighing of the evidence, and the drawing of legitimate inferences from the facts are jury functions, not those of a judge.’ ”124

IV. APPLICABLE LAW

A. Essential Elements of the Tort Claims Under Puerto Rico Law

Almost all of the Commonwealth’s claims require proof that the Shell Defendants actually supplied or discharged MTBE or gasoline containing MTBE, in Puerto Rico.125 Under Puerto Rico Law, “tort plaintiffs .... must introduce evidence which affords a reasonable basis for the conclusion that it is more likely than not that the conduct of the defendant was a substantial factor in bringing about the result.”126 Courts have held that a defendant’s conduct “could only have been a *293substantial factor if it played more than an infinitesimal or theoretical part in bringing about” injury, damage, or loss.127 As I recently held, this burden can be met with circumstantial evidence, but mere “speculation, unmoored from the record before the Court, is insufficient.”128

The act of supplying or discharging gasoline — proof of which is necessary to sustain the Commonwealth’s, tort claims — can also be established by showing that the defendant was within the “chain of distribution.” A defendant is within the chain of distribution of MTBE gasoline when it manufactures, sells, or distributes MTBE gasoline, or when it owns and/or operates a service station dispensing MTBE gasoline.129 Whether a “broker”— a party that “facilitat[es] a transaction between seller and purchaser” without holding title to the product — is within the chain of distribution is a-more difficult determination.130 In Oscar Mayer Corp. v. Mincing Trading Corp., the District of New Jersey held that a “broker” cannot be “strictly liable in tort,” because a broker is not “in a position to éxert pressure to ensure the safety of the product.”131 Although this case involved the interpretation of New York and New Jersey law and pertains to strict products liability law, its guiding principles are relevant here. Where a party takes title to a product — for however long — and “act[s] in its own name and as an independent legal entity,” that party “transcend[s] the role of a mere broker.”132 • However, where a defendant has not taken title -to the product, the Commonwealth must point to some intentional and affirmative act that places the defendant within the chain of- distribution for MTBE gasoline in Puerto Rico.133

B. Disclosure Under the Rules of Civil Procedure

In the Southern District of New York, contention interrogatories “are designed to assist parties in narrowing and *294clarifying the disputed issues in advance, of summary judgment practice or trial”134 “A party answering a contention interrogatory is obligated to respond truthfully and completely.”135 Contention- interrogatories are treated as judicial, admissions which usually estop the responding party from later asserting positions not included in its answers, “unless the failure was substantially justified or is harmless.”136 Failure to amend a contention.interrogatory pursuant to Federal Rule of Civil Procedure 26(e) can bar use of a theory -of liability, especially when such failure results in prejudice to the adverse.party.137 However, prejudice , is not required for preclusion under Rule 37(c)(1), nor does Rule 37(c)(1) require a showing that the omission was made in bad faith.138

C. The TSCA Claim

- The TSCA authorizes any person — including the Commonwealth — to “commence a civil, action against violators.” 139 Sections 2607(e) and (f) (“section 8(e) and 8(f)”) of-Title 15 of the United States Code articulate the obligations of a chemical manufacturer, and distributor under the: TSCA. In relevant part, section 8(e) states that a

person who manufactures, processes, or distributes in commerce a chemical substance or mixture and who obtains information which reásonably supports the conclusion that such substance or mixture presents a substantial risk of injury to health or environment must immediately inform the [EPA] Administrator.

To sustain its TSCA claim, the Commonwealth must “prove by a preponderance of the evidence that defendants ‘obtained information which reasonably supports the .conclusion that such substance or mixture ... presents a ¡Substantial risk of injury to health or environment.’ ”140 Once this *295prong is satisfied, “the defendants [must prove] by preponderance of the evidence that they had ‘actual knowledge that the, Administrator ha[d] been adequately informed of such information.’ ”141 “There are several kinds of information about which the [EPA] considers itself to be adequately informed for purposes of section 8(e)” including information “published in the open scientific literature.”142

Section 2615(a) of Title 15 of the United States Code (“section 14(a)”) gives the EPA a cause of action to seek damages from violators of the TSCA in the amount of up to $25,000 per violation. However, the TSCA also confers standing upon “any person [to] commence a civil action against any person ... who is in violation of [the TSCA]” through its citizen suit provision — 2619(a) of Title 15 of the United States Code (“section 20(a)”). While the EPA is entitled to damages when it brings an action under section 14(a), “the TSCA only authorizes citizen suits ‘to restrain’ violations of its substantive provisions.”143 In other words, plaintiffs bringing suit under section 20(a) are limited to injunctive relief for ongoing violations.144

Y. DISCUSSION

A. Claims Predicated on Gasoline Containing De Minimis Levels of MTBE Cannot Survive Summary

Judgment

The central disagreement presented in defendants’ motion relates to whether the Shell Defendants who supplied and distributed gasoline with de minimis levels of MTBE can be held liable. To resolve this disagreement, the parties have offered different interpretations of the Puerto Rico regulatory scheme governing MTBE and MTBE gasoline.145 These arguments are also the subject of & motion to strike, in which the Shell Defendants contend that Pagan’s declaration contradicted his prior deposition testimony, in which he all but admitted that distributing and importing gasoline with de minimis amounts of MTBE was permissible ■ under Puerto Rico law.146

First, reading Pagan’s declaration together with his deposition testimony reveals the strength of the Shell Defendants’ position. There is little question that his declaration — in which he maintains that he “does not know” ... — completely contradicts his sworn statements at his prior deposition. Because he expresses ignorance on the question in his declaration, I will rely on his deposition testimony in deciding how to assess the regulatory scheme governing MTBE content in gasoline.147

*296Second, Puerto Rico’s regulatory scheme is similar to that found in several states which address the inevitability that even MTBE-free gasoline will ultimately commingle with MTBE particles throughout the production, importation, and distribution process.148 In establishing a de min-imis threshold, the government’s goal is to ensure that the importation of gasoline to Puerto Rico is not discouraged by section 4172’s blanket prohibition on the use of MTBE. DACO’s decision to set 0.50% as the de minimis threshold distinguishes gasoline that contains MTBE as the result of intentional blending, from gasoline that has unintentionally and inevitably commingled with residual MTBE particles.149 After all, MTBE does not serve its intended octane enhancing purpose at such low concentrations.150 Furthermore, this regulation provides notice to parties, in the chain of distribution of gasoline in Puerto Rico as to what quality of product satisfies Puerto Rico law.

To be sure, compliance with a regulatory guideline is not dispositive of liability, or lack thereof, for supplying or discharging gasoline containing MTBE. However, courts can consider compliance as a factor in determining whether to impose liability.151 Further, while Puerto Rico statutory law prohibits the discharge of MTBE of any amount, the law is also clear that “conduct that plays nothing more than an infinitesimal or theoretical part in bringing about” an injury, cannot sustain a tort claim.152

The discharge of gasoline containing de minimis levels of MTBE plays, at best, nothing more than a minimal role in contributing to the Commonwealth’s injury. The Commonwealth has not furnished the Court with enough evidence to the contrary to survive summary judgment with respect to de minimis based- claims. In fact, the evidence shows that the Commonwealth’s own regulatory scheme was designed to permit, perhaps even encourage, defendants to supply gasoline with trace levels of MTBE to the island of Puerto Rico.153 For these reasons, the Commonwealth’s tort claims that are based solely on the shipment of gasoline with MTBE content measured below the de minimis threshold fail as a matter of law.154

B. SOC Is Entitled to Summary Judgment on All Phase I Claims

The Commonwealth asserts claims of nuisance, trespass, and violation of the EPPA against SOC based on two theories of liability. First, the Commonwealth claims that SOC supplied Shell PR and SCYI with substantial amounts of gasoline from its Deer Park and Norco refineries.155 *297With respect to the gasoline produced at Deer Park, it is undisputed that MTBE was only detected in two shipments, and at levels well below the de minimis threshold.156 The Commonwealth fails to provide any direct evidence to support its claim that Norco supplied Puerto Rico with gasoline containing any amount of MTBE.-While the Norco Batch Report shows that Norco did use MTBE in high concentrations in some batches of gasoline, 155 of the 187 batches documented in the Norco Batch Report contained either de minimis amounts of MTBE or none at all.157 The remaining 32 batches had MTBE levels greater than the de minimis threshold. However, the Commonwealth has no evidence that any of those 32 batches actually reached Puerto Rico.

In fact, all that the Commonwealth offers is the testimony of Shell declarant and witness Patrick Bloomer, who testified that he did not know which batches of gasoline produced at Norco were shipped to Puerto Rico because the Norco Batch Reports did not provide enough detail.158 No reasonable jury could find, as the Commonwealth argues, that Bloomer’s testimony is a “concession” that “some or all of the gasoline containing MTBE produced at Norco was potentially shipped to Puerto Rico.”159 Rather, Bloomer’s testimony illustrates the deficiency of evidence in the record — direct or circumstantial — that supports the Commonwealth’s assertion that SOC shipped gasoline containing substantial amounts of MTBE from Norco to Puerto Rico.

Second, the Commonwealth claims that Shell -Atlantic, a subsidiary of SOC, supplied Shell PR with MTBE gasoline— registering MTBE above de minimis levels — produced by HOVIC at St. Croix.160 Shell Atlantic was a broker to this transaction as it never held title to these gasoline shipments.161 However, the Commonwealth alleges that Shell Atlantic is in the chain of distribution because it functionally operated as Shell PR which purchased these shipments of MTBE gasoline.162 Specifically, the Commonwealth claims that Shell Atlantic negotiated and finalized two contracts resulting in the supply of MTBE gasoline from St. Croix to Shell PR.163

However, as a matter of law, Shell Atlantic’s conduct cannot place it in the chain of distribution. The evidence in the record shows that Shell Atlantic only arranged the shipment of the gasoline — it did not have any role in determining the concentrations of the various additives Hess blended into the product, including MTBE. 164 Thus, the Commonwealth’s conclusions regarding Shell Atlantic’s transactions with Shell PR are speculative. The Commonwealth must prove that Shell Atlantic “transcended] the role of a mere broker.” 165 The Commonwealth has failed to provide sufficient proof to withstand a motion for summary judgment.

*298The Commonwealth .also, asserts a TSCA claim against SOC for failing to disclose “substantial risk information” about MTBE’s detectability in water (by taste) being 7 to 15 ppb — information which SOC attained in 1981 following the Rockaway spill.166 However, the EPA has been in possession of or had access to the same “substantial risk information” since 1987. The Rockaway Article not only stated that water containing MTBE at thresholds greater than 7 to 15 ppb is not potable, but it also provided substantial detail in illustrating the impact of MTBE in Rockaway and the surrounding area. Because the TSCA only authorizes citizen suits “to restrain” defendants allegedly in violation of the TSCA’s provisions from committing ongoing violations, the Commonwealth’s TSCA claim fails as a matter of law.

C. SIPC Is Entitled to Summary Judgment on All Phase I Claims

The Commonwealth asserts nuisance, trespass, and EPPA claims against SIPC, offering two rationales. First, the Commonwealth claims that SlPC’s subsidiary, SITC, supplied Puerto Rico with substantial amounts of MTBE gasoline from St. Croix and Curagao.167 As an initial matter, the Commonwealth’s claims based on SlPC’s supply of gasoline from St. Croix lack factual foundation — not only is there no evidence showing the MTBE content in the'relevant shipments of gasoline, but there is also no evidence showing that SIPC was even a party, let alone a broker, to this transaction. Likewise, there is no evidence showing that the gasoline shipped from- Curagao to Shell PR was. MTBE gasoline.168 That the evergreen contract governing the supply of gasoline between SITC and Shell PR allowed gasoline containing MTBE concentrations of 10.% does not show that it is more likely than not such gasoline .contained MTBE above the de minimis threshold.169 The contract did not require that Curagao blend 10% MTBE in the finished product. • By the terms of the contract, it is equally probable that the gasoline produced at Curagao and shipped by SITC to Shell PR contained no MTBE.

Second, the Commonwealth claims that between 1999 and 2006, SIPC exercised ultimate decision making authority and control over core functions of Shell PR such that it effectively operated the seventy-two Shell-branded service stations, including the USTs, in Puerto Rico.170 The Commonwealth did hot mention a vicarious liability theory in any way in its response to the Contention Interrogatories, nor did it amend its contentions to reflect this theory.171 The Commonwealth has not shown that this omission was harmless or provided a justification for it. Accordingly, the Commonwealth cannot pursue its theory of vicarious liability.172

. D. Shell West Is Not Entitled to Summary Judgment

The Commonwealth ■ alleges that Shell West is liable for nuisance, trespass, and violation of the EPPA for supplying *299Shell PE with substantial amounts of MTBE gasoline.173 While it is undisputed that ten shipments of gasoline that Shell West provided contained MTBE levels above the de minimis threshold, the Shell Defendants claim that the' Commonwealth fails to meet both its chain of distribution and causation requirements.174 The Shell Defendants argue that Shell West was merely a broker — that Shell West played a middle man role in Hess’s sale of MTBE gasoline, produced at St. Croix, to SCYI and Shell PR. This argument is unavailing. Shell West purchased the shipments of gasoline directly from St. Croix, before selling them directly to SCYI and Shell PR.175 Such activity places Shell West squarely within the chain of distribution.

The Shell Defendants argue that even if Shell West supplied Shell PR with ten shipments of gasoline containing greater than de minimis levels of MTBE that was intended for distribution in Puerto Rico, the Commonwealth cannot show that this gasoline leaked from USTs and caused the Commonwealth injury. While the chain of causation is rather tenuous, ten shipments of gasoline could have contained a massive amount of defective product — one shipment of gasoline typically contains as many as 100,000 barrels.176 Consequently, a reasonable jury could find, based on the sheer volume of gasoline potentially distributed in those shipments, that it is more likely than not that Shell West’s supply of MTBE gasoline was a substantial factor in bringing about the Commonwealth’s injury.177

VI. CONCLUSION

For the foregoing reasons, the Shell Defendants’ motion for summary judgment is GRANTED in part and DENIED in part.178 In addition, the Shell Defendants’ motion to strike the Pagan Declaration is GRANTED. The Clerk of Court is directed to close these motions (Docket Nos. 467 and 538).

SO ORDERED.