3. isiku vastus

THIS IS A GOOGLETRANSLATION FROM ENGLISH TO ESTONIAN Keda see puudutada võib, Käesolevas kirjas kommenteeritakse “Kolmanda isiku” EKOGRID Oy nimel Pinnasepuhasatuse OÜ poolt EKOGRID Oy ja EKOGRID Tehnoloogia kohta Riigi Kinnisvara hankes nr 287358 esitatud pretensioone. Kommenteerime Tepperi ja Partnerite poolt 10.02.2025 tehtud “VAIDLUSTUS hankes viitenr 287358” tehtud nummerdatud punkte. Punkt 7. EKOGRID Oy teeb koostööd kohaliku partneri MAVES OU-ga, et viia läbi EKOGRID süsteemi paigaldus projektikohta. Artto Pello MAVES OU-st on varem koos operatiivjuhi Iisak Lusuaga EKOGRID Oy-st Eestis mitmeid paigaldusprojekte teostanud. Tavaliselt teeb ruudustiku projekteerimise EKOGRID ja paigalduse teostab MAVES OU. Mõlemal ettevõttel on laialdased kogemused saastunud pinnase ja saastunud projektialade saneerimise ning nõustamise alal. EKOGRID-tehnoloogia on ainulaadne kõrgtehnoloogiline meetod saastunud pinnase ja põhjavee puhastamiseks, võrreldes traditsiooniliste kaevamis- ja puistamismeetoditega ei ole see töömahukas. See tähendab, et tervendamisprojekt nõuab projekti personali kohapeal ainult paigaldamise ja kasutuselevõtu ajal. Tervendamise jälgimine toimub proovide võtmise teel kokkulepitud ajavahemike järel ning Süsteemi monitooring toimub kaugjuhtimisega Helsingis asuvast EKOGRIDi kontorist. EKOGRIDi töötajad külastavad kokkulepitud ajavahemike järel koos MAVES Staffiga süsteemi mõõtmisi. Punkt 10. EKOGRID Tehnoloogiat saab tõhusalt hinnata tänu saneerimisprotsessi kõrgele automatiseeritusele. Nagu varem mainitud, ei ole parandusprotsess töömahukas. EKOGRID-süsteemi paigaldus, mõõtmiste kohapealsed külastused ja proovide võtmine nõuavad kõige rohkem kohapealset tööjõudu. Muul juhul on seire- ja heastamisprotsess automatiseeritud. Hinnad sisaldavad paigaldust ja demonteerimist, materjale, objektikülastusi ja EKOGRID süsteemi kuurenti. Punkt 11. Heastamismeetodi kirjeldus on pakkujale edastatud. Allpool on lühike kirjeldus: EKOGRID™ täiustatud bioremediatsiooni protsessid on aluseks kõikidele projektidele, milles osaleme. Rakendused hõlmavad tervendamist ainult EKOGRID™ süsteemiga ja koos teiste tervendamislahendustega. EKOGRID™ lahust saab kasutada ka bioremediatsiooni toetavate ainete ülekandmiseks sihtpiirkondadesse nii saastunud küllastunud kui ka küllastumata tsoonides. EKOGRID™ elektrokineetilise tervendamise lahendus kasutab nutikalt teatud elektrokineetilisi ja elektrokeemilisi reaktsioone, et tõhustada bioremediatsiooni ja ekogrid.fi / EKOGRID Oy, Nuijamiestentie 7, 00400 Helsinki, Finland / +358 20 743 2670 Electronically signed / Sähköisesti allekirjoitettu / Elektroniskt signerats / Elektronisk signert / Elektronisk underskrevet https://sign.visma.net/fi/document-check/eaafb5c2-3f70-4e96-8d76-e9b67293a960 www.vismasign.com  THIS IS A GOOGLETRANSLATION FROM ENGLISH TO ESTONIAN lagundada pinnases, põhjavees ja setetes orgaanilisi saasteaineid (in situ või ex situ). Optimeeritud impulsspinge mustrid, mis on selle meetodi nõuetekohaseks toimimiseks hädavajalikud, edastatakse EKOGRID™ juhtseadmega, mille programmeerimine optimeeritakse igale saidile. EKOGRID™ on täiustatud in situ tervendamistehnoloogia, mis täiustab looduslikke protsesse ja toetab täiendavaid tervendamismeetodeid. EKOGRID™ kasutab elektrokeemilisi nähtusi keemiliste radikaalide tekitamiseks mullaosakeste pinnal ning elektrokineetilisi ja elektroosmootseid nähtusi, et suurendada orgaaniliste saasteainete kättesaadavust bioremediatsiooniks, keemiliseks degradatsiooniks või mehaaniliseks eemaldamiseks EKOGRID™ ELEKTROKINEETILISE PARANDUSLAHENDUS SISALDAB JÄRGMISE KOMPONENTSI: 1. EKOGRID™ juhtseade 2. Elektriühendus või alternatiivne energiaallikas 3. Elektroodid, mis on paigaldatud töödeldava saaste sügavusele 4. Kaablid ja ühendused 5. Tarkvara 6. EKOGRID™ ekspertide oskusteave 7. Kombinatsioon teiste lahendustega, mida tavaliselt optimeerivad igal turul kohalikud partnerid, kuna neil on kohaliku pakkumise kohta teadmised. ekogrid.fi / EKOGRID Oy, Nuijamiestentie 7, 00400 Helsinki, Finland / +358 20 743 2670 Electronically signed / Sähköisesti allekirjoitettu / Elektroniskt signerats / Elektronisk signert / Elektronisk underskrevet https://sign.visma.net/fi/document-check/eaafb5c2-3f70-4e96-8d76-e9b67293a960 www.vismasign.com  THIS IS A GOOGLETRANSLATION FROM ENGLISH TO ESTONIAN Tüüpilise in situ saidi illustratsioon EKOGRID™ PARANDAMISE MEETOD LÜHIDALT EKOGRID on elektrokineetiline meetod, mis kasutab hästi tuntud loodusnähtusi ja reaktsioone: • elektroosmoos, elektroforees ja elektromigratsioon, • elektrokeemilised redoksreaktsioonid (nt elektrolüüs), • Bioremediatsiooni protsessid suurendasid mikroobide aktiivsust. Selle ainulaadse süsteemi tuum: • Optimeeritud impulsspinge väljund, • Väljundi sageli muutuv polaarsus: o See paneb pooride vee laetud sisu kiiresti edasi-tagasi liikuma (lühikesed elektroosmootsed impulsid), nii et esile kerkivad värskelt tekkinud vabad radikaalid ja hapnik, mis soodustavad ühendite oksüdeerumist. ekogrid.fi / EKOGRID Oy, Nuijamiestentie 7, 00400 Helsinki, Finland / +358 20 743 2670 Electronically signed / Sähköisesti allekirjoitettu / Elektroniskt signerats / Elektronisk signert / Elektronisk underskrevet https://sign.visma.net/fi/document-check/eaafb5c2-3f70-4e96-8d76-e9b67293a960 www.vismasign.com  THIS IS A GOOGLETRANSLATION FROM ENGLISH TO ESTONIAN o Süsteem kasutab maatriksi (pinnase) mahtuvuslikku olemust, võimaldades seega töötada väga madala väljundpingega. o Reaktsioonid toimuvad iga mullaosakese pinnal ja jaotuvad ühtlaselt kogu maatriksis ja täpselt seal, kus reostus asub. Mida peenem on pinnase tera suurus, seda tõhusamalt süsteem töötab tänu kiiremale ja täielikumale saneerimisele. MIS EELISED ON ELEKTROKINEEETILISEST PARANDAMIST VÕRRELDES TEISTE PARANDUSTEHNOLOOGIATEGA? EKOGRIDTM patenteeritud tooted ja tehnoloogiad on kulutõhusad, lihtsalt paigaldatavad ning ohutud kasutada nii operaatoritele kui ka keskkonnale. Kui kasutuselevõtufaasis on tehtud õiged seadistused, kasutab meie süsteem mullamaatriksi mahtuvuslikku olemust. Reaktsioonid toimuvad iga mullaosakese pinnal, täpselt seal, kus reostus on, ja kõikjal elektroodide vahel – mitte ainult paigaldatud elektroodidel. Selle tulemusena ei lähe energiat raisku ja süsteem tarbib väga vähe energiat. Mõju on kiiresti näha saasteainete kontsentratsiooni vähenemises pinnases ja põhjavees, samuti stabiliseerunud ORP ja lahustunud hapniku tasemes. EKOGRID™ tehnoloogia peamised eelised: • Sihtühendite pidev ja püsiv lagunemine • Lihtne paigaldada suhteliselt madalate kaasnevate kuludega • Töötab pinnasel, põhjaveel ja setetel ning eriti hästi väheläbilaskvatel muldadel nagu savi, muda ja peenliiv • Suurendab paljude orgaaniliste saasteainete in situ lagunemist • Loodusnähtustel põhinev intelligentne süsteem, • puudub sekundaarne müra-, gaasi- või osakeste saaste, • Madal energiatarve ja väga vähe ressursse, mis on vajalikud tööks ja hoolduseks, • Pole vaja ohtlikke kemikaale, • ei kahjusta loomastikku ega metsloomi, • ühildub alternatiivsete/taastuvate energiaallikatega, • Lihtne logistika ja tööohutus: kohapealne töötlemine ei vaja transporti ja on seega teostatav diskreetselt. Töötajad ei pea kohapeal viibima, välja arvatud paigaldamise, demonteerimise ja mõõtmisproovide võtmise ajal. • Tõhustab bioremediatsiooni • Põhjaveekihid töödeldakse samaaegselt pinnasega ekogrid.fi / EKOGRID Oy, Nuijamiestentie 7, 00400 Helsinki, Finland / +358 20 743 2670 Electronically signed / Sähköisesti allekirjoitettu / Elektroniskt signerats / Elektronisk signert / Elektronisk underskrevet https://sign.visma.net/fi/document-check/eaafb5c2-3f70-4e96-8d76-e9b67293a960 www.vismasign.com  THIS IS A GOOGLETRANSLATION FROM ENGLISH TO ESTONIAN Punkt 13. EKOGRID Oy on pühendunud 25-kuulisele heastamisajale. See on tingitud varasematest projektidest kogutud kogemustest ja projekti iseloomustuse teabest. Punkt 16. Meie soovitus on kasutada saaste eemaldamiseks in-situ tehnoloogiat EKOGRID. Punkt 17. Lepime kokku VAIDLUSTUSES toodud kulukalkulatsiooni infoga. Traditsioonilised meetodid võivad olla in situ meetoditega võrreldes mitu korda kallimad. Traditsioonilise kaevamis- ja puistamismeetodi muud puudused on sekundaarne reostus, transpordiga seotud logistilised probleemid ning vahemaa tervendamiskoha ja puhastuskeskuste vahel. Need võivad lisaks väravatasudele põhjustada märkimisväärseid transpordikulusid. Punkt 18. Selles punktis esitatud väited on ebatäpsed. Täiustatud bioparandus koosneb mitmest elemendist. Kuna EKOGRID tehnoloogia on täiustatud bioremediatsiooni meetod, ühendab see looduslike või koloniseeritud bakterite aktiveerimise elektrokineetilise oksüdatsiooni kaudu, millele lisanduvad vabade radikaalide teke ja aktiivsete komponentide suurem kättesaadavus pideva polaarsuse muutmise kaudu. ekogrid.fi / EKOGRID Oy, Nuijamiestentie 7, 00400 Helsinki, Finland / +358 20 743 2670 Electronically signed / Sähköisesti allekirjoitettu / Elektroniskt signerats / Elektronisk signert / Elektronisk underskrevet https://sign.visma.net/fi/document-check/eaafb5c2-3f70-4e96-8d76-e9b67293a960 www.vismasign.com  THIS IS A GOOGLETRANSLATION FROM ENGLISH TO ESTONIAN Punktid 19 ja 20 Nõustume proovivõtutulemuste tähelepanekutega. Oluline on mõista, et proovivõtutulemuste volatiilsust mõjutab saasteainete migratsioon erinevatel aegadel, mis on põhjustatud hooajalisest vihmast, põhjavee liikumisest või füüsilisest mõjust voogudele. Saasteallikateks on olnud allteenitud naftamahuti ja ühendustorud. Kui allikad on eemaldatud, on meil võimalik saada täpsemad proovivõtutulemused kohas, mis kirjeldab eemaldamisjärgseid tingimusi. On oluline, et enne koha tervendamise alustamist tehakse põhjalik proovide võtmine. Punkt 21. See on väga hea tähelepanek. EKOGRID-tehnoloogia suudab töödelda lihtsaid alifaatseid ja keerulisi aromaatseid ühendeid samaaegselt. Tervendamisprotsess on tõhus paljude erinevate saasteainete puhul. Toime põhineb aeroobsete bakterite suurenenud aktiivsusel ja vabade radikaalide tekkel. Seda selgitatakse lisas. Punkt 22. Nagu eespool mainitud, on EKOGRID Technology ökonoomne, ökoloogiline ja säästev tervendamismeetod. Punkt 23. Me ei nõustu väitega. Oleme teinud koostööd EL-i rahastatud akadeemiliste uurimisprogrammidega, nagu EiCLaR www.eiclar.eu, SEDREMED www.life-sedremed.eu, LTU (Luleå Tekniska Universitet) www.ltu.se, et demonstreerida tervendavat mõju ekogrid.fi / EKOGRID Oy, Nuijamiestentie 7, 00400 Helsinki, Finland / +358 20 743 2670 Electronically signed / Sähköisesti allekirjoitettu / Elektroniskt signerats / Elektronisk signert / Elektronisk underskrevet https://sign.visma.net/fi/document-check/eaafb5c2-3f70-4e96-8d76-e9b67293a960 www.vismasign.com  THIS IS A GOOGLETRANSLATION FROM ENGLISH TO ESTONIAN laiaulatuslike saasteainete skaalal. Samuti on varasemad projektid näidanud võimet ravida ka raskeid ühendeid. Punkt 28. Teave ettevõtte töötajate kohta on saadaval meie veebisaidil. Ettevõtte restruktureerimisprogrammi teave on avalikult kättesaadav. See kestab kuni 2027. aastani. Ettevõte on tehnoloogiat veebilehel tutvustanud ja ka viited on saadaval, välja arvatud juhul, kui konfidentsiaalsed kliendid. Helsingis, 14.2.2025 EKOGRID Oy Iisak Lusua tegevjuht Elektrooniliselt allkirjastatud ekogrid.fi / EKOGRID Oy, Nuijamiestentie 7, 00400 Helsinki, Finland / +358 20 743 2670 Electronically signed / Sähköisesti allekirjoitettu / Elektroniskt signerats / Elektronisk signert / Elektronisk underskrevet https://sign.visma.net/fi/document-check/eaafb5c2-3f70-4e96-8d76-e9b67293a960 www.vismasign.com  THIS IS A GOOGLETRANSLATION FROM ENGLISH TO ESTONIAN To whom it may concern, This letter comments on behalf of the “Third Party”, EKOGRID Oy, concerning the claims made by Pinnasepuhasatuse OU about EKOGRID Oy and the EKOGRID Technology in the Riigi Kinnisvara Tender number 287358. We are commenting on numbered points made in the “VAIDLUSTUS hankes viitenr 287358” made by Tepper and Partnerid, dated 10.02.2025. Point 7. EKOGRID Oy is working together with local partner MAVES OU to conduct the installation of EKOGRID System to the project site. Artto Pello from MAVES OU has previously executed several installation projects together with COO Iisak Lusua from EKOGRID Oy in Estonia. Typically, the grid-design is done by EKOGRID, and the implementation of the installation is done by MAVES OU. Both companies have extensive experience in contaminated soil and remediation and advisory of projects with contaminated project sites. EKOGRID Technology is a unique high technology method to remediate contaminated soils and groundwater, in comparison to traditional dig and dump methods, it is not labor intensive. This means that remediation project requires project personnel at site only at the installation and commissioning. The monitoring of the remediation is done by sampling in agreed intervals and the System monitoring is done remotely from the EKOGRID Office in Helsinki. The EKOGRID Staff visit sites together with MAVES Staff for the measurements of the System on agreed intervals. Point 10. EKOGRID Technology can be priced effectively due to the high automation of the remediation process. As mentioned earlier, the remediation process is not labor intensive. The installations of the EKOGRID system, site visits for measurements and the sampling requires the most at site labor. Other wise the monitoring and remediation process are automated. The prices comprise of installation and dismantling, materials, site visits and monthly rental of the EKOGRID System. Point 11. The description of the remediation method has been provided to the tenderer. Below is a short description: EKOGRID™ enhanced bioremediation processes are the basis of all projects we participate in. Applications include remediation with EKOGRID™ system alone and in combination with other remediation solutions. EKOGRID™ solution can be also used to transfer bioremediation supporting agents to targeted areas in both contaminated saturated and unsaturated zones. ekogrid.fi / EKOGRID Oy, Nuijamiestentie 7, 00400 Helsinki, Finland / +358 20 743 2670 Electronically signed / Sähköisesti allekirjoitettu / Elektroniskt signerats / Elektronisk signert / Elektronisk underskrevet https://sign.visma.net/fi/document-check/eaafb5c2-3f70-4e96-8d76-e9b67293a960 www.vismasign.com  THIS IS A GOOGLETRANSLATION FROM ENGLISH TO ESTONIAN EKOGRID™ Electrokinetic Remediation solution cleverly utilizes certain electrokinetic and electrochemical reactions to enhance bioremediation and break down organic pollutants in soil, groundwater and sediment (in situ or ex situ). Optimized pulsed voltage patterns, essential for the proper functioning of this method, are transmitted by EKOGRID™ control unit, which programming is optimized to each site. EKOGRID™ is an advanced in situ remediation technology which enhances natural processes and supports complementary remediation methods. EKOGRID™ utilizes electrochemical phenomena to generate chemical radicals on soil particle surfaces and electrokinetic and electro-osmotic phenomena to increase availability of organic contaminants for bioremediation, chemical degradation or mechanical removal. THE EKOGRID™ ELECTROKINETIC REMEDIATION SOLUTION COMPRISES THE FOLLOWING COMPONENTS: 1. EKOGRID™ control unit 2. Electrical connection or alternative energy source 3. Electrodes installed to the depth of contamination to be treated 4. Cables and connections 5. Software 6. Know-how of the EKOGRID™ experts 7. Combination with other solutions which is typically optimized by local partners in each market as they have the knowledge if the local offering ekogrid.fi / EKOGRID Oy, Nuijamiestentie 7, 00400 Helsinki, Finland / +358 20 743 2670 Electronically signed / Sähköisesti allekirjoitettu / Elektroniskt signerats / Elektronisk signert / Elektronisk underskrevet https://sign.visma.net/fi/document-check/eaafb5c2-3f70-4e96-8d76-e9b67293a960 www.vismasign.com  THIS IS A GOOGLETRANSLATION FROM ENGLISH TO ESTONIAN Illustration of typical in-situ site THE EKOGRID™ REMEDIATION METHOD IN A NUTSHELL EKOGRID is an electrokinetic method that utilizes natural well-known phenomena and reactions: • Electro-osmosis, electrophoresis and electromigration, • Electrochemical redox reactions (e.g. electrolysis), • Bio-remediation processes increased microbial activity. The core of this unique system: • Optimized pulsed voltage output, • Frequently changing polarity of the output: o This makes the charged contents of the pore water move quickly back and forth (short electro-osmotic pulses) so that freshly formed free radicals and oxygen that promote the oxidization of compounds emerge. ekogrid.fi / EKOGRID Oy, Nuijamiestentie 7, 00400 Helsinki, Finland / +358 20 743 2670 Electronically signed / Sähköisesti allekirjoitettu / Elektroniskt signerats / Elektronisk signert / Elektronisk underskrevet https://sign.visma.net/fi/document-check/eaafb5c2-3f70-4e96-8d76-e9b67293a960 www.vismasign.com  THIS IS A GOOGLETRANSLATION FROM ENGLISH TO ESTONIAN o The system uses the capacitive nature of the matrix (soil), thus enabling it to work at a very low output voltage. o Reactions will occur at the surface of each soil particle and evenly spread throughout the whole matrix and precisely where the pollution is. The finer the soil grain size, the more effectively the system operates due to faster and more complete remediation. WHAT ARE THE BENEFITS OF ELECTROKINETIC REMEDIATION COMPARED TO OTHER REMEDIATION TECHNOLOGIES? EKOGRIDTM patented products and technologies are cost-effective, simple to install, and safe to use both for the operators and the environment. With the correct settings made in the commissioning phase, our system utilizes the capacitive nature of the soil matrix. Reactions will occur at the surface of each soil particle, precisely where the pollution is and everywhere between the electrodes -not just at the installed electrodes. As a result, no energy will be wasted and the system will consume extremely low levels of energy. The effect can be quickly seen in the form of reduced pollutant concentrations in the soil and groundwater as well as stabilized ORP and dissolved oxygen levels. The key benefits of EKOGRID™ technology: • Continuous and sustained degradation of target compounds • Easy to install with relatively low related costs • Works on soil, groundwater and sediments, and especially well in low-permeable soils such as clays, silts and fine sands • Enhances in situ degradation of broad range of organic contaminants • Intelligent system based on natural phenomena, • No secondary pollution from noise, gas or particle pollution, • Low power consumption and very little resources needed for operations and maintenance, • No hazardous chemicals needed, • No harm to fauna or wildlife, • Alternative/renewable energy source-compatible, • Simple logistics and work safety: in situ treatment requires no transport and thus can be carried out discreetly. There is no need for personnel to be on site except during installation, dismantling, and measurement sampling. • Enhances bioremediation ekogrid.fi / EKOGRID Oy, Nuijamiestentie 7, 00400 Helsinki, Finland / +358 20 743 2670 Electronically signed / Sähköisesti allekirjoitettu / Elektroniskt signerats / Elektronisk signert / Elektronisk underskrevet https://sign.visma.net/fi/document-check/eaafb5c2-3f70-4e96-8d76-e9b67293a960 www.vismasign.com  THIS IS A GOOGLETRANSLATION FROM ENGLISH TO ESTONIAN • Groundwater aquifers are treated simultaneously with soil Point 13. EKOGRID Oy is committed to the 25 months remediation time. This is due to experience gathered from the previous projects and on the Characterization information provided for the project. Point 16. Our recommendation is to use EKOGRID in-situ technology for the removal of the contamination. Point 17. We agree on the cost estimate information provided in the VAIDLUSTUS. Traditional methods can be multiple times more expensive compared to in-situ methods. Other disadvantages of the traditional dig-and dump method are secondary pollution, logistic challenges with the transportation and distance between remediation site and the treatment centres. They can cause considerable transportation costs, besides the gate fees Point 18. The statements made in this point are in-accurate. The enhanced bioremediation comprises of several elements. As EKOGRID Technology is an enhanced bioremediation method, it combines the activation of natural or colonized bacteria through electrokinetic- oxidation added with creation of free radicals and increased availability of the active components through a continuous change of polarity. ekogrid.fi / EKOGRID Oy, Nuijamiestentie 7, 00400 Helsinki, Finland / +358 20 743 2670 Electronically signed / Sähköisesti allekirjoitettu / Elektroniskt signerats / Elektronisk signert / Elektronisk underskrevet https://sign.visma.net/fi/document-check/eaafb5c2-3f70-4e96-8d76-e9b67293a960 www.vismasign.com  THIS IS A GOOGLETRANSLATION FROM ENGLISH TO ESTONIAN Points 19 and 20 We agree with the observations on the sampling results. It is important to understand that the volatility of the sampling results is affected by the migration of the pollutants during different times, caused by a seasonal rain, movement of the groundwater or physical impact to the plume. The sources of the pollution have been subserviced oil tank and connecting pipelines. Ones the sources have been removed, we are able to achieve more accurate sampling results of the site describing after-removal site conditions. It is important, that thorough sampling is conducted, before starting the site remediation. Point 21. This is a very good observation. EKOGRID Technology can treat simple aliphatic and complex aromatic compounds simultaneously. The remediation process is effective to a wide scale of different pollutants. The effects are based on increased aerobic bacteria activity and the creation of free radicals. This is explained in the attachment. Point 22. As mentioned above, EKOGRID Technology is an economical, ecological and sustainable remediation method. Point 23. We do not agree with the statement. We have been working in co-operation with Academic Research Programs funded by EU, such as EiCLaR www.eiclar.eu, SEDREMED www.life-sedremed.eu, LTU (Luleå Tekniska Universitet) www.ltu.se to demonstrate the remediation effect on the wide scale of pollutants. Also, previous projects have demonstrated the capability of remediating heavy compounds as well. ekogrid.fi / EKOGRID Oy, Nuijamiestentie 7, 00400 Helsinki, Finland / +358 20 743 2670 Electronically signed / Sähköisesti allekirjoitettu / Elektroniskt signerats / Elektronisk signert / Elektronisk underskrevet https://sign.visma.net/fi/document-check/eaafb5c2-3f70-4e96-8d76-e9b67293a960 www.vismasign.com  THIS IS A GOOGLETRANSLATION FROM ENGLISH TO ESTONIAN Point 28. Information concerning the company staff is available at our website. Information of the Company Re-structuring program is publicly available. It will continue until 2027. Company has presented the technology on the website and also the references are available unless confidential clients. In Helsinki, 14.2.2025 EKOGRID Oy Iisak Lusua Chief Operating Officer Signed electronically ekogrid.fi / EKOGRID Oy, Nuijamiestentie 7, 00400 Helsinki, Finland / +358 20 743 2670 Electronically signed / Sähköisesti allekirjoitettu / Elektroniskt signerats / Elektronisk signert / Elektronisk underskrevet https://sign.visma.net/fi/document-check/eaafb5c2-3f70-4e96-8d76-e9b67293a960 www.vismasign.com SIGNATURES ALLEKIRJOITUKSET UNDERSKRIFTER SIGNATURER UNDERSKRIFTER This documents contains 14 pages before this page Tämä asiakirja sisältää 14 sivua ennen tätä sivua Detta dokument innehåller 14 sidor före denna sida Dokumentet inneholder 14 sider før denne siden Dette dokument indeholder 14 sider før denne side authority to sign asemavaltuutus ställningsfullmakt autoritet til å signere myndighed til at underskrive representative nimenkirjoitusoikeus firmateckningsrätt representant repræsentant custodial huoltaja/edunvalvoja förvaltare foresatte/verge frihedsberøvende Electronically signed / Sähköisesti allekirjoitettu / Elektroniskt signerats / Elektronisk signert / Elektronisk underskrevet https://sign.visma.net/fi/document-check/eaafb5c2-3f70-4e96-8d76-e9b67293a960 www.vismasign.com To whom it may concern, This letter comments on behalf of the “Third Party”, EKOGRID Oy, concerning the claims made by Pinnasepuhasatuse OU about EKOGRID Oy and the EKOGRID Technology in the Riigi Kinnisvara Tender number 287358. We are commenting on numbered points made in the “VAIDLUSTUS hankes viitenr 287358” made by Tepper and Partnerid, dated 10.02.2025. Point 7. EKOGRID Oy is working together with local partner MAVES OU to conduct the installation of EKOGRID System to the project site. Artto Pello from MAVES OU has previously executed several installation projects together with COO Iisak Lusua from EKOGRID Oy in Estonia. Typically, the grid-design is done by EKOGRID, and the implementation of the installation is done by MAVES OU. Both companies have extensive experience in contaminated soil and remediation and advisory of projects with contaminated project sites. EKOGRID Technology is a unique high technology method to remediate contaminated soils and groundwater, in comparison to traditional dig and dump methods, it is not labor intensive. This means that remediation project requires project personnel at site only at the installation and commissioning. The monitoring of the remediation is done by sampling in agreed intervals and the System monitoring is done remotely from the EKOGRID Office in Helsinki. The EKOGRID Staff visit sites together with MAVES Staff for the measurements of the System on agreed intervals. Point 10. EKOGRID Technology can be priced effectively due to the high automation of the remediation process. As mentioned earlier, the remediation process is not labor intensive. The installations of the EKOGRID system, site visits for measurements and the sampling requires the most at site labor. Other wise the monitoring and remediation process are automated. The prices comprise of installation and dismantling, materials, site visits and monthly rental of the EKOGRID System. Point 11. The description of the remediation method has been provided to the tenderer. Below is a short description: EKOGRID™ enhanced bioremediation processes are the basis of all projects we participate in. Applications include remediation with EKOGRID™ system alone and in combination with other remediation solutions. EKOGRID™ solution can be also used to transfer bioremediation supporting agents to targeted areas in both contaminated saturated and unsaturated zones. ekogrid.fi / EKOGRID Oy, Nuijamiestentie 7, 00400 Helsinki, Finland / +358 20 743 2670 Electronically signed / Sähköisesti allekirjoitettu / Elektroniskt signerats / Elektronisk signert / Elektronisk underskrevet https://sign.visma.net/fi/document-check/c0c5c13d-ef7d-4fa0-b89a-71a53bf32802 www.vismasign.com  EKOGRID™ Electrokinetic Remediation solution cleverly utilizes certain electrokinetic and electrochemical reactions to enhance bioremediation and break down organic pollutants in soil, groundwater and sediment (in situ or ex situ). Optimized pulsed voltage patterns, essential for the proper functioning of this method, are transmitted by EKOGRID™ control unit, which programming is optimized to each site. EKOGRID™ is an advanced in situ remediation technology which enhances natural processes and supports complementary remediation methods. EKOGRID™ utilizes electrochemical phenomena to generate chemical radicals on soil particle surfaces and electrokinetic and electro-osmotic phenomena to increase availability of organic contaminants for bioremediation, chemical degradation or mechanical removal. THE EKOGRID™ ELECTROKINETIC REMEDIATION SOLUTION COMPRISES THE FOLLOWING COMPONENTS: 1. EKOGRID™ control unit 2. Electrical connection or alternative energy source 3. Electrodes installed to the depth of contamination to be treated 4. Cables and connections 5. Software 6. Know-how of the EKOGRID™ experts 7. Combination with other solutions which is typically optimized by local partners in each market as they have the knowledge if the local offering ekogrid.fi / EKOGRID Oy, Nuijamiestentie 7, 00400 Helsinki, Finland / +358 20 743 2670 Electronically signed / Sähköisesti allekirjoitettu / Elektroniskt signerats / Elektronisk signert / Elektronisk underskrevet https://sign.visma.net/fi/document-check/c0c5c13d-ef7d-4fa0-b89a-71a53bf32802 www.vismasign.com  Illustration of typical in-situ site THE EKOGRID™ REMEDIATION METHOD IN A NUTSHELL EKOGRID is an electrokinetic method that utilizes natural well-known phenomena and reactions: • Electro-osmosis, electrophoresis and electromigration, • Electrochemical redox reactions (e.g. electrolysis), • Bio-remediation processes increased microbial activity. The core of this unique system: • Optimized pulsed voltage output, • Frequently changing polarity of the output: o This makes the charged contents of the pore water move quickly back and forth (short electro-osmotic pulses) so that freshly formed free radicals and oxygen that promote the oxidization of compounds emerge. ekogrid.fi / EKOGRID Oy, Nuijamiestentie 7, 00400 Helsinki, Finland / +358 20 743 2670 Electronically signed / Sähköisesti allekirjoitettu / Elektroniskt signerats / Elektronisk signert / Elektronisk underskrevet https://sign.visma.net/fi/document-check/c0c5c13d-ef7d-4fa0-b89a-71a53bf32802 www.vismasign.com  o The system uses the capacitive nature of the matrix (soil), thus enabling it to work at a very low output voltage. o Reactions will occur at the surface of each soil particle and evenly spread throughout the whole matrix and precisely where the pollution is. The finer the soil grain size, the more effectively the system operates due to faster and more complete remediation. WHAT ARE THE BENEFITS OF ELECTROKINETIC REMEDIATION COMPARED TO OTHER REMEDIATION TECHNOLOGIES? EKOGRIDTM patented products and technologies are cost-effective, simple to install, and safe to use both for the operators and the environment. With the correct settings made in the commissioning phase, our system utilizes the capacitive nature of the soil matrix. Reactions will occur at the surface of each soil particle, precisely where the pollution is and everywhere between the electrodes -not just at the installed electrodes. As a result, no energy will be wasted and the system will consume extremely low levels of energy. The effect can be quickly seen in the form of reduced pollutant concentrations in the soil and groundwater as well as stabilized ORP and dissolved oxygen levels. The key benefits of EKOGRID™ technology: • Continuous and sustained degradation of target compounds • Easy to install with relatively low related costs • Works on soil, groundwater and sediments, and especially well in low-permeable soils such as clays, silts and fine sands • Enhances in situ degradation of broad range of organic contaminants • Intelligent system based on natural phenomena, • No secondary pollution from noise, gas or particle pollution, • Low power consumption and very little resources needed for operations and maintenance, • No hazardous chemicals needed, • No harm to fauna or wildlife, • Alternative/renewable energy source-compatible, • Simple logistics and work safety: in situ treatment requires no transport and thus can be carried out discreetly. There is no need for personnel to be on site except during installation, dismantling, and measurement sampling. • Enhances bioremediation ekogrid.fi / EKOGRID Oy, Nuijamiestentie 7, 00400 Helsinki, Finland / +358 20 743 2670 Electronically signed / Sähköisesti allekirjoitettu / Elektroniskt signerats / Elektronisk signert / Elektronisk underskrevet https://sign.visma.net/fi/document-check/c0c5c13d-ef7d-4fa0-b89a-71a53bf32802 www.vismasign.com  • Groundwater aquifers are treated simultaneously with soil Point 13. EKOGRID Oy is committed to the 25 months remediation time. This is due to experience gathered from the previous projects and on the Characterization information provided for the project. Point 16. Our recommendation is to use EKOGRID in-situ technology for the removal of the contamination. Point 17. We agree on the cost estimate information provided in the VAIDLUSTUS. Traditional methods can be multiple times more expensive compared to in-situ methods. Other disadvantages of the traditional dig-and dump method are secondary pollution, logistic challenges with the transportation and distance between remediation site and the treatment centres. They can cause considerable transportation costs, besides the gate fees Point 18. The statements made in this point are in-accurate. The enhanced bioremediation comprises of several elements. As EKOGRID Technology is an enhanced bioremediation method, it combines the activation of natural or colonized bacteria through electrokinetic- oxidation added with creation of free radicals and increased availability of the active components through a continuous change of polarity. ekogrid.fi / EKOGRID Oy, Nuijamiestentie 7, 00400 Helsinki, Finland / +358 20 743 2670 Electronically signed / Sähköisesti allekirjoitettu / Elektroniskt signerats / Elektronisk signert / Elektronisk underskrevet https://sign.visma.net/fi/document-check/c0c5c13d-ef7d-4fa0-b89a-71a53bf32802 www.vismasign.com  Points 19 and 20 We agree with the observations on the sampling results. It is important to understand that the volatility of the sampling results is affected by the migration of the pollutants during different times, caused by a seasonal rain, movement of the groundwater or physical impact to the plume. The sources of the pollution have been subserviced oil tank and connecting pipelines. Ones the sources have been removed, we are able to achieve more accurate sampling results of the site describing after-removal site conditions. It is important, that thorough sampling is conducted, before starting the site remediation. Point 21. This is a very good observation. EKOGRID Technology can treat simple aliphatic and complex aromatic compounds simultaneously. The remediation process is effective to a wide scale of different pollutants. The effects are based on increased aerobic bacteria activity and the creation of free radicals. This is explained in the attachment. Point 22. As mentioned above, EKOGRID Technology is an economical, ecological and sustainable remediation method. Point 23. We do not agree with the statement. We have been working in co-operation with Academic Research Programs funded by EU, such as EiCLaR www.eiclar.eu, SEDREMED www.life-sedremed.eu, LTU (Luleå Tekniska Universitet) www.ltu.se to demonstrate the remediation effect on the wide scale of pollutants. Also, previous projects have demonstrated the capability of remediating heavy compounds as well. ekogrid.fi / EKOGRID Oy, Nuijamiestentie 7, 00400 Helsinki, Finland / +358 20 743 2670 Electronically signed / Sähköisesti allekirjoitettu / Elektroniskt signerats / Elektronisk signert / Elektronisk underskrevet https://sign.visma.net/fi/document-check/c0c5c13d-ef7d-4fa0-b89a-71a53bf32802 www.vismasign.com  Point 28. Information concerning the company staff is available at our website. Information of the Company Re-structuring program is publicly available. It will continue until 2027. Company has presented the technology on the website and also the references are available unless confidential clients. In Helsinki, 14.2.2025 EKOGRID Oy Iisak Lusua Chief Operating Officer Signed electronically ekogrid.fi / EKOGRID Oy, Nuijamiestentie 7, 00400 Helsinki, Finland / +358 20 743 2670 Electronically signed / Sähköisesti allekirjoitettu / Elektroniskt signerats / Elektronisk signert / Elektronisk underskrevet https://sign.visma.net/fi/document-check/c0c5c13d-ef7d-4fa0-b89a-71a53bf32802 www.vismasign.com SIGNATURES ALLEKIRJOITUKSET UNDERSKRIFTER SIGNATURER UNDERSKRIFTER This documents contains 7 pages before this page Tämä asiakirja sisältää 7 sivua ennen tätä sivua Detta dokument innehåller 7 sidor före denna sida Dokumentet inneholder 7 sider før denne siden Dette dokument indeholder 7 sider før denne side authority to sign asemavaltuutus ställningsfullmakt autoritet til å signere myndighed til at underskrive representative nimenkirjoitusoikeus firmateckningsrätt representant repræsentant custodial huoltaja/edunvalvoja förvaltare foresatte/verge frihedsberøvende Electronically signed / Sähköisesti allekirjoitettu / Elektroniskt signerats / Elektronisk signert / Elektronisk underskrevet https://sign.visma.net/fi/document-check/c0c5c13d-ef7d-4fa0-b89a-71a53bf32802 www.vismasign.com